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<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel"/>
  <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019cc591-a808-7ff8-b900-0ef7e815f5c8_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Accumulated amortization</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Accumulated Amortization</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_MinimumBalanceOfTotalAdvancesPercent_019cc591-a808-7aa6-aa85-0478872d9cc9_terseLabel_en-US" xlink:label="lab_onit_MinimumBalanceOfTotalAdvancesPercent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Minimum Balance Of Total Advances, Percent</link:label>
    <link:label id="lab_onit_MinimumBalanceOfTotalAdvancesPercent_label_en-US" xlink:label="lab_onit_MinimumBalanceOfTotalAdvancesPercent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Minimum Balance Of Total Advances, Percent</link:label>
    <link:label id="lab_onit_MinimumBalanceOfTotalAdvancesPercent_documentation_en-US" xlink:label="lab_onit_MinimumBalanceOfTotalAdvancesPercent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Minimum Balance Of Total Advances, Percent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_MinimumBalanceOfTotalAdvancesPercent" xlink:href="onit-20260331.xsd#onit_MinimumBalanceOfTotalAdvancesPercent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_MinimumBalanceOfTotalAdvancesPercent" xlink:to="lab_onit_MinimumBalanceOfTotalAdvancesPercent" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoanCountMember_019cc591-a808-7462-bba2-3949e725339f_terseLabel_en-US" xlink:label="lab_onit_LoanCountMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loan Count</link:label>
    <link:label id="lab_onit_LoanCountMember_label_en-US" xlink:label="lab_onit_LoanCountMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loan Count [Member]</link:label>
    <link:label id="lab_onit_LoanCountMember_documentation_en-US" xlink:label="lab_onit_LoanCountMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loan Count [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoanCountMember" xlink:href="onit-20260331.xsd#onit_LoanCountMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoanCountMember" xlink:to="lab_onit_LoanCountMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MeasurementInputDefaultRateMember_019cc591-a808-7ac6-9ee1-cd922dc8264b_terseLabel_en-US" xlink:label="lab_us-gaap_MeasurementInputDefaultRateMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Delinquency</link:label>
    <link:label id="lab_us-gaap_MeasurementInputDefaultRateMember_label_en-US" xlink:label="lab_us-gaap_MeasurementInputDefaultRateMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Input, Default Rate [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDefaultRateMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputDefaultRateMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MeasurementInputDefaultRateMember" xlink:to="lab_us-gaap_MeasurementInputDefaultRateMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardTmgPredtrmndFlag_terseLabel_en-US" xlink:label="lab_ecd_AwardTmgPredtrmndFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Timing Predetermined</link:label>
    <link:label id="lab_ecd_AwardTmgPredtrmndFlag_label_en-US" xlink:label="lab_ecd_AwardTmgPredtrmndFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Timing Predetermined [Flag]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgPredtrmndFlag" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AwardTmgPredtrmndFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardTmgPredtrmndFlag" xlink:to="lab_ecd_AwardTmgPredtrmndFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityFileNumber_019cc591-a808-78ac-b3a7-324479013e93_terseLabel_en-US" xlink:label="lab_dei_EntityFileNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity File Number</link:label>
    <link:label id="lab_dei_EntityFileNumber_label_en-US" xlink:label="lab_dei_EntityFileNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity File Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityFileNumber" xlink:to="lab_dei_EntityFileNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalMember_019cc591-a808-7fad-8b41-775eba073ca7_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Additional Paid-in Capital</link:label>
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalMember_label_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Additional Paid-in Capital [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdditionalPaidInCapitalMember" xlink:to="lab_us-gaap_AdditionalPaidInCapitalMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TabularListTableTextBlock_terseLabel_en-US" xlink:label="lab_ecd_TabularListTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tabular List, Table</link:label>
    <link:label id="lab_ecd_TabularListTableTextBlock_label_en-US" xlink:label="lab_ecd_TabularListTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tabular List [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TabularListTableTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_TabularListTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TabularListTableTextBlock" xlink:to="lab_ecd_TabularListTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_019cc591-a808-747b-88ac-24dbfd292802_terseLabel_en-US" xlink:label="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Recently Adopted Accounting Standards And Accounting Standards Issued but Not Yet Adopted</link:label>
    <link:label id="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">New Accounting Pronouncements, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:to="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock_019cc591-a808-7d42-b430-d6f4bd35d968_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Fair Value Assets and Liabilities</link:label>
    <link:label id="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock_label_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, by Balance Sheet Grouping [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByBalanceSheetGroupingTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTextBlock" xlink:to="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_EscrowMember_019cc591-a75f-76cc-8318-2b2506f720ab_terseLabel_en-US" xlink:label="lab_onit_EscrowMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Escrow</link:label>
    <link:label id="lab_onit_EscrowMember_label_en-US" xlink:label="lab_onit_EscrowMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Escrow [Member]</link:label>
    <link:label id="lab_onit_EscrowMember_documentation_en-US" xlink:label="lab_onit_EscrowMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Escrow</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_EscrowMember" xlink:href="onit-20260331.xsd#onit_EscrowMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_EscrowMember" xlink:to="lab_onit_EscrowMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_GinnieMaeMember_019cc591-a891-7cde-8272-dfcd717b7a56_terseLabel_en-US" xlink:label="lab_onit_GinnieMaeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ginnie Mae</link:label>
    <link:label id="lab_onit_GinnieMaeMember_label_en-US" xlink:label="lab_onit_GinnieMaeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ginnie Mae [Member]</link:label>
    <link:label id="lab_onit_GinnieMaeMember_documentation_en-US" xlink:label="lab_onit_GinnieMaeMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ginnie Mae</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_GinnieMaeMember" xlink:href="onit-20260331.xsd#onit_GinnieMaeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_GinnieMaeMember" xlink:to="lab_onit_GinnieMaeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueByMeasurementBasisAxis_019cc591-a891-772a-b959-0653e24af4d6_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementBasisAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Measurement Basis [Axis]</link:label>
    <link:label id="lab_us-gaap_FairValueByMeasurementBasisAxis_label_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementBasisAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Basis [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis" xlink:to="lab_us-gaap_FairValueByMeasurementBasisAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherExpenses_019cc591-a808-710d-98d4-799124f36385_terseLabel_en-US" xlink:label="lab_us-gaap_OtherExpenses" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other expenses</link:label>
    <link:label id="lab_us-gaap_OtherExpenses_label_en-US" xlink:label="lab_us-gaap_OtherExpenses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Expenses</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherExpenses" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherExpenses"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherExpenses" xlink:to="lab_us-gaap_OtherExpenses" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AdjToCompAxis_terseLabel_en-US" xlink:label="lab_ecd_AdjToCompAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustment to Compensation:</link:label>
    <link:label id="lab_ecd_AdjToCompAxis_label_en-US" xlink:label="lab_ecd_AdjToCompAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustment to Compensation [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AdjToCompAxis" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AdjToCompAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AdjToCompAxis" xlink:to="lab_ecd_AdjToCompAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_NamedExecutiveOfficersFnTextBlock_terseLabel_en-US" xlink:label="lab_ecd_NamedExecutiveOfficersFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Named Executive Officers, Footnote</link:label>
    <link:label id="lab_ecd_NamedExecutiveOfficersFnTextBlock_label_en-US" xlink:label="lab_ecd_NamedExecutiveOfficersFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Named Executive Officers, Footnote [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NamedExecutiveOfficersFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_NamedExecutiveOfficersFnTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_NamedExecutiveOfficersFnTextBlock" xlink:to="lab_ecd_NamedExecutiveOfficersFnTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_EBOAdvanceFacilityMember_019cc591-a892-789f-b802-203d51889af4_terseLabel_en-US" xlink:label="lab_onit_EBOAdvanceFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBO Advance Facility</link:label>
    <link:label id="lab_onit_EBOAdvanceFacilityMember_label_en-US" xlink:label="lab_onit_EBOAdvanceFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBO Advance Facility [Member]</link:label>
    <link:label id="lab_onit_EBOAdvanceFacilityMember_documentation_en-US" xlink:label="lab_onit_EBOAdvanceFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">EBO Advance Facility</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_EBOAdvanceFacilityMember" xlink:href="onit-20260331.xsd#onit_EBOAdvanceFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_EBOAdvanceFacilityMember" xlink:to="lab_onit_EBOAdvanceFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cc591-a808-756d-9eb9-25ca1291fef0_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivablePortfolioSegmentDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable Portfolio Segment [Domain]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivablePortfolioSegmentDomain_label_en-US" xlink:label="lab_us-gaap_FinancingReceivablePortfolioSegmentDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable Portfolio Segment [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain" xlink:to="lab_us-gaap_FinancingReceivablePortfolioSegmentDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_019cc591-a891-72b3-9630-bcffae8e8a9f_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Payment of preferred stock dividend</link:label>
    <link:label id="lab_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments of Ordinary Dividends, Preferred Stock and Preference Stock</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock" xlink:to="lab_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount_019cc591-a891-7066-8056-7b906c6381e9_terseLabel_en-US" xlink:label="lab_us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advance match funded liabilities ($291.3 and $341.4 related to VIEs)</link:label>
    <link:label id="lab_us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount_019cc591-a891-78f5-9c80-de91a39633d0_verboseLabel_en-US" xlink:label="lab_us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Advance match funded liabilities</link:label>
    <link:label id="lab_us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount_label_en-US" xlink:label="lab_us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount" xlink:to="lab_us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SeniorLienMember_019cc591-a891-78ab-b6a0-deb69a48a463_terseLabel_en-US" xlink:label="lab_us-gaap_SeniorLienMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Senior Lien</link:label>
    <link:label id="lab_us-gaap_SeniorLienMember_label_en-US" xlink:label="lab_us-gaap_SeniorLienMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Senior Lien [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorLienMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorLienMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SeniorLienMember" xlink:to="lab_us-gaap_SeniorLienMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MinimumNetWorthRequiredForCompliance_019cc591-a808-7281-9b30-3cfcd607a0f7_terseLabel_en-US" xlink:label="lab_us-gaap_MinimumNetWorthRequiredForCompliance" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net worth requirement</link:label>
    <link:label id="lab_us-gaap_MinimumNetWorthRequiredForCompliance_label_en-US" xlink:label="lab_us-gaap_MinimumNetWorthRequiredForCompliance" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Banking Regulation, Mortgage Banking, Net Worth, Minimum</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinimumNetWorthRequiredForCompliance" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinimumNetWorthRequiredForCompliance"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MinimumNetWorthRequiredForCompliance" xlink:to="lab_us-gaap_MinimumNetWorthRequiredForCompliance" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_TotalAssetsAbstract_019cc591-a891-79c1-b6a9-57f4158f90c6_terseLabel_en-US" xlink:label="lab_onit_TotalAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Assets</link:label>
    <link:label id="lab_onit_TotalAssetsAbstract_label_en-US" xlink:label="lab_onit_TotalAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Assets [Abstract]</link:label>
    <link:label id="lab_onit_TotalAssetsAbstract_documentation_en-US" xlink:label="lab_onit_TotalAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_TotalAssetsAbstract" xlink:href="onit-20260331.xsd#onit_TotalAssetsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_TotalAssetsAbstract" xlink:to="lab_onit_TotalAssetsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_OtherIncomeExpenseAbstract0_019cc591-a891-7f5b-a671-ad1c4d54c8ed_terseLabel_en-US" xlink:label="lab_onit_OtherIncomeExpenseAbstract0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other income (expense):</link:label>
    <link:label id="lab_onit_OtherIncomeExpenseAbstract0_label_en-US" xlink:label="lab_onit_OtherIncomeExpenseAbstract0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other income (expense): [Abstract]</link:label>
    <link:label id="lab_onit_OtherIncomeExpenseAbstract0_documentation_en-US" xlink:label="lab_onit_OtherIncomeExpenseAbstract0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OtherIncomeExpenseAbstract0" xlink:href="onit-20260331.xsd#onit_OtherIncomeExpenseAbstract0"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_OtherIncomeExpenseAbstract0" xlink:to="lab_onit_OtherIncomeExpenseAbstract0" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_WarehouseMortgageLoanFinancingFacilityMember_019cc591-a892-78cd-b589-b0f8f8681d95_terseLabel_en-US" xlink:label="lab_onit_WarehouseMortgageLoanFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Warehouse Mortgage Loan Financing Facility</link:label>
    <link:label id="lab_onit_WarehouseMortgageLoanFinancingFacilityMember_label_en-US" xlink:label="lab_onit_WarehouseMortgageLoanFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Warehouse Mortgage Loan Financing Facility [Member]</link:label>
    <link:label id="lab_onit_WarehouseMortgageLoanFinancingFacilityMember_documentation_en-US" xlink:label="lab_onit_WarehouseMortgageLoanFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Warehouse Mortgage Loan Financing Facility</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_WarehouseMortgageLoanFinancingFacilityMember" xlink:href="onit-20260331.xsd#onit_WarehouseMortgageLoanFinancingFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_WarehouseMortgageLoanFinancingFacilityMember" xlink:to="lab_onit_WarehouseMortgageLoanFinancingFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AdjToCompAmt_terseLabel_en-US" xlink:label="lab_ecd_AdjToCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustment to Compensation, Amount</link:label>
    <link:label id="lab_ecd_AdjToCompAmt_label_en-US" xlink:label="lab_ecd_AdjToCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustment to Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AdjToCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AdjToCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AdjToCompAmt" xlink:to="lab_ecd_AdjToCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ConcentrationRiskPercentage1_019cc591-a891-7825-8628-858a664ad391_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskPercentage1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Concentration risk (percent)</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskPercentage1_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskPercentage1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk, Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskPercentage1" xlink:to="lab_us-gaap_ConcentrationRiskPercentage1" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_019cc591-a808-7c0a-8e8e-57c1f8dd8158_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Unamortized discount and debt issuance costs</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_019cc591-a808-77e4-b4d9-de7ec9651463_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unamortized discount and debt issuance costs</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" xlink:to="lab_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInPrepaymentSpeedPercent_019cc591-a891-7102-9465-c590bc0737cf_terseLabel_en-US" xlink:label="lab_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInPrepaymentSpeedPercent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Prepayment Speed, Percent</link:label>
    <link:label id="lab_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInPrepaymentSpeedPercent_label_en-US" xlink:label="lab_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInPrepaymentSpeedPercent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Prepayment Speed, Percent</link:label>
    <link:label id="lab_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInPrepaymentSpeedPercent_documentation_en-US" xlink:label="lab_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInPrepaymentSpeedPercent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Prepayment Speed, Percent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInPrepaymentSpeedPercent" xlink:href="onit-20260331.xsd#onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInPrepaymentSpeedPercent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInPrepaymentSpeedPercent" xlink:to="lab_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInPrepaymentSpeedPercent" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_RepaymentsOfOtherFinancingLiabilities_019dd507-2dc3-759d-acc7-6ba335719b1c_terseLabel_en-US" xlink:label="lab_onit_RepaymentsOfOtherFinancingLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Repayment of MSR related financing liabilities</link:label>
    <link:label id="lab_onit_RepaymentsOfOtherFinancingLiabilities_label_en-US" xlink:label="lab_onit_RepaymentsOfOtherFinancingLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repayments Of Other Financing Liabilities</link:label>
    <link:label id="lab_onit_RepaymentsOfOtherFinancingLiabilities_documentation_en-US" xlink:label="lab_onit_RepaymentsOfOtherFinancingLiabilities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Repayments Of Other Financing Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_RepaymentsOfOtherFinancingLiabilities" xlink:href="onit-20260331.xsd#onit_RepaymentsOfOtherFinancingLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_RepaymentsOfOtherFinancingLiabilities" xlink:to="lab_onit_RepaymentsOfOtherFinancingLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ReverseMortgageSecuritizationNotes_019dd3de-8077-7203-ad43-cb6b197817b6_terseLabel_en-US" xlink:label="lab_onit_ReverseMortgageSecuritizationNotes" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reverse mortgage securitization notes, net (related to VIE)</link:label>
    <link:label id="lab_onit_ReverseMortgageSecuritizationNotes_label_en-US" xlink:label="lab_onit_ReverseMortgageSecuritizationNotes" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reverse Mortgage Securitization Notes</link:label>
    <link:label id="lab_onit_ReverseMortgageSecuritizationNotes_documentation_en-US" xlink:label="lab_onit_ReverseMortgageSecuritizationNotes" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Reverse Mortgage Securitization Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ReverseMortgageSecuritizationNotes" xlink:href="onit-20260331.xsd#onit_ReverseMortgageSecuritizationNotes"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ReverseMortgageSecuritizationNotes" xlink:to="lab_onit_ReverseMortgageSecuritizationNotes" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ShareBasedCompensation_019cc591-a75e-7a75-b79d-a95873a3d91b_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity-based compensation expense</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensation_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-Based Payment Arrangement, Noncash Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensation" xlink:to="lab_us-gaap_ShareBasedCompensation" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_MSRValuationAdjustmentNetIncreaseDecrease_019cc591-a891-72c3-ac6f-4b89648dba22_terseLabel_en-US" xlink:label="lab_onit_MSRValuationAdjustmentNetIncreaseDecrease" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MSR valuation adjustments, net</link:label>
    <link:label id="lab_onit_MSRValuationAdjustmentNetIncreaseDecrease_label_en-US" xlink:label="lab_onit_MSRValuationAdjustmentNetIncreaseDecrease" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">MSR valuation adjustment, net increase (decrease)</link:label>
    <link:label id="lab_onit_MSRValuationAdjustmentNetIncreaseDecrease_documentation_en-US" xlink:label="lab_onit_MSRValuationAdjustmentNetIncreaseDecrease" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">MSR valuation adjustment, net increase (decrease)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_MSRValuationAdjustmentNetIncreaseDecrease" xlink:href="onit-20260331.xsd#onit_MSRValuationAdjustmentNetIncreaseDecrease"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_MSRValuationAdjustmentNetIncreaseDecrease" xlink:to="lab_onit_MSRValuationAdjustmentNetIncreaseDecrease" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EmployeeStockOptionMember_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeStockOptionMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Employee Stock Option</link:label>
    <link:label id="lab_us-gaap_EmployeeStockOptionMember_label_en-US" xlink:label="lab_us-gaap_EmployeeStockOptionMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-Based Payment Arrangement, Option [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EmployeeStockOptionMember" xlink:to="lab_us-gaap_EmployeeStockOptionMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019cc591-a75f-77a7-a030-aa8f66d86c20_terseLabel_en-US" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Antidilutive Securities [Axis]</link:label>
    <link:label id="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_label_en-US" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Antidilutive Securities [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:to="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_InsiderTradingPoliciesProcLineItems_label_en-US" xlink:label="lab_ecd_InsiderTradingPoliciesProcLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Insider Trading Policies and Procedures [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_InsiderTradingPoliciesProcLineItems" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_InsiderTradingPoliciesProcLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_InsiderTradingPoliciesProcLineItems" xlink:to="lab_ecd_InsiderTradingPoliciesProcLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_stpr_NY_019cc591-a808-7dc7-8cee-78e9449c9ccd_terseLabel_en-US" xlink:label="lab_stpr_NY" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NEW YORK</link:label>
    <link:label id="lab_stpr_NY_label_en-US" xlink:label="lab_stpr_NY" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NEW YORK</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_NY" xlink:href="https://xbrl.sec.gov/stpr/2025/stpr-2025.xsd#stpr_NY"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_stpr_NY" xlink:to="lab_stpr_NY" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf20PercentAdverseChangeInDiscountRate_019cc591-a808-7591-bde7-a3c3554a067a_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf20PercentAdverseChangeInDiscountRate" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Weighted average discount rate, 20%</link:label>
    <link:label id="lab_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf20PercentAdverseChangeInDiscountRate_label_en-US" xlink:label="lab_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf20PercentAdverseChangeInDiscountRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Discount Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf20PercentAdverseChangeInDiscountRate" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf20PercentAdverseChangeInDiscountRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf20PercentAdverseChangeInDiscountRate" xlink:to="lab_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf20PercentAdverseChangeInDiscountRate" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockSharesAuthorized_019cc591-a808-7e84-88db-3a9562cc6370_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesAuthorized" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock, shares authorized (in shares)</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesAuthorized_label_en-US" xlink:label="lab_us-gaap_CommonStockSharesAuthorized" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Shares Authorized</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesAuthorized" xlink:to="lab_us-gaap_CommonStockSharesAuthorized" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_RealEstateOwned_019cc591-a808-7215-bf92-353ecdd5cbb5_terseLabel_en-US" xlink:label="lab_onit_RealEstateOwned" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real estate owned</link:label>
    <link:label id="lab_onit_RealEstateOwned_label_en-US" xlink:label="lab_onit_RealEstateOwned" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Real Estate Owned</link:label>
    <link:label id="lab_onit_RealEstateOwned_documentation_en-US" xlink:label="lab_onit_RealEstateOwned" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Real Estate Owned</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_RealEstateOwned" xlink:href="onit-20260331.xsd#onit_RealEstateOwned"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_RealEstateOwned" xlink:to="lab_onit_RealEstateOwned" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LossContingencyAbstract_019cc591-a75e-787d-850d-820d291a8135_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingencyAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loss Contingency [Abstract]</link:label>
    <link:label id="lab_us-gaap_LossContingencyAbstract_label_en-US" xlink:label="lab_us-gaap_LossContingencyAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loss Contingency [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingencyAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingencyAbstract" xlink:to="lab_us-gaap_LossContingencyAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LossContingencyAccrualProductLiabilityNet_019cc591-a891-74df-80be-52978ec46843_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingencyAccrualProductLiabilityNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mortgage insurance premium payable</link:label>
    <link:label id="lab_us-gaap_LossContingencyAccrualProductLiabilityNet_label_en-US" xlink:label="lab_us-gaap_LossContingencyAccrualProductLiabilityNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loss Contingency Accrual, Product Liability, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyAccrualProductLiabilityNet" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingencyAccrualProductLiabilityNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingencyAccrualProductLiabilityNet" xlink:to="lab_us-gaap_LossContingencyAccrualProductLiabilityNet" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_SubservicingAgreementAutomaticRenewalTerm_019df460-f18f-778a-accb-4a8f2f90ac5e_terseLabel_en-US" xlink:label="lab_onit_SubservicingAgreementAutomaticRenewalTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subservicing Agreement, Automatic Renewal Term</link:label>
    <link:label id="lab_onit_SubservicingAgreementAutomaticRenewalTerm_label_en-US" xlink:label="lab_onit_SubservicingAgreementAutomaticRenewalTerm" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subservicing Agreement, Automatic Renewal Term</link:label>
    <link:label id="lab_onit_SubservicingAgreementAutomaticRenewalTerm_documentation_en-US" xlink:label="lab_onit_SubservicingAgreementAutomaticRenewalTerm" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Subservicing Agreement, Automatic Renewal Term</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_SubservicingAgreementAutomaticRenewalTerm" xlink:href="onit-20260331.xsd#onit_SubservicingAgreementAutomaticRenewalTerm"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_SubservicingAgreementAutomaticRenewalTerm" xlink:to="lab_onit_SubservicingAgreementAutomaticRenewalTerm" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019cc591-a891-7442-834f-8f49796a0b03_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liabilities and Stockholders&#8217; Equity</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities and Equity [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_CoverAbstract_label_en-US" xlink:label="lab_dei_CoverAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cover [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CoverAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CoverAbstract" xlink:to="lab_dei_CoverAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_WarehouseAgreementBorrowingsMember_019cc591-a808-7bc9-91c0-fda469b4b1bd_terseLabel_en-US" xlink:label="lab_us-gaap_WarehouseAgreementBorrowingsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mortgage warehouse facilities</link:label>
    <link:label id="lab_us-gaap_WarehouseAgreementBorrowingsMember_label_en-US" xlink:label="lab_us-gaap_WarehouseAgreementBorrowingsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Warehouse Agreement Borrowings [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarehouseAgreementBorrowingsMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarehouseAgreementBorrowingsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WarehouseAgreementBorrowingsMember" xlink:to="lab_us-gaap_WarehouseAgreementBorrowingsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cc591-a808-7943-889e-b4a94bcfaebe_terseLabel_en-US" xlink:label="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Portion at Fair Value Measurement</link:label>
    <link:label id="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_label_en-US" xlink:label="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Portion at Fair Value Measurement [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:to="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_MaximumMember_019cc591-a808-7300-b332-94360b4b2a71_terseLabel_en-US" xlink:label="lab_srt_MaximumMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum</link:label>
    <link:label id="lab_srt_MaximumMember_label_en-US" xlink:label="lab_srt_MaximumMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MaximumMember" xlink:to="lab_srt_MaximumMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ResultsOfOperationsAbstract_019cc591-a808-7b8d-9788-877bc9b433fd_terseLabel_en-US" xlink:label="lab_onit_ResultsOfOperationsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Results of Operations&#160;</link:label>
    <link:label id="lab_onit_ResultsOfOperationsAbstract_label_en-US" xlink:label="lab_onit_ResultsOfOperationsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Results of Operations [Abstract]</link:label>
    <link:label id="lab_onit_ResultsOfOperationsAbstract_documentation_en-US" xlink:label="lab_onit_ResultsOfOperationsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ResultsOfOperationsAbstract" xlink:href="onit-20260331.xsd#onit_ResultsOfOperationsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ResultsOfOperationsAbstract" xlink:to="lab_onit_ResultsOfOperationsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForSaleCarriedAtFairValueTableTextBlock_019cc591-a891-7c99-bcc3-43ecc7a48552_terseLabel_en-US" xlink:label="lab_onit_LoansHeldForSaleCarriedAtFairValueTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Loans Held for Sale Fair Value</link:label>
    <link:label id="lab_onit_LoansHeldForSaleCarriedAtFairValueTableTextBlock_label_en-US" xlink:label="lab_onit_LoansHeldForSaleCarriedAtFairValueTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Sale Carried At Fair Value [Table Text Block]</link:label>
    <link:label id="lab_onit_LoansHeldForSaleCarriedAtFairValueTableTextBlock_documentation_en-US" xlink:label="lab_onit_LoansHeldForSaleCarriedAtFairValueTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Held For Sale Carried At Fair Value [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForSaleCarriedAtFairValueTableTextBlock" xlink:href="onit-20260331.xsd#onit_LoansHeldForSaleCarriedAtFairValueTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForSaleCarriedAtFairValueTableTextBlock" xlink:to="lab_onit_LoansHeldForSaleCarriedAtFairValueTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingAndOrigination_019cc591-a808-720f-8fc6-7103fce610fa_terseLabel_en-US" xlink:label="lab_onit_ServicingAndOrigination" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing and origination</link:label>
    <link:label id="lab_onit_ServicingAndOrigination_label_en-US" xlink:label="lab_onit_ServicingAndOrigination" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing and Origination</link:label>
    <link:label id="lab_onit_ServicingAndOrigination_documentation_en-US" xlink:label="lab_onit_ServicingAndOrigination" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Non-labor costs directly associated with income earned from servicing and originating mortgage loans, excluding amortization of mortgage servicing rights.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingAndOrigination" xlink:href="onit-20260331.xsd#onit_ServicingAndOrigination"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingAndOrigination" xlink:to="lab_onit_ServicingAndOrigination" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_FinancingLiabilityMortgageServicingRightsPledgedMember_019cc591-a808-7eea-a4f5-56efe8d77019_terseLabel_en-US" xlink:label="lab_onit_FinancingLiabilityMortgageServicingRightsPledgedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Liability Mortgage Servicing Rights Pledged [Member]</link:label>
    <link:label id="lab_onit_FinancingLiabilityMortgageServicingRightsPledgedMember_label_en-US" xlink:label="lab_onit_FinancingLiabilityMortgageServicingRightsPledgedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Liability Mortgage Servicing Rights Pledged [Member]</link:label>
    <link:label id="lab_onit_FinancingLiabilityMortgageServicingRightsPledgedMember_documentation_en-US" xlink:label="lab_onit_FinancingLiabilityMortgageServicingRightsPledgedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Financing liability mortgage servicing rights pledged.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_FinancingLiabilityMortgageServicingRightsPledgedMember" xlink:href="onit-20260331.xsd#onit_FinancingLiabilityMortgageServicingRightsPledgedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_FinancingLiabilityMortgageServicingRightsPledgedMember" xlink:to="lab_onit_FinancingLiabilityMortgageServicingRightsPledgedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_MaximumClaimAmountLessThan92Member_019cc591-a808-7267-94e6-ed527ccc12f8_terseLabel_en-US" xlink:label="lab_onit_MaximumClaimAmountLessThan92Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum Claim Amount, Less Than 92%</link:label>
    <link:label id="lab_onit_MaximumClaimAmountLessThan92Member_label_en-US" xlink:label="lab_onit_MaximumClaimAmountLessThan92Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum Claim Amount, Less Than 92% [Member]</link:label>
    <link:label id="lab_onit_MaximumClaimAmountLessThan92Member_documentation_en-US" xlink:label="lab_onit_MaximumClaimAmountLessThan92Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Maximum Claim Amount, Less Than 92%</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_MaximumClaimAmountLessThan92Member" xlink:href="onit-20260331.xsd#onit_MaximumClaimAmountLessThan92Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_MaximumClaimAmountLessThan92Member" xlink:to="lab_onit_MaximumClaimAmountLessThan92Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNet_019cc591-a808-7b1a-9aa0-1cb8f0b4a747_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Intangible assets, net (net of accumulated amortization of $14.3 and $14.0)</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNet_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsNet" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_InterestRateSwapFuturesAndTBAForwardMBSTradesMember_019cc591-a891-7287-9d97-f2ef708ebc1c_terseLabel_en-US" xlink:label="lab_onit_InterestRateSwapFuturesAndTBAForwardMBSTradesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest Rate Swap Futures And TBA Forward MBS Trades</link:label>
    <link:label id="lab_onit_InterestRateSwapFuturesAndTBAForwardMBSTradesMember_label_en-US" xlink:label="lab_onit_InterestRateSwapFuturesAndTBAForwardMBSTradesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Swap Futures And TBA Forward MBS Trades [Member]</link:label>
    <link:label id="lab_onit_InterestRateSwapFuturesAndTBAForwardMBSTradesMember_documentation_en-US" xlink:label="lab_onit_InterestRateSwapFuturesAndTBAForwardMBSTradesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest Rate Swap Futures And TBA Forward MBS Trades</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_InterestRateSwapFuturesAndTBAForwardMBSTradesMember" xlink:href="onit-20260331.xsd#onit_InterestRateSwapFuturesAndTBAForwardMBSTradesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_InterestRateSwapFuturesAndTBAForwardMBSTradesMember" xlink:to="lab_onit_InterestRateSwapFuturesAndTBAForwardMBSTradesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_MortgageWarehouseAgreementMember_019cc591-a891-7d32-a78a-2fa9043cb649_terseLabel_en-US" xlink:label="lab_onit_MortgageWarehouseAgreementMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mortgage Warehouse Agreement</link:label>
    <link:label id="lab_onit_MortgageWarehouseAgreementMember_label_en-US" xlink:label="lab_onit_MortgageWarehouseAgreementMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mortgage Warehouse Agreement [Member]</link:label>
    <link:label id="lab_onit_MortgageWarehouseAgreementMember_documentation_en-US" xlink:label="lab_onit_MortgageWarehouseAgreementMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents mortgage warehouse agreement.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_MortgageWarehouseAgreementMember" xlink:href="onit-20260331.xsd#onit_MortgageWarehouseAgreementMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_MortgageWarehouseAgreementMember" xlink:to="lab_onit_MortgageWarehouseAgreementMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AdvancesRollForward_019cc591-a891-770c-9416-d5985ed3dc64_terseLabel_en-US" xlink:label="lab_onit_AdvancesRollForward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advances [Roll Forward]</link:label>
    <link:label id="lab_onit_AdvancesRollForward_label_en-US" xlink:label="lab_onit_AdvancesRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advances [Roll Forward]</link:label>
    <link:label id="lab_onit_AdvancesRollForward_documentation_en-US" xlink:label="lab_onit_AdvancesRollForward" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Advances [Roll Forward]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AdvancesRollForward" xlink:href="onit-20260331.xsd#onit_AdvancesRollForward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AdvancesRollForward" xlink:to="lab_onit_AdvancesRollForward" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_NonPeoNeoAvgTotalCompAmt_terseLabel_en-US" xlink:label="lab_ecd_NonPeoNeoAvgTotalCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-PEO NEO Average Total Compensation Amount</link:label>
    <link:label id="lab_ecd_NonPeoNeoAvgTotalCompAmt_label_en-US" xlink:label="lab_ecd_NonPeoNeoAvgTotalCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-PEO NEO Average Total Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonPeoNeoAvgTotalCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_NonPeoNeoAvgTotalCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_NonPeoNeoAvgTotalCompAmt" xlink:to="lab_ecd_NonPeoNeoAvgTotalCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentLineItems_019cc591-a891-7720-9c97-f2538d0c1698_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument [Line Items]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentLineItems_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentLineItems" xlink:to="lab_us-gaap_DebtInstrumentLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AmountofAdditionsToHomeEquityConversionMortgageBackedSecurityRepurchasesValue_019cc591-a75e-7547-be4d-d1ce13c19706_terseLabel_en-US" xlink:label="lab_onit_AmountofAdditionsToHomeEquityConversionMortgageBackedSecurityRepurchasesValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Additions, repurchase securities, amount</link:label>
    <link:label id="lab_onit_AmountofAdditionsToHomeEquityConversionMortgageBackedSecurityRepurchasesValue_label_en-US" xlink:label="lab_onit_AmountofAdditionsToHomeEquityConversionMortgageBackedSecurityRepurchasesValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amount of Additions To Home Equity Conversion Mortgage-Backed Security Repurchases, Value</link:label>
    <link:label id="lab_onit_AmountofAdditionsToHomeEquityConversionMortgageBackedSecurityRepurchasesValue_documentation_en-US" xlink:label="lab_onit_AmountofAdditionsToHomeEquityConversionMortgageBackedSecurityRepurchasesValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This represents the amount of additions to HMBS repurchase securities.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AmountofAdditionsToHomeEquityConversionMortgageBackedSecurityRepurchasesValue" xlink:href="onit-20260331.xsd#onit_AmountofAdditionsToHomeEquityConversionMortgageBackedSecurityRepurchasesValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AmountofAdditionsToHomeEquityConversionMortgageBackedSecurityRepurchasesValue" xlink:to="lab_onit_AmountofAdditionsToHomeEquityConversionMortgageBackedSecurityRepurchasesValue" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AdjToNonPeoNeoCompFnTextBlock_terseLabel_en-US" xlink:label="lab_ecd_AdjToNonPeoNeoCompFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustment to Non-PEO NEO Compensation Footnote</link:label>
    <link:label id="lab_ecd_AdjToNonPeoNeoCompFnTextBlock_label_en-US" xlink:label="lab_ecd_AdjToNonPeoNeoCompFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustment to Non-PEO NEO Compensation Footnote [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AdjToNonPeoNeoCompFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AdjToNonPeoNeoCompFnTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AdjToNonPeoNeoCompFnTextBlock" xlink:to="lab_ecd_AdjToNonPeoNeoCompFnTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt_terseLabel_en-US" xlink:label="lab_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Forgone Recovery due to Disqualification of Tax Benefits, Amount</link:label>
    <link:label id="lab_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt_label_en-US" xlink:label="lab_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Forgone Recovery due to Disqualification of Tax Benefits, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt" xlink:to="lab_ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember_019cc591-a808-72ed-a8e9-3afca1feb652_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2026</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period One [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodOneMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodOneMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_NonRule10b51ArrTrmntdFlag_terseLabel_en-US" xlink:label="lab_ecd_NonRule10b51ArrTrmntdFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-Rule 10b5-1 Arrangement Terminated</link:label>
    <link:label id="lab_ecd_NonRule10b51ArrTrmntdFlag_label_en-US" xlink:label="lab_ecd_NonRule10b51ArrTrmntdFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-Rule 10b5-1 Arrangement Terminated [Flag]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonRule10b51ArrTrmntdFlag" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_NonRule10b51ArrTrmntdFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_NonRule10b51ArrTrmntdFlag" xlink:to="lab_ecd_NonRule10b51ArrTrmntdFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityShellCompany_019cc591-a808-7730-a8d3-5493a0d9e959_terseLabel_en-US" xlink:label="lab_dei_EntityShellCompany" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Shell Company</link:label>
    <link:label id="lab_dei_EntityShellCompany_label_en-US" xlink:label="lab_dei_EntityShellCompany" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Shell Company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityShellCompany"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityShellCompany" xlink:to="lab_dei_EntityShellCompany" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentTable_019cc591-a891-7d6b-8e7a-b1cf3dcbfc86_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Long-term Debt Instruments [Table]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentTable_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Long-Term Debt Instruments [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentTable" xlink:to="lab_us-gaap_DebtInstrumentTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarnings_019cc591-a808-750a-86e9-e32217d7cc7c_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarnings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in fair value included in earnings, net</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarnings_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarnings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarnings" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarnings"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarnings" xlink:to="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarnings" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StatementOfStockholdersEquityAbstract_019cc591-a891-7b90-b615-25b4ced07fe1_terseLabel_en-US" xlink:label="lab_us-gaap_StatementOfStockholdersEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement of Stockholders' Equity [Abstract]</link:label>
    <link:label id="lab_us-gaap_StatementOfStockholdersEquityAbstract_label_en-US" xlink:label="lab_us-gaap_StatementOfStockholdersEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Stockholders' Equity [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfStockholdersEquityAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfStockholdersEquityAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfStockholdersEquityAbstract" xlink:to="lab_us-gaap_StatementOfStockholdersEquityAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OperatingSegmentsMember_019cc591-a75f-7c77-834d-13994d86e3ae_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingSegmentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating Segments</link:label>
    <link:label id="lab_us-gaap_OperatingSegmentsMember_label_en-US" xlink:label="lab_us-gaap_OperatingSegmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Segments [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingSegmentsMember" xlink:to="lab_us-gaap_OperatingSegmentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardTmgMnpiCnsdrdFlag_terseLabel_en-US" xlink:label="lab_ecd_AwardTmgMnpiCnsdrdFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Timing MNPI Considered</link:label>
    <link:label id="lab_ecd_AwardTmgMnpiCnsdrdFlag_label_en-US" xlink:label="lab_ecd_AwardTmgMnpiCnsdrdFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Timing MNPI Considered [Flag]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgMnpiCnsdrdFlag" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AwardTmgMnpiCnsdrdFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardTmgMnpiCnsdrdFlag" xlink:to="lab_ecd_AwardTmgMnpiCnsdrdFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditFacilityTable_019cc591-a75e-7e13-b072-d75400582633_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of Credit Facility [Table]</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityTable_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityTable" xlink:to="lab_us-gaap_LineOfCreditFacilityTable" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_RemittanceOfAdvancesAndServicingFees_019cc591-a75e-7693-8e8a-ec0cde70a7f6_terseLabel_en-US" xlink:label="lab_onit_RemittanceOfAdvancesAndServicingFees" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Due to Rithm - Advance collections and servicing fees</link:label>
    <link:label id="lab_onit_RemittanceOfAdvancesAndServicingFees_label_en-US" xlink:label="lab_onit_RemittanceOfAdvancesAndServicingFees" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Remittance Of Advances And Servicing Fees</link:label>
    <link:label id="lab_onit_RemittanceOfAdvancesAndServicingFees_documentation_en-US" xlink:label="lab_onit_RemittanceOfAdvancesAndServicingFees" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This represents the amount of advances and servicing fees collected on behalf of NRZ, associated with rights to mortgage servicing rights sold and needs to be remitted.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_RemittanceOfAdvancesAndServicingFees" xlink:href="onit-20260331.xsd#onit_RemittanceOfAdvancesAndServicingFees"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_RemittanceOfAdvancesAndServicingFees" xlink:to="lab_onit_RemittanceOfAdvancesAndServicingFees" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherReceivables_019cc591-a808-73db-aedc-fa6588da2046_terseLabel_en-US" xlink:label="lab_us-gaap_OtherReceivables" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Receivables, net ($254.9 and $64.2 related to VIEs)</link:label>
    <link:label id="lab_us-gaap_OtherReceivables_019cc591-a808-7faf-b54c-2a60cf498eb6_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherReceivables" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Receivables, net</link:label>
    <link:label id="lab_us-gaap_OtherReceivables_019cc591-a808-79de-b9eb-c13877d2f065_totalLabel_en-US" xlink:label="lab_us-gaap_OtherReceivables" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Receivables, net ($254.9 and $64.2 related to VIEs)</link:label>
    <link:label id="lab_us-gaap_OtherReceivables_label_en-US" xlink:label="lab_us-gaap_OtherReceivables" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Receivables</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherReceivables" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherReceivables"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherReceivables" xlink:to="lab_us-gaap_OtherReceivables" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AgencyAndPLSMortgageServicingRightsFinancingFacilityMember_019cc591-a808-77b4-81a8-2a786d5d8de2_terseLabel_en-US" xlink:label="lab_onit_AgencyAndPLSMortgageServicingRightsFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Agency and PLS Mortgage Servicing Rights Financing Facility</link:label>
    <link:label id="lab_onit_AgencyAndPLSMortgageServicingRightsFinancingFacilityMember_label_en-US" xlink:label="lab_onit_AgencyAndPLSMortgageServicingRightsFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Agency and PLS Mortgage Servicing Rights Financing Facility [Member]</link:label>
    <link:label id="lab_onit_AgencyAndPLSMortgageServicingRightsFinancingFacilityMember_documentation_en-US" xlink:label="lab_onit_AgencyAndPLSMortgageServicingRightsFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Agency (Barclays) and PLS (Notes) Mortgage Servicing Rights Financing Facility</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AgencyAndPLSMortgageServicingRightsFinancingFacilityMember" xlink:href="onit-20260331.xsd#onit_AgencyAndPLSMortgageServicingRightsFinancingFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AgencyAndPLSMortgageServicingRightsFinancingFacilityMember" xlink:to="lab_onit_AgencyAndPLSMortgageServicingRightsFinancingFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_FloatEarningsEarnedInExchangeForServicingFinancialAssets_019cc591-a808-7317-874c-ca560e4ad842_terseLabel_en-US" xlink:label="lab_onit_FloatEarningsEarnedInExchangeForServicingFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Custodial accounts (float earnings)</link:label>
    <link:label id="lab_onit_FloatEarningsEarnedInExchangeForServicingFinancialAssets_label_en-US" xlink:label="lab_onit_FloatEarningsEarnedInExchangeForServicingFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Float Earnings Earned In Exchange For Servicing Financial Assets</link:label>
    <link:label id="lab_onit_FloatEarningsEarnedInExchangeForServicingFinancialAssets_documentation_en-US" xlink:label="lab_onit_FloatEarningsEarnedInExchangeForServicingFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents amount related to interest earned on unremitted loan payments held in custodial accounts, are due to the servicer in exchange for servicing the financial asset.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_FloatEarningsEarnedInExchangeForServicingFinancialAssets" xlink:href="onit-20260331.xsd#onit_FloatEarningsEarnedInExchangeForServicingFinancialAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_FloatEarningsEarnedInExchangeForServicingFinancialAssets" xlink:to="lab_onit_FloatEarningsEarnedInExchangeForServicingFinancialAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentFiscalPeriodFocus_019cc591-a75e-763d-a83b-0f85f6ce8f6b_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalPeriodFocus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Fiscal Period Focus</link:label>
    <link:label id="lab_dei_DocumentFiscalPeriodFocus_label_en-US" xlink:label="lab_dei_DocumentFiscalPeriodFocus" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Fiscal Period Focus</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentFiscalPeriodFocus" xlink:to="lab_dei_DocumentFiscalPeriodFocus" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TemporaryEquitySharesAuthorized_019cc591-a891-7b7a-9f1f-99741a7b2079_terseLabel_en-US" xlink:label="lab_us-gaap_TemporaryEquitySharesAuthorized" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Temporary Equity, Shares Authorized</link:label>
    <link:label id="lab_us-gaap_TemporaryEquitySharesAuthorized_label_en-US" xlink:label="lab_us-gaap_TemporaryEquitySharesAuthorized" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Temporary Equity, Shares Authorized</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquitySharesAuthorized" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquitySharesAuthorized"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TemporaryEquitySharesAuthorized" xlink:to="lab_us-gaap_TemporaryEquitySharesAuthorized" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardTmgMethodTextBlock_terseLabel_en-US" xlink:label="lab_ecd_AwardTmgMethodTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Timing Method</link:label>
    <link:label id="lab_ecd_AwardTmgMethodTextBlock_label_en-US" xlink:label="lab_ecd_AwardTmgMethodTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Timing Method [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgMethodTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AwardTmgMethodTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardTmgMethodTextBlock" xlink:to="lab_ecd_AwardTmgMethodTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_A70MillionPLSMSRFinancingFacilityMember_019cc591-a75f-75ce-892a-deeb5e66c348_terseLabel_en-US" xlink:label="lab_onit_A70MillionPLSMSRFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">70 Million PLS MSR Financing Facility</link:label>
    <link:label id="lab_onit_A70MillionPLSMSRFinancingFacilityMember_label_en-US" xlink:label="lab_onit_A70MillionPLSMSRFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">70 Million PLS MSR Financing Facility [Member]</link:label>
    <link:label id="lab_onit_A70MillionPLSMSRFinancingFacilityMember_documentation_en-US" xlink:label="lab_onit_A70MillionPLSMSRFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">70 Million PLS MSR Financing Facility</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_A70MillionPLSMSRFinancingFacilityMember" xlink:href="onit-20260331.xsd#onit_A70MillionPLSMSRFinancingFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_A70MillionPLSMSRFinancingFacilityMember" xlink:to="lab_onit_A70MillionPLSMSRFinancingFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AwardTypeAxis_terseLabel_en-US" xlink:label="lab_us-gaap_AwardTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Type</link:label>
    <link:label id="lab_us-gaap_AwardTypeAxis_label_en-US" xlink:label="lab_us-gaap_AwardTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AwardTypeAxis" xlink:to="lab_us-gaap_AwardTypeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueOtherChangesInFairValue_019cc591-a75f-71ae-829e-3a3d3d92bc32_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueOtherChangesInFairValue" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Realization of cash flows (2)</link:label>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueOtherChangesInFairValue_label_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueOtherChangesInFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset at Fair Value, Other Changes in Fair Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueOtherChangesInFairValue" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueOtherChangesInFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingAssetAtFairValueOtherChangesInFairValue" xlink:to="lab_us-gaap_ServicingAssetAtFairValueOtherChangesInFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_EquityMethodInvesteeNameDomain_019cc591-a808-751d-bc4d-7bcd8e80e7b4_terseLabel_en-US" xlink:label="lab_srt_EquityMethodInvesteeNameDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment, Name [Domain]</link:label>
    <link:label id="lab_srt_EquityMethodInvesteeNameDomain_label_en-US" xlink:label="lab_srt_EquityMethodInvesteeNameDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Name [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_EquityMethodInvesteeNameDomain" xlink:to="lab_srt_EquityMethodInvesteeNameDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_TradingSymbol_019cc591-a808-722c-b7e7-e908995207ad_terseLabel_en-US" xlink:label="lab_dei_TradingSymbol" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trading Symbol</link:label>
    <link:label id="lab_dei_TradingSymbol_label_en-US" xlink:label="lab_dei_TradingSymbol" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Symbol</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_TradingSymbol" xlink:to="lab_dei_TradingSymbol" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_019cc591-a891-7dd7-a0e2-c015fa3293cf_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity-based compensation and other (in shares)</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccruedLiabilitiesAndOtherLiabilities_019cc591-a808-76aa-9498-0e6d92735521_terseLabel_en-US" xlink:label="lab_us-gaap_AccruedLiabilitiesAndOtherLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accrued expenses (Other liabilities)</link:label>
    <link:label id="lab_us-gaap_AccruedLiabilitiesAndOtherLiabilities_label_en-US" xlink:label="lab_us-gaap_AccruedLiabilitiesAndOtherLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued Liabilities and Other Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesAndOtherLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities" xlink:to="lab_us-gaap_AccruedLiabilitiesAndOtherLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressCityOrTown_019cc591-a808-7de7-97db-e62d83893b76_terseLabel_en-US" xlink:label="lab_dei_EntityAddressCityOrTown" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, City or Town</link:label>
    <link:label id="lab_dei_EntityAddressCityOrTown_label_en-US" xlink:label="lab_dei_EntityAddressCityOrTown" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Address, City or Town</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressCityOrTown" xlink:to="lab_dei_EntityAddressCityOrTown" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ShortTermDebtTypeDomain_019cc591-a891-7988-95fb-a211e176d286_terseLabel_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-term Debt, Type [Domain]</link:label>
    <link:label id="lab_us-gaap_ShortTermDebtTypeDomain_label_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-Term Debt, Type [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain" xlink:to="lab_us-gaap_ShortTermDebtTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerBeforeAllowanceForLosses_019cc591-a808-7720-8ae5-f444d358645e_periodStartLabel_en-US" xlink:label="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerBeforeAllowanceForLosses" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance - before Allowance for Losses</link:label>
    <link:label id="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerBeforeAllowanceForLosses_019cc591-a808-788a-b047-f0d63475b3a9_periodEndLabel_en-US" xlink:label="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerBeforeAllowanceForLosses" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance - before Allowance for Losses</link:label>
    <link:label id="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerBeforeAllowanceForLosses_label_en-US" xlink:label="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerBeforeAllowanceForLosses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advances Payments On Behalf Of Borrower Before Allowance For Losses</link:label>
    <link:label id="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerBeforeAllowanceForLosses_documentation_en-US" xlink:label="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerBeforeAllowanceForLosses" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total advance payments made by financial institutions on behalf of borrowers in a servicing relationship.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AdvancesPaymentsOnBehalfOfBorrowerBeforeAllowanceForLosses" xlink:href="onit-20260331.xsd#onit_AdvancesPaymentsOnBehalfOfBorrowerBeforeAllowanceForLosses"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AdvancesPaymentsOnBehalfOfBorrowerBeforeAllowanceForLosses" xlink:to="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerBeforeAllowanceForLosses" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_NonPeoNeoAvgCompActuallyPaidAmt_terseLabel_en-US" xlink:label="lab_ecd_NonPeoNeoAvgCompActuallyPaidAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-PEO NEO Average Compensation Actually Paid Amount</link:label>
    <link:label id="lab_ecd_NonPeoNeoAvgCompActuallyPaidAmt_label_en-US" xlink:label="lab_ecd_NonPeoNeoAvgCompActuallyPaidAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-PEO NEO Average Compensation Actually Paid Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonPeoNeoAvgCompActuallyPaidAmt" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_NonPeoNeoAvgCompActuallyPaidAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_NonPeoNeoAvgCompActuallyPaidAmt" xlink:to="lab_ecd_NonPeoNeoAvgCompActuallyPaidAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_NewResidentialInvestmentCorpMember_019cc591-a891-7764-88a2-9874537b48b7_terseLabel_en-US" xlink:label="lab_onit_NewResidentialInvestmentCorpMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rithm</link:label>
    <link:label id="lab_onit_NewResidentialInvestmentCorpMember_label_en-US" xlink:label="lab_onit_NewResidentialInvestmentCorpMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">New Residential Investment Corp [Member]</link:label>
    <link:label id="lab_onit_NewResidentialInvestmentCorpMember_documentation_en-US" xlink:label="lab_onit_NewResidentialInvestmentCorpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">New Residential Investment Corp.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_NewResidentialInvestmentCorpMember" xlink:href="onit-20260331.xsd#onit_NewResidentialInvestmentCorpMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_NewResidentialInvestmentCorpMember" xlink:to="lab_onit_NewResidentialInvestmentCorpMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AdvancesAbstract_019cc591-a75e-7bc1-916c-83bfca9c2fc0_terseLabel_en-US" xlink:label="lab_onit_AdvancesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advances [Abstract]</link:label>
    <link:label id="lab_onit_AdvancesAbstract_label_en-US" xlink:label="lab_onit_AdvancesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advances [Abstract]</link:label>
    <link:label id="lab_onit_AdvancesAbstract_documentation_en-US" xlink:label="lab_onit_AdvancesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Advances [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AdvancesAbstract" xlink:href="onit-20260331.xsd#onit_AdvancesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AdvancesAbstract" xlink:to="lab_onit_AdvancesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_CompActuallyPaidVsOtherMeasureTextBlock_terseLabel_en-US" xlink:label="lab_ecd_CompActuallyPaidVsOtherMeasureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Compensation Actually Paid vs. Other Measure</link:label>
    <link:label id="lab_ecd_CompActuallyPaidVsOtherMeasureTextBlock_label_en-US" xlink:label="lab_ecd_CompActuallyPaidVsOtherMeasureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Compensation Actually Paid vs. Other Measure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_CompActuallyPaidVsOtherMeasureTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_CompActuallyPaidVsOtherMeasureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_CompActuallyPaidVsOtherMeasureTextBlock" xlink:to="lab_ecd_CompActuallyPaidVsOtherMeasureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_FairValueAdjustmentToLoansHeldForSale_019cc591-a891-792b-ad3f-5006e3d2a169_terseLabel_en-US" xlink:label="lab_onit_FairValueAdjustmentToLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair value adjustment to loans held for sale</link:label>
    <link:label id="lab_onit_FairValueAdjustmentToLoansHeldForSale_label_en-US" xlink:label="lab_onit_FairValueAdjustmentToLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair value adjustment to loans held for sale</link:label>
    <link:label id="lab_onit_FairValueAdjustmentToLoansHeldForSale_documentation_en-US" xlink:label="lab_onit_FairValueAdjustmentToLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fair value adjustment to loans held for sale</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_FairValueAdjustmentToLoansHeldForSale" xlink:href="onit-20260331.xsd#onit_FairValueAdjustmentToLoansHeldForSale"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_FairValueAdjustmentToLoansHeldForSale" xlink:to="lab_onit_FairValueAdjustmentToLoansHeldForSale" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RegulatoryAgencyAxis_019cc591-a808-763e-ad72-25cd71c42027_terseLabel_en-US" xlink:label="lab_us-gaap_RegulatoryAgencyAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Regulatory Agency [Axis]</link:label>
    <link:label id="lab_us-gaap_RegulatoryAgencyAxis_label_en-US" xlink:label="lab_us-gaap_RegulatoryAgencyAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Regulatory Agency [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAgencyAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RegulatoryAgencyAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RegulatoryAgencyAxis" xlink:to="lab_us-gaap_RegulatoryAgencyAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityEmergingGrowthCompany_019cc591-a808-7d07-915d-ed45530e9e5b_terseLabel_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Emerging Growth Company</link:label>
    <link:label id="lab_dei_EntityEmergingGrowthCompany_label_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Emerging Growth Company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityEmergingGrowthCompany" xlink:to="lab_dei_EntityEmergingGrowthCompany" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_SeriesTwoThousandTwentyFiveVariableFundingNotesOneMember_019cc591-a75f-7dde-ad2d-a96d51ae35d3_terseLabel_en-US" xlink:label="lab_onit_SeriesTwoThousandTwentyFiveVariableFundingNotesOneMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">$350 million PGAF Issuer LLC - Advance Receivables Backed Notes, Series 2025-VF1</link:label>
    <link:label id="lab_onit_SeriesTwoThousandTwentyFiveVariableFundingNotesOneMember_label_en-US" xlink:label="lab_onit_SeriesTwoThousandTwentyFiveVariableFundingNotesOneMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Series Two Thousand Twenty Five Variable Funding Notes One [Member]</link:label>
    <link:label id="lab_onit_SeriesTwoThousandTwentyFiveVariableFundingNotesOneMember_documentation_en-US" xlink:label="lab_onit_SeriesTwoThousandTwentyFiveVariableFundingNotesOneMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Series Two Thousand Twenty Five Variable Funding Notes One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_SeriesTwoThousandTwentyFiveVariableFundingNotesOneMember" xlink:href="onit-20260331.xsd#onit_SeriesTwoThousandTwentyFiveVariableFundingNotesOneMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_SeriesTwoThousandTwentyFiveVariableFundingNotesOneMember" xlink:to="lab_onit_SeriesTwoThousandTwentyFiveVariableFundingNotesOneMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember_terseLabel_en-US" xlink:label="lab_ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year</link:label>
    <link:label id="lab_ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember_label_en-US" xlink:label="lab_ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember" xlink:to="lab_ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_019cc591-a808-77aa-8e32-dddba6d35542_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other revenue, net</link:label>
    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_label_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue from Contract with Customer, Including Assessed Tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:to="lab_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DeferredFinanceCostsNet_019cc591-a891-7f32-8fdf-e63596c08b0b_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredFinanceCostsNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Prepaid lender fees, net</link:label>
    <link:label id="lab_us-gaap_DeferredFinanceCostsNet_label_en-US" xlink:label="lab_us-gaap_DeferredFinanceCostsNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Issuance Costs, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredFinanceCostsNet" xlink:to="lab_us-gaap_DeferredFinanceCostsNet" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeGainLossOnDerivativeNet_019cc591-a808-751e-a962-d409325b55a0_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeGainLossOnDerivativeNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gains (losses) on derivatives</link:label>
    <link:label id="lab_us-gaap_DerivativeGainLossOnDerivativeNet_019cc591-a808-7c2b-9cc4-bef4e4739f86_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DerivativeGainLossOnDerivativeNet" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Derivative, Gain (Loss) on Derivative, Net</link:label>
    <link:label id="lab_us-gaap_DerivativeGainLossOnDerivativeNet_label_en-US" xlink:label="lab_us-gaap_DerivativeGainLossOnDerivativeNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Gain (Loss) on Derivative, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeGainLossOnDerivativeNet" xlink:to="lab_us-gaap_DerivativeGainLossOnDerivativeNet" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RestrictedCashAndCashEquivalents_019cc591-a891-79f5-8a26-c6ae225284b7_verboseLabel_en-US" xlink:label="lab_us-gaap_RestrictedCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Restricted cash ($58.9 and $37.3 related to variable interest entities (VIEs))</link:label>
    <link:label id="lab_us-gaap_RestrictedCashAndCashEquivalents_019cc591-a891-7c88-8625-ba5191faec5f_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restricted cash</link:label>
    <link:label id="lab_us-gaap_RestrictedCashAndCashEquivalents_label_en-US" xlink:label="lab_us-gaap_RestrictedCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restricted Cash and Cash Equivalent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalents" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalents"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalents" xlink:to="lab_us-gaap_RestrictedCashAndCashEquivalents" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockSharesOutstanding_019cc591-a891-700c-9cb9-51efeddb5c9d_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock, shares, outstanding (in shares)</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesOutstanding_019cc591-a891-7f00-b60c-136ecfb04b3a_periodStartLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance (in shares)</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesOutstanding_019cc591-a891-7b62-8c3b-5f9a08aa199f_periodEndLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance (in shares)</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesOutstanding_label_en-US" xlink:label="lab_us-gaap_CommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Shares, Outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesOutstanding" xlink:to="lab_us-gaap_CommonStockSharesOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProvisionForDoubtfulAccounts_019cc591-a891-7d2a-bcfb-bff37cb3d1f3_terseLabel_en-US" xlink:label="lab_us-gaap_ProvisionForDoubtfulAccounts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Provision for bad debts (advances and receivables)</link:label>
    <link:label id="lab_us-gaap_ProvisionForDoubtfulAccounts_label_en-US" xlink:label="lab_us-gaap_ProvisionForDoubtfulAccounts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounts Receivable, Credit Loss Expense (Reversal)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProvisionForDoubtfulAccounts" xlink:to="lab_us-gaap_ProvisionForDoubtfulAccounts" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_GainLossOnSalesOfLoansNet_019cc591-a891-7b7c-810a-40c45fa3fac4_terseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSalesOfLoansNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gain on loans held for sale, net</link:label>
    <link:label id="lab_us-gaap_GainLossOnSalesOfLoansNet_label_en-US" xlink:label="lab_us-gaap_GainLossOnSalesOfLoansNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Sales of Loans, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSalesOfLoansNet" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnSalesOfLoansNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnSalesOfLoansNet" xlink:to="lab_us-gaap_GainLossOnSalesOfLoansNet" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherAssetsFairValueDisclosure_019cc591-a808-79a4-bdbc-202e5734ab4d_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other assets, at fair value</link:label>
    <link:label id="lab_us-gaap_OtherAssetsFairValueDisclosure_label_en-US" xlink:label="lab_us-gaap_OtherAssetsFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Assets, Fair Value Disclosure</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsFairValueDisclosure" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsFairValueDisclosure"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssetsFairValueDisclosure" xlink:to="lab_us-gaap_OtherAssetsFairValueDisclosure" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock_019cc591-a891-78d4-b1c7-5aecb3a25754_terseLabel_en-US" xlink:label="lab_us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Receivables</link:label>
    <link:label id="lab_us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock_label_en-US" xlink:label="lab_us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans, Notes, Trade and Other Receivables Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock" xlink:to="lab_us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_MortgageServicingRightsTitleRetainedMember_019cc591-a808-7ae4-8af5-7493547b6fe1_terseLabel_en-US" xlink:label="lab_onit_MortgageServicingRightsTitleRetainedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mortgage Servicing Rights Title Retained</link:label>
    <link:label id="lab_onit_MortgageServicingRightsTitleRetainedMember_label_en-US" xlink:label="lab_onit_MortgageServicingRightsTitleRetainedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mortgage Servicing Rights Title Retained [Member]</link:label>
    <link:label id="lab_onit_MortgageServicingRightsTitleRetainedMember_documentation_en-US" xlink:label="lab_onit_MortgageServicingRightsTitleRetainedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Mortgage Servicing Rights Title Retained.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_MortgageServicingRightsTitleRetainedMember" xlink:href="onit-20260331.xsd#onit_MortgageServicingRightsTitleRetainedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_MortgageServicingRightsTitleRetainedMember" xlink:to="lab_onit_MortgageServicingRightsTitleRetainedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInDelinquency_019dd3ef-5593-7e27-a86e-c41295a46221_negatedTerseLabel_en-US" xlink:label="lab_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInDelinquency" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Delinquency</link:label>
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    <link:label id="lab_onit_HMBSRelatedBorrowingsMember_019cc591-a808-7fe4-bb00-0ded8ff73712_terseLabel_en-US" xlink:label="lab_onit_HMBSRelatedBorrowingsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HMBS - Related Borrowings</link:label>
    <link:label id="lab_onit_HMBSRelatedBorrowingsMember_label_en-US" xlink:label="lab_onit_HMBSRelatedBorrowingsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">HMBS - Related Borrowings [Member]</link:label>
    <link:label id="lab_onit_HMBSRelatedBorrowingsMember_documentation_en-US" xlink:label="lab_onit_HMBSRelatedBorrowingsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">HMBS - Related Borrowings [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_HMBSRelatedBorrowingsMember" xlink:href="onit-20260331.xsd#onit_HMBSRelatedBorrowingsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_HMBSRelatedBorrowingsMember" xlink:to="lab_onit_HMBSRelatedBorrowingsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForSaleTextBlock_019cc591-a808-7370-8bcf-64c5546fe121_terseLabel_en-US" xlink:label="lab_onit_LoansHeldForSaleTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans Held for Sale - Fair Value</link:label>
    <link:label id="lab_onit_LoansHeldForSaleTextBlock_label_en-US" xlink:label="lab_onit_LoansHeldForSaleTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Sale [Text Block]</link:label>
    <link:label id="lab_onit_LoansHeldForSaleTextBlock_documentation_en-US" xlink:label="lab_onit_LoansHeldForSaleTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The entire disclosure for the loans held for sale carried at fair value and lower of cost or fair value.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForSaleTextBlock" xlink:href="onit-20260331.xsd#onit_LoansHeldForSaleTextBlock"/>
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    <link:label id="lab_onit_OLITAssetBackedNotesSeries2025HB1Member_019cc591-a891-7da6-a125-17c11c8284d1_terseLabel_en-US" xlink:label="lab_onit_OLITAssetBackedNotesSeries2025HB1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OLIT Asset-Backed Notes, Series 2025-HB1</link:label>
    <link:label id="lab_onit_OLITAssetBackedNotesSeries2025HB1Member_label_en-US" xlink:label="lab_onit_OLITAssetBackedNotesSeries2025HB1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">OLIT Asset-Backed Notes, Series 2025-HB1 [Member]</link:label>
    <link:label id="lab_onit_OLITAssetBackedNotesSeries2025HB1Member_documentation_en-US" xlink:label="lab_onit_OLITAssetBackedNotesSeries2025HB1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">OLIT Asset-Backed Notes, Series 2025-HB1</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OLITAssetBackedNotesSeries2025HB1Member" xlink:href="onit-20260331.xsd#onit_OLITAssetBackedNotesSeries2025HB1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_OLITAssetBackedNotesSeries2025HB1Member" xlink:to="lab_onit_OLITAssetBackedNotesSeries2025HB1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AdvanacesMember_019dd4f3-ae3c-7db2-b2fa-03da995c7ff3_terseLabel_en-US" xlink:label="lab_onit_AdvanacesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advanaces</link:label>
    <link:label id="lab_onit_AdvanacesMember_label_en-US" xlink:label="lab_onit_AdvanacesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advanaces [Member]</link:label>
    <link:label id="lab_onit_AdvanacesMember_documentation_en-US" xlink:label="lab_onit_AdvanacesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Advanaces</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AdvanacesMember" xlink:href="onit-20260331.xsd#onit_AdvanacesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AdvanacesMember" xlink:to="lab_onit_AdvanacesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_FinancingReceivableAllowanceForCreditLossWriteoffsAndOther_019cc591-a892-79c5-b5ac-5d22a7cc065a_terseLabel_en-US" xlink:label="lab_onit_FinancingReceivableAllowanceForCreditLossWriteoffsAndOther" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net charge-offs and other</link:label>
    <link:label id="lab_onit_FinancingReceivableAllowanceForCreditLossWriteoffsAndOther_label_en-US" xlink:label="lab_onit_FinancingReceivableAllowanceForCreditLossWriteoffsAndOther" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Allowance For Credit Loss, Writeoffs And Other</link:label>
    <link:label id="lab_onit_FinancingReceivableAllowanceForCreditLossWriteoffsAndOther_documentation_en-US" xlink:label="lab_onit_FinancingReceivableAllowanceForCreditLossWriteoffsAndOther" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Financing Receivable, Allowance For Credit Loss, Writeoffs And Other</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_FinancingReceivableAllowanceForCreditLossWriteoffsAndOther" xlink:href="onit-20260331.xsd#onit_FinancingReceivableAllowanceForCreditLossWriteoffsAndOther"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_FinancingReceivableAllowanceForCreditLossWriteoffsAndOther" xlink:to="lab_onit_FinancingReceivableAllowanceForCreditLossWriteoffsAndOther" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_FinancingLiabilityExcessServicingSpreadMember_019cc591-a892-7d6d-b890-9509c026f99f_verboseLabel_en-US" xlink:label="lab_onit_FinancingLiabilityExcessServicingSpreadMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Financing Liability Excess Servicing Spread [Member]</link:label>
    <link:label id="lab_onit_FinancingLiabilityExcessServicingSpreadMember_019cc591-a892-733c-aa0d-7ff58c1aa2c9_terseLabel_en-US" xlink:label="lab_onit_FinancingLiabilityExcessServicingSpreadMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Liability Excess Servicing Spread [Member]</link:label>
    <link:label id="lab_onit_FinancingLiabilityExcessServicingSpreadMember_label_en-US" xlink:label="lab_onit_FinancingLiabilityExcessServicingSpreadMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Liability Excess Servicing Spread [Member]</link:label>
    <link:label id="lab_onit_FinancingLiabilityExcessServicingSpreadMember_documentation_en-US" xlink:label="lab_onit_FinancingLiabilityExcessServicingSpreadMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Financing Liability Excess Servicing Spread</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_FinancingLiabilityExcessServicingSpreadMember" xlink:href="onit-20260331.xsd#onit_FinancingLiabilityExcessServicingSpreadMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_FinancingLiabilityExcessServicingSpreadMember" xlink:to="lab_onit_FinancingLiabilityExcessServicingSpreadMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_DvddsOrOthrErngsPdOnEqtyAwrdsNtOthrwsRflctdInTtlCompForCvrdYrMember_terseLabel_en-US" xlink:label="lab_ecd_DvddsOrOthrErngsPdOnEqtyAwrdsNtOthrwsRflctdInTtlCompForCvrdYrMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year</link:label>
    <link:label id="lab_ecd_DvddsOrOthrErngsPdOnEqtyAwrdsNtOthrwsRflctdInTtlCompForCvrdYrMember_label_en-US" xlink:label="lab_ecd_DvddsOrOthrErngsPdOnEqtyAwrdsNtOthrwsRflctdInTtlCompForCvrdYrMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_DvddsOrOthrErngsPdOnEqtyAwrdsNtOthrwsRflctdInTtlCompForCvrdYrMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_DvddsOrOthrErngsPdOnEqtyAwrdsNtOthrwsRflctdInTtlCompForCvrdYrMember"/>
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    <link:label id="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_019cc591-a808-7596-b43a-d31778ceeda8_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instruments and Hedging Activities Disclosure [Abstract]</link:label>
    <link:label id="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_label_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instruments and Hedging Activities Disclosure [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract"/>
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    <link:label id="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019cc591-a891-7bea-917e-d5afc0bab629_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Debt instrument, interest rate</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019cc591-a891-7b20-a172-dce95aea7e6a_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted average interest rate</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Interest Rate, Effective Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
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    <link:label id="lab_onit_PrincipalAndInterestMember_019cc591-a891-76eb-9af8-20c53d936355_terseLabel_en-US" xlink:label="lab_onit_PrincipalAndInterestMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Principal and interest</link:label>
    <link:label id="lab_onit_PrincipalAndInterestMember_label_en-US" xlink:label="lab_onit_PrincipalAndInterestMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Principal And Interest [Member]</link:label>
    <link:label id="lab_onit_PrincipalAndInterestMember_documentation_en-US" xlink:label="lab_onit_PrincipalAndInterestMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Advances on principal and interest.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_PrincipalAndInterestMember" xlink:href="onit-20260331.xsd#onit_PrincipalAndInterestMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_PrincipalAndInterestMember" xlink:to="lab_onit_PrincipalAndInterestMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PledgedStatusDomain_019cc591-a808-7722-9a56-52e4e256850e_terseLabel_en-US" xlink:label="lab_us-gaap_PledgedStatusDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pledged Status [Domain]</link:label>
    <link:label id="lab_us-gaap_PledgedStatusDomain_label_en-US" xlink:label="lab_us-gaap_PledgedStatusDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pledged Status [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PledgedStatusDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PledgedStatusDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PledgedStatusDomain" xlink:to="lab_us-gaap_PledgedStatusDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressPostalZipCode_019cc591-a808-7bbe-a6a5-75cfbf28c8ee_terseLabel_en-US" xlink:label="lab_dei_EntityAddressPostalZipCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, Postal Zip Code</link:label>
    <link:label id="lab_dei_EntityAddressPostalZipCode_label_en-US" xlink:label="lab_dei_EntityAddressPostalZipCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Address, Postal Zip Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode"/>
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    <link:label id="lab_ecd_RestatementDeterminationDate_terseLabel_en-US" xlink:label="lab_ecd_RestatementDeterminationDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restatement Determination Date</link:label>
    <link:label id="lab_ecd_RestatementDeterminationDate_label_en-US" xlink:label="lab_ecd_RestatementDeterminationDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restatement Determination Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_RestatementDeterminationDate" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_RestatementDeterminationDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_RestatementDeterminationDate" xlink:to="lab_ecd_RestatementDeterminationDate" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_019cc591-a891-769e-a9ef-a73dfff31023_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income tax expense (benefit)</link:label>
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_019cc591-a891-71ef-b2b6-77ccc3c988c8_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Income tax expense (benefit)</link:label>
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_label_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Expense (Benefit)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit" xlink:to="lab_us-gaap_IncomeTaxExpenseBenefit" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_UnpaidPrincipalBalanceMortgageServicingRightsSoldSubservicingRetained_019dd990-b599-7a1c-ac8d-e914dd504e34_terseLabel_en-US" xlink:label="lab_onit_UnpaidPrincipalBalanceMortgageServicingRightsSoldSubservicingRetained" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unpaid Principal Balance, Mortgage Servicing Rights Sold, Subservicing Retained</link:label>
    <link:label id="lab_onit_UnpaidPrincipalBalanceMortgageServicingRightsSoldSubservicingRetained_label_en-US" xlink:label="lab_onit_UnpaidPrincipalBalanceMortgageServicingRightsSoldSubservicingRetained" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unpaid Principal Balance, Mortgage Servicing Rights Sold, Subservicing Retained</link:label>
    <link:label id="lab_onit_UnpaidPrincipalBalanceMortgageServicingRightsSoldSubservicingRetained_documentation_en-US" xlink:label="lab_onit_UnpaidPrincipalBalanceMortgageServicingRightsSoldSubservicingRetained" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Unpaid Principal Balance, Mortgage Servicing Rights Sold, Subservicing Retained</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_UnpaidPrincipalBalanceMortgageServicingRightsSoldSubservicingRetained" xlink:href="onit-20260331.xsd#onit_UnpaidPrincipalBalanceMortgageServicingRightsSoldSubservicingRetained"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_UnpaidPrincipalBalanceMortgageServicingRightsSoldSubservicingRetained" xlink:to="lab_onit_UnpaidPrincipalBalanceMortgageServicingRightsSoldSubservicingRetained" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherAssets_019cc591-a891-7165-a0c9-cd6fa1718c9c_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherAssets" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other assets ($39.9 and $28.4 carried at fair value) ($100.4 and $83.4 related to VIEs)</link:label>
    <link:label id="lab_us-gaap_OtherAssets_019cc591-a891-79dc-af32-f5d83fca4adc_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other assets</link:label>
    <link:label id="lab_us-gaap_OtherAssets_019cc591-a891-7292-8557-61d5d5bc79cc_totalLabel_en-US" xlink:label="lab_us-gaap_OtherAssets" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Other Assets, Total</link:label>
    <link:label id="lab_us-gaap_OtherAssets_label_en-US" xlink:label="lab_us-gaap_OtherAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssets" xlink:to="lab_us-gaap_OtherAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToReceivablesNet_019cc591-a892-7cc0-9f3b-bbbb49a8a1b2_negatedTerseLabel_en-US" xlink:label="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToReceivablesNet" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Receivables, net</link:label>
    <link:label id="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToReceivablesNet_label_en-US" xlink:label="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToReceivablesNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers To Receivables Net</link:label>
    <link:label id="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToReceivablesNet_documentation_en-US" xlink:label="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToReceivablesNet" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This represents the amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy to receivables, net.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToReceivablesNet" xlink:href="onit-20260331.xsd#onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToReceivablesNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToReceivablesNet" xlink:to="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToReceivablesNet" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_019cc591-a808-7a08-b41f-2c97a2ed8e33_periodStartLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_019cc591-a808-72c6-8618-fa49617cf58b_periodEndLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PnsnAdjsSvcCstMember_terseLabel_en-US" xlink:label="lab_ecd_PnsnAdjsSvcCstMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pension Adjustments Service Cost</link:label>
    <link:label id="lab_ecd_PnsnAdjsSvcCstMember_label_en-US" xlink:label="lab_ecd_PnsnAdjsSvcCstMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pension Adjustments Service Cost [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PnsnAdjsSvcCstMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_PnsnAdjsSvcCstMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PnsnAdjsSvcCstMember" xlink:to="lab_ecd_PnsnAdjsSvcCstMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cc591-a808-77e4-8ba5-bbf351cf0ac6_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Axis]</link:label>
    <link:label id="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_label_en-US" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AncillaryFeesTransferredMSR_019cc591-a891-7938-a3b5-ac86c9da2f94_terseLabel_en-US" xlink:label="lab_onit_AncillaryFeesTransferredMSR" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ancillary fees - Transferred MSR</link:label>
    <link:label id="lab_onit_AncillaryFeesTransferredMSR_label_en-US" xlink:label="lab_onit_AncillaryFeesTransferredMSR" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ancillary fees - Transferred MSR</link:label>
    <link:label id="lab_onit_AncillaryFeesTransferredMSR_documentation_en-US" xlink:label="lab_onit_AncillaryFeesTransferredMSR" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ancillary fees - Transferred MSR</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AncillaryFeesTransferredMSR" xlink:href="onit-20260331.xsd#onit_AncillaryFeesTransferredMSR"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AncillaryFeesTransferredMSR" xlink:to="lab_onit_AncillaryFeesTransferredMSR" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_SubservicingAgreementNoticeOfNonRenewalPeriodPriorToExpiration_019df461-d45c-726b-91f9-4c00beaa3527_terseLabel_en-US" xlink:label="lab_onit_SubservicingAgreementNoticeOfNonRenewalPeriodPriorToExpiration" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subservicing Agreement, Notice Of Non-Renewal, Period Prior To Expiration</link:label>
    <link:label id="lab_onit_SubservicingAgreementNoticeOfNonRenewalPeriodPriorToExpiration_label_en-US" xlink:label="lab_onit_SubservicingAgreementNoticeOfNonRenewalPeriodPriorToExpiration" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subservicing Agreement, Notice Of Non-Renewal, Period Prior To Expiration</link:label>
    <link:label id="lab_onit_SubservicingAgreementNoticeOfNonRenewalPeriodPriorToExpiration_documentation_en-US" xlink:label="lab_onit_SubservicingAgreementNoticeOfNonRenewalPeriodPriorToExpiration" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Subservicing Agreement, Notice Of Non-Renewal, Period Prior To Expiration</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_SubservicingAgreementNoticeOfNonRenewalPeriodPriorToExpiration" xlink:href="onit-20260331.xsd#onit_SubservicingAgreementNoticeOfNonRenewalPeriodPriorToExpiration"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_SubservicingAgreementNoticeOfNonRenewalPeriodPriorToExpiration" xlink:to="lab_onit_SubservicingAgreementNoticeOfNonRenewalPeriodPriorToExpiration" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongTermPurchaseCommitmentTable_019cc591-a891-7c4a-8730-878fc4912ba4_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermPurchaseCommitmentTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term Purchase Commitment [Table]</link:label>
    <link:label id="lab_us-gaap_LongTermPurchaseCommitmentTable_label_en-US" xlink:label="lab_us-gaap_LongTermPurchaseCommitmentTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Purchase Commitment [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermPurchaseCommitmentTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable" xlink:to="lab_us-gaap_LongTermPurchaseCommitmentTable" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_GinnieMaeMortgageServicingRightsFinancingFacilityMember_019cc591-a808-79cc-92c9-62db29fe04e2_terseLabel_en-US" xlink:label="lab_onit_GinnieMaeMortgageServicingRightsFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ginnie Mae Mortgage Servicing Rights Financing Facility</link:label>
    <link:label id="lab_onit_GinnieMaeMortgageServicingRightsFinancingFacilityMember_label_en-US" xlink:label="lab_onit_GinnieMaeMortgageServicingRightsFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ginnie Mae Mortgage Servicing Rights Financing Facility [Member]</link:label>
    <link:label id="lab_onit_GinnieMaeMortgageServicingRightsFinancingFacilityMember_documentation_en-US" xlink:label="lab_onit_GinnieMaeMortgageServicingRightsFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ginnie Mae Mortgage Servicing Rights Financing Facility [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_GinnieMaeMortgageServicingRightsFinancingFacilityMember" xlink:href="onit-20260331.xsd#onit_GinnieMaeMortgageServicingRightsFinancingFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_GinnieMaeMortgageServicingRightsFinancingFacilityMember" xlink:to="lab_onit_GinnieMaeMortgageServicingRightsFinancingFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ContractuallySpecifiedServicingFeesAmount_019dd4c1-6372-7181-8247-09392b6e82c7_totalLabel_en-US" xlink:label="lab_us-gaap_ContractuallySpecifiedServicingFeesAmount" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Servicing fee on owned MSR</link:label>
    <link:label id="lab_us-gaap_ContractuallySpecifiedServicingFeesAmount_label_en-US" xlink:label="lab_us-gaap_ContractuallySpecifiedServicingFeesAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contractually Specified Servicing Fees, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractuallySpecifiedServicingFeesAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractuallySpecifiedServicingFeesAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractuallySpecifiedServicingFeesAmount" xlink:to="lab_us-gaap_ContractuallySpecifiedServicingFeesAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsToPurchaseLoansHeldForSale_019cc591-a891-77e6-bd26-dba87577f40c_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToPurchaseLoansHeldForSale" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Origination and purchase of loans held for sale</link:label>
    <link:label id="lab_us-gaap_PaymentsToPurchaseLoansHeldForSale_label_en-US" xlink:label="lab_us-gaap_PaymentsToPurchaseLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payment for Purchase, Loan, Held-for-Sale</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToPurchaseLoansHeldForSale" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToPurchaseLoansHeldForSale"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToPurchaseLoansHeldForSale" xlink:to="lab_us-gaap_PaymentsToPurchaseLoansHeldForSale" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_SubservicingAssetUnpaidPrincipalBalanceAmountDerecognition_019dd993-3c97-7df7-a23c-97f7eb38c154_terseLabel_en-US" xlink:label="lab_onit_SubservicingAssetUnpaidPrincipalBalanceAmountDerecognition" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subservicing Unpaid Principal Balance, Amount, Derecognition</link:label>
    <link:label id="lab_onit_SubservicingAssetUnpaidPrincipalBalanceAmountDerecognition_label_en-US" xlink:label="lab_onit_SubservicingAssetUnpaidPrincipalBalanceAmountDerecognition" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subservicing Asset, Unpaid Principal Balance, Amount, Derecognition</link:label>
    <link:label id="lab_onit_SubservicingAssetUnpaidPrincipalBalanceAmountDerecognition_documentation_en-US" xlink:label="lab_onit_SubservicingAssetUnpaidPrincipalBalanceAmountDerecognition" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Subservicing Asset, Unpaid Principal Balance, Amount, Derecognition</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_SubservicingAssetUnpaidPrincipalBalanceAmountDerecognition" xlink:href="onit-20260331.xsd#onit_SubservicingAssetUnpaidPrincipalBalanceAmountDerecognition"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_SubservicingAssetUnpaidPrincipalBalanceAmountDerecognition" xlink:to="lab_onit_SubservicingAssetUnpaidPrincipalBalanceAmountDerecognition" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesUnSecuritizedLoans_019cc591-a808-7694-9677-2bc42e6ae452_terseLabel_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesUnSecuritizedLoans" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unsecuritized loans</link:label>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesUnSecuritizedLoans_label_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesUnSecuritizedLoans" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Investment, Reverse Mortgages, Un Securitized Loans</link:label>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesUnSecuritizedLoans_documentation_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesUnSecuritizedLoans" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of un securitized loans held for investment, reverse mortgages.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForInvestmentReverseMortgagesUnSecuritizedLoans" xlink:href="onit-20260331.xsd#onit_LoansHeldForInvestmentReverseMortgagesUnSecuritizedLoans"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForInvestmentReverseMortgagesUnSecuritizedLoans" xlink:to="lab_onit_LoansHeldForInvestmentReverseMortgagesUnSecuritizedLoans" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromSecuritizationsOfLoansHeldForSale_019cc591-a75e-7fec-99d6-4025cf10cbd2_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSecuritizationsOfLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds received from securitizations</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSecuritizationsOfLoansHeldForSale_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSecuritizationsOfLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Securitization, Loan, Held-for-Sale</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSecuritizationsOfLoansHeldForSale" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromSecuritizationsOfLoansHeldForSale"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSecuritizationsOfLoansHeldForSale" xlink:to="lab_us-gaap_ProceedsFromSecuritizationsOfLoansHeldForSale" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionTableTextBlock_019cc591-a808-7b0a-b956-fb1e2ef727c1_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument Redemption</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionTableTextBlock_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument Redemption [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionTableTextBlock" xlink:to="lab_us-gaap_DebtInstrumentRedemptionTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherIncomeAndExpensesAbstract_019cc591-a808-7635-af33-1dc13b097b19_terseLabel_en-US" xlink:label="lab_us-gaap_OtherIncomeAndExpensesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Income and Expenses [Abstract]</link:label>
    <link:label id="lab_us-gaap_OtherIncomeAndExpensesAbstract_label_en-US" xlink:label="lab_us-gaap_OtherIncomeAndExpensesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Income and Expenses [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIncomeAndExpensesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherIncomeAndExpensesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherIncomeAndExpensesAbstract" xlink:to="lab_us-gaap_OtherIncomeAndExpensesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock_terseLabel_en-US" xlink:label="lab_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Compensation Actually Paid vs. Company Selected Measure</link:label>
    <link:label id="lab_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock_label_en-US" xlink:label="lab_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Compensation Actually Paid vs. Company Selected Measure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock" xlink:to="lab_ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeTaxPaidFederalAfterRefundReceived_019cc591-a75f-7214-85a9-6905dd79b894_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxPaidFederalAfterRefundReceived" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal</link:label>
    <link:label id="lab_us-gaap_IncomeTaxPaidFederalAfterRefundReceived_label_en-US" xlink:label="lab_us-gaap_IncomeTaxPaidFederalAfterRefundReceived" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Paid, Federal, after Refund Received</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidFederalAfterRefundReceived" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxPaidFederalAfterRefundReceived"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxPaidFederalAfterRefundReceived" xlink:to="lab_us-gaap_IncomeTaxPaidFederalAfterRefundReceived" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AllTradingArrangementsMember_terseLabel_en-US" xlink:label="lab_ecd_AllTradingArrangementsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">All Trading Arrangements</link:label>
    <link:label id="lab_ecd_AllTradingArrangementsMember_label_en-US" xlink:label="lab_ecd_AllTradingArrangementsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">All Trading Arrangements [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllTradingArrangementsMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AllTradingArrangementsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AllTradingArrangementsMember" xlink:to="lab_ecd_AllTradingArrangementsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_EqtyAwrdsAdjFnTextBlock_terseLabel_en-US" xlink:label="lab_ecd_EqtyAwrdsAdjFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Awards Adjustments, Footnote</link:label>
    <link:label id="lab_ecd_EqtyAwrdsAdjFnTextBlock_label_en-US" xlink:label="lab_ecd_EqtyAwrdsAdjFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Awards Adjustments, Footnote [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_EqtyAwrdsAdjFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_EqtyAwrdsAdjFnTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_EqtyAwrdsAdjFnTextBlock" xlink:to="lab_ecd_EqtyAwrdsAdjFnTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TotalShareholderRtnVsPeerGroupTextBlock_terseLabel_en-US" xlink:label="lab_ecd_TotalShareholderRtnVsPeerGroupTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Shareholder Return Vs Peer Group</link:label>
    <link:label id="lab_ecd_TotalShareholderRtnVsPeerGroupTextBlock_label_en-US" xlink:label="lab_ecd_TotalShareholderRtnVsPeerGroupTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Shareholder Return Vs Peer Group [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TotalShareholderRtnVsPeerGroupTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_TotalShareholderRtnVsPeerGroupTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TotalShareholderRtnVsPeerGroupTextBlock" xlink:to="lab_ecd_TotalShareholderRtnVsPeerGroupTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPricePercentage_019cc591-a75e-7b5e-a9bb-f87df74bec74_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPricePercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Redemption price</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPricePercentage_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPricePercentage" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption Price, Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPricePercentage" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPricePercentage" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsToAcquireMortgageServicingRightsMSR_019cc591-a808-7f0b-a5b2-98a4d8c6a44c_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireMortgageServicingRightsMSR" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Purchase of MSRs</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireMortgageServicingRightsMSR_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireMortgageServicingRightsMSR" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Mortgage Servicing Rights (MSR)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireMortgageServicingRightsMSR" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireMortgageServicingRightsMSR"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireMortgageServicingRightsMSR" xlink:to="lab_us-gaap_PaymentsToAcquireMortgageServicingRightsMSR" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants_019cc591-a75f-72f7-96a1-7c9765fe8193_terseLabel_en-US" xlink:label="lab_us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock warrants (in shares)</link:label>
    <link:label id="lab_us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants_label_en-US" xlink:label="lab_us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants" xlink:to="lab_us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ESSFinancingLiabilitiesMember_019cc591-a891-7c88-b785-ff47b5609ca5_terseLabel_en-US" xlink:label="lab_onit_ESSFinancingLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ESS Financing Liabilities</link:label>
    <link:label id="lab_onit_ESSFinancingLiabilitiesMember_label_en-US" xlink:label="lab_onit_ESSFinancingLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">ESS Financing Liabilities [Member]</link:label>
    <link:label id="lab_onit_ESSFinancingLiabilitiesMember_documentation_en-US" xlink:label="lab_onit_ESSFinancingLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">ESS Financing Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ESSFinancingLiabilitiesMember" xlink:href="onit-20260331.xsd#onit_ESSFinancingLiabilitiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ESSFinancingLiabilitiesMember" xlink:to="lab_onit_ESSFinancingLiabilitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cc591-a891-7df1-be5d-620dec7d0639_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash used in operating activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Provided by (Used in) Operating Activity, Including Discontinued Operation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ReceivablesFromSaleOfMortgageServicingRights_019cc591-a808-7f2f-a152-df1b237e7f69_terseLabel_en-US" xlink:label="lab_onit_ReceivablesFromSaleOfMortgageServicingRights" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Receivable from sale of MSRs (holdback)</link:label>
    <link:label id="lab_onit_ReceivablesFromSaleOfMortgageServicingRights_label_en-US" xlink:label="lab_onit_ReceivablesFromSaleOfMortgageServicingRights" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Receivables from Sale of Mortgage Servicing Rights</link:label>
    <link:label id="lab_onit_ReceivablesFromSaleOfMortgageServicingRights_documentation_en-US" xlink:label="lab_onit_ReceivablesFromSaleOfMortgageServicingRights" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Receivables from sale of mortgage servicing rights.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ReceivablesFromSaleOfMortgageServicingRights" xlink:href="onit-20260331.xsd#onit_ReceivablesFromSaleOfMortgageServicingRights"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ReceivablesFromSaleOfMortgageServicingRights" xlink:to="lab_onit_ReceivablesFromSaleOfMortgageServicingRights" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_RegulatoryRequirementsTextBlock_019cc591-a891-7e70-a0c3-2048525a51b5_terseLabel_en-US" xlink:label="lab_onit_RegulatoryRequirementsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Regulatory Requirements</link:label>
    <link:label id="lab_onit_RegulatoryRequirementsTextBlock_label_en-US" xlink:label="lab_onit_RegulatoryRequirementsTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Regulatory Requirements [Text Block]</link:label>
    <link:label id="lab_onit_RegulatoryRequirementsTextBlock_documentation_en-US" xlink:label="lab_onit_RegulatoryRequirementsTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Description of regulatory oversight by federal, state, local and foreign governmental authorities that apply to the business.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_RegulatoryRequirementsTextBlock" xlink:href="onit-20260331.xsd#onit_RegulatoryRequirementsTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_RegulatoryRequirementsTextBlock" xlink:to="lab_onit_RegulatoryRequirementsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_019cc591-a75f-77a6-ad56-0320842fb6c6_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Sales</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsequentEventMember_019dd4ef-57d6-7208-b754-01688ddf2beb_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event</link:label>
    <link:label id="lab_us-gaap_SubsequentEventMember_label_en-US" xlink:label="lab_us-gaap_SubsequentEventMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventMember" xlink:to="lab_us-gaap_SubsequentEventMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_EquityValuationAssumptionDifferenceFnTextBlock_terseLabel_en-US" xlink:label="lab_ecd_EquityValuationAssumptionDifferenceFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Valuation Assumption Difference, Footnote</link:label>
    <link:label id="lab_ecd_EquityValuationAssumptionDifferenceFnTextBlock_label_en-US" xlink:label="lab_ecd_EquityValuationAssumptionDifferenceFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Valuation Assumption Difference, Footnote [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_EquityValuationAssumptionDifferenceFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_EquityValuationAssumptionDifferenceFnTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_EquityValuationAssumptionDifferenceFnTextBlock" xlink:to="lab_ecd_EquityValuationAssumptionDifferenceFnTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PeoTotalCompAmt_terseLabel_en-US" xlink:label="lab_ecd_PeoTotalCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PEO Total Compensation Amount</link:label>
    <link:label id="lab_ecd_PeoTotalCompAmt_label_en-US" xlink:label="lab_ecd_PeoTotalCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PEO Total Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeoTotalCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_PeoTotalCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PeoTotalCompAmt" xlink:to="lab_ecd_PeoTotalCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongtermDebtTypeAxis_019cc591-a808-706f-9d93-4577d7864134_terseLabel_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term Debt, Type [Axis]</link:label>
    <link:label id="lab_us-gaap_LongtermDebtTypeAxis_label_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Debt, Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongtermDebtTypeAxis" xlink:to="lab_us-gaap_LongtermDebtTypeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_019cc591-a891-75fa-bb20-e1e6e8c35eab_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodThreeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2028 and thereafter</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodThreeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period Three [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodThreeMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodThreeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodThreeMember" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodThreeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeLiability_019cc591-a808-77f2-bda9-92d07238e55d_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Derivative liability, fair value</link:label>
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeLiability_label_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Liability, Subject to Master Netting Arrangement, before Offset</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:to="lab_us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherLiabilitiesDisclosureTextBlock_019cc591-a75e-7c3b-a7be-330162656ff3_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Liabilities</link:label>
    <link:label id="lab_us-gaap_OtherLiabilitiesDisclosureTextBlock_label_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Liabilities Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLiabilitiesDisclosureTextBlock" xlink:to="lab_us-gaap_OtherLiabilitiesDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StatementEquityComponentsAxis_019cc591-a808-7ef3-83c3-d342dad61f33_terseLabel_en-US" xlink:label="lab_us-gaap_StatementEquityComponentsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Components [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementEquityComponentsAxis_label_en-US" xlink:label="lab_us-gaap_StatementEquityComponentsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Components [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementEquityComponentsAxis" xlink:to="lab_us-gaap_StatementEquityComponentsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ProceedsFromExcessServicingSpreadFinancing_019cc591-a808-7930-9801-16b9564446c9_terseLabel_en-US" xlink:label="lab_onit_ProceedsFromExcessServicingSpreadFinancing" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from MSR related financing liabilities</link:label>
    <link:label id="lab_onit_ProceedsFromExcessServicingSpreadFinancing_label_en-US" xlink:label="lab_onit_ProceedsFromExcessServicingSpreadFinancing" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds From Excess Servicing Spread Financing</link:label>
    <link:label id="lab_onit_ProceedsFromExcessServicingSpreadFinancing_documentation_en-US" xlink:label="lab_onit_ProceedsFromExcessServicingSpreadFinancing" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Proceeds From Excess Servicing Spread Financing</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ProceedsFromExcessServicingSpreadFinancing" xlink:href="onit-20260331.xsd#onit_ProceedsFromExcessServicingSpreadFinancing"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ProceedsFromExcessServicingSpreadFinancing" xlink:to="lab_onit_ProceedsFromExcessServicingSpreadFinancing" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_NonRule10b51ArrAdoptedFlag_terseLabel_en-US" xlink:label="lab_ecd_NonRule10b51ArrAdoptedFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-Rule 10b5-1 Arrangement Adopted</link:label>
    <link:label id="lab_ecd_NonRule10b51ArrAdoptedFlag_label_en-US" xlink:label="lab_ecd_NonRule10b51ArrAdoptedFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-Rule 10b5-1 Arrangement Adopted [Flag]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonRule10b51ArrAdoptedFlag" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_NonRule10b51ArrAdoptedFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_NonRule10b51ArrAdoptedFlag" xlink:to="lab_ecd_NonRule10b51ArrAdoptedFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_EarningsPerShareBasicAndDiluted1Abstract_019cc591-a808-763f-8042-74106bb09fce_terseLabel_en-US" xlink:label="lab_onit_EarningsPerShareBasicAndDiluted1Abstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Earnings per share attributable to common stockholders</link:label>
    <link:label id="lab_onit_EarningsPerShareBasicAndDiluted1Abstract_label_en-US" xlink:label="lab_onit_EarningsPerShareBasicAndDiluted1Abstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share Basic And Diluted1 [Abstract]</link:label>
    <link:label id="lab_onit_EarningsPerShareBasicAndDiluted1Abstract_documentation_en-US" xlink:label="lab_onit_EarningsPerShareBasicAndDiluted1Abstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Earnings Per Share Basic And Diluted1</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_EarningsPerShareBasicAndDiluted1Abstract" xlink:href="onit-20260331.xsd#onit_EarningsPerShareBasicAndDiluted1Abstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_EarningsPerShareBasicAndDiluted1Abstract" xlink:to="lab_onit_EarningsPerShareBasicAndDiluted1Abstract" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_TotalLiquidity_019cc591-a75f-7b1c-b25a-943b20caa50c_terseLabel_en-US" xlink:label="lab_onit_TotalLiquidity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Liquidity</link:label>
    <link:label id="lab_onit_TotalLiquidity_label_en-US" xlink:label="lab_onit_TotalLiquidity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Liquidity</link:label>
    <link:label id="lab_onit_TotalLiquidity_documentation_en-US" xlink:label="lab_onit_TotalLiquidity" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total Liquidity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_TotalLiquidity" xlink:href="onit-20260331.xsd#onit_TotalLiquidity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_TotalLiquidity" xlink:to="lab_onit_TotalLiquidity" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_RepaymentOfServicingLiability_019dd4f3-32c1-75d4-8314-c57239a5b4e2_terseLabel_en-US" xlink:label="lab_onit_RepaymentOfServicingLiability" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Repayment Of Servicing Liability</link:label>
    <link:label id="lab_onit_RepaymentOfServicingLiability_label_en-US" xlink:label="lab_onit_RepaymentOfServicingLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repayment Of Servicing Liability</link:label>
    <link:label id="lab_onit_RepaymentOfServicingLiability_documentation_en-US" xlink:label="lab_onit_RepaymentOfServicingLiability" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Repayment Of Servicing Liability</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_RepaymentOfServicingLiability" xlink:href="onit-20260331.xsd#onit_RepaymentOfServicingLiability"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_RepaymentOfServicingLiability" xlink:to="lab_onit_RepaymentOfServicingLiability" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestAndOtherIncome_019cc591-a891-7048-a2b3-399ac9d8f2fe_terseLabel_en-US" xlink:label="lab_us-gaap_InterestAndOtherIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest income</link:label>
    <link:label id="lab_us-gaap_InterestAndOtherIncome_label_en-US" xlink:label="lab_us-gaap_InterestAndOtherIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest and Other Income</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndOtherIncome" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndOtherIncome"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestAndOtherIncome" xlink:to="lab_us-gaap_InterestAndOtherIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans_019cc591-a891-7c5d-b44c-9522a1a1e9bf_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sale of real estate</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Wholly Owned Real Estate and Real Estate Acquired in Settlement of Loans</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans" xlink:to="lab_us-gaap_ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressStateOrProvince_019cc591-a75e-7b9f-bd03-3ad9d8ce3137_terseLabel_en-US" xlink:label="lab_dei_EntityAddressStateOrProvince" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, State or Province</link:label>
    <link:label id="lab_dei_EntityAddressStateOrProvince_label_en-US" xlink:label="lab_dei_EntityAddressStateOrProvince" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Address, State or Province</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressStateOrProvince" xlink:to="lab_dei_EntityAddressStateOrProvince" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_RecognitionofLeaseLiability_019cc591-a891-7266-95a8-569dd4d679e0_terseLabel_en-US" xlink:label="lab_onit_RecognitionofLeaseLiability" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Lease liability</link:label>
    <link:label id="lab_onit_RecognitionofLeaseLiability_label_en-US" xlink:label="lab_onit_RecognitionofLeaseLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Recognition of Lease Liability</link:label>
    <link:label id="lab_onit_RecognitionofLeaseLiability_documentation_en-US" xlink:label="lab_onit_RecognitionofLeaseLiability" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Recognition of lease liability.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_RecognitionofLeaseLiability" xlink:href="onit-20260331.xsd#onit_RecognitionofLeaseLiability"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_RecognitionofLeaseLiability" xlink:to="lab_onit_RecognitionofLeaseLiability" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent_019cc591-a891-7aab-adc7-fb8d8e43f514_terseLabel_en-US" xlink:label="lab_us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liability for unfunded pension obligation and gratuity plans</link:label>
    <link:label id="lab_us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent_label_en-US" xlink:label="lab_us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability, Other Postretirement Defined Benefit Plan, Noncurrent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent" xlink:to="lab_us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cc591-a808-7918-b226-16d7bba9aac5_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivablesPeriodPastDueDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Asset, Aging [Domain]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivablesPeriodPastDueDomain_label_en-US" xlink:label="lab_us-gaap_FinancingReceivablesPeriodPastDueDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Asset, Aging [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain" xlink:to="lab_us-gaap_FinancingReceivablesPeriodPastDueDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019cc591-a892-7f1a-9df7-7c51c09340e1_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Antidilutive Security, Excluded EPS Calculation [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Antidilutive Security, Excluded EPS Calculation [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:to="lab_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ServicingAsset_019cc591-a808-7eb2-995f-eae0036c96f7_terseLabel_en-US" xlink:label="lab_us-gaap_ServicingAsset" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mortgage servicing rights (MSRs), at fair value</link:label>
    <link:label id="lab_us-gaap_ServicingAsset_019cc591-a808-7a61-a9e2-3e08893fa8c7_verboseLabel_en-US" xlink:label="lab_us-gaap_ServicingAsset" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Servicing Asset</link:label>
    <link:label id="lab_us-gaap_ServicingAsset_label_en-US" xlink:label="lab_us-gaap_ServicingAsset" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAsset" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAsset"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingAsset" xlink:to="lab_us-gaap_ServicingAsset" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ExcessServicingFeesSpreadPayable_019cc591-a891-7d0f-a483-a450a424e822_terseLabel_en-US" xlink:label="lab_onit_ExcessServicingFeesSpreadPayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Excess servicing fee spread payable</link:label>
    <link:label id="lab_onit_ExcessServicingFeesSpreadPayable_label_en-US" xlink:label="lab_onit_ExcessServicingFeesSpreadPayable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Excess Servicing Fees Spread payable</link:label>
    <link:label id="lab_onit_ExcessServicingFeesSpreadPayable_documentation_en-US" xlink:label="lab_onit_ExcessServicingFeesSpreadPayable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Excess Servicing Fees Spread payable on ESS Financing Liability.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ExcessServicingFeesSpreadPayable" xlink:href="onit-20260331.xsd#onit_ExcessServicingFeesSpreadPayable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ExcessServicingFeesSpreadPayable" xlink:to="lab_onit_ExcessServicingFeesSpreadPayable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LoansReceivableFairValueDisclosure_019cc591-a891-7f25-9bf9-f3507ceb595a_terseLabel_en-US" xlink:label="lab_us-gaap_LoansReceivableFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans held for investment, at fair value</link:label>
    <link:label id="lab_us-gaap_LoansReceivableFairValueDisclosure_label_en-US" xlink:label="lab_us-gaap_LoansReceivableFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Receivable, Fair Value Disclosure</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansReceivableFairValueDisclosure" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansReceivableFairValueDisclosure"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansReceivableFairValueDisclosure" xlink:to="lab_us-gaap_LoansReceivableFairValueDisclosure" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount_019cc591-a892-779b-93cf-b14c84d4b50c_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available borrowing capacity</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Unused Borrowing Capacity, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount" xlink:to="lab_us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_019cc591-a75f-77a3-a936-a3e593217069_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term Purchase Commitment, Category of Item Purchased [Domain]</link:label>
    <link:label id="lab_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_label_en-US" xlink:label="lab_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Purchase Commitment, Category of Item Purchased [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain" xlink:to="lab_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_IndividualAxis_terseLabel_en-US" xlink:label="lab_ecd_IndividualAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Individual:</link:label>
    <link:label id="lab_ecd_IndividualAxis_label_en-US" xlink:label="lab_ecd_IndividualAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Individual [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_IndividualAxis" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_IndividualAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_IndividualAxis" xlink:to="lab_ecd_IndividualAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoandsHeldForInvestmentReverseMortgageOtherChangeInFairValue_019cc591-a75f-77d6-9e55-b3b197483237_terseLabel_en-US" xlink:label="lab_onit_LoandsHeldForInvestmentReverseMortgageOtherChangeInFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other change in fair value of securitized loans and HMBS-related borrowings, net</link:label>
    <link:label id="lab_onit_LoandsHeldForInvestmentReverseMortgageOtherChangeInFairValue_label_en-US" xlink:label="lab_onit_LoandsHeldForInvestmentReverseMortgageOtherChangeInFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loands Held For Investment, Reverse Mortgage, Other Change In Fair Value</link:label>
    <link:label id="lab_onit_LoandsHeldForInvestmentReverseMortgageOtherChangeInFairValue_documentation_en-US" xlink:label="lab_onit_LoandsHeldForInvestmentReverseMortgageOtherChangeInFairValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loands Held For Investment, Reverse Mortgage, Other Change In Fair Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoandsHeldForInvestmentReverseMortgageOtherChangeInFairValue" xlink:href="onit-20260331.xsd#onit_LoandsHeldForInvestmentReverseMortgageOtherChangeInFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoandsHeldForInvestmentReverseMortgageOtherChangeInFairValue" xlink:to="lab_onit_LoandsHeldForInvestmentReverseMortgageOtherChangeInFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansReceivableFairValueDisclosurePendingPooling_019dd4fb-d41c-7095-8e92-46317e31a34e_terseLabel_en-US" xlink:label="lab_onit_LoansReceivableFairValueDisclosurePendingPooling" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans Receivable, Fair Value Disclosure, Pending Pooling</link:label>
    <link:label id="lab_onit_LoansReceivableFairValueDisclosurePendingPooling_label_en-US" xlink:label="lab_onit_LoansReceivableFairValueDisclosurePendingPooling" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Receivable, Fair Value Disclosure, Pending Pooling</link:label>
    <link:label id="lab_onit_LoansReceivableFairValueDisclosurePendingPooling_documentation_en-US" xlink:label="lab_onit_LoansReceivableFairValueDisclosurePendingPooling" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Receivable, Fair Value Disclosure, Pending Pooling</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansReceivableFairValueDisclosurePendingPooling" xlink:href="onit-20260331.xsd#onit_LoansReceivableFairValueDisclosurePendingPooling"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansReceivableFairValueDisclosurePendingPooling" xlink:to="lab_onit_LoansReceivableFairValueDisclosurePendingPooling" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInLoansHeldForSale_019cc591-a891-7cda-8c26-5dd0c768fd14_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair value gain (loss) on loans held for sale, at fair value (2)</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInLoansHeldForSale_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Loan, Held-for-Sale</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInLoansHeldForSale" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInLoansHeldForSale"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInLoansHeldForSale" xlink:to="lab_us-gaap_IncreaseDecreaseInLoansHeldForSale" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_DebtInstrumentRemainingBorrowingCapacityUncommitedAmount_019cc591-a808-7fea-a530-0d27d142c37e_terseLabel_en-US" xlink:label="lab_onit_DebtInstrumentRemainingBorrowingCapacityUncommitedAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Remaining Borrowing Capacity, Uncommited Amount</link:label>
    <link:label id="lab_onit_DebtInstrumentRemainingBorrowingCapacityUncommitedAmount_label_en-US" xlink:label="lab_onit_DebtInstrumentRemainingBorrowingCapacityUncommitedAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Remaining Borrowing Capacity, Uncommited Amount</link:label>
    <link:label id="lab_onit_DebtInstrumentRemainingBorrowingCapacityUncommitedAmount_documentation_en-US" xlink:label="lab_onit_DebtInstrumentRemainingBorrowingCapacityUncommitedAmount" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instrument, Remaining Borrowing Capacity, Uncommited Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_DebtInstrumentRemainingBorrowingCapacityUncommitedAmount" xlink:href="onit-20260331.xsd#onit_DebtInstrumentRemainingBorrowingCapacityUncommitedAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_DebtInstrumentRemainingBorrowingCapacityUncommitedAmount" xlink:to="lab_onit_DebtInstrumentRemainingBorrowingCapacityUncommitedAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingAndSubservicingFeesOwnedMSR_019cc591-a75f-746a-9d25-118af80d97cf_terseLabel_en-US" xlink:label="lab_onit_ServicingAndSubservicingFeesOwnedMSR" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing and Subservicing Fees, Owned MSR</link:label>
    <link:label id="lab_onit_ServicingAndSubservicingFeesOwnedMSR_label_en-US" xlink:label="lab_onit_ServicingAndSubservicingFeesOwnedMSR" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing and Subservicing Fees, Owned MSR</link:label>
    <link:label id="lab_onit_ServicingAndSubservicingFeesOwnedMSR_documentation_en-US" xlink:label="lab_onit_ServicingAndSubservicingFeesOwnedMSR" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing and Subservicing Fees, Owned MSR</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingAndSubservicingFeesOwnedMSR" xlink:href="onit-20260331.xsd#onit_ServicingAndSubservicingFeesOwnedMSR"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingAndSubservicingFeesOwnedMSR" xlink:to="lab_onit_ServicingAndSubservicingFeesOwnedMSR" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_TransferredMSRSubjectToPledgedLiabilityMember_019cc591-a891-7acf-a731-86e523b51518_terseLabel_en-US" xlink:label="lab_onit_TransferredMSRSubjectToPledgedLiabilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Transferred MSR, Subject To Pledged Liability</link:label>
    <link:label id="lab_onit_TransferredMSRSubjectToPledgedLiabilityMember_label_en-US" xlink:label="lab_onit_TransferredMSRSubjectToPledgedLiabilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Transferred MSR, Subject To Pledged Liability [Member]</link:label>
    <link:label id="lab_onit_TransferredMSRSubjectToPledgedLiabilityMember_documentation_en-US" xlink:label="lab_onit_TransferredMSRSubjectToPledgedLiabilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Transferred MSR, Subject To Pledged Liability</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_TransferredMSRSubjectToPledgedLiabilityMember" xlink:href="onit-20260331.xsd#onit_TransferredMSRSubjectToPledgedLiabilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_TransferredMSRSubjectToPledgedLiabilityMember" xlink:to="lab_onit_TransferredMSRSubjectToPledgedLiabilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ForgoneRecoveryExplanationOfImpracticabilityTextBlock_terseLabel_en-US" xlink:label="lab_ecd_ForgoneRecoveryExplanationOfImpracticabilityTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Forgone Recovery, Explanation of Impracticability</link:label>
    <link:label id="lab_ecd_ForgoneRecoveryExplanationOfImpracticabilityTextBlock_label_en-US" xlink:label="lab_ecd_ForgoneRecoveryExplanationOfImpracticabilityTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Forgone Recovery, Explanation of Impracticability [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ForgoneRecoveryExplanationOfImpracticabilityTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_ForgoneRecoveryExplanationOfImpracticabilityTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_ForgoneRecoveryExplanationOfImpracticabilityTextBlock" xlink:to="lab_ecd_ForgoneRecoveryExplanationOfImpracticabilityTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LossContingencyDisclosures_019cc591-a808-77f0-b189-318a7385c322_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingencyDisclosures" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contingencies</link:label>
    <link:label id="lab_us-gaap_LossContingencyDisclosures_label_en-US" xlink:label="lab_us-gaap_LossContingencyDisclosures" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contingencies Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyDisclosures" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingencyDisclosures"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingencyDisclosures" xlink:to="lab_us-gaap_LossContingencyDisclosures" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ContractuallySpecifiedServicingFeeAndTransferredMortgageServicingRights_019dd400-475a-7837-909b-db20cd6a9573_terseLabel_en-US" xlink:label="lab_onit_ContractuallySpecifiedServicingFeeAndTransferredMortgageServicingRights" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing fee on transferred MSR</link:label>
    <link:label id="lab_onit_ContractuallySpecifiedServicingFeeAndTransferredMortgageServicingRights_label_en-US" xlink:label="lab_onit_ContractuallySpecifiedServicingFeeAndTransferredMortgageServicingRights" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contractually Specified Servicing Fee and Transferred Mortgage Servicing Rights</link:label>
    <link:label id="lab_onit_ContractuallySpecifiedServicingFeeAndTransferredMortgageServicingRights_documentation_en-US" xlink:label="lab_onit_ContractuallySpecifiedServicingFeeAndTransferredMortgageServicingRights" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Contractually Specified Servicing Fee and Transferred Mortgage Servicing Rights</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ContractuallySpecifiedServicingFeeAndTransferredMortgageServicingRights" xlink:href="onit-20260331.xsd#onit_ContractuallySpecifiedServicingFeeAndTransferredMortgageServicingRights"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ContractuallySpecifiedServicingFeeAndTransferredMortgageServicingRights" xlink:to="lab_onit_ContractuallySpecifiedServicingFeeAndTransferredMortgageServicingRights" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityInteractiveDataCurrent_019cc591-a892-7f5f-badb-3cf4baa7efee_terseLabel_en-US" xlink:label="lab_dei_EntityInteractiveDataCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Interactive Data Current</link:label>
    <link:label id="lab_dei_EntityInteractiveDataCurrent_label_en-US" xlink:label="lab_dei_EntityInteractiveDataCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Interactive Data Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityInteractiveDataCurrent" xlink:to="lab_dei_EntityInteractiveDataCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForSaleFairValueMember_019cc591-a75e-7dcc-b6c4-d7238275cbab_terseLabel_en-US" xlink:label="lab_onit_LoansHeldForSaleFairValueMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans Held for Sale - Fair Value</link:label>
    <link:label id="lab_onit_LoansHeldForSaleFairValueMember_label_en-US" xlink:label="lab_onit_LoansHeldForSaleFairValueMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held-For-Sale, Fair Value [Member]</link:label>
    <link:label id="lab_onit_LoansHeldForSaleFairValueMember_documentation_en-US" xlink:label="lab_onit_LoansHeldForSaleFairValueMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Held-For-Sale, Fair Value [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForSaleFairValueMember" xlink:href="onit-20260331.xsd#onit_LoansHeldForSaleFairValueMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForSaleFairValueMember" xlink:to="lab_onit_LoansHeldForSaleFairValueMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ScheduleOfMatchFundedLiabilitiesTableTextBlock_019cc591-a891-7b1c-a206-20ec99e9f74b_terseLabel_en-US" xlink:label="lab_onit_ScheduleOfMatchFundedLiabilitiesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Match Funded Liabilities</link:label>
    <link:label id="lab_onit_ScheduleOfMatchFundedLiabilitiesTableTextBlock_label_en-US" xlink:label="lab_onit_ScheduleOfMatchFundedLiabilitiesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Match Funded Liabilities [Table Text Block]</link:label>
    <link:label id="lab_onit_ScheduleOfMatchFundedLiabilitiesTableTextBlock_documentation_en-US" xlink:label="lab_onit_ScheduleOfMatchFundedLiabilitiesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule Of Match Funded Liabilities [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ScheduleOfMatchFundedLiabilitiesTableTextBlock" xlink:href="onit-20260331.xsd#onit_ScheduleOfMatchFundedLiabilitiesTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ScheduleOfMatchFundedLiabilitiesTableTextBlock" xlink:to="lab_onit_ScheduleOfMatchFundedLiabilitiesTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_GainsLossesOnSalesOfOtherRealEstate_019cc591-a891-7723-94f6-e2eaef44864d_terseLabel_en-US" xlink:label="lab_us-gaap_GainsLossesOnSalesOfOtherRealEstate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_GainsLossesOnSalesOfOtherRealEstate_label_en-US" xlink:label="lab_us-gaap_GainsLossesOnSalesOfOtherRealEstate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gains (Losses) on Sales of Other Real Estate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnSalesOfOtherRealEstate" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainsLossesOnSalesOfOtherRealEstate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainsLossesOnSalesOfOtherRealEstate" xlink:to="lab_us-gaap_GainsLossesOnSalesOfOtherRealEstate" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesFairValueChanges_019cc591-a75e-7705-bcda-17d024172c2c_terseLabel_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesFairValueChanges" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in fair value</link:label>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesFairValueChanges_label_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesFairValueChanges" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Investment, Reverse Mortgages, Fair Value Changes</link:label>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesFairValueChanges_documentation_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesFairValueChanges" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Change in fair value of loans held for investment, reverse mortgages during the period.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForInvestmentReverseMortgagesFairValueChanges" xlink:href="onit-20260331.xsd#onit_LoansHeldForInvestmentReverseMortgagesFairValueChanges"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForInvestmentReverseMortgagesFairValueChanges" xlink:to="lab_onit_LoansHeldForInvestmentReverseMortgagesFairValueChanges" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_MinimumLiquidityRequiredForCompliance_019cc591-a808-7917-a34f-a6b5206d3ee1_terseLabel_en-US" xlink:label="lab_onit_MinimumLiquidityRequiredForCompliance" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restrictive liquidity requirements</link:label>
    <link:label id="lab_onit_MinimumLiquidityRequiredForCompliance_label_en-US" xlink:label="lab_onit_MinimumLiquidityRequiredForCompliance" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Minimum Liquidity Required for Compliance</link:label>
    <link:label id="lab_onit_MinimumLiquidityRequiredForCompliance_documentation_en-US" xlink:label="lab_onit_MinimumLiquidityRequiredForCompliance" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Minimum Liquidity Required for Compliance</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_MinimumLiquidityRequiredForCompliance" xlink:href="onit-20260331.xsd#onit_MinimumLiquidityRequiredForCompliance"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_MinimumLiquidityRequiredForCompliance" xlink:to="lab_onit_MinimumLiquidityRequiredForCompliance" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LienCategoryAxis_019cc591-a891-7dd2-8d76-14a2040fb52c_terseLabel_en-US" xlink:label="lab_us-gaap_LienCategoryAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Lien Category [Axis]</link:label>
    <link:label id="lab_us-gaap_LienCategoryAxis_label_en-US" xlink:label="lab_us-gaap_LienCategoryAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lien Category [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LienCategoryAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LienCategoryAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LienCategoryAxis" xlink:to="lab_us-gaap_LienCategoryAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ActiveHECMLoansUPBExcludedDirectlyAssigned_019cc591-a891-72ed-8855-851b7b895ac6_terseLabel_en-US" xlink:label="lab_onit_ActiveHECMLoansUPBExcludedDirectlyAssigned" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Active HECM Loans, UPB Excluded, Directly Assigned</link:label>
    <link:label id="lab_onit_ActiveHECMLoansUPBExcludedDirectlyAssigned_label_en-US" xlink:label="lab_onit_ActiveHECMLoansUPBExcludedDirectlyAssigned" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Active HECM Loans, UPB Excluded, Directly Assigned</link:label>
    <link:label id="lab_onit_ActiveHECMLoansUPBExcludedDirectlyAssigned_documentation_en-US" xlink:label="lab_onit_ActiveHECMLoansUPBExcludedDirectlyAssigned" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Active HECM Loans, UPB Excluded, Directly Assigned</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ActiveHECMLoansUPBExcludedDirectlyAssigned" xlink:href="onit-20260331.xsd#onit_ActiveHECMLoansUPBExcludedDirectlyAssigned"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ActiveHECMLoansUPBExcludedDirectlyAssigned" xlink:to="lab_onit_ActiveHECMLoansUPBExcludedDirectlyAssigned" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ForwardMortgageLoanInterestRateLockCommitmentsMember_019cc591-a891-7e99-9732-36d7dd5be09a_terseLabel_en-US" xlink:label="lab_onit_ForwardMortgageLoanInterestRateLockCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Forward Mortgage Loan Interest Rate Lock Commitments</link:label>
    <link:label id="lab_onit_ForwardMortgageLoanInterestRateLockCommitmentsMember_label_en-US" xlink:label="lab_onit_ForwardMortgageLoanInterestRateLockCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Forward Mortgage Loan Interest Rate Lock Commitments [Member]</link:label>
    <link:label id="lab_onit_ForwardMortgageLoanInterestRateLockCommitmentsMember_documentation_en-US" xlink:label="lab_onit_ForwardMortgageLoanInterestRateLockCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Forward mortgage loan interest rate lock commitments.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ForwardMortgageLoanInterestRateLockCommitmentsMember" xlink:href="onit-20260331.xsd#onit_ForwardMortgageLoanInterestRateLockCommitmentsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ForwardMortgageLoanInterestRateLockCommitmentsMember" xlink:to="lab_onit_ForwardMortgageLoanInterestRateLockCommitmentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesRealEstateOwned_019cc591-a75f-74db-8f36-da72a646fef7_negatedTerseLabel_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesRealEstateOwned" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">REO (Other assets)</link:label>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesRealEstateOwned_label_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesRealEstateOwned" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Investment, Reverse Mortgages, Real Estate Owned</link:label>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesRealEstateOwned_documentation_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesRealEstateOwned" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of loans held for investment, reverse mortgages transferred to real estate owned during the period.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForInvestmentReverseMortgagesRealEstateOwned" xlink:href="onit-20260331.xsd#onit_LoansHeldForInvestmentReverseMortgagesRealEstateOwned"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForInvestmentReverseMortgagesRealEstateOwned" xlink:to="lab_onit_LoansHeldForInvestmentReverseMortgagesRealEstateOwned" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TemporaryEquityLiquidationPreferencePerShare_019cc591-a808-7ae4-8e2a-01b460b8521b_terseLabel_en-US" xlink:label="lab_us-gaap_TemporaryEquityLiquidationPreferencePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Temporary Equity, Liquidation Preference Per Share</link:label>
    <link:label id="lab_us-gaap_TemporaryEquityLiquidationPreferencePerShare_label_en-US" xlink:label="lab_us-gaap_TemporaryEquityLiquidationPreferencePerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Temporary Equity, Liquidation Preference Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityLiquidationPreferencePerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityLiquidationPreferencePerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TemporaryEquityLiquidationPreferencePerShare" xlink:to="lab_us-gaap_TemporaryEquityLiquidationPreferencePerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ReverseSubservicingAncillaryIncome_019cc591-a808-7d81-a73b-1a89caa008fc_terseLabel_en-US" xlink:label="lab_onit_ReverseSubservicingAncillaryIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reverse subservicing ancillary fees</link:label>
    <link:label id="lab_onit_ReverseSubservicingAncillaryIncome_label_en-US" xlink:label="lab_onit_ReverseSubservicingAncillaryIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reverse Subservicing Ancillary Income</link:label>
    <link:label id="lab_onit_ReverseSubservicingAncillaryIncome_documentation_en-US" xlink:label="lab_onit_ReverseSubservicingAncillaryIncome" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Reverse subservicing ancillary income.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ReverseSubservicingAncillaryIncome" xlink:href="onit-20260331.xsd#onit_ReverseSubservicingAncillaryIncome"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ReverseSubservicingAncillaryIncome" xlink:to="lab_onit_ReverseSubservicingAncillaryIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_TBAForwardMortgageBackedSecuritiesTradesMember_019cc591-a75e-79f9-8f13-185a068f9fa6_terseLabel_en-US" xlink:label="lab_onit_TBAForwardMortgageBackedSecuritiesTradesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">TBA forward MBS trades</link:label>
    <link:label id="lab_onit_TBAForwardMortgageBackedSecuritiesTradesMember_label_en-US" xlink:label="lab_onit_TBAForwardMortgageBackedSecuritiesTradesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">TBA/Forward Mortgage Backed Securities Trades [Member]</link:label>
    <link:label id="lab_onit_TBAForwardMortgageBackedSecuritiesTradesMember_documentation_en-US" xlink:label="lab_onit_TBAForwardMortgageBackedSecuritiesTradesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">TBA/Forward Mortgage Backed Securities Trades [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_TBAForwardMortgageBackedSecuritiesTradesMember" xlink:href="onit-20260331.xsd#onit_TBAForwardMortgageBackedSecuritiesTradesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_TBAForwardMortgageBackedSecuritiesTradesMember" xlink:to="lab_onit_TBAForwardMortgageBackedSecuritiesTradesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestPayableCurrent_019cc591-a891-7aed-a537-4d7fadd8ac92_terseLabel_en-US" xlink:label="lab_us-gaap_InterestPayableCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accrued interest payable (1)</link:label>
    <link:label id="lab_us-gaap_InterestPayableCurrent_label_en-US" xlink:label="lab_us-gaap_InterestPayableCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Payable, Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPayableCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestPayableCurrent" xlink:to="lab_us-gaap_InterestPayableCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityCentralIndexKey_019cc591-a891-76e7-a7ed-bb546859468b_terseLabel_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:label id="lab_dei_EntityCentralIndexKey_label_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCentralIndexKey" xlink:to="lab_dei_EntityCentralIndexKey" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_GSEMember_019cc591-a75f-746c-82dc-acce549bede2_terseLabel_en-US" xlink:label="lab_onit_GSEMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">GSE</link:label>
    <link:label id="lab_onit_GSEMember_label_en-US" xlink:label="lab_onit_GSEMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">GSE [Member]</link:label>
    <link:label id="lab_onit_GSEMember_documentation_en-US" xlink:label="lab_onit_GSEMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">GSE</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_GSEMember" xlink:href="onit-20260331.xsd#onit_GSEMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_GSEMember" xlink:to="lab_onit_GSEMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PeoName_terseLabel_en-US" xlink:label="lab_ecd_PeoName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PEO Name</link:label>
    <link:label id="lab_ecd_PeoName_label_en-US" xlink:label="lab_ecd_PeoName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PEO Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeoName" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_PeoName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PeoName" xlink:to="lab_ecd_PeoName" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_OLITAssetBackedNotesSeries2024HB2Member_019cc591-a891-7184-b2c9-ebc1e5fda522_terseLabel_en-US" xlink:label="lab_onit_OLITAssetBackedNotesSeries2024HB2Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OLIT Asset-Backed Notes, Series 2024-HB2</link:label>
    <link:label id="lab_onit_OLITAssetBackedNotesSeries2024HB2Member_label_en-US" xlink:label="lab_onit_OLITAssetBackedNotesSeries2024HB2Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">OLIT Asset-Backed Notes, Series 2024-HB2 [Member]</link:label>
    <link:label id="lab_onit_OLITAssetBackedNotesSeries2024HB2Member_documentation_en-US" xlink:label="lab_onit_OLITAssetBackedNotesSeries2024HB2Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">OLIT Asset-Backed Notes, Series 2024-HB2</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OLITAssetBackedNotesSeries2024HB2Member" xlink:href="onit-20260331.xsd#onit_OLITAssetBackedNotesSeries2024HB2Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_OLITAssetBackedNotesSeries2024HB2Member" xlink:to="lab_onit_OLITAssetBackedNotesSeries2024HB2Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_Revenues_019cc591-a808-709c-937b-f51e511a00d5_totalLabel_en-US" xlink:label="lab_us-gaap_Revenues" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total revenue</link:label>
    <link:label id="lab_us-gaap_Revenues_019cc591-a808-7eb5-bd9c-a02f2b9cecd6_terseLabel_en-US" xlink:label="lab_us-gaap_Revenues" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revenue</link:label>
    <link:label id="lab_us-gaap_Revenues_label_en-US" xlink:label="lab_us-gaap_Revenues" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenues</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Revenues"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Revenues" xlink:to="lab_us-gaap_Revenues" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember_terseLabel_en-US" xlink:label="lab_ecd_FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year</link:label>
    <link:label id="lab_ecd_FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember_label_en-US" xlink:label="lab_ecd_FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember" xlink:to="lab_ecd_FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SupplementalCashFlowElementsAbstract_019cc591-a808-74da-afc5-83788a503a7d_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowElementsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Supplemental Cash Flow Elements [Abstract]</link:label>
    <link:label id="lab_us-gaap_SupplementalCashFlowElementsAbstract_label_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowElementsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplemental Cash Flow Elements [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalCashFlowElementsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SupplementalCashFlowElementsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementalCashFlowElementsAbstract" xlink:to="lab_us-gaap_SupplementalCashFlowElementsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_NewHECMLoanOriginationsAndHECMLoanTailsUnsecuritizedMember_019dd4f3-32c1-7d2d-8dc0-ce776ebfd348_terseLabel_en-US" xlink:label="lab_onit_NewHECMLoanOriginationsAndHECMLoanTailsUnsecuritizedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">New HECM Loan Originations And HECM Loan Tails - Unsecuritized</link:label>
    <link:label id="lab_onit_NewHECMLoanOriginationsAndHECMLoanTailsUnsecuritizedMember_label_en-US" xlink:label="lab_onit_NewHECMLoanOriginationsAndHECMLoanTailsUnsecuritizedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">New HECM Loan Originations And HECM Loan Tails - Unsecuritized [Member]</link:label>
    <link:label id="lab_onit_NewHECMLoanOriginationsAndHECMLoanTailsUnsecuritizedMember_documentation_en-US" xlink:label="lab_onit_NewHECMLoanOriginationsAndHECMLoanTailsUnsecuritizedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">New HECM Loan Originations And HECM Loan Tails - Unsecuritized</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_NewHECMLoanOriginationsAndHECMLoanTailsUnsecuritizedMember" xlink:href="onit-20260331.xsd#onit_NewHECMLoanOriginationsAndHECMLoanTailsUnsecuritizedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_NewHECMLoanOriginationsAndHECMLoanTailsUnsecuritizedMember" xlink:to="lab_onit_NewHECMLoanOriginationsAndHECMLoanTailsUnsecuritizedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_OutstandingAggtErrCompAmt_terseLabel_en-US" xlink:label="lab_ecd_OutstandingAggtErrCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Outstanding Aggregate Erroneous Compensation Amount</link:label>
    <link:label id="lab_ecd_OutstandingAggtErrCompAmt_label_en-US" xlink:label="lab_ecd_OutstandingAggtErrCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Outstanding Aggregate Erroneous Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_OutstandingAggtErrCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_OutstandingAggtErrCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_OutstandingAggtErrCompAmt" xlink:to="lab_ecd_OutstandingAggtErrCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale_019cc591-a808-766d-88d0-ebf8bfded611_terseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Originations and purchases</link:label>
    <link:label id="lab_us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale_label_en-US" xlink:label="lab_us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payment for Origination, Loan, Mortgage, Held-for-Sale</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale" xlink:to="lab_us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cc591-a892-79b2-8c36-e2ec610766bc_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Segment Reporting Information, by Segment [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_label_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Segment Reporting Information, by Segment [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:to="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AdvancesPaymentsonBehalfofBorrowersCollectionOfAdvancesChargeOffsAndOtherNet_019cc591-a808-7409-a364-4058e9a0685e_negatedTerseLabel_en-US" xlink:label="lab_onit_AdvancesPaymentsonBehalfofBorrowersCollectionOfAdvancesChargeOffsAndOtherNet" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Collections of advances and other</link:label>
    <link:label id="lab_onit_AdvancesPaymentsonBehalfofBorrowersCollectionOfAdvancesChargeOffsAndOtherNet_label_en-US" xlink:label="lab_onit_AdvancesPaymentsonBehalfofBorrowersCollectionOfAdvancesChargeOffsAndOtherNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advances Payments on Behalf of Borrowers, Collection Of Advances, Charge-Offs And Other Net</link:label>
    <link:label id="lab_onit_AdvancesPaymentsonBehalfofBorrowersCollectionOfAdvancesChargeOffsAndOtherNet_documentation_en-US" xlink:label="lab_onit_AdvancesPaymentsonBehalfofBorrowersCollectionOfAdvancesChargeOffsAndOtherNet" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Advances payments on behalf of borrowers, collection of advances, charge-offs and other net.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AdvancesPaymentsonBehalfofBorrowersCollectionOfAdvancesChargeOffsAndOtherNet" xlink:href="onit-20260331.xsd#onit_AdvancesPaymentsonBehalfofBorrowersCollectionOfAdvancesChargeOffsAndOtherNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AdvancesPaymentsonBehalfofBorrowersCollectionOfAdvancesChargeOffsAndOtherNet" xlink:to="lab_onit_AdvancesPaymentsonBehalfofBorrowersCollectionOfAdvancesChargeOffsAndOtherNet" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_TotalFinancingAgreementsMember_019dd4f6-dbfe-7bf0-bfa9-428a2681b610_terseLabel_en-US" xlink:label="lab_onit_TotalFinancingAgreementsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Financing Agreements</link:label>
    <link:label id="lab_onit_TotalFinancingAgreementsMember_label_en-US" xlink:label="lab_onit_TotalFinancingAgreementsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Financing Agreements [Member]</link:label>
    <link:label id="lab_onit_TotalFinancingAgreementsMember_documentation_en-US" xlink:label="lab_onit_TotalFinancingAgreementsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total Financing Agreements</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_TotalFinancingAgreementsMember" xlink:href="onit-20260331.xsd#onit_TotalFinancingAgreementsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_TotalFinancingAgreementsMember" xlink:to="lab_onit_TotalFinancingAgreementsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_019cc591-a891-73e4-adb9-b9d3ff1aaa74_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Derivative Activity</link:label>
    <link:label id="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xlink:to="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MovementInMortgageLoansOnRealEstateRollForward_019cc591-a75f-7d59-a230-59dbf4ad7da6_terseLabel_en-US" xlink:label="lab_us-gaap_MovementInMortgageLoansOnRealEstateRollForward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HMBS Related Borrowings</link:label>
    <link:label id="lab_us-gaap_MovementInMortgageLoansOnRealEstateRollForward_label_en-US" xlink:label="lab_us-gaap_MovementInMortgageLoansOnRealEstateRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MovementInMortgageLoansOnRealEstateRollForward" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MovementInMortgageLoansOnRealEstateRollForward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MovementInMortgageLoansOnRealEstateRollForward" xlink:to="lab_us-gaap_MovementInMortgageLoansOnRealEstateRollForward" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardExrcPrice_terseLabel_en-US" xlink:label="lab_ecd_AwardExrcPrice" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Exercise Price</link:label>
    <link:label id="lab_ecd_AwardExrcPrice_label_en-US" xlink:label="lab_ecd_AwardExrcPrice" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Exercise Price</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardExrcPrice" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AwardExrcPrice"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardExrcPrice" xlink:to="lab_ecd_AwardExrcPrice" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityFilerCategory_019cc591-a891-7704-a21b-ce53e2779508_terseLabel_en-US" xlink:label="lab_dei_EntityFilerCategory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Filer Category</link:label>
    <link:label id="lab_dei_EntityFilerCategory_label_en-US" xlink:label="lab_dei_EntityFilerCategory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Filer Category</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFilerCategory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityFilerCategory" xlink:to="lab_dei_EntityFilerCategory" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsequentEventTypeAxis_019dd4ef-3527-7cc0-b29c-18448e401ba4_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Axis]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventTypeAxis_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTypeAxis" xlink:to="lab_us-gaap_SubsequentEventTypeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_InterestIncomeCapitalized_019dd3e2-77bf-7b48-bb15-7bc912cfea93_negatedTerseLabel_en-US" xlink:label="lab_onit_InterestIncomeCapitalized" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Interest capitalized on reverse buyouts</link:label>
    <link:label id="lab_onit_InterestIncomeCapitalized_label_en-US" xlink:label="lab_onit_InterestIncomeCapitalized" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Income Capitalized</link:label>
    <link:label id="lab_onit_InterestIncomeCapitalized_documentation_en-US" xlink:label="lab_onit_InterestIncomeCapitalized" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest Income Capitalized</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_InterestIncomeCapitalized" xlink:href="onit-20260331.xsd#onit_InterestIncomeCapitalized"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_InterestIncomeCapitalized" xlink:to="lab_onit_InterestIncomeCapitalized" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_FairValueGSEMortgageServicingRightsMember_019cc591-a75f-7f25-8a57-fedb89f12a8d_terseLabel_en-US" xlink:label="lab_onit_FairValueGSEMortgageServicingRightsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value GSE Mortgage Servicing Rights</link:label>
    <link:label id="lab_onit_FairValueGSEMortgageServicingRightsMember_label_en-US" xlink:label="lab_onit_FairValueGSEMortgageServicingRightsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value GSE Mortgage Servicing Rights [Member]</link:label>
    <link:label id="lab_onit_FairValueGSEMortgageServicingRightsMember_documentation_en-US" xlink:label="lab_onit_FairValueGSEMortgageServicingRightsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fair Value GSE Mortgage Servicing Rights</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_FairValueGSEMortgageServicingRightsMember" xlink:href="onit-20260331.xsd#onit_FairValueGSEMortgageServicingRightsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_FairValueGSEMortgageServicingRightsMember" xlink:to="lab_onit_FairValueGSEMortgageServicingRightsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember_terseLabel_en-US" xlink:label="lab_ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year</link:label>
    <link:label id="lab_ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember_label_en-US" xlink:label="lab_ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember" xlink:to="lab_ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_FinancialLiabilitiesAbstract_019cc591-a891-755f-9d74-793cd372dd5a_terseLabel_en-US" xlink:label="lab_onit_FinancialLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial liabilities</link:label>
    <link:label id="lab_onit_FinancialLiabilitiesAbstract_label_en-US" xlink:label="lab_onit_FinancialLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Liabilities [Abstract]</link:label>
    <link:label id="lab_onit_FinancialLiabilitiesAbstract_documentation_en-US" xlink:label="lab_onit_FinancialLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_FinancialLiabilitiesAbstract" xlink:href="onit-20260331.xsd#onit_FinancialLiabilitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_FinancialLiabilitiesAbstract" xlink:to="lab_onit_FinancialLiabilitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_DebtServiceAccounts_019cc591-a891-7077-b29b-0350e066f8e2_terseLabel_en-US" xlink:label="lab_onit_DebtServiceAccounts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt service accounts</link:label>
    <link:label id="lab_onit_DebtServiceAccounts_019cc591-a891-7bea-801f-a9df55cb0d06_verboseLabel_en-US" xlink:label="lab_onit_DebtServiceAccounts" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Debt service account (Restricted cash)</link:label>
    <link:label id="lab_onit_DebtServiceAccounts_label_en-US" xlink:label="lab_onit_DebtServiceAccounts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Service Accounts</link:label>
    <link:label id="lab_onit_DebtServiceAccounts_documentation_en-US" xlink:label="lab_onit_DebtServiceAccounts" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Service Accounts</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_DebtServiceAccounts" xlink:href="onit-20260331.xsd#onit_DebtServiceAccounts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_DebtServiceAccounts" xlink:to="lab_onit_DebtServiceAccounts" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressAddressLine1_019cc591-a808-7e2f-8920-1879dd1e718a_terseLabel_en-US" xlink:label="lab_dei_EntityAddressAddressLine1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, Address Line One</link:label>
    <link:label id="lab_dei_EntityAddressAddressLine1_label_en-US" xlink:label="lab_dei_EntityAddressAddressLine1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Address, Address Line One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressAddressLine1" xlink:to="lab_dei_EntityAddressAddressLine1" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cc591-a808-722b-8894-a02afe7250cb_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss), Net of Taxes</link:label>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">AOCI Attributable to Parent [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LongTermPurchaseCommitmentRollForward_019cc591-a891-736b-98f6-cfaa296e5398_terseLabel_en-US" xlink:label="lab_onit_LongTermPurchaseCommitmentRollForward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term Purchase Commitment [Roll Forward]</link:label>
    <link:label id="lab_onit_LongTermPurchaseCommitmentRollForward_label_en-US" xlink:label="lab_onit_LongTermPurchaseCommitmentRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Purchase Commitment [Roll Forward]</link:label>
    <link:label id="lab_onit_LongTermPurchaseCommitmentRollForward_documentation_en-US" xlink:label="lab_onit_LongTermPurchaseCommitmentRollForward" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Long-term Purchase Commitment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LongTermPurchaseCommitmentRollForward" xlink:href="onit-20260331.xsd#onit_LongTermPurchaseCommitmentRollForward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LongTermPurchaseCommitmentRollForward" xlink:to="lab_onit_LongTermPurchaseCommitmentRollForward" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_019cc591-a891-7b12-933c-957e1ff48ea2_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Financial Instruments and Hedging Activities</link:label>
    <link:label id="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_label_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instruments and Hedging Activities Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" xlink:to="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_GovernmentForwardLoansMember_019cc591-a75e-71e5-86f3-33f21941e5fb_terseLabel_en-US" xlink:label="lab_onit_GovernmentForwardLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Government- Forward loans</link:label>
    <link:label id="lab_onit_GovernmentForwardLoansMember_label_en-US" xlink:label="lab_onit_GovernmentForwardLoansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Government Forward Loans [Member]</link:label>
    <link:label id="lab_onit_GovernmentForwardLoansMember_documentation_en-US" xlink:label="lab_onit_GovernmentForwardLoansMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Government Forward Loans</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_GovernmentForwardLoansMember" xlink:href="onit-20260331.xsd#onit_GovernmentForwardLoansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_GovernmentForwardLoansMember" xlink:to="lab_onit_GovernmentForwardLoansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ScheduleOfLoansHeldForInvestmentAndHMBSRelatedBorrowingsTableTextBlock_019cc591-a891-757d-99d9-76d106ea97b1_terseLabel_en-US" xlink:label="lab_onit_ScheduleOfLoansHeldForInvestmentAndHMBSRelatedBorrowingsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Loans Held For Investment and HMBS Related Borrowings</link:label>
    <link:label id="lab_onit_ScheduleOfLoansHeldForInvestmentAndHMBSRelatedBorrowingsTableTextBlock_label_en-US" xlink:label="lab_onit_ScheduleOfLoansHeldForInvestmentAndHMBSRelatedBorrowingsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Loans Held For Investment and HMBS Related Borrowings [Table Text Block]</link:label>
    <link:label id="lab_onit_ScheduleOfLoansHeldForInvestmentAndHMBSRelatedBorrowingsTableTextBlock_documentation_en-US" xlink:label="lab_onit_ScheduleOfLoansHeldForInvestmentAndHMBSRelatedBorrowingsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of loans held for investment and HMBS related borrowings.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ScheduleOfLoansHeldForInvestmentAndHMBSRelatedBorrowingsTableTextBlock" xlink:href="onit-20260331.xsd#onit_ScheduleOfLoansHeldForInvestmentAndHMBSRelatedBorrowingsTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ScheduleOfLoansHeldForInvestmentAndHMBSRelatedBorrowingsTableTextBlock" xlink:to="lab_onit_ScheduleOfLoansHeldForInvestmentAndHMBSRelatedBorrowingsTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardGrantDateFairValue_terseLabel_en-US" xlink:label="lab_ecd_AwardGrantDateFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value as of Grant Date</link:label>
    <link:label id="lab_ecd_AwardGrantDateFairValue_label_en-US" xlink:label="lab_ecd_AwardGrantDateFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Grant Date Fair Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardGrantDateFairValue" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AwardGrantDateFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardGrantDateFairValue" xlink:to="lab_ecd_AwardGrantDateFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccruedIncomeTaxes_019cc591-a808-7217-bf5b-6c608547ca76_terseLabel_en-US" xlink:label="lab_us-gaap_AccruedIncomeTaxes" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income taxes payable</link:label>
    <link:label id="lab_us-gaap_AccruedIncomeTaxes_label_en-US" xlink:label="lab_us-gaap_AccruedIncomeTaxes" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued Income Taxes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedIncomeTaxes" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedIncomeTaxes"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccruedIncomeTaxes" xlink:to="lab_us-gaap_AccruedIncomeTaxes" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_SecuritizationNotesMember_019cc591-a891-7c8a-a9f1-0ab3ecf37f6c_terseLabel_en-US" xlink:label="lab_onit_SecuritizationNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Securitization Notes</link:label>
    <link:label id="lab_onit_SecuritizationNotesMember_label_en-US" xlink:label="lab_onit_SecuritizationNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Securitization Notes [Member]</link:label>
    <link:label id="lab_onit_SecuritizationNotesMember_documentation_en-US" xlink:label="lab_onit_SecuritizationNotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Securitization Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_SecuritizationNotesMember" xlink:href="onit-20260331.xsd#onit_SecuritizationNotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_SecuritizationNotesMember" xlink:to="lab_onit_SecuritizationNotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock_019cc591-a891-7580-bc8e-7b22919a8a5b_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Senior Notes</link:label>
    <link:label id="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Long-Term Debt Instruments [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDebtInstrumentsTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:to="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LaborAndRelatedExpense_019cc591-a75f-7e9e-84d1-1828173ce5e0_terseLabel_en-US" xlink:label="lab_us-gaap_LaborAndRelatedExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Compensation and benefits</link:label>
    <link:label id="lab_us-gaap_LaborAndRelatedExpense_label_en-US" xlink:label="lab_us-gaap_LaborAndRelatedExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Labor and Related Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LaborAndRelatedExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LaborAndRelatedExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LaborAndRelatedExpense" xlink:to="lab_us-gaap_LaborAndRelatedExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgages_019cc591-a808-7fb6-a6c1-f0df46ee1caf_periodStartLabel_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgages" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance</link:label>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgages_019cc591-a808-75c0-af9c-f8a6dfedfa1f_periodEndLabel_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgages" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance</link:label>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgages_label_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgages" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held for Investment, Reverse Mortgages</link:label>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgages_documentation_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgages" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans held for investment, reverse mortgages.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForInvestmentReverseMortgages" xlink:href="onit-20260331.xsd#onit_LoansHeldForInvestmentReverseMortgages"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForInvestmentReverseMortgages" xlink:to="lab_onit_LoansHeldForInvestmentReverseMortgages" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_019cc591-a808-7e78-b1ed-7b76edd60be0_terseLabel_en-US" xlink:label="lab_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock option awards (in shares)</link:label>
    <link:label id="lab_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_label_en-US" xlink:label="lab_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:to="lab_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CostsAndExpenses_019cc591-a75f-78ba-a39e-99499aa0cd7c_totalLabel_en-US" xlink:label="lab_us-gaap_CostsAndExpenses" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total operating expenses</link:label>
    <link:label id="lab_us-gaap_CostsAndExpenses_label_en-US" xlink:label="lab_us-gaap_CostsAndExpenses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Costs and Expenses</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostsAndExpenses"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CostsAndExpenses" xlink:to="lab_us-gaap_CostsAndExpenses" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RelatedPartyTransactionLineItems_019cc591-a808-7bf2-af18-e5d41ea19b60_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Line Items]</link:label>
    <link:label id="lab_us-gaap_RelatedPartyTransactionLineItems_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems" xlink:to="lab_us-gaap_RelatedPartyTransactionLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentQuarterlyReport_019cc591-a891-7967-80d2-924ce14c155e_terseLabel_en-US" xlink:label="lab_dei_DocumentQuarterlyReport" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Quarterly Report</link:label>
    <link:label id="lab_dei_DocumentQuarterlyReport_label_en-US" xlink:label="lab_dei_DocumentQuarterlyReport" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Quarterly Report</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentQuarterlyReport"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentQuarterlyReport" xlink:to="lab_dei_DocumentQuarterlyReport" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DeferredIncomeTaxesAndTaxCredits_019dd3e3-ba65-762e-ba2e-c91267e97354_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxesAndTaxCredits" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred income tax expense (benefit)</link:label>
    <link:label id="lab_us-gaap_DeferredIncomeTaxesAndTaxCredits_label_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxesAndTaxCredits" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Income Taxes and Tax Credits</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits" xlink:to="lab_us-gaap_DeferredIncomeTaxesAndTaxCredits" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ChangedPeerGroupFnTextBlock_terseLabel_en-US" xlink:label="lab_ecd_ChangedPeerGroupFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Changed Peer Group, Footnote</link:label>
    <link:label id="lab_ecd_ChangedPeerGroupFnTextBlock_label_en-US" xlink:label="lab_ecd_ChangedPeerGroupFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Changed Peer Group, Footnote [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ChangedPeerGroupFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_ChangedPeerGroupFnTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_ChangedPeerGroupFnTextBlock" xlink:to="lab_ecd_ChangedPeerGroupFnTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherFinancialInstrumentsUsedInOperatingActivities_019cc591-a808-78db-ab1d-ed82e47ab840_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherFinancialInstrumentsUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Gain on reverse loans and HMBS-related borrowings, net</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherFinancialInstrumentsUsedInOperatingActivities_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherFinancialInstrumentsUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Other Financial Instruments Used in Operating Activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherFinancialInstrumentsUsedInOperatingActivities" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherFinancialInstrumentsUsedInOperatingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherFinancialInstrumentsUsedInOperatingActivities" xlink:to="lab_us-gaap_IncreaseDecreaseInOtherFinancialInstrumentsUsedInOperatingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_RepurchaseAgreementCounterpartyNameDomain_019cc591-a891-7eeb-962a-31194a6305ac_terseLabel_en-US" xlink:label="lab_srt_RepurchaseAgreementCounterpartyNameDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Counterparty Name [Domain]</link:label>
    <link:label id="lab_srt_RepurchaseAgreementCounterpartyNameDomain_label_en-US" xlink:label="lab_srt_RepurchaseAgreementCounterpartyNameDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Counterparty Name [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="lab_srt_RepurchaseAgreementCounterpartyNameDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingAndSubservicingFeesBenchmarkMember_019cc591-a808-7a0c-9277-fb7db887d425_terseLabel_en-US" xlink:label="lab_onit_ServicingAndSubservicingFeesBenchmarkMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing And Subservicing Fees Benchmark</link:label>
    <link:label id="lab_onit_ServicingAndSubservicingFeesBenchmarkMember_label_en-US" xlink:label="lab_onit_ServicingAndSubservicingFeesBenchmarkMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing And Subservicing Fees Benchmark [Member]</link:label>
    <link:label id="lab_onit_ServicingAndSubservicingFeesBenchmarkMember_documentation_en-US" xlink:label="lab_onit_ServicingAndSubservicingFeesBenchmarkMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing And Subservicing Fees Benchmark</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingAndSubservicingFeesBenchmarkMember" xlink:href="onit-20260331.xsd#onit_ServicingAndSubservicingFeesBenchmarkMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingAndSubservicingFeesBenchmarkMember" xlink:to="lab_onit_ServicingAndSubservicingFeesBenchmarkMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_CounterpartyRiskMember_019dd4f3-ae3c-7445-a4e8-758b21d38d63_terseLabel_en-US" xlink:label="lab_onit_CounterpartyRiskMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Counterparty Risk</link:label>
    <link:label id="lab_onit_CounterpartyRiskMember_label_en-US" xlink:label="lab_onit_CounterpartyRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Counterparty Risk [Member]</link:label>
    <link:label id="lab_onit_CounterpartyRiskMember_documentation_en-US" xlink:label="lab_onit_CounterpartyRiskMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Counterparty Risk</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_CounterpartyRiskMember" xlink:href="onit-20260331.xsd#onit_CounterpartyRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_CounterpartyRiskMember" xlink:to="lab_onit_CounterpartyRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AdjToPeoCompFnTextBlock_terseLabel_en-US" xlink:label="lab_ecd_AdjToPeoCompFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustment To PEO Compensation, Footnote</link:label>
    <link:label id="lab_ecd_AdjToPeoCompFnTextBlock_label_en-US" xlink:label="lab_ecd_AdjToPeoCompFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustment To PEO Compensation, Footnote [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AdjToPeoCompFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AdjToPeoCompFnTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AdjToPeoCompFnTextBlock" xlink:to="lab_ecd_AdjToPeoCompFnTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_019cc591-a808-7720-87b3-3ed24edfb593_terseLabel_en-US" xlink:label="lab_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans Insured or Guaranteed by Government Authorities [Domain]</link:label>
    <link:label id="lab_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_label_en-US" xlink:label="lab_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Insured or Guaranteed by Government Authorities [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain" xlink:to="lab_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TrdArrIndTitle_terseLabel_en-US" xlink:label="lab_ecd_TrdArrIndTitle" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Title</link:label>
    <link:label id="lab_ecd_TrdArrIndTitle_label_en-US" xlink:label="lab_ecd_TrdArrIndTitle" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Arrangement, Individual Title</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrIndTitle" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_TrdArrIndTitle"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TrdArrIndTitle" xlink:to="lab_ecd_TrdArrIndTitle" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PeerGroupTotalShareholderRtnAmt_terseLabel_en-US" xlink:label="lab_ecd_PeerGroupTotalShareholderRtnAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Peer Group Total Shareholder Return Amount</link:label>
    <link:label id="lab_ecd_PeerGroupTotalShareholderRtnAmt_label_en-US" xlink:label="lab_ecd_PeerGroupTotalShareholderRtnAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Peer Group Total Shareholder Return Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeerGroupTotalShareholderRtnAmt" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_PeerGroupTotalShareholderRtnAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PeerGroupTotalShareholderRtnAmt" xlink:to="lab_ecd_PeerGroupTotalShareholderRtnAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_OcwenFreddieAdvanceFundingMember_019cc591-a891-78a2-8788-2624bc2c02ef_terseLabel_en-US" xlink:label="lab_onit_OcwenFreddieAdvanceFundingMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Ocwen Freddie Advance Funding Facility (OFAF)</link:label>
    <link:label id="lab_onit_OcwenFreddieAdvanceFundingMember_label_en-US" xlink:label="lab_onit_OcwenFreddieAdvanceFundingMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ocwen Freddie Advance Funding [Member]</link:label>
    <link:label id="lab_onit_OcwenFreddieAdvanceFundingMember_documentation_en-US" xlink:label="lab_onit_OcwenFreddieAdvanceFundingMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ocwen Freddie advance funding.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OcwenFreddieAdvanceFundingMember" xlink:href="onit-20260331.xsd#onit_OcwenFreddieAdvanceFundingMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_OcwenFreddieAdvanceFundingMember" xlink:to="lab_onit_OcwenFreddieAdvanceFundingMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_RightsToMortgageServicingRightsTextBlock_019cc591-a808-75b6-b1fb-bf8deb781735_terseLabel_en-US" xlink:label="lab_onit_RightsToMortgageServicingRightsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Financing Liabilities, at Fair Value</link:label>
    <link:label id="lab_onit_RightsToMortgageServicingRightsTextBlock_label_en-US" xlink:label="lab_onit_RightsToMortgageServicingRightsTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Rights To Mortgage Servicing Rights [Text Block]</link:label>
    <link:label id="lab_onit_RightsToMortgageServicingRightsTextBlock_documentation_en-US" xlink:label="lab_onit_RightsToMortgageServicingRightsTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This represents the disclosure of the rights to mortgage servicing rights sold and subsequent transfer of servicing assets, unpaid principal balance of assets upon receiving the consents and changes in the financing liabilities related to rights to mortgage servicing rights sold.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_RightsToMortgageServicingRightsTextBlock" xlink:href="onit-20260331.xsd#onit_RightsToMortgageServicingRightsTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_RightsToMortgageServicingRightsTextBlock" xlink:to="lab_onit_RightsToMortgageServicingRightsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AdvancesTextBlock_019cc591-a75e-7556-84c3-77c5bb176fed_terseLabel_en-US" xlink:label="lab_onit_AdvancesTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advances</link:label>
    <link:label id="lab_onit_AdvancesTextBlock_label_en-US" xlink:label="lab_onit_AdvancesTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advances [Text Block]</link:label>
    <link:label id="lab_onit_AdvancesTextBlock_documentation_en-US" xlink:label="lab_onit_AdvancesTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure of non-interest-bearing advances made on behalf of borrowers or on foreclosed properties. Includes receivables for funds advanced by the servicer to meet contractual principal and interest remittance requirements for the investors, pay property taxes and insurance premiums and process foreclosures. Also includes receivables for funds advanced to maintain, repair and market foreclosed real estate properties on behalf of investors.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AdvancesTextBlock" xlink:href="onit-20260331.xsd#onit_AdvancesTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AdvancesTextBlock" xlink:to="lab_onit_AdvancesTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PrepaidExpenseAndOtherAssets_019cc591-a891-79bb-a042-8fb4068941e1_terseLabel_en-US" xlink:label="lab_us-gaap_PrepaidExpenseAndOtherAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_PrepaidExpenseAndOtherAssets_label_en-US" xlink:label="lab_us-gaap_PrepaidExpenseAndOtherAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Prepaid Expense and Other Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssets" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseAndOtherAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssets" xlink:to="lab_us-gaap_PrepaidExpenseAndOtherAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_NonPeoNeoMember_terseLabel_en-US" xlink:label="lab_ecd_NonPeoNeoMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-PEO NEO</link:label>
    <link:label id="lab_ecd_NonPeoNeoMember_label_en-US" xlink:label="lab_ecd_NonPeoNeoMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-PEO NEO [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonPeoNeoMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_NonPeoNeoMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_NonPeoNeoMember" xlink:to="lab_ecd_NonPeoNeoMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ConcentrationRiskAmount_019cc591-a891-75ad-b4d5-fbd2a7dbdd62_terseLabel_en-US" xlink:label="lab_onit_ConcentrationRiskAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Concentration Risk, Amount</link:label>
    <link:label id="lab_onit_ConcentrationRiskAmount_label_en-US" xlink:label="lab_onit_ConcentrationRiskAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk, Amount</link:label>
    <link:label id="lab_onit_ConcentrationRiskAmount_documentation_en-US" xlink:label="lab_onit_ConcentrationRiskAmount" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Concentration Risk, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ConcentrationRiskAmount" xlink:href="onit-20260331.xsd#onit_ConcentrationRiskAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ConcentrationRiskAmount" xlink:to="lab_onit_ConcentrationRiskAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CashFlowsBetweenTransfereeAndTransferorServicingFees_019cc591-a891-70c4-bd7b-ad97d0198de4_terseLabel_en-US" xlink:label="lab_us-gaap_CashFlowsBetweenTransfereeAndTransferorServicingFees" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing fees collected</link:label>
    <link:label id="lab_us-gaap_CashFlowsBetweenTransfereeAndTransferorServicingFees_label_en-US" xlink:label="lab_us-gaap_CashFlowsBetweenTransfereeAndTransferorServicingFees" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Flows Between Transferor and Transferee, Servicing Fees</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowsBetweenTransfereeAndTransferorServicingFees" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashFlowsBetweenTransfereeAndTransferorServicingFees"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashFlowsBetweenTransfereeAndTransferorServicingFees" xlink:to="lab_us-gaap_CashFlowsBetweenTransfereeAndTransferorServicingFees" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_TaxesAndInsuranceMember_019cc591-a891-7eae-9d2d-95a98eeac3a5_terseLabel_en-US" xlink:label="lab_onit_TaxesAndInsuranceMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Taxes and insurance</link:label>
    <link:label id="lab_onit_TaxesAndInsuranceMember_label_en-US" xlink:label="lab_onit_TaxesAndInsuranceMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Taxes And Insurance [Member]</link:label>
    <link:label id="lab_onit_TaxesAndInsuranceMember_documentation_en-US" xlink:label="lab_onit_TaxesAndInsuranceMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Advances on taxes and insurance.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_TaxesAndInsuranceMember" xlink:href="onit-20260331.xsd#onit_TaxesAndInsuranceMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_TaxesAndInsuranceMember" xlink:to="lab_onit_TaxesAndInsuranceMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeLiabilityNotionalAmount_019cc591-a808-79a7-baac-d047eb7f37c8_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeLiabilityNotionalAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative liability, notional amount</link:label>
    <link:label id="lab_us-gaap_DerivativeLiabilityNotionalAmount_label_en-US" xlink:label="lab_us-gaap_DerivativeLiabilityNotionalAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Liability, Notional Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityNotionalAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilityNotionalAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeLiabilityNotionalAmount" xlink:to="lab_us-gaap_DerivativeLiabilityNotionalAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValuePeriodIncreaseDecrease_019cc591-a891-7467-a474-a7db8536492d_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValuePeriodIncreaseDecrease" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Servicing Asset at Fair Value, Period Increase (Decrease)</link:label>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValuePeriodIncreaseDecrease_label_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValuePeriodIncreaseDecrease" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset at Fair Value, Period Increase (Decrease)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValuePeriodIncreaseDecrease" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValuePeriodIncreaseDecrease"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingAssetAtFairValuePeriodIncreaseDecrease" xlink:to="lab_us-gaap_ServicingAssetAtFairValuePeriodIncreaseDecrease" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FinancingReceivableAllowanceForCreditLosses_019cc591-a891-71c0-96e0-12abfc6b4e7e_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLosses" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Allowance for losses</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableAllowanceForCreditLosses_019cc591-a891-7b34-beec-8f2a4851b4d0_negatedPeriodStartLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLosses" xlink:role="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance - Allowance for Losses</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableAllowanceForCreditLosses_019cc591-a891-7560-9c04-535ac217dc3e_negatedPeriodEndLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLosses" xlink:role="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance - Allowance for Losses</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableAllowanceForCreditLosses_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLosses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Allowance for Credit Loss</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLosses" xlink:to="lab_us-gaap_FinancingReceivableAllowanceForCreditLosses" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AdvancesOnBehalfOfBorrowersLineItems_019cc591-a808-7766-ad82-5184fbb608f5_terseLabel_en-US" xlink:label="lab_onit_AdvancesOnBehalfOfBorrowersLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advances On Behalf of Borrowers [Line Items]</link:label>
    <link:label id="lab_onit_AdvancesOnBehalfOfBorrowersLineItems_label_en-US" xlink:label="lab_onit_AdvancesOnBehalfOfBorrowersLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advances On Behalf of Borrowers [Line Items]</link:label>
    <link:label id="lab_onit_AdvancesOnBehalfOfBorrowersLineItems_documentation_en-US" xlink:label="lab_onit_AdvancesOnBehalfOfBorrowersLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Advances On Behalf of Borrowers [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AdvancesOnBehalfOfBorrowersLineItems" xlink:href="onit-20260331.xsd#onit_AdvancesOnBehalfOfBorrowersLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AdvancesOnBehalfOfBorrowersLineItems" xlink:to="lab_onit_AdvancesOnBehalfOfBorrowersLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">All Award Types</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Type [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_EqtyAwrdsAdjsMember_terseLabel_en-US" xlink:label="lab_ecd_EqtyAwrdsAdjsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Awards Adjustments</link:label>
    <link:label id="lab_ecd_EqtyAwrdsAdjsMember_label_en-US" xlink:label="lab_ecd_EqtyAwrdsAdjsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Awards Adjustments [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_EqtyAwrdsAdjsMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_EqtyAwrdsAdjsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_EqtyAwrdsAdjsMember" xlink:to="lab_ecd_EqtyAwrdsAdjsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PnsnBnftsAdjFnTextBlock_terseLabel_en-US" xlink:label="lab_ecd_PnsnBnftsAdjFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pension Benefits Adjustments, Footnote</link:label>
    <link:label id="lab_ecd_PnsnBnftsAdjFnTextBlock_label_en-US" xlink:label="lab_ecd_PnsnBnftsAdjFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pension Benefits Adjustments, Footnote [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PnsnBnftsAdjFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_PnsnBnftsAdjFnTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PnsnBnftsAdjFnTextBlock" xlink:to="lab_ecd_PnsnBnftsAdjFnTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ForeclosuresAndBankruptcyCostsMember_019cc591-a75f-7fa4-b592-2979c2e4d6a0_terseLabel_en-US" xlink:label="lab_onit_ForeclosuresAndBankruptcyCostsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreclosures, bankruptcy, REO and other (1)</link:label>
    <link:label id="lab_onit_ForeclosuresAndBankruptcyCostsMember_label_en-US" xlink:label="lab_onit_ForeclosuresAndBankruptcyCostsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreclosures And Bankruptcy Costs [Member]</link:label>
    <link:label id="lab_onit_ForeclosuresAndBankruptcyCostsMember_documentation_en-US" xlink:label="lab_onit_ForeclosuresAndBankruptcyCostsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Advances on foreclosures, bankruptcy and other.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ForeclosuresAndBankruptcyCostsMember" xlink:href="onit-20260331.xsd#onit_ForeclosuresAndBankruptcyCostsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ForeclosuresAndBankruptcyCostsMember" xlink:to="lab_onit_ForeclosuresAndBankruptcyCostsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_OutstandingRecoveryCompAmt_terseLabel_en-US" xlink:label="lab_ecd_OutstandingRecoveryCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Compensation Amount</link:label>
    <link:label id="lab_ecd_OutstandingRecoveryCompAmt_label_en-US" xlink:label="lab_ecd_OutstandingRecoveryCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Outstanding Recovery Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_OutstandingRecoveryCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_OutstandingRecoveryCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_OutstandingRecoveryCompAmt" xlink:to="lab_ecd_OutstandingRecoveryCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentNameDomain_019cc591-a808-7fc8-9068-56980e48be43_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Name [Domain]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentNameDomain_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Name [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentNameDomain" xlink:to="lab_us-gaap_DebtInstrumentNameDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_RecoveryOfErrCompDisclosureLineItems_label_en-US" xlink:label="lab_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Recovery of Erroneously Awarded Compensation Disclosure [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_RecoveryOfErrCompDisclosureLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:to="lab_ecd_RecoveryOfErrCompDisclosureLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019cc591-a891-750a-8357-9e4f0ccbbe7a_terseLabel_en-US" xlink:label="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value</link:label>
    <link:label id="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember_label_en-US" xlink:label="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Estimate of Fair Value Measurement [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:to="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_NumberOfReverseMortgageServicingRightsSoldNumberOfLoans_019df410-2142-7788-9ca8-dbda6b8d943f_terseLabel_en-US" xlink:label="lab_onit_NumberOfReverseMortgageServicingRightsSoldNumberOfLoans" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number Of Reverse Mortgage Servicing Rights Sold, Number Of Loans</link:label>
    <link:label id="lab_onit_NumberOfReverseMortgageServicingRightsSoldNumberOfLoans_label_en-US" xlink:label="lab_onit_NumberOfReverseMortgageServicingRightsSoldNumberOfLoans" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number Of Reverse Mortgage Servicing Rights Sold, Number Of Loans</link:label>
    <link:label id="lab_onit_NumberOfReverseMortgageServicingRightsSoldNumberOfLoans_documentation_en-US" xlink:label="lab_onit_NumberOfReverseMortgageServicingRightsSoldNumberOfLoans" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number Of Reverse Mortgage Servicing Rights Sold, Number Of Loans</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_NumberOfReverseMortgageServicingRightsSoldNumberOfLoans" xlink:href="onit-20260331.xsd#onit_NumberOfReverseMortgageServicingRightsSoldNumberOfLoans"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_NumberOfReverseMortgageServicingRightsSoldNumberOfLoans" xlink:to="lab_onit_NumberOfReverseMortgageServicingRightsSoldNumberOfLoans" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_MnpiDiscTimedForCompValFlag_terseLabel_en-US" xlink:label="lab_ecd_MnpiDiscTimedForCompValFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MNPI Disclosure Timed for Compensation Value</link:label>
    <link:label id="lab_ecd_MnpiDiscTimedForCompValFlag_label_en-US" xlink:label="lab_ecd_MnpiDiscTimedForCompValFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">MNPI Disclosure Timed for Compensation Value [Flag]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_MnpiDiscTimedForCompValFlag" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_MnpiDiscTimedForCompValFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_MnpiDiscTimedForCompValFlag" xlink:to="lab_ecd_MnpiDiscTimedForCompValFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ScheduleOfAdvancePaymentsByFinancialInstitutionOnForeclosedPropertiesSummaryTableTextBlock_019cc591-a891-74bc-9e07-9d6fa232780e_terseLabel_en-US" xlink:label="lab_onit_ScheduleOfAdvancePaymentsByFinancialInstitutionOnForeclosedPropertiesSummaryTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Advances Paid on Behalf of Borrowers or on Foreclosed Properties</link:label>
    <link:label id="lab_onit_ScheduleOfAdvancePaymentsByFinancialInstitutionOnForeclosedPropertiesSummaryTableTextBlock_label_en-US" xlink:label="lab_onit_ScheduleOfAdvancePaymentsByFinancialInstitutionOnForeclosedPropertiesSummaryTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Advance Payments By Financial Institution On Foreclosed Properties Summary [Table Text Block]</link:label>
    <link:label id="lab_onit_ScheduleOfAdvancePaymentsByFinancialInstitutionOnForeclosedPropertiesSummaryTableTextBlock_documentation_en-US" xlink:label="lab_onit_ScheduleOfAdvancePaymentsByFinancialInstitutionOnForeclosedPropertiesSummaryTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure of accumulated prepayments made by financial institutions on behalf of borrowers for principal, interest, taxes (for example, property taxes) and insurance (for example, property and catastrophe) which will periodically be remitted to the lender, appropriate governmental agency(ies) or vendor(s) on behalf of the borrower.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ScheduleOfAdvancePaymentsByFinancialInstitutionOnForeclosedPropertiesSummaryTableTextBlock" xlink:href="onit-20260331.xsd#onit_ScheduleOfAdvancePaymentsByFinancialInstitutionOnForeclosedPropertiesSummaryTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ScheduleOfAdvancePaymentsByFinancialInstitutionOnForeclosedPropertiesSummaryTableTextBlock" xlink:to="lab_onit_ScheduleOfAdvancePaymentsByFinancialInstitutionOnForeclosedPropertiesSummaryTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherAssetsDisclosureTextBlock_019cc591-a808-7f3d-bc2a-8fcc7f9004cf_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Assets</link:label>
    <link:label id="lab_us-gaap_OtherAssetsDisclosureTextBlock_label_en-US" xlink:label="lab_us-gaap_OtherAssetsDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Assets Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssetsDisclosureTextBlock" xlink:to="lab_us-gaap_OtherAssetsDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInMortgageLoansHeldForSale_019cc591-a891-79ce-a9c4-ae844773a4b7_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInMortgageLoansHeldForSale" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Gain on loans held for sale, net</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInMortgageLoansHeldForSale_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInMortgageLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Loan, Mortgage, Held-for-Sale</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInMortgageLoansHeldForSale" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInMortgageLoansHeldForSale"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInMortgageLoansHeldForSale" xlink:to="lab_us-gaap_IncreaseDecreaseInMortgageLoansHeldForSale" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RevenuesAbstract_019cc591-a808-78bd-a88e-db4ac3179b8c_terseLabel_en-US" xlink:label="lab_us-gaap_RevenuesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revenue</link:label>
    <link:label id="lab_us-gaap_RevenuesAbstract_label_en-US" xlink:label="lab_us-gaap_RevenuesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenues [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenuesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenuesAbstract" xlink:to="lab_us-gaap_RevenuesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommitmentsDisclosureTextBlock_019cc591-a808-7326-8710-0d3c2434db49_verboseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Commitments</link:label>
    <link:label id="lab_us-gaap_CommitmentsDisclosureTextBlock_label_en-US" xlink:label="lab_us-gaap_CommitmentsDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commitments Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsDisclosureTextBlock" xlink:to="lab_us-gaap_CommitmentsDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_OLITAssetBackedNotesSeries2024HB1Member_019dd4cb-acf1-7406-8062-02a3af3a3a95_terseLabel_en-US" xlink:label="lab_onit_OLITAssetBackedNotesSeries2024HB1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OLIT Asset-Backed Notes, Series 2024-HB1</link:label>
    <link:label id="lab_onit_OLITAssetBackedNotesSeries2024HB1Member_label_en-US" xlink:label="lab_onit_OLITAssetBackedNotesSeries2024HB1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">OLIT Asset-Backed Notes, Series 2024-HB1 [Member]</link:label>
    <link:label id="lab_onit_OLITAssetBackedNotesSeries2024HB1Member_documentation_en-US" xlink:label="lab_onit_OLITAssetBackedNotesSeries2024HB1Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">OLIT Asset-Backed Notes, Series 2024-HB1</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OLITAssetBackedNotesSeries2024HB1Member" xlink:href="onit-20260331.xsd#onit_OLITAssetBackedNotesSeries2024HB1Member"/>
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    <link:label id="lab_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_019cc591-a808-72f7-8deb-cfc3072b6b3b_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Assets Held as Collateral Related to Secured Borrowings</link:label>
    <link:label id="lab_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock"/>
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    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019cc591-a808-7bdc-89d8-5541ef553f74_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated other comprehensive loss, net of income taxes</link:label>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss), Net of Tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
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    <link:label id="lab_us-gaap_LongTermPurchaseCommitmentLineItems_019cc591-a75f-7e12-9e66-f3a7943e9aa0_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermPurchaseCommitmentLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term Purchase Commitment [Line Items]</link:label>
    <link:label id="lab_us-gaap_LongTermPurchaseCommitmentLineItems_label_en-US" xlink:label="lab_us-gaap_LongTermPurchaseCommitmentLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Purchase Commitment [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermPurchaseCommitmentLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems" xlink:to="lab_us-gaap_LongTermPurchaseCommitmentLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingAssetsAtFairValueAdditionsRecognizedFromMortgageSales_019cc591-a75f-74d6-97f4-95db9c15937c_terseLabel_en-US" xlink:label="lab_onit_ServicingAssetsAtFairValueAdditionsRecognizedFromMortgageSales" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Recognized on the sale of residential mortgage loans</link:label>
    <link:label id="lab_onit_ServicingAssetsAtFairValueAdditionsRecognizedFromMortgageSales_label_en-US" xlink:label="lab_onit_ServicingAssetsAtFairValueAdditionsRecognizedFromMortgageSales" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Assets At Fair Value Additions Recognized From Mortgage Sales</link:label>
    <link:label id="lab_onit_ServicingAssetsAtFairValueAdditionsRecognizedFromMortgageSales_documentation_en-US" xlink:label="lab_onit_ServicingAssetsAtFairValueAdditionsRecognizedFromMortgageSales" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing assets at fair value, additions recognized from mortgage sales.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingAssetsAtFairValueAdditionsRecognizedFromMortgageSales" xlink:href="onit-20260331.xsd#onit_ServicingAssetsAtFairValueAdditionsRecognizedFromMortgageSales"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingAssetsAtFairValueAdditionsRecognizedFromMortgageSales" xlink:to="lab_onit_ServicingAssetsAtFairValueAdditionsRecognizedFromMortgageSales" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cc591-a808-7af0-b6d0-5a287ad6cc7f_terseLabel_en-US" xlink:label="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Instruments [Domain]</link:label>
    <link:label id="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_label_en-US" xlink:label="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Instruments [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_SubservicingAssetsMember_019cc591-a808-7d3f-8d76-149435cff1a8_terseLabel_en-US" xlink:label="lab_onit_SubservicingAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subservicing Assets</link:label>
    <link:label id="lab_onit_SubservicingAssetsMember_label_en-US" xlink:label="lab_onit_SubservicingAssetsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subservicing Assets [Member]</link:label>
    <link:label id="lab_onit_SubservicingAssetsMember_documentation_en-US" xlink:label="lab_onit_SubservicingAssetsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Subservicing Assets.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_SubservicingAssetsMember" xlink:href="onit-20260331.xsd#onit_SubservicingAssetsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_SubservicingAssetsMember" xlink:to="lab_onit_SubservicingAssetsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_InvestorDomain_019cc591-a808-77d1-ae34-83b71809504e_terseLabel_en-US" xlink:label="lab_onit_InvestorDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investor [Domain]</link:label>
    <link:label id="lab_onit_InvestorDomain_label_en-US" xlink:label="lab_onit_InvestorDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investor [Domain]</link:label>
    <link:label id="lab_onit_InvestorDomain_documentation_en-US" xlink:label="lab_onit_InvestorDomain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investor [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_InvestorDomain" xlink:href="onit-20260331.xsd#onit_InvestorDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_InvestorDomain" xlink:to="lab_onit_InvestorDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_019cc591-a891-7a6a-96aa-dcc9ba0a282c_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Purchases and other</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_FinanceOfAmericaReverseLLCMember_019dd4a8-6e33-7682-a7f6-274c083aa328_terseLabel_en-US" xlink:label="lab_onit_FinanceOfAmericaReverseLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Finance of America Reverse LLC</link:label>
    <link:label id="lab_onit_FinanceOfAmericaReverseLLCMember_label_en-US" xlink:label="lab_onit_FinanceOfAmericaReverseLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finance of America Reverse LLC [Member]</link:label>
    <link:label id="lab_onit_FinanceOfAmericaReverseLLCMember_documentation_en-US" xlink:label="lab_onit_FinanceOfAmericaReverseLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Finance of America Reverse LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_FinanceOfAmericaReverseLLCMember" xlink:href="onit-20260331.xsd#onit_FinanceOfAmericaReverseLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_FinanceOfAmericaReverseLLCMember" xlink:to="lab_onit_FinanceOfAmericaReverseLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ProceedsFromSaleOfFinanceReceivablesAccountedForAsFinancing_019cc591-a808-7d4d-befa-1e6d88fd5ebc_terseLabel_en-US" xlink:label="lab_onit_ProceedsFromSaleOfFinanceReceivablesAccountedForAsFinancing" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sale of HECM or reverse mortgages, accounted for as a financing (HMBS-related borrowings)</link:label>
    <link:label id="lab_onit_ProceedsFromSaleOfFinanceReceivablesAccountedForAsFinancing_label_en-US" xlink:label="lab_onit_ProceedsFromSaleOfFinanceReceivablesAccountedForAsFinancing" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds From Sale Of Finance Receivables, Accounted For As Financing</link:label>
    <link:label id="lab_onit_ProceedsFromSaleOfFinanceReceivablesAccountedForAsFinancing_documentation_en-US" xlink:label="lab_onit_ProceedsFromSaleOfFinanceReceivablesAccountedForAsFinancing" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Proceeds From Sale Of Finance Receivables, Accounted For As Financing</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ProceedsFromSaleOfFinanceReceivablesAccountedForAsFinancing" xlink:href="onit-20260331.xsd#onit_ProceedsFromSaleOfFinanceReceivablesAccountedForAsFinancing"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ProceedsFromSaleOfFinanceReceivablesAccountedForAsFinancing" xlink:to="lab_onit_ProceedsFromSaleOfFinanceReceivablesAccountedForAsFinancing" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ScheduleOfCashFlowsRelatedToTransfersAccountedForAsSaleTableTextBlock_019cc591-a891-7e2a-875a-33bdcdde5382_terseLabel_en-US" xlink:label="lab_onit_ScheduleOfCashFlowsRelatedToTransfersAccountedForAsSaleTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Cash Flows Related to Transfers Accounted for as Sales</link:label>
    <link:label id="lab_onit_ScheduleOfCashFlowsRelatedToTransfersAccountedForAsSaleTableTextBlock_label_en-US" xlink:label="lab_onit_ScheduleOfCashFlowsRelatedToTransfersAccountedForAsSaleTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Cash Flows Related To Transfers Accounted For As Sale [Table Text Block]</link:label>
    <link:label id="lab_onit_ScheduleOfCashFlowsRelatedToTransfersAccountedForAsSaleTableTextBlock_documentation_en-US" xlink:label="lab_onit_ScheduleOfCashFlowsRelatedToTransfersAccountedForAsSaleTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule Of Cash Flows Related To Transfers Accounted For As Sale [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ScheduleOfCashFlowsRelatedToTransfersAccountedForAsSaleTableTextBlock" xlink:href="onit-20260331.xsd#onit_ScheduleOfCashFlowsRelatedToTransfersAccountedForAsSaleTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ScheduleOfCashFlowsRelatedToTransfersAccountedForAsSaleTableTextBlock" xlink:to="lab_onit_ScheduleOfCashFlowsRelatedToTransfersAccountedForAsSaleTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AggtPnsnAdjsSvcCstMember_terseLabel_en-US" xlink:label="lab_ecd_AggtPnsnAdjsSvcCstMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate Pension Adjustments Service Cost</link:label>
    <link:label id="lab_ecd_AggtPnsnAdjsSvcCstMember_label_en-US" xlink:label="lab_ecd_AggtPnsnAdjsSvcCstMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aggregate Pension Adjustments Service Cost [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AggtPnsnAdjsSvcCstMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AggtPnsnAdjsSvcCstMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AggtPnsnAdjsSvcCstMember" xlink:to="lab_ecd_AggtPnsnAdjsSvcCstMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_RepaymentOfProceedsFromTransfersAccountedForAsSecuredBorrowingsAssociatedLiabilities_019cc591-a891-7d55-83e9-c05802afc301_negatedLabel_en-US" xlink:label="lab_onit_RepaymentOfProceedsFromTransfersAccountedForAsSecuredBorrowingsAssociatedLiabilities" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Repayment of advance match funded liabilities, net</link:label>
    <link:label id="lab_onit_RepaymentOfProceedsFromTransfersAccountedForAsSecuredBorrowingsAssociatedLiabilities_label_en-US" xlink:label="lab_onit_RepaymentOfProceedsFromTransfersAccountedForAsSecuredBorrowingsAssociatedLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">RepaymentOfProceedsFromTransfersAccountedForAsSecuredBorrowingsAssociatedLiabilities</link:label>
    <link:label id="lab_onit_RepaymentOfProceedsFromTransfersAccountedForAsSecuredBorrowingsAssociatedLiabilities_documentation_en-US" xlink:label="lab_onit_RepaymentOfProceedsFromTransfersAccountedForAsSecuredBorrowingsAssociatedLiabilities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The net cash inflow (outflow) from debt issuances and repayments associated with advances transferred to special purpose entities in transactions accounted for as secured borrowings.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_RepaymentOfProceedsFromTransfersAccountedForAsSecuredBorrowingsAssociatedLiabilities" xlink:href="onit-20260331.xsd#onit_RepaymentOfProceedsFromTransfersAccountedForAsSecuredBorrowingsAssociatedLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_RepaymentOfProceedsFromTransfersAccountedForAsSecuredBorrowingsAssociatedLiabilities" xlink:to="lab_onit_RepaymentOfProceedsFromTransfersAccountedForAsSecuredBorrowingsAssociatedLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_CapitalizationOfAdvancesOnGinnieMaeModifications_019cc591-a808-733a-800f-72ac619e4f2b_terseLabel_en-US" xlink:label="lab_onit_CapitalizationOfAdvancesOnGinnieMaeModifications" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advances (incl. capitalization upon Ginnie Mae modifications)</link:label>
    <link:label id="lab_onit_CapitalizationOfAdvancesOnGinnieMaeModifications_label_en-US" xlink:label="lab_onit_CapitalizationOfAdvancesOnGinnieMaeModifications" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capitalization of Advances on Ginnie Mae Modifications</link:label>
    <link:label id="lab_onit_CapitalizationOfAdvancesOnGinnieMaeModifications_documentation_en-US" xlink:label="lab_onit_CapitalizationOfAdvancesOnGinnieMaeModifications" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Capitalization of advances on Ginnie Mae modifications.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_CapitalizationOfAdvancesOnGinnieMaeModifications" xlink:href="onit-20260331.xsd#onit_CapitalizationOfAdvancesOnGinnieMaeModifications"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_CapitalizationOfAdvancesOnGinnieMaeModifications" xlink:to="lab_onit_CapitalizationOfAdvancesOnGinnieMaeModifications" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInPrepaymentSpeed_019cc591-a891-74c6-a12f-129f9961f571_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInPrepaymentSpeed" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Weighted average prepayment speeds, 10%</link:label>
    <link:label id="lab_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInPrepaymentSpeed_label_en-US" xlink:label="lab_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInPrepaymentSpeed" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Prepayment Speed</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInPrepaymentSpeed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInPrepaymentSpeed"/>
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    <link:label id="lab_srt_MinimumMember_019cc591-a808-7f71-aa88-29e6d6fa696b_terseLabel_en-US" xlink:label="lab_srt_MinimumMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Minimum</link:label>
    <link:label id="lab_srt_MinimumMember_label_en-US" xlink:label="lab_srt_MinimumMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Minimum [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MinimumMember" xlink:to="lab_srt_MinimumMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CashFlowsBetweenTransfereeAndTransferorPurchasesOfPreviouslyTransferredFinancialAssets_019cc591-a891-7278-95c0-6deb86c9ccaa_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_CashFlowsBetweenTransfereeAndTransferorPurchasesOfPreviouslyTransferredFinancialAssets" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Purchases of previously transferred assets, net of claims reimbursed</link:label>
    <link:label id="lab_us-gaap_CashFlowsBetweenTransfereeAndTransferorPurchasesOfPreviouslyTransferredFinancialAssets_label_en-US" xlink:label="lab_us-gaap_CashFlowsBetweenTransfereeAndTransferorPurchasesOfPreviouslyTransferredFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Flows Between Transferor and Transferee, Purchases of Previously Transferred Financial Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowsBetweenTransfereeAndTransferorPurchasesOfPreviouslyTransferredFinancialAssets" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashFlowsBetweenTransfereeAndTransferorPurchasesOfPreviouslyTransferredFinancialAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashFlowsBetweenTransfereeAndTransferorPurchasesOfPreviouslyTransferredFinancialAssets" xlink:to="lab_us-gaap_CashFlowsBetweenTransfereeAndTransferorPurchasesOfPreviouslyTransferredFinancialAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoanCommitmentTerm_019cc591-a891-7d32-892a-673d688c9639_terseLabel_en-US" xlink:label="lab_onit_LoanCommitmentTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loan commitment, term</link:label>
    <link:label id="lab_onit_LoanCommitmentTerm_label_en-US" xlink:label="lab_onit_LoanCommitmentTerm" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loan Commitment, Term</link:label>
    <link:label id="lab_onit_LoanCommitmentTerm_documentation_en-US" xlink:label="lab_onit_LoanCommitmentTerm" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loan Commitment, Term</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoanCommitmentTerm" xlink:href="onit-20260331.xsd#onit_LoanCommitmentTerm"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoanCommitmentTerm" xlink:to="lab_onit_LoanCommitmentTerm" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cc591-a75f-7419-b7ad-99ac06d97da5_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts, Notes, Loans and Financing Receivable [Line Items]</link:label>
    <link:label id="lab_us-gaap_AccountsNotesAndLoansReceivableLineItems_label_en-US" xlink:label="lab_us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounts, Notes, Loans and Financing Receivable [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="lab_us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_CoSelectedMeasureName_terseLabel_en-US" xlink:label="lab_ecd_CoSelectedMeasureName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Company Selected Measure Name</link:label>
    <link:label id="lab_ecd_CoSelectedMeasureName_label_en-US" xlink:label="lab_ecd_CoSelectedMeasureName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Company Selected Measure Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_CoSelectedMeasureName" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_CoSelectedMeasureName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_CoSelectedMeasureName" xlink:to="lab_ecd_CoSelectedMeasureName" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LockoutRestrictionsForSellingOrTransferringMortgageServicingRightsPercentage_019dd99a-de7e-7879-a165-390e0ec415e4_terseLabel_en-US" xlink:label="lab_onit_LockoutRestrictionsForSellingOrTransferringMortgageServicingRightsPercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Lockout Restrictions For Selling Or Transferring Mortgage Servicing Rights, Percentage</link:label>
    <link:label id="lab_onit_LockoutRestrictionsForSellingOrTransferringMortgageServicingRightsPercentage_label_en-US" xlink:label="lab_onit_LockoutRestrictionsForSellingOrTransferringMortgageServicingRightsPercentage" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lockout Restrictions For Selling Or Transferring Mortgage Servicing Rights, Percentage</link:label>
    <link:label id="lab_onit_LockoutRestrictionsForSellingOrTransferringMortgageServicingRightsPercentage_documentation_en-US" xlink:label="lab_onit_LockoutRestrictionsForSellingOrTransferringMortgageServicingRightsPercentage" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Lockout Restrictions For Selling Or Transferring Mortgage Servicing Rights, Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LockoutRestrictionsForSellingOrTransferringMortgageServicingRightsPercentage" xlink:href="onit-20260331.xsd#onit_LockoutRestrictionsForSellingOrTransferringMortgageServicingRightsPercentage"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LockoutRestrictionsForSellingOrTransferringMortgageServicingRightsPercentage" xlink:to="lab_onit_LockoutRestrictionsForSellingOrTransferringMortgageServicingRightsPercentage" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueDisclosureItemAmountsDomain_019cc591-a808-7913-8a06-3a753af17907_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueDisclosureItemAmountsDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Measurement [Domain]</link:label>
    <link:label id="lab_us-gaap_FairValueDisclosureItemAmountsDomain_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosureItemAmountsDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Measurement [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain" xlink:to="lab_us-gaap_FairValueDisclosureItemAmountsDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtDisclosureTextBlock_019cc591-a808-7336-867b-761fb3046b15_terseLabel_en-US" xlink:label="lab_us-gaap_DebtDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Borrowings</link:label>
    <link:label id="lab_us-gaap_DebtDisclosureTextBlock_label_en-US" xlink:label="lab_us-gaap_DebtDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtDisclosureTextBlock" xlink:to="lab_us-gaap_DebtDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TrdArrSecuritiesAggAvailAmt_terseLabel_en-US" xlink:label="lab_ecd_TrdArrSecuritiesAggAvailAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate Available</link:label>
    <link:label id="lab_ecd_TrdArrSecuritiesAggAvailAmt_label_en-US" xlink:label="lab_ecd_TrdArrSecuritiesAggAvailAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Arrangement, Securities Aggregate Available Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrSecuritiesAggAvailAmt" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_TrdArrSecuritiesAggAvailAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TrdArrSecuritiesAggAvailAmt" xlink:to="lab_ecd_TrdArrSecuritiesAggAvailAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockAppreciationRightsSARSMember_terseLabel_en-US" xlink:label="lab_us-gaap_StockAppreciationRightsSARSMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock Appreciation Rights (SARs)</link:label>
    <link:label id="lab_us-gaap_StockAppreciationRightsSARSMember_label_en-US" xlink:label="lab_us-gaap_StockAppreciationRightsSARSMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Appreciation Rights (SARs) [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockAppreciationRightsSARSMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockAppreciationRightsSARSMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockAppreciationRightsSARSMember" xlink:to="lab_us-gaap_StockAppreciationRightsSARSMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AssetsMember_019cc591-a891-7a61-8119-999aa9f45e02_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets</link:label>
    <link:label id="lab_us-gaap_AssetsMember_label_en-US" xlink:label="lab_us-gaap_AssetsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsMember" xlink:to="lab_us-gaap_AssetsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_IndemnificationObligationsLiabilityRollForward_019cc591-a808-7a3e-b95c-93fc54fc1912_terseLabel_en-US" xlink:label="lab_onit_IndemnificationObligationsLiabilityRollForward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Indemnification Obligations Liability [Roll Forward]</link:label>
    <link:label id="lab_onit_IndemnificationObligationsLiabilityRollForward_label_en-US" xlink:label="lab_onit_IndemnificationObligationsLiabilityRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Indemnification Obligations Liability [Roll Forward]</link:label>
    <link:label id="lab_onit_IndemnificationObligationsLiabilityRollForward_documentation_en-US" xlink:label="lab_onit_IndemnificationObligationsLiabilityRollForward" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_IndemnificationObligationsLiabilityRollForward" xlink:href="onit-20260331.xsd#onit_IndemnificationObligationsLiabilityRollForward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_IndemnificationObligationsLiabilityRollForward" xlink:to="lab_onit_IndemnificationObligationsLiabilityRollForward" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_OLITAssetBackedNotesSeries2025HB2Member_019dd4cb-acf1-77a5-aacc-8ede979a174e_terseLabel_en-US" xlink:label="lab_onit_OLITAssetBackedNotesSeries2025HB2Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OLIT Asset-Backed Notes, Series 2025-HB2</link:label>
    <link:label id="lab_onit_OLITAssetBackedNotesSeries2025HB2Member_label_en-US" xlink:label="lab_onit_OLITAssetBackedNotesSeries2025HB2Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">OLIT Asset-Backed Notes, Series 2025-HB2 [Member]</link:label>
    <link:label id="lab_onit_OLITAssetBackedNotesSeries2025HB2Member_documentation_en-US" xlink:label="lab_onit_OLITAssetBackedNotesSeries2025HB2Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">OLIT Asset-Backed Notes, Series 2025-HB2</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OLITAssetBackedNotesSeries2025HB2Member" xlink:href="onit-20260331.xsd#onit_OLITAssetBackedNotesSeries2025HB2Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_OLITAssetBackedNotesSeries2025HB2Member" xlink:to="lab_onit_OLITAssetBackedNotesSeries2025HB2Member" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ForwardSalesOfReverseLoansMember_019cc591-a808-72d4-bafe-228207cf31ed_terseLabel_en-US" xlink:label="lab_onit_ForwardSalesOfReverseLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Forward Sales Of Reverse Loans</link:label>
    <link:label id="lab_onit_ForwardSalesOfReverseLoansMember_label_en-US" xlink:label="lab_onit_ForwardSalesOfReverseLoansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Forward Sales Of Reverse Loans [Member]</link:label>
    <link:label id="lab_onit_ForwardSalesOfReverseLoansMember_documentation_en-US" xlink:label="lab_onit_ForwardSalesOfReverseLoansMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Forward Sales Of Reverse Loans</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ForwardSalesOfReverseLoansMember" xlink:href="onit-20260331.xsd#onit_ForwardSalesOfReverseLoansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ForwardSalesOfReverseLoansMember" xlink:to="lab_onit_ForwardSalesOfReverseLoansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ParticipatingMortgageLoansTable_019cc591-a75e-7cdd-8282-be48c71199d6_terseLabel_en-US" xlink:label="lab_us-gaap_ParticipatingMortgageLoansTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Participating Mortgage Loans [Table]</link:label>
    <link:label id="lab_us-gaap_ParticipatingMortgageLoansTable_label_en-US" xlink:label="lab_us-gaap_ParticipatingMortgageLoansTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Participating Mortgage Loans [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ParticipatingMortgageLoansTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ParticipatingMortgageLoansTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ParticipatingMortgageLoansTable" xlink:to="lab_us-gaap_ParticipatingMortgageLoansTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet_019cc591-a808-7d2a-b00a-ca924041e4fc_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate lock commitments</link:label>
    <link:label id="lab_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet_label_en-US" xlink:label="lab_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Assets (Liabilities), at Fair Value, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet" xlink:to="lab_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019cc591-a891-79b4-98c4-9fa824ff2f11_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Diluted (in shares)</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019cc591-a891-72b2-ae64-4aa6057e09c2_verboseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Dilutive weighted average shares of common stock (in shares)</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average Number of Shares Outstanding, Diluted</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:to="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_NonGaapMeasureDescriptionTextBlock_terseLabel_en-US" xlink:label="lab_ecd_NonGaapMeasureDescriptionTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-GAAP Measure Description</link:label>
    <link:label id="lab_ecd_NonGaapMeasureDescriptionTextBlock_label_en-US" xlink:label="lab_ecd_NonGaapMeasureDescriptionTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-GAAP Measure Description [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonGaapMeasureDescriptionTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_NonGaapMeasureDescriptionTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_NonGaapMeasureDescriptionTextBlock" xlink:to="lab_ecd_NonGaapMeasureDescriptionTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeTable_019cc591-a808-70a0-9297-bc6c40c6b4b3_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative [Table]</link:label>
    <link:label id="lab_us-gaap_DerivativeTable_label_en-US" xlink:label="lab_us-gaap_DerivativeTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeTable" xlink:to="lab_us-gaap_DerivativeTable" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesRepayments_019dd4b8-1ab5-7ee7-90a2-e4e8d5fc5e01_negatedTerseLabel_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesRepayments" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Repayments (principal payments received)</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesRepayments_label_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesRepayments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Repayments</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesRepayments_documentation_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesRepayments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Repayments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForSaleReverseMortgagesRepayments" xlink:href="onit-20260331.xsd#onit_LoansHeldForSaleReverseMortgagesRepayments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForSaleReverseMortgagesRepayments" xlink:to="lab_onit_LoansHeldForSaleReverseMortgagesRepayments" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntitySmallBusiness_019cc591-a891-7c81-89f2-9c675f78c2c6_terseLabel_en-US" xlink:label="lab_dei_EntitySmallBusiness" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Small Business</link:label>
    <link:label id="lab_dei_EntitySmallBusiness_label_en-US" xlink:label="lab_dei_EntitySmallBusiness" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Small Business</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntitySmallBusiness"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntitySmallBusiness" xlink:to="lab_dei_EntitySmallBusiness" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeTaxDisclosureAbstract_019cc591-a891-7c61-a6f2-68c5a72e4ced_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Tax Disclosure [Abstract]</link:label>
    <link:label id="lab_us-gaap_IncomeTaxDisclosureAbstract_label_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Disclosure [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxDisclosureAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract" xlink:to="lab_us-gaap_IncomeTaxDisclosureAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_IndemnificationObligationsLiabilityChargeOffs_019cc591-a891-7d48-a5ab-50c8e5a7c135_negatedTerseLabel_en-US" xlink:label="lab_onit_IndemnificationObligationsLiabilityChargeOffs" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Charge-offs and other</link:label>
    <link:label id="lab_onit_IndemnificationObligationsLiabilityChargeOffs_label_en-US" xlink:label="lab_onit_IndemnificationObligationsLiabilityChargeOffs" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Indemnification Obligations Liability Charge Offs</link:label>
    <link:label id="lab_onit_IndemnificationObligationsLiabilityChargeOffs_documentation_en-US" xlink:label="lab_onit_IndemnificationObligationsLiabilityChargeOffs" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents amount of charge-offs against indemnification obligations liability.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_IndemnificationObligationsLiabilityChargeOffs" xlink:href="onit-20260331.xsd#onit_IndemnificationObligationsLiabilityChargeOffs"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_IndemnificationObligationsLiabilityChargeOffs" xlink:to="lab_onit_IndemnificationObligationsLiabilityChargeOffs" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentTransitionReport_019cc591-a75e-7ad0-a2af-03248d16e884_terseLabel_en-US" xlink:label="lab_dei_DocumentTransitionReport" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Transition Report</link:label>
    <link:label id="lab_dei_DocumentTransitionReport_label_en-US" xlink:label="lab_dei_DocumentTransitionReport" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Transition Report</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentTransitionReport"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentTransitionReport" xlink:to="lab_dei_DocumentTransitionReport" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherCommitmentsAbstract_019cc591-a891-7bdc-923e-8d8196705ef4_terseLabel_en-US" xlink:label="lab_us-gaap_OtherCommitmentsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Commitments [Abstract]</link:label>
    <link:label id="lab_us-gaap_OtherCommitmentsAbstract_label_en-US" xlink:label="lab_us-gaap_OtherCommitmentsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Commitments [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitmentsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherCommitmentsAbstract" xlink:to="lab_us-gaap_OtherCommitmentsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardUndrlygSecuritiesAmt_terseLabel_en-US" xlink:label="lab_ecd_AwardUndrlygSecuritiesAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Underlying Securities</link:label>
    <link:label id="lab_ecd_AwardUndrlygSecuritiesAmt_label_en-US" xlink:label="lab_ecd_AwardUndrlygSecuritiesAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Underlying Securities Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardUndrlygSecuritiesAmt" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AwardUndrlygSecuritiesAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardUndrlygSecuritiesAmt" xlink:to="lab_ecd_AwardUndrlygSecuritiesAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_PledgedMSRLiabilitiesMember_019cc591-a891-77e3-84dc-258114f77dcb_terseLabel_en-US" xlink:label="lab_onit_PledgedMSRLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pledged MSR Liabilities</link:label>
    <link:label id="lab_onit_PledgedMSRLiabilitiesMember_label_en-US" xlink:label="lab_onit_PledgedMSRLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pledged MSR Liabilities [Member]</link:label>
    <link:label id="lab_onit_PledgedMSRLiabilitiesMember_documentation_en-US" xlink:label="lab_onit_PledgedMSRLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Pledged MSR Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_PledgedMSRLiabilitiesMember" xlink:href="onit-20260331.xsd#onit_PledgedMSRLiabilitiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_PledgedMSRLiabilitiesMember" xlink:to="lab_onit_PledgedMSRLiabilitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EquityComponentDomain_019cc591-a808-7f17-8899-960bf02f055f_terseLabel_en-US" xlink:label="lab_us-gaap_EquityComponentDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Component [Domain]</link:label>
    <link:label id="lab_us-gaap_EquityComponentDomain_label_en-US" xlink:label="lab_us-gaap_EquityComponentDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Component [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityComponentDomain" xlink:to="lab_us-gaap_EquityComponentDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentPeriodEndDate_019cc591-a808-786a-94ad-da5fc1c6906b_terseLabel_en-US" xlink:label="lab_dei_DocumentPeriodEndDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Period End Date</link:label>
    <link:label id="lab_dei_DocumentPeriodEndDate_label_en-US" xlink:label="lab_dei_DocumentPeriodEndDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Period End Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentPeriodEndDate" xlink:to="lab_dei_DocumentPeriodEndDate" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_IndemnificationObligationsLiabilityReserves_019cc591-a891-7e8e-833a-6ac71a0f6c57_terseLabel_en-US" xlink:label="lab_onit_IndemnificationObligationsLiabilityReserves" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Provision for representation and warranty obligations - New production liability</link:label>
    <link:label id="lab_onit_IndemnificationObligationsLiabilityReserves_label_en-US" xlink:label="lab_onit_IndemnificationObligationsLiabilityReserves" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Indemnification Obligations Liability Reserves</link:label>
    <link:label id="lab_onit_IndemnificationObligationsLiabilityReserves_documentation_en-US" xlink:label="lab_onit_IndemnificationObligationsLiabilityReserves" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents addition of indemnification obligations reserves for new loan production during the period.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_IndemnificationObligationsLiabilityReserves" xlink:href="onit-20260331.xsd#onit_IndemnificationObligationsLiabilityReserves"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_IndemnificationObligationsLiabilityReserves" xlink:to="lab_onit_IndemnificationObligationsLiabilityReserves" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeTaxDisclosureTextBlock_019cc591-a891-7c3c-9990-88d5e183a48f_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Taxes</link:label>
    <link:label id="lab_us-gaap_IncomeTaxDisclosureTextBlock_label_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxDisclosureTextBlock" xlink:to="lab_us-gaap_IncomeTaxDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentUnamortizedPremium_019dd4d1-1ce8-7e95-ad63-79362855442f_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnamortizedPremium" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unamortized premium</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentUnamortizedPremium_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnamortizedPremium" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Unamortized Premium</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedPremium" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentUnamortizedPremium"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentUnamortizedPremium" xlink:to="lab_us-gaap_DebtInstrumentUnamortizedPremium" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromLinesOfCredit_019cc591-a891-7262-902d-18f9f2c2efaf_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromLinesOfCredit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from Lines of Credit</link:label>
    <link:label id="lab_us-gaap_ProceedsFromLinesOfCredit_label_en-US" xlink:label="lab_us-gaap_ProceedsFromLinesOfCredit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Lines of Credit</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLinesOfCredit" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromLinesOfCredit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromLinesOfCredit" xlink:to="lab_us-gaap_ProceedsFromLinesOfCredit" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardsCloseToMnpiDiscTableTextBlock_terseLabel_en-US" xlink:label="lab_ecd_AwardsCloseToMnpiDiscTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Awards Close in Time to MNPI Disclosures, Table</link:label>
    <link:label id="lab_ecd_AwardsCloseToMnpiDiscTableTextBlock_label_en-US" xlink:label="lab_ecd_AwardsCloseToMnpiDiscTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Awards Close in Time to MNPI Disclosures [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardsCloseToMnpiDiscTableTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AwardsCloseToMnpiDiscTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardsCloseToMnpiDiscTableTextBlock" xlink:to="lab_ecd_AwardsCloseToMnpiDiscTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LitigationReserveNoncurrent_019cc591-a75f-789e-a811-e0813a0911ac_terseLabel_en-US" xlink:label="lab_us-gaap_LitigationReserveNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accrued legal fees and settlements</link:label>
    <link:label id="lab_us-gaap_LitigationReserveNoncurrent_label_en-US" xlink:label="lab_us-gaap_LitigationReserveNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Estimated Litigation Liability, Noncurrent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationReserveNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LitigationReserveNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LitigationReserveNoncurrent" xlink:to="lab_us-gaap_LitigationReserveNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019cc591-a891-7059-9b49-e0885110f76c_totalLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total stockholders&#8217; equity</link:label>
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    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019cc591-a891-7532-808f-f60aa5f888bb_periodEndLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity, Including Portion Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
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    <link:label id="lab_us-gaap_TreasuryStockAcquiredAverageCostPerShare_019dd4dd-ce33-7df4-9f60-b904bc22070b_terseLabel_en-US" xlink:label="lab_us-gaap_TreasuryStockAcquiredAverageCostPerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shares acquired, average cost per share</link:label>
    <link:label id="lab_us-gaap_TreasuryStockAcquiredAverageCostPerShare_label_en-US" xlink:label="lab_us-gaap_TreasuryStockAcquiredAverageCostPerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Shares Acquired, Average Cost Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockAcquiredAverageCostPerShare"/>
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    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets_019cc591-a75f-720e-9892-283c026b0782_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Increase in receivables and other assets</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Accounts Receivable and Other Operating Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets"/>
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    <link:label id="lab_onit_ServicingAssetAtFairValuePledgedFinancingLiabilityDerecognition_019cc591-a75f-7afb-b648-e6fb0b17fe11_negatedTerseLabel_en-US" xlink:label="lab_onit_ServicingAssetAtFairValuePledgedFinancingLiabilityDerecognition" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">MSR related financing liability, at fair value - MSR pledged liability</link:label>
    <link:label id="lab_onit_ServicingAssetAtFairValuePledgedFinancingLiabilityDerecognition_label_en-US" xlink:label="lab_onit_ServicingAssetAtFairValuePledgedFinancingLiabilityDerecognition" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset At Fair Value, Pledged Financing Liability, Derecognition</link:label>
    <link:label id="lab_onit_ServicingAssetAtFairValuePledgedFinancingLiabilityDerecognition_documentation_en-US" xlink:label="lab_onit_ServicingAssetAtFairValuePledgedFinancingLiabilityDerecognition" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing Asset At Fair Value, Pledged Financing Liability, Derecognition</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingAssetAtFairValuePledgedFinancingLiabilityDerecognition" xlink:href="onit-20260331.xsd#onit_ServicingAssetAtFairValuePledgedFinancingLiabilityDerecognition"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingAssetAtFairValuePledgedFinancingLiabilityDerecognition" xlink:to="lab_onit_ServicingAssetAtFairValuePledgedFinancingLiabilityDerecognition" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentType_019cc591-a808-73f6-8cba-582549a8681e_terseLabel_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Type</link:label>
    <link:label id="lab_dei_DocumentType_label_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Type</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType"/>
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    <link:label id="lab_us-gaap_FairValueInputsLevel3Member_019cc591-a808-719b-a14d-917675bba481_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel3Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Level 3</link:label>
    <link:label id="lab_us-gaap_FairValueInputsLevel3Member_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel3Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 3 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel3Member" xlink:to="lab_us-gaap_FairValueInputsLevel3Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EarningsPerShareTextBlock_019cc591-a891-7b33-a60d-75fdae542758_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Basic and Diluted Earnings per Share</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareTextBlock_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareTextBlock"/>
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    <link:label id="lab_ecd_OutstandingRecoveryIndName_terseLabel_en-US" xlink:label="lab_ecd_OutstandingRecoveryIndName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Name</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ecd_OutstandingRecoveryIndName" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_OutstandingRecoveryIndName"/>
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    <link:label id="lab_us-gaap_AdditionalPaidInCapital_019cc591-a891-7852-9c3b-a5322910b836_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapital" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Additional paid-in capital</link:label>
    <link:label id="lab_us-gaap_AdditionalPaidInCapital_label_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapital" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Additional Paid in Capital</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdditionalPaidInCapital" xlink:to="lab_us-gaap_AdditionalPaidInCapital" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesReceivablesNet_019cc591-a808-7f23-8442-121752ab01ca_negatedTerseLabel_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesReceivablesNet" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Receivables, net</link:label>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesReceivablesNet_label_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesReceivablesNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Investment, Reverse Mortgages, Receivables, net</link:label>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesReceivablesNet_documentation_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesReceivablesNet" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of loans held for investment, reverse mortgages transferred to receivables during the period.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForInvestmentReverseMortgagesReceivablesNet" xlink:href="onit-20260331.xsd#onit_LoansHeldForInvestmentReverseMortgagesReceivablesNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForInvestmentReverseMortgagesReceivablesNet" xlink:to="lab_onit_LoansHeldForInvestmentReverseMortgagesReceivablesNet" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_BrokersAndDealersAbstract_019cc591-a808-72b0-a625-1cfab8141318_terseLabel_en-US" xlink:label="lab_srt_BrokersAndDealersAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Brokers and Dealers [Abstract]</link:label>
    <link:label id="lab_srt_BrokersAndDealersAbstract_label_en-US" xlink:label="lab_srt_BrokersAndDealersAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Broker-Dealer [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_BrokersAndDealersAbstract" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_BrokersAndDealersAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_BrokersAndDealersAbstract" xlink:to="lab_srt_BrokersAndDealersAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_RangeAxis_019cc591-a891-73c9-b103-9a778711d2c0_terseLabel_en-US" xlink:label="lab_srt_RangeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statistical Measurement [Axis]</link:label>
    <link:label id="lab_srt_RangeAxis_label_en-US" xlink:label="lab_srt_RangeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statistical Measurement [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
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    <link:label id="lab_us-gaap_OtherLiabilitiesDisclosureAbstract_019cc591-a891-7171-ba7a-35a9b685b2be_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Liabilities Disclosure [Abstract]</link:label>
    <link:label id="lab_us-gaap_OtherLiabilitiesDisclosureAbstract_label_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Liabilities Disclosure [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesDisclosureAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesDisclosureAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLiabilitiesDisclosureAbstract" xlink:to="lab_us-gaap_OtherLiabilitiesDisclosureAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LossContingencyAccrualAtCarryingValue_019cc591-a808-7caa-99a9-07dfad80354c_verboseLabel_en-US" xlink:label="lab_us-gaap_LossContingencyAccrualAtCarryingValue" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Accrued penalty</link:label>
    <link:label id="lab_us-gaap_LossContingencyAccrualAtCarryingValue_label_en-US" xlink:label="lab_us-gaap_LossContingencyAccrualAtCarryingValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loss Contingency Accrual</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyAccrualAtCarryingValue" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingencyAccrualAtCarryingValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingencyAccrualAtCarryingValue" xlink:to="lab_us-gaap_LossContingencyAccrualAtCarryingValue" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_StockRepurchaseProgramAuthorizedAmount1_019dd4db-246d-776b-b3b1-029ebc3d241c_terseLabel_en-US" xlink:label="lab_srt_StockRepurchaseProgramAuthorizedAmount1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share Repurchase Program, Authorized, Amount</link:label>
    <link:label id="lab_srt_StockRepurchaseProgramAuthorizedAmount1_label_en-US" xlink:label="lab_srt_StockRepurchaseProgramAuthorizedAmount1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share Repurchase Program, Authorized, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StockRepurchaseProgramAuthorizedAmount1" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_StockRepurchaseProgramAuthorizedAmount1" xlink:to="lab_srt_StockRepurchaseProgramAuthorizedAmount1" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_OLIT2023NotesMember_019cc591-a808-762c-93c5-f7ce9d3051b1_terseLabel_en-US" xlink:label="lab_onit_OLIT2023NotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OLIT 2023 Notes</link:label>
    <link:label id="lab_onit_OLIT2023NotesMember_label_en-US" xlink:label="lab_onit_OLIT2023NotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">OLIT 2023 Notes [Member]</link:label>
    <link:label id="lab_onit_OLIT2023NotesMember_documentation_en-US" xlink:label="lab_onit_OLIT2023NotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">OLIT 2023 Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OLIT2023NotesMember" xlink:href="onit-20260331.xsd#onit_OLIT2023NotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_OLIT2023NotesMember" xlink:to="lab_onit_OLIT2023NotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cc591-a808-7e36-a589-e1f17f4a2192_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Inputs, Assets, Quantitative Information [Line Items]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Measurement Inputs and Valuation Techniques [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AggtErrCompAmt_terseLabel_en-US" xlink:label="lab_ecd_AggtErrCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate Erroneous Compensation Amount</link:label>
    <link:label id="lab_ecd_AggtErrCompAmt_label_en-US" xlink:label="lab_ecd_AggtErrCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aggregate Erroneous Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AggtErrCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AggtErrCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AggtErrCompAmt" xlink:to="lab_ecd_AggtErrCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_MortgageLoansOnRealEstateFaceAmountOfMortgages_019cc591-a808-7974-bafa-24188e5f4d72_terseLabel_en-US" xlink:label="lab_srt_MortgageLoansOnRealEstateFaceAmountOfMortgages" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">UPB of rights to MSRs sold</link:label>
    <link:label id="lab_srt_MortgageLoansOnRealEstateFaceAmountOfMortgages_label_en-US" xlink:label="lab_srt_MortgageLoansOnRealEstateFaceAmountOfMortgages" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MortgageLoansOnRealEstateFaceAmountOfMortgages" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MortgageLoansOnRealEstateFaceAmountOfMortgages"/>
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    <link:label id="lab_us-gaap_ScheduleOfOtherAssetsTableTextBlock_019cc591-a808-70cf-b8f4-549830e534d0_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfOtherAssetsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Other Assets</link:label>
    <link:label id="lab_us-gaap_ScheduleOfOtherAssetsTableTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfOtherAssetsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Other Assets [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfOtherAssetsTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfOtherAssetsTableTextBlock"/>
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    <link:label id="lab_ecd_PeerGroupIssuersFnTextBlock_terseLabel_en-US" xlink:label="lab_ecd_PeerGroupIssuersFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Peer Group Issuers, Footnote</link:label>
    <link:label id="lab_ecd_PeerGroupIssuersFnTextBlock_label_en-US" xlink:label="lab_ecd_PeerGroupIssuersFnTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Peer Group Issuers, Footnote [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeerGroupIssuersFnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_PeerGroupIssuersFnTextBlock"/>
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    <link:label id="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_019cc591-a808-73b8-be88-72d2825a1b84_totalLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net income attributable to common stockholders</link:label>
    <link:label id="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_019cc591-a808-768f-baa9-edad2613bcf6_terseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net Income (Loss) Available to Common Stockholders, Basic</link:label>
    <link:label id="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_label_en-US" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss) Available to Common Stockholders, Basic</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:to="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ParticipatingMortgageLoansLineItems_019cc591-a891-7f7e-8fcb-0ca3524f7253_terseLabel_en-US" xlink:label="lab_us-gaap_ParticipatingMortgageLoansLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Participating Mortgage Loans [Line Items]</link:label>
    <link:label id="lab_us-gaap_ParticipatingMortgageLoansLineItems_label_en-US" xlink:label="lab_us-gaap_ParticipatingMortgageLoansLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Participating Mortgage Loans [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ParticipatingMortgageLoansLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ParticipatingMortgageLoansLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ParticipatingMortgageLoansLineItems" xlink:to="lab_us-gaap_ParticipatingMortgageLoansLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019cc591-a75e-7e35-b4dd-0d1fd04acc6a_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive income, net of income taxes</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
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    <link:label id="lab_us-gaap_FinancingReceivablePercentPastDue1_019cc591-a891-72a0-aee3-8d43221807d4_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivablePercentPastDue1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percent of aggregate unpaid principal balance</link:label>
    <link:label id="lab_us-gaap_FinancingReceivablePercentPastDue1_label_en-US" xlink:label="lab_us-gaap_FinancingReceivablePercentPastDue1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Percent Past Due</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePercentPastDue1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePercentPastDue1"/>
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    <link:label id="lab_us-gaap_OtherLiabilitiesFairValueDisclosure_019cc591-a808-756d-b91d-31ba46852140_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other liabilities, fair value</link:label>
    <link:label id="lab_us-gaap_OtherLiabilitiesFairValueDisclosure_label_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Liabilities, Fair Value Disclosure</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesFairValueDisclosure" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesFairValueDisclosure"/>
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    <link:label id="lab_us-gaap_FairValueInputsLevel1Member_019cc591-a808-74bd-ab0a-b3a095dd7e71_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Level 1</link:label>
    <link:label id="lab_us-gaap_FairValueInputsLevel1Member_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel1Member" xlink:to="lab_us-gaap_FairValueInputsLevel1Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCredit_019cc591-a808-7944-9a87-622fa08b8ea9_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCredit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MSR financing facilities, net</link:label>
    <link:label id="lab_us-gaap_LineOfCredit_019cc591-a808-72b8-aa83-c0646e60827e_verboseLabel_en-US" xlink:label="lab_us-gaap_LineOfCredit" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">MSR financing facilities</link:label>
    <link:label id="lab_us-gaap_LineOfCredit_label_en-US" xlink:label="lab_us-gaap_LineOfCredit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Line of Credit</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCredit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCredit" xlink:to="lab_us-gaap_LineOfCredit" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherAssetsAbstract_019cc591-a808-7531-8bb3-c33d77af9ba4_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Assets [Abstract]</link:label>
    <link:label id="lab_us-gaap_OtherAssetsAbstract_label_en-US" xlink:label="lab_us-gaap_OtherAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Assets [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssetsAbstract" xlink:to="lab_us-gaap_OtherAssetsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_TRATradesAndInterestRateFuturesMember_019df355-e5ac-75f4-969c-3d7299aa336f_terseLabel_en-US" xlink:label="lab_onit_TRATradesAndInterestRateFuturesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">TRA Trades And Interest Rate Futures</link:label>
    <link:label id="lab_onit_TRATradesAndInterestRateFuturesMember_label_en-US" xlink:label="lab_onit_TRATradesAndInterestRateFuturesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">TRA Trades And Interest Rate Futures [Member]</link:label>
    <link:label id="lab_onit_TRATradesAndInterestRateFuturesMember_documentation_en-US" xlink:label="lab_onit_TRATradesAndInterestRateFuturesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">TRA Trades And Interest Rate Futures</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_TRATradesAndInterestRateFuturesMember" xlink:href="onit-20260331.xsd#onit_TRATradesAndInterestRateFuturesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_TRATradesAndInterestRateFuturesMember" xlink:to="lab_onit_TRATradesAndInterestRateFuturesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019cc591-a808-7edb-b5dc-e490d615b936_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_label_en-US" xlink:label="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EarningsPerShareDiluted_019cc591-a75e-7058-9652-17300a4eac4b_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareDiluted" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Diluted (in USD per share)</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareDiluted_019cc591-a75e-75de-ba19-2bf9bebfb030_verboseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareDiluted" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Diluted earnings per share (in USD per share)</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareDiluted_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareDiluted" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share, Diluted</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareDiluted" xlink:to="lab_us-gaap_EarningsPerShareDiluted" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ScheduleofInterestExpenseTable_019cc591-a808-7641-804c-08504439e742_terseLabel_en-US" xlink:label="lab_onit_ScheduleofInterestExpenseTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Interest Expense [Table]</link:label>
    <link:label id="lab_onit_ScheduleofInterestExpenseTable_label_en-US" xlink:label="lab_onit_ScheduleofInterestExpenseTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Interest Expense [Table]</link:label>
    <link:label id="lab_onit_ScheduleofInterestExpenseTable_documentation_en-US" xlink:label="lab_onit_ScheduleofInterestExpenseTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of Interest Expense [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ScheduleofInterestExpenseTable" xlink:href="onit-20260331.xsd#onit_ScheduleofInterestExpenseTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ScheduleofInterestExpenseTable" xlink:to="lab_onit_ScheduleofInterestExpenseTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_019cc591-a891-7d69-a2b2-eb89c6ef2ff1_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]</link:label>
    <link:label id="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_label_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_TBAForwardPipelinesTradesMember_019cc591-a808-746f-a1cf-3ecc031940ea_terseLabel_en-US" xlink:label="lab_onit_TBAForwardPipelinesTradesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">TBA Forward Pipelines Trades</link:label>
    <link:label id="lab_onit_TBAForwardPipelinesTradesMember_label_en-US" xlink:label="lab_onit_TBAForwardPipelinesTradesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">TBA Forward Pipelines Trades [Member]</link:label>
    <link:label id="lab_onit_TBAForwardPipelinesTradesMember_documentation_en-US" xlink:label="lab_onit_TBAForwardPipelinesTradesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">TBA Forward Pipelines Trades</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_TBAForwardPipelinesTradesMember" xlink:href="onit-20260331.xsd#onit_TBAForwardPipelinesTradesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_TBAForwardPipelinesTradesMember" xlink:to="lab_onit_TBAForwardPipelinesTradesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_PaymentForExerciseOfCommonStockWarrants_019cc591-a808-717c-a33e-ba567bfd6d2a_negatedTerseLabel_en-US" xlink:label="lab_onit_PaymentForExerciseOfCommonStockWarrants" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Payment on exercise of common stock warrants</link:label>
    <link:label id="lab_onit_PaymentForExerciseOfCommonStockWarrants_label_en-US" xlink:label="lab_onit_PaymentForExerciseOfCommonStockWarrants" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payment For Exercise Of Common Stock Warrants</link:label>
    <link:label id="lab_onit_PaymentForExerciseOfCommonStockWarrants_documentation_en-US" xlink:label="lab_onit_PaymentForExerciseOfCommonStockWarrants" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Payment For Exercise Of Common Stock Warrants</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_PaymentForExerciseOfCommonStockWarrants" xlink:href="onit-20260331.xsd#onit_PaymentForExerciseOfCommonStockWarrants"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_PaymentForExerciseOfCommonStockWarrants" xlink:to="lab_onit_PaymentForExerciseOfCommonStockWarrants" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived_019cc591-a891-7915-86d5-16fd3a8fa62c_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">State</link:label>
    <link:label id="lab_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived_label_en-US" xlink:label="lab_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Paid, State and Local, after Refund Received</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived" xlink:to="lab_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ConsolidationItemsDomain_019cc591-a892-7df6-af09-850661fe0d08_terseLabel_en-US" xlink:label="lab_srt_ConsolidationItemsDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidation Items [Domain]</link:label>
    <link:label id="lab_srt_ConsolidationItemsDomain_label_en-US" xlink:label="lab_srt_ConsolidationItemsDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidation Items [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidationItemsDomain" xlink:to="lab_srt_ConsolidationItemsDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsToAcquireLoansHeldForInvestment_019cc591-a808-7c35-8edc-8a93b78407f0_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireLoansHeldForInvestment" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Origination of loans held for investment</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireLoansHeldForInvestment_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireLoansHeldForInvestment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payment for Acquisition, Loan, Held-for-Investment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireLoansHeldForInvestment" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireLoansHeldForInvestment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireLoansHeldForInvestment" xlink:to="lab_us-gaap_PaymentsToAcquireLoansHeldForInvestment" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_MAVAssetVehicleLLCMember_019cc591-a891-7bbe-9718-5efd9ead02dc_terseLabel_en-US" xlink:label="lab_onit_MAVAssetVehicleLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MAV Asset Vehicle LLC</link:label>
    <link:label id="lab_onit_MAVAssetVehicleLLCMember_label_en-US" xlink:label="lab_onit_MAVAssetVehicleLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">MAV Asset Vehicle LLC [Member]</link:label>
    <link:label id="lab_onit_MAVAssetVehicleLLCMember_documentation_en-US" xlink:label="lab_onit_MAVAssetVehicleLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">MAV Asset Vehicle LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_MAVAssetVehicleLLCMember" xlink:href="onit-20260331.xsd#onit_MAVAssetVehicleLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_MAVAssetVehicleLLCMember" xlink:to="lab_onit_MAVAssetVehicleLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesOriginations_019cc591-a808-74c5-82f7-77c898718c66_terseLabel_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesOriginations" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Originations</link:label>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesOriginations_label_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesOriginations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Investment, Reverse Mortgages, Originations</link:label>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesOriginations_documentation_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesOriginations" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of loans held for investment, reverse mortgages originated during the period.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForInvestmentReverseMortgagesOriginations" xlink:href="onit-20260331.xsd#onit_LoansHeldForInvestmentReverseMortgagesOriginations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForInvestmentReverseMortgagesOriginations" xlink:to="lab_onit_LoansHeldForInvestmentReverseMortgagesOriginations" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueAdditions_019cc591-a75f-7d64-a2d6-30cd252e8b5a_terseLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueAdditions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Purchases of MSRs</link:label>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueAdditions_label_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueAdditions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset at Fair Value, Additions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueAdditions" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueAdditions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingAssetAtFairValueAdditions" xlink:to="lab_us-gaap_ServicingAssetAtFairValueAdditions" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_DebtInstrumentMandatoryCallPeriod_019cc591-a75f-7e1a-92b4-1d9069499e3b_terseLabel_en-US" xlink:label="lab_onit_DebtInstrumentMandatoryCallPeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Mandatory Call Period</link:label>
    <link:label id="lab_onit_DebtInstrumentMandatoryCallPeriod_label_en-US" xlink:label="lab_onit_DebtInstrumentMandatoryCallPeriod" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Mandatory Call Period</link:label>
    <link:label id="lab_onit_DebtInstrumentMandatoryCallPeriod_documentation_en-US" xlink:label="lab_onit_DebtInstrumentMandatoryCallPeriod" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instrument, Mandatory Call Period</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_DebtInstrumentMandatoryCallPeriod" xlink:href="onit-20260331.xsd#onit_DebtInstrumentMandatoryCallPeriod"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_DebtInstrumentMandatoryCallPeriod" xlink:to="lab_onit_DebtInstrumentMandatoryCallPeriod" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PrepaidExpenseCurrentAndNoncurrent_019cc591-a808-7c0c-bbd0-6b65689300b3_terseLabel_en-US" xlink:label="lab_us-gaap_PrepaidExpenseCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Prepaid expenses (including prepaid lender fees)</link:label>
    <link:label id="lab_us-gaap_PrepaidExpenseCurrentAndNoncurrent_label_en-US" xlink:label="lab_us-gaap_PrepaidExpenseCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Prepaid Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseCurrentAndNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseCurrentAndNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PrepaidExpenseCurrentAndNoncurrent" xlink:to="lab_us-gaap_PrepaidExpenseCurrentAndNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PublicUtilitiesGeneralDisclosuresTable_019cc591-a808-7a13-8089-fa629f8de732_terseLabel_en-US" xlink:label="lab_us-gaap_PublicUtilitiesGeneralDisclosuresTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Public Utilities General Disclosures [Table]</link:label>
    <link:label id="lab_us-gaap_PublicUtilitiesGeneralDisclosuresTable_label_en-US" xlink:label="lab_us-gaap_PublicUtilitiesGeneralDisclosuresTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Public Utilities General Disclosures [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PublicUtilitiesGeneralDisclosuresTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable" xlink:to="lab_us-gaap_PublicUtilitiesGeneralDisclosuresTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cc591-a808-788f-9219-8554a911cdac_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivablePortfolioSegmentAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable Portfolio Segment [Axis]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivablePortfolioSegmentAxis_label_en-US" xlink:label="lab_us-gaap_FinancingReceivablePortfolioSegmentAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable Portfolio Segment [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis" xlink:to="lab_us-gaap_FinancingReceivablePortfolioSegmentAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingAssetTerm_019dd4a8-6e33-7dc3-ae92-e463d0a80f8e_terseLabel_en-US" xlink:label="lab_onit_ServicingAssetTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing asset, term</link:label>
    <link:label id="lab_onit_ServicingAssetTerm_label_en-US" xlink:label="lab_onit_ServicingAssetTerm" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset, Term</link:label>
    <link:label id="lab_onit_ServicingAssetTerm_documentation_en-US" xlink:label="lab_onit_ServicingAssetTerm" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing Asset, Term</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingAssetTerm" xlink:href="onit-20260331.xsd#onit_ServicingAssetTerm"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingAssetTerm" xlink:to="lab_onit_ServicingAssetTerm" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_TransferredMSRsIncludingESS_019cc591-a891-722e-904a-ecf25e78f790_terseLabel_en-US" xlink:label="lab_onit_TransferredMSRsIncludingESS" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Transferred MSRs, Including ESS</link:label>
    <link:label id="lab_onit_TransferredMSRsIncludingESS_label_en-US" xlink:label="lab_onit_TransferredMSRsIncludingESS" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Transferred MSRs, Including ESS</link:label>
    <link:label id="lab_onit_TransferredMSRsIncludingESS_documentation_en-US" xlink:label="lab_onit_TransferredMSRsIncludingESS" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Transferred MSRs, Including ESS</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_TransferredMSRsIncludingESS" xlink:href="onit-20260331.xsd#onit_TransferredMSRsIncludingESS"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_TransferredMSRsIncludingESS" xlink:to="lab_onit_TransferredMSRsIncludingESS" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_SeniorNotesDue2029Member_019cc591-a808-7013-b3f7-cd1e39d93ea7_terseLabel_en-US" xlink:label="lab_onit_SeniorNotesDue2029Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Senior Notes Due 2029</link:label>
    <link:label id="lab_onit_SeniorNotesDue2029Member_label_en-US" xlink:label="lab_onit_SeniorNotesDue2029Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Senior Notes Due 2029 [Member]</link:label>
    <link:label id="lab_onit_SeniorNotesDue2029Member_documentation_en-US" xlink:label="lab_onit_SeniorNotesDue2029Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Senior Notes Due 2029</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_SeniorNotesDue2029Member" xlink:href="onit-20260331.xsd#onit_SeniorNotesDue2029Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_SeniorNotesDue2029Member" xlink:to="lab_onit_SeniorNotesDue2029Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeTaxesPaidNet_019cc591-a808-76b1-8e03-bb2d3a1722ea_totalLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaidNet" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Income tax payments (refunds), net</link:label>
    <link:label id="lab_us-gaap_IncomeTaxesPaidNet_label_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaidNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Taxes Paid, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesPaidNet" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxesPaidNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxesPaidNet" xlink:to="lab_us-gaap_IncomeTaxesPaidNet" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TemporaryEquitySharesIssued_019cc591-a75f-7727-9ff8-7e2809e51b5a_terseLabel_en-US" xlink:label="lab_us-gaap_TemporaryEquitySharesIssued" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Temporary Equity, Shares Issued</link:label>
    <link:label id="lab_us-gaap_TemporaryEquitySharesIssued_label_en-US" xlink:label="lab_us-gaap_TemporaryEquitySharesIssued" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Temporary Equity, Shares Issued</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquitySharesIssued" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquitySharesIssued"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TemporaryEquitySharesIssued" xlink:to="lab_us-gaap_TemporaryEquitySharesIssued" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ChangeInValueOfHomeEquityConversionMortgageBackedSecurityRepurchasesValue_019cc591-a808-79de-9c77-9726b4c7dd42_terseLabel_en-US" xlink:label="lab_onit_ChangeInValueOfHomeEquityConversionMortgageBackedSecurityRepurchasesValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in value, repurchase securities, amount</link:label>
    <link:label id="lab_onit_ChangeInValueOfHomeEquityConversionMortgageBackedSecurityRepurchasesValue_label_en-US" xlink:label="lab_onit_ChangeInValueOfHomeEquityConversionMortgageBackedSecurityRepurchasesValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Change In Value Of Home Equity Conversion Mortgage-Backed Security Repurchases, Value</link:label>
    <link:label id="lab_onit_ChangeInValueOfHomeEquityConversionMortgageBackedSecurityRepurchasesValue_documentation_en-US" xlink:label="lab_onit_ChangeInValueOfHomeEquityConversionMortgageBackedSecurityRepurchasesValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This represents the amount of change in value of HMBS repurchase securities.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ChangeInValueOfHomeEquityConversionMortgageBackedSecurityRepurchasesValue" xlink:href="onit-20260331.xsd#onit_ChangeInValueOfHomeEquityConversionMortgageBackedSecurityRepurchasesValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ChangeInValueOfHomeEquityConversionMortgageBackedSecurityRepurchasesValue" xlink:to="lab_onit_ChangeInValueOfHomeEquityConversionMortgageBackedSecurityRepurchasesValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AccruedLiabilitiesCurrentAndNoncurrent_019cc591-a891-7058-88f4-e1b5896595d8_terseLabel_en-US" xlink:label="lab_us-gaap_AccruedLiabilitiesCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Compensation-related and other accrued expenses</link:label>
    <link:label id="lab_us-gaap_AccruedLiabilitiesCurrentAndNoncurrent_label_en-US" xlink:label="lab_us-gaap_AccruedLiabilitiesCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrentAndNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesCurrentAndNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrentAndNoncurrent" xlink:to="lab_us-gaap_AccruedLiabilitiesCurrentAndNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentCarryingAmount_019cc591-a75f-7835-9f75-ab4619daef6a_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Financing liabilities</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentCarryingAmount_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Debt, Gross</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount" xlink:to="lab_us-gaap_DebtInstrumentCarryingAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAbstract_019cc591-a808-7db0-9472-e804ae6e3f09_terseLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Changes in fair value recognized in earnings:</link:label>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAbstract_label_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset at Fair Value, Changes in Fair Value Resulting from Changes in Valuation Inputs or Changes in Assumptions [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAbstract" xlink:to="lab_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptionsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingAssetsAdditionsRecognizedfromSecuritizationTrustsRelatedToTransfersAccountedForAsSales_019cc591-a891-79ca-b528-6cb61bd9a036_terseLabel_en-US" xlink:label="lab_onit_ServicingAssetsAdditionsRecognizedfromSecuritizationTrustsRelatedToTransfersAccountedForAsSales" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MSRs retained</link:label>
    <link:label id="lab_onit_ServicingAssetsAdditionsRecognizedfromSecuritizationTrustsRelatedToTransfersAccountedForAsSales_019cc591-a891-76cd-81e6-47abef783d86_verboseLabel_en-US" xlink:label="lab_onit_ServicingAssetsAdditionsRecognizedfromSecuritizationTrustsRelatedToTransfersAccountedForAsSales" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">MSRs retained on transfers of forward mortgage loans</link:label>
    <link:label id="lab_onit_ServicingAssetsAdditionsRecognizedfromSecuritizationTrustsRelatedToTransfersAccountedForAsSales_label_en-US" xlink:label="lab_onit_ServicingAssetsAdditionsRecognizedfromSecuritizationTrustsRelatedToTransfersAccountedForAsSales" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Assets, Additions Recognized from Securitization Trusts Related To Transfers Accounted For As Sales</link:label>
    <link:label id="lab_onit_ServicingAssetsAdditionsRecognizedfromSecuritizationTrustsRelatedToTransfersAccountedForAsSales_documentation_en-US" xlink:label="lab_onit_ServicingAssetsAdditionsRecognizedfromSecuritizationTrustsRelatedToTransfersAccountedForAsSales" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of mortgage servicing rights (MSRs) retained in connection with transfer of securitized loans accounted for as sales.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingAssetsAdditionsRecognizedfromSecuritizationTrustsRelatedToTransfersAccountedForAsSales" xlink:href="onit-20260331.xsd#onit_ServicingAssetsAdditionsRecognizedfromSecuritizationTrustsRelatedToTransfersAccountedForAsSales"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingAssetsAdditionsRecognizedfromSecuritizationTrustsRelatedToTransfersAccountedForAsSales" xlink:to="lab_onit_ServicingAssetsAdditionsRecognizedfromSecuritizationTrustsRelatedToTransfersAccountedForAsSales" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_019cc591-a75f-7209-ac07-3c353bd4ccab_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available borrowing capacity based on amount of eligible collateral</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Current Borrowing Capacity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:to="lab_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_DebtInstrumentRemainingBorrowingCapacityCommittedAmount_019cc591-a808-7998-b0ea-3b4911b14100_terseLabel_en-US" xlink:label="lab_onit_DebtInstrumentRemainingBorrowingCapacityCommittedAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Remaining Borrowing Capacity, Committed Amount</link:label>
    <link:label id="lab_onit_DebtInstrumentRemainingBorrowingCapacityCommittedAmount_label_en-US" xlink:label="lab_onit_DebtInstrumentRemainingBorrowingCapacityCommittedAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Remaining Borrowing Capacity, Committed Amount</link:label>
    <link:label id="lab_onit_DebtInstrumentRemainingBorrowingCapacityCommittedAmount_documentation_en-US" xlink:label="lab_onit_DebtInstrumentRemainingBorrowingCapacityCommittedAmount" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instrument, Remaining Borrowing Capacity, Committed Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_DebtInstrumentRemainingBorrowingCapacityCommittedAmount" xlink:href="onit-20260331.xsd#onit_DebtInstrumentRemainingBorrowingCapacityCommittedAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_DebtInstrumentRemainingBorrowingCapacityCommittedAmount" xlink:to="lab_onit_DebtInstrumentRemainingBorrowingCapacityCommittedAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_GinnieMaeLoansMember_019cc591-a75f-7004-8500-6d9f35166af4_terseLabel_en-US" xlink:label="lab_onit_GinnieMaeLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ginnie Mae Loans</link:label>
    <link:label id="lab_onit_GinnieMaeLoansMember_label_en-US" xlink:label="lab_onit_GinnieMaeLoansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ginnie Mae Loans [Member]</link:label>
    <link:label id="lab_onit_GinnieMaeLoansMember_documentation_en-US" xlink:label="lab_onit_GinnieMaeLoansMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ginnie Mae loans.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_GinnieMaeLoansMember" xlink:href="onit-20260331.xsd#onit_GinnieMaeLoansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_GinnieMaeLoansMember" xlink:to="lab_onit_GinnieMaeLoansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TrdArrExpirationDate_terseLabel_en-US" xlink:label="lab_ecd_TrdArrExpirationDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expiration Date</link:label>
    <link:label id="lab_ecd_TrdArrExpirationDate_label_en-US" xlink:label="lab_ecd_TrdArrExpirationDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Arrangement Expiration Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrExpirationDate" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_TrdArrExpirationDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TrdArrExpirationDate" xlink:to="lab_ecd_TrdArrExpirationDate" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_019cc591-a808-7d54-adca-1805d47068d2_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Decrease in other liabilities</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Other Operating Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:to="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProductInformationLineItems_019cc591-a891-7697-a59d-b6ab658f3886_terseLabel_en-US" xlink:label="lab_us-gaap_ProductInformationLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Description of Business and Basis of Presentation [Line Items]</link:label>
    <link:label id="lab_us-gaap_ProductInformationLineItems_label_en-US" xlink:label="lab_us-gaap_ProductInformationLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Product Information [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductInformationLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProductInformationLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProductInformationLineItems" xlink:to="lab_us-gaap_ProductInformationLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_TotalFairValueChangesInServicingLiabilityAtFairValue_019cc591-a808-7ca6-9c68-c73968b337fa_negatedTerseLabel_en-US" xlink:label="lab_onit_TotalFairValueChangesInServicingLiabilityAtFairValue" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Total Fair value changes in Servicing liability at fair value</link:label>
    <link:label id="lab_onit_TotalFairValueChangesInServicingLiabilityAtFairValue_label_en-US" xlink:label="lab_onit_TotalFairValueChangesInServicingLiabilityAtFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Fair value changes in Servicing liability at fair value</link:label>
    <link:label id="lab_onit_TotalFairValueChangesInServicingLiabilityAtFairValue_documentation_en-US" xlink:label="lab_onit_TotalFairValueChangesInServicingLiabilityAtFairValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing Liability at Fair Value, Changes in Fair Value Resulting from Changes in Valuation Inputs or Changes in Assumptions, runoff, settlement and other</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_TotalFairValueChangesInServicingLiabilityAtFairValue" xlink:href="onit-20260331.xsd#onit_TotalFairValueChangesInServicingLiabilityAtFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_TotalFairValueChangesInServicingLiabilityAtFairValue" xlink:to="lab_onit_TotalFairValueChangesInServicingLiabilityAtFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_019cc591-a808-771c-a24b-47c057e4cef5_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Premises and equipment, net</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentNet" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_PrincipalAmountOutstandingOnLoansHeldForSale_019cc591-a808-7f99-aeda-2e786e4b2e0a_terseLabel_en-US" xlink:label="lab_onit_PrincipalAmountOutstandingOnLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Principal amount outstanding on loans held for sale</link:label>
    <link:label id="lab_onit_PrincipalAmountOutstandingOnLoansHeldForSale_label_en-US" xlink:label="lab_onit_PrincipalAmountOutstandingOnLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Principal amount outstanding on loans held for sale</link:label>
    <link:label id="lab_onit_PrincipalAmountOutstandingOnLoansHeldForSale_documentation_en-US" xlink:label="lab_onit_PrincipalAmountOutstandingOnLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Principal amount outstanding on loans held for sale</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_PrincipalAmountOutstandingOnLoansHeldForSale" xlink:href="onit-20260331.xsd#onit_PrincipalAmountOutstandingOnLoansHeldForSale"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_PrincipalAmountOutstandingOnLoansHeldForSale" xlink:to="lab_onit_PrincipalAmountOutstandingOnLoansHeldForSale" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_MovementInLoansHeldForSaleAtFairValueRollForward_019cc591-a808-79d8-bdf9-8cb8e76c93db_terseLabel_en-US" xlink:label="lab_onit_MovementInLoansHeldForSaleAtFairValueRollForward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Movement In Loans Held For Sale At Fair Value [Roll Forward]</link:label>
    <link:label id="lab_onit_MovementInLoansHeldForSaleAtFairValueRollForward_label_en-US" xlink:label="lab_onit_MovementInLoansHeldForSaleAtFairValueRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Movement In Loans Held For Sale At Fair Value [Roll Forward]</link:label>
    <link:label id="lab_onit_MovementInLoansHeldForSaleAtFairValueRollForward_documentation_en-US" xlink:label="lab_onit_MovementInLoansHeldForSaleAtFairValueRollForward" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_MovementInLoansHeldForSaleAtFairValueRollForward" xlink:href="onit-20260331.xsd#onit_MovementInLoansHeldForSaleAtFairValueRollForward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_MovementInLoansHeldForSaleAtFairValueRollForward" xlink:to="lab_onit_MovementInLoansHeldForSaleAtFairValueRollForward" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_HMBSRelatedBorrowingsRepayments_019cc591-a808-76fb-81e4-92eb7b0d2858_terseLabel_en-US" xlink:label="lab_onit_HMBSRelatedBorrowingsRepayments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Repayments (principal payments received)</link:label>
    <link:label id="lab_onit_HMBSRelatedBorrowingsRepayments_label_en-US" xlink:label="lab_onit_HMBSRelatedBorrowingsRepayments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">HMBS Related Borrowings, Repayments</link:label>
    <link:label id="lab_onit_HMBSRelatedBorrowingsRepayments_documentation_en-US" xlink:label="lab_onit_HMBSRelatedBorrowingsRepayments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Principal repayment in connection with home equity conversion mortgage-backed securities related borrowings accounted for as a financing.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_HMBSRelatedBorrowingsRepayments" xlink:href="onit-20260331.xsd#onit_HMBSRelatedBorrowingsRepayments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_HMBSRelatedBorrowingsRepayments" xlink:to="lab_onit_HMBSRelatedBorrowingsRepayments" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_CashFlowsBetweenTransferorAndTransfereeProceedsAndPaymentRelatedToTransfersAccountedForSales_019cc591-a808-72e3-a441-6ee26d2f9985_totalLabel_en-US" xlink:label="lab_onit_CashFlowsBetweenTransferorAndTransfereeProceedsAndPaymentRelatedToTransfersAccountedForSales" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Cash flows between transferor and transferee proceeds and payment related to transfers accounted for sales</link:label>
    <link:label id="lab_onit_CashFlowsBetweenTransferorAndTransfereeProceedsAndPaymentRelatedToTransfersAccountedForSales_label_en-US" xlink:label="lab_onit_CashFlowsBetweenTransferorAndTransfereeProceedsAndPaymentRelatedToTransfersAccountedForSales" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Flows Between Transferor And Transferee, Proceeds And Payment Related To Transfers Accounted For Sales</link:label>
    <link:label id="lab_onit_CashFlowsBetweenTransferorAndTransfereeProceedsAndPaymentRelatedToTransfersAccountedForSales_documentation_en-US" xlink:label="lab_onit_CashFlowsBetweenTransferorAndTransfereeProceedsAndPaymentRelatedToTransfersAccountedForSales" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cash flows between transferor and transferee, proceeds and payment related to transfers accounted for sales.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_CashFlowsBetweenTransferorAndTransfereeProceedsAndPaymentRelatedToTransfersAccountedForSales" xlink:href="onit-20260331.xsd#onit_CashFlowsBetweenTransferorAndTransfereeProceedsAndPaymentRelatedToTransfersAccountedForSales"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_CashFlowsBetweenTransferorAndTransfereeProceedsAndPaymentRelatedToTransfersAccountedForSales" xlink:to="lab_onit_CashFlowsBetweenTransferorAndTransfereeProceedsAndPaymentRelatedToTransfersAccountedForSales" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_CompActuallyPaidVsNetIncomeTextBlock_terseLabel_en-US" xlink:label="lab_ecd_CompActuallyPaidVsNetIncomeTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Compensation Actually Paid vs. Net Income</link:label>
    <link:label id="lab_ecd_CompActuallyPaidVsNetIncomeTextBlock_label_en-US" xlink:label="lab_ecd_CompActuallyPaidVsNetIncomeTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Compensation Actually Paid vs. Net Income [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_CompActuallyPaidVsNetIncomeTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_CompActuallyPaidVsNetIncomeTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_CompActuallyPaidVsNetIncomeTextBlock" xlink:to="lab_ecd_CompActuallyPaidVsNetIncomeTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_RecognitionofGrossRightofuseAsset_019cc591-a891-7048-ae80-900578bf28ce_terseLabel_en-US" xlink:label="lab_onit_RecognitionofGrossRightofuseAsset" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Right-of-use asset</link:label>
    <link:label id="lab_onit_RecognitionofGrossRightofuseAsset_label_en-US" xlink:label="lab_onit_RecognitionofGrossRightofuseAsset" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Recognition of Gross Right-of-use Asset</link:label>
    <link:label id="lab_onit_RecognitionofGrossRightofuseAsset_documentation_en-US" xlink:label="lab_onit_RecognitionofGrossRightofuseAsset" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Recognition of gross right-of-use asset.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_RecognitionofGrossRightofuseAsset" xlink:href="onit-20260331.xsd#onit_RecognitionofGrossRightofuseAsset"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_RecognitionofGrossRightofuseAsset" xlink:to="lab_onit_RecognitionofGrossRightofuseAsset" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityCurrentReportingStatus_019cc591-a891-70a1-93a0-58e9fcb7aa77_terseLabel_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Current Reporting Status</link:label>
    <link:label id="lab_dei_EntityCurrentReportingStatus_label_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Current Reporting Status</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCurrentReportingStatus"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCurrentReportingStatus" xlink:to="lab_dei_EntityCurrentReportingStatus" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ReceivablesAbstract_019cc591-a808-7e9f-a3b0-cbb51c648afc_terseLabel_en-US" xlink:label="lab_us-gaap_ReceivablesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Receivables [Abstract]</link:label>
    <link:label id="lab_us-gaap_ReceivablesAbstract_label_en-US" xlink:label="lab_us-gaap_ReceivablesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Receivables [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivablesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReceivablesAbstract" xlink:to="lab_us-gaap_ReceivablesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeLineItems_019cc591-a891-77a3-be6a-526171cf1460_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative [Line Items]</link:label>
    <link:label id="lab_us-gaap_DerivativeLineItems_label_en-US" xlink:label="lab_us-gaap_DerivativeLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeLineItems" xlink:to="lab_us-gaap_DerivativeLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardsCloseToMnpiDiscTable_terseLabel_en-US" xlink:label="lab_ecd_AwardsCloseToMnpiDiscTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Awards Close in Time to MNPI Disclosures</link:label>
    <link:label id="lab_ecd_AwardsCloseToMnpiDiscTable_label_en-US" xlink:label="lab_ecd_AwardsCloseToMnpiDiscTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Awards Close in Time to MNPI Disclosures [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardsCloseToMnpiDiscTable" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AwardsCloseToMnpiDiscTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardsCloseToMnpiDiscTable" xlink:to="lab_ecd_AwardsCloseToMnpiDiscTable" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_InvestorAxis_019cc591-a808-7faf-904f-3e119bebade5_terseLabel_en-US" xlink:label="lab_onit_InvestorAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investor [Axis]</link:label>
    <link:label id="lab_onit_InvestorAxis_label_en-US" xlink:label="lab_onit_InvestorAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investor [Axis]</link:label>
    <link:label id="lab_onit_InvestorAxis_documentation_en-US" xlink:label="lab_onit_InvestorAxis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investor</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_InvestorAxis" xlink:href="onit-20260331.xsd#onit_InvestorAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_InvestorAxis" xlink:to="lab_onit_InvestorAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ConsolidatedEntitiesDomain_019cc591-a75f-7636-8c65-2c02bfa1f254_terseLabel_en-US" xlink:label="lab_srt_ConsolidatedEntitiesDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidated Entities [Domain]</link:label>
    <link:label id="lab_srt_ConsolidatedEntitiesDomain_label_en-US" xlink:label="lab_srt_ConsolidatedEntitiesDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidated Entities [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidatedEntitiesDomain" xlink:to="lab_srt_ConsolidatedEntitiesDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_FundedAmountInConnectionWithReverseMortgageLoans_019cc591-a891-7772-b00f-e83dca47e858_terseLabel_en-US" xlink:label="lab_onit_FundedAmountInConnectionWithReverseMortgageLoans" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Funded amount in connection with reverse mortgage loans</link:label>
    <link:label id="lab_onit_FundedAmountInConnectionWithReverseMortgageLoans_label_en-US" xlink:label="lab_onit_FundedAmountInConnectionWithReverseMortgageLoans" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Funded Amount In Connection With Reverse Mortgage Loans</link:label>
    <link:label id="lab_onit_FundedAmountInConnectionWithReverseMortgageLoans_documentation_en-US" xlink:label="lab_onit_FundedAmountInConnectionWithReverseMortgageLoans" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Funded amount in connection with reverse mortgage loans.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_FundedAmountInConnectionWithReverseMortgageLoans" xlink:href="onit-20260331.xsd#onit_FundedAmountInConnectionWithReverseMortgageLoans"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_FundedAmountInConnectionWithReverseMortgageLoans" xlink:to="lab_onit_FundedAmountInConnectionWithReverseMortgageLoans" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FinancialInstrumentAxis_019cc591-a808-7922-8927-a5280486f155_terseLabel_en-US" xlink:label="lab_us-gaap_FinancialInstrumentAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Instrument [Axis]</link:label>
    <link:label id="lab_us-gaap_FinancialInstrumentAxis_label_en-US" xlink:label="lab_us-gaap_FinancialInstrumentAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Instrument [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancialInstrumentAxis" xlink:to="lab_us-gaap_FinancialInstrumentAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AcquisitionOfAdvancesInConnectionWithMSRTransactions_019cc591-a891-7b2f-bd8f-f141d0b3fdea_negatedTerseLabel_en-US" xlink:label="lab_onit_AcquisitionOfAdvancesInConnectionWithMSRTransactions" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Acquisition of advances in connection with MSR transactions</link:label>
    <link:label id="lab_onit_AcquisitionOfAdvancesInConnectionWithMSRTransactions_label_en-US" xlink:label="lab_onit_AcquisitionOfAdvancesInConnectionWithMSRTransactions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Acquisition Of Advances In Connection With MSR Transactions</link:label>
    <link:label id="lab_onit_AcquisitionOfAdvancesInConnectionWithMSRTransactions_documentation_en-US" xlink:label="lab_onit_AcquisitionOfAdvancesInConnectionWithMSRTransactions" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Acquisition Of Advances In Connection With MSR Transactions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AcquisitionOfAdvancesInConnectionWithMSRTransactions" xlink:href="onit-20260331.xsd#onit_AcquisitionOfAdvancesInConnectionWithMSRTransactions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AcquisitionOfAdvancesInConnectionWithMSRTransactions" xlink:to="lab_onit_AcquisitionOfAdvancesInConnectionWithMSRTransactions" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StatementOfFinancialPositionAbstract_019cc591-a808-7030-8fb8-239b7fe382a6_terseLabel_en-US" xlink:label="lab_us-gaap_StatementOfFinancialPositionAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement of Financial Position [Abstract]</link:label>
    <link:label id="lab_us-gaap_StatementOfFinancialPositionAbstract_label_en-US" xlink:label="lab_us-gaap_StatementOfFinancialPositionAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Financial Position [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfFinancialPositionAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract" xlink:to="lab_us-gaap_StatementOfFinancialPositionAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ExecutiveCategoryAxis_terseLabel_en-US" xlink:label="lab_ecd_ExecutiveCategoryAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Executive Category:</link:label>
    <link:label id="lab_ecd_ExecutiveCategoryAxis_label_en-US" xlink:label="lab_ecd_ExecutiveCategoryAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Executive Category [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ExecutiveCategoryAxis" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_ExecutiveCategoryAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_ExecutiveCategoryAxis" xlink:to="lab_ecd_ExecutiveCategoryAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingReceivableNet_019cc591-a808-7241-bffa-1f3c711bf460_totalLabel_en-US" xlink:label="lab_onit_ServicingReceivableNet" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Servicing receivable, total</link:label>
    <link:label id="lab_onit_ServicingReceivableNet_label_en-US" xlink:label="lab_onit_ServicingReceivableNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Receivable Net</link:label>
    <link:label id="lab_onit_ServicingReceivableNet_documentation_en-US" xlink:label="lab_onit_ServicingReceivableNet" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amounts due to the servicing business and primarily include reimbursable expenditures due from investors and amounts to be recovered from the custodial accounts of the trustees.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingReceivableNet" xlink:href="onit-20260331.xsd#onit_ServicingReceivableNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingReceivableNet" xlink:to="lab_onit_ServicingReceivableNet" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_CurrentFiscalYearEndDate_019cc591-a891-7f40-840c-2c84bea86ce1_terseLabel_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current Fiscal Year End Date</link:label>
    <link:label id="lab_dei_CurrentFiscalYearEndDate_label_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current Fiscal Year End Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CurrentFiscalYearEndDate" xlink:to="lab_dei_CurrentFiscalYearEndDate" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_MortgageServicingRightsPledgedMember_019cc591-a891-752f-8ec7-0a444bba83f8_terseLabel_en-US" xlink:label="lab_onit_MortgageServicingRightsPledgedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mortgage Servicing Rights Pledged</link:label>
    <link:label id="lab_onit_MortgageServicingRightsPledgedMember_label_en-US" xlink:label="lab_onit_MortgageServicingRightsPledgedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mortgage Servicing Rights Pledged [Member]</link:label>
    <link:label id="lab_onit_MortgageServicingRightsPledgedMember_documentation_en-US" xlink:label="lab_onit_MortgageServicingRightsPledgedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Mortgage servicing rights pledged.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_MortgageServicingRightsPledgedMember" xlink:href="onit-20260331.xsd#onit_MortgageServicingRightsPledgedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_MortgageServicingRightsPledgedMember" xlink:to="lab_onit_MortgageServicingRightsPledgedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgages_019dd3dc-ecc0-7670-9ea0-076cd66eb3d3_terseLabel_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgages" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reverse loans held for sale pooled into Home Equity Conversion Mortgage-Backed Securities (HMBS), at fair value</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgages_019dd97a-5455-727a-84d0-1aef1e2510b2_verboseLabel_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgages" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Reverse loans held for sale pooled into HMBS, at fair value</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgages_019dd989-b073-79f1-9091-decdcbd3e345_periodStartLabel_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgages" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgages_019dd989-e8fc-769c-9b8a-450a8c2a8771_periodEndLabel_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgages" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgages_label_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgages" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Sale Reverse Mortgages</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgages_documentation_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgages" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Held For Sale Reverse Mortgages</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForSaleReverseMortgages" xlink:href="onit-20260331.xsd#onit_LoansHeldForSaleReverseMortgages"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForSaleReverseMortgages" xlink:to="lab_onit_LoansHeldForSaleReverseMortgages" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerNet_019cc591-a75e-70c6-b8f9-279075b1e762_terseLabel_en-US" xlink:label="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ending balance, net</link:label>
    <link:label id="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerNet_label_en-US" xlink:label="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advances Payments On Behalf Of Borrower, Net</link:label>
    <link:label id="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerNet_documentation_en-US" xlink:label="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerNet" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total advance payments made by financial institutions on behalf of borrowers in a servicing relationship.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AdvancesPaymentsOnBehalfOfBorrowerNet" xlink:href="onit-20260331.xsd#onit_AdvancesPaymentsOnBehalfOfBorrowerNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AdvancesPaymentsOnBehalfOfBorrowerNet" xlink:to="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerNet" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ContractuallySpecifiedServicingFeeOwnedServicingRight_019dd4c1-a7f6-774a-b8cf-862eaa58fb08_terseLabel_en-US" xlink:label="lab_onit_ContractuallySpecifiedServicingFeeOwnedServicingRight" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing fee on owned MSR</link:label>
    <link:label id="lab_onit_ContractuallySpecifiedServicingFeeOwnedServicingRight_label_en-US" xlink:label="lab_onit_ContractuallySpecifiedServicingFeeOwnedServicingRight" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contractually Specified Servicing Fee, Owned Servicing Right</link:label>
    <link:label id="lab_onit_ContractuallySpecifiedServicingFeeOwnedServicingRight_documentation_en-US" xlink:label="lab_onit_ContractuallySpecifiedServicingFeeOwnedServicingRight" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Contractually Specified Servicing Fee, Owned Servicing Right</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ContractuallySpecifiedServicingFeeOwnedServicingRight" xlink:href="onit-20260331.xsd#onit_ContractuallySpecifiedServicingFeeOwnedServicingRight"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ContractuallySpecifiedServicingFeeOwnedServicingRight" xlink:to="lab_onit_ContractuallySpecifiedServicingFeeOwnedServicingRight" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToReceivablesNet_019dd987-ae10-77e2-8ca9-10069206541f_terseLabel_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToReceivablesNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Receivables, net</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToReceivablesNet_label_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToReceivablesNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Transfers To Receivables, net</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToReceivablesNet_documentation_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToReceivablesNet" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Transfers To Receivables, net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForSaleReverseMortgagesTransfersToReceivablesNet" xlink:href="onit-20260331.xsd#onit_LoansHeldForSaleReverseMortgagesTransfersToReceivablesNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForSaleReverseMortgagesTransfersToReceivablesNet" xlink:to="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToReceivablesNet" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_019cc591-a891-7e21-9faf-df939d11329e_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Receivables</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock" xlink:to="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProfessionalFees_019cc591-a75f-7c76-bcf7-bf3d6ac62183_terseLabel_en-US" xlink:label="lab_us-gaap_ProfessionalFees" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Professional services</link:label>
    <link:label id="lab_us-gaap_ProfessionalFees_label_en-US" xlink:label="lab_us-gaap_ProfessionalFees" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Professional Fees</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfessionalFees" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfessionalFees"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProfessionalFees" xlink:to="lab_us-gaap_ProfessionalFees" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_UnpaidPrincipalBalanceMember_019cc591-a891-7c1c-93e8-e8aca5dd8ade_terseLabel_en-US" xlink:label="lab_onit_UnpaidPrincipalBalanceMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unpaid Principal Balance</link:label>
    <link:label id="lab_onit_UnpaidPrincipalBalanceMember_label_en-US" xlink:label="lab_onit_UnpaidPrincipalBalanceMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unpaid Principal Balance [Member]</link:label>
    <link:label id="lab_onit_UnpaidPrincipalBalanceMember_documentation_en-US" xlink:label="lab_onit_UnpaidPrincipalBalanceMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Unpaid Principal Balance [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_UnpaidPrincipalBalanceMember" xlink:href="onit-20260331.xsd#onit_UnpaidPrincipalBalanceMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_UnpaidPrincipalBalanceMember" xlink:to="lab_onit_UnpaidPrincipalBalanceMember" xlink:type="arc" order="1"/>
    <link:label id="lab_country_IN_019cc591-a891-751c-ba27-1d2d3acd00f3_terseLabel_en-US" xlink:label="lab_country_IN" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">INDIA</link:label>
    <link:label id="lab_country_IN_label_en-US" xlink:label="lab_country_IN" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">INDIA</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_country_IN" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_IN"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_country_IN" xlink:to="lab_country_IN" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_PHHAssetServicesLLCMember_019cc591-a808-77d7-a105-f761dd92765d_terseLabel_en-US" xlink:label="lab_onit_PHHAssetServicesLLCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PAS</link:label>
    <link:label id="lab_onit_PHHAssetServicesLLCMember_label_en-US" xlink:label="lab_onit_PHHAssetServicesLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PHH Asset Services LLC [Member]</link:label>
    <link:label id="lab_onit_PHHAssetServicesLLCMember_documentation_en-US" xlink:label="lab_onit_PHHAssetServicesLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">PHH Asset Services LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_PHHAssetServicesLLCMember" xlink:href="onit-20260331.xsd#onit_PHHAssetServicesLLCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_PHHAssetServicesLLCMember" xlink:to="lab_onit_PHHAssetServicesLLCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember_terseLabel_en-US" xlink:label="lab_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Awards Adjustments, Excluding Value Reported in Compensation Table</link:label>
    <link:label id="lab_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember_label_en-US" xlink:label="lab_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:to="lab_ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfMortgageServicingRightsMSR_019cc591-a808-7c7d-af48-9262d17a1cd4_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfMortgageServicingRightsMSR" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sale of MSRs</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfMortgageServicingRightsMSR_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfMortgageServicingRightsMSR" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Mortgage Servicing Rights (MSR)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfMortgageServicingRightsMSR" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromSaleOfMortgageServicingRightsMSR"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfMortgageServicingRightsMSR" xlink:to="lab_us-gaap_ProceedsFromSaleOfMortgageServicingRightsMSR" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_FairValueNonAgencyMortgageServicingRightsMember_019cc591-a75f-7dd2-abc4-024536530358_terseLabel_en-US" xlink:label="lab_onit_FairValueNonAgencyMortgageServicingRightsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Non-Agency Mortgage Servicing Rights</link:label>
    <link:label id="lab_onit_FairValueNonAgencyMortgageServicingRightsMember_label_en-US" xlink:label="lab_onit_FairValueNonAgencyMortgageServicingRightsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value NonAgency Mortgage Servicing Rights [Member]</link:label>
    <link:label id="lab_onit_FairValueNonAgencyMortgageServicingRightsMember_documentation_en-US" xlink:label="lab_onit_FairValueNonAgencyMortgageServicingRightsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fair value non-agency mortgage servicing rights.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_FairValueNonAgencyMortgageServicingRightsMember" xlink:href="onit-20260331.xsd#onit_FairValueNonAgencyMortgageServicingRightsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_FairValueNonAgencyMortgageServicingRightsMember" xlink:to="lab_onit_FairValueNonAgencyMortgageServicingRightsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_PurchasesIssuancesSalesAndSettlementsAbstract_019cc591-a891-7d61-9c9b-4c275b6497ec_terseLabel_en-US" xlink:label="lab_onit_PurchasesIssuancesSalesAndSettlementsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Purchases, issuances, sales and settlements</link:label>
    <link:label id="lab_onit_PurchasesIssuancesSalesAndSettlementsAbstract_label_en-US" xlink:label="lab_onit_PurchasesIssuancesSalesAndSettlementsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Purchases, issuances, sales and settlements: [Abstract]</link:label>
    <link:label id="lab_onit_PurchasesIssuancesSalesAndSettlementsAbstract_documentation_en-US" xlink:label="lab_onit_PurchasesIssuancesSalesAndSettlementsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_PurchasesIssuancesSalesAndSettlementsAbstract" xlink:href="onit-20260331.xsd#onit_PurchasesIssuancesSalesAndSettlementsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_PurchasesIssuancesSalesAndSettlementsAbstract" xlink:to="lab_onit_PurchasesIssuancesSalesAndSettlementsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestRateContractMember_019cc591-a891-7e81-a539-803828152c1c_terseLabel_en-US" xlink:label="lab_us-gaap_InterestRateContractMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest Rate Contract</link:label>
    <link:label id="lab_us-gaap_InterestRateContractMember_label_en-US" xlink:label="lab_us-gaap_InterestRateContractMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Contract [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateContractMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestRateContractMember" xlink:to="lab_us-gaap_InterestRateContractMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ServicingLiabilitiesAtFairValueLineItems_019cc591-a75f-7b3f-9da5-3c713061c611_terseLabel_en-US" xlink:label="lab_us-gaap_ServicingLiabilitiesAtFairValueLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing Liabilities at Fair Value [Line Items]</link:label>
    <link:label id="lab_us-gaap_ServicingLiabilitiesAtFairValueLineItems_label_en-US" xlink:label="lab_us-gaap_ServicingLiabilitiesAtFairValueLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Liabilities at Fair Value [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingLiabilitiesAtFairValueLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingLiabilitiesAtFairValueLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingLiabilitiesAtFairValueLineItems" xlink:to="lab_us-gaap_ServicingLiabilitiesAtFairValueLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_OriginationsMember_019cc591-a75f-7857-a9f4-acf836b81d47_terseLabel_en-US" xlink:label="lab_onit_OriginationsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Originations</link:label>
    <link:label id="lab_onit_OriginationsMember_label_en-US" xlink:label="lab_onit_OriginationsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Originations [Member]</link:label>
    <link:label id="lab_onit_OriginationsMember_documentation_en-US" xlink:label="lab_onit_OriginationsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Originations</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OriginationsMember" xlink:href="onit-20260331.xsd#onit_OriginationsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_OriginationsMember" xlink:to="lab_onit_OriginationsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_OLITNoteDiscountAndAmortizationDomain_019cc591-a891-7809-9a1c-be2e9b81351d_terseLabel_en-US" xlink:label="lab_onit_OLITNoteDiscountAndAmortizationDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OLIT Note discount and amortization [Domain]</link:label>
    <link:label id="lab_onit_OLITNoteDiscountAndAmortizationDomain_label_en-US" xlink:label="lab_onit_OLITNoteDiscountAndAmortizationDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">OLIT Note discount and amortization [Domain]</link:label>
    <link:label id="lab_onit_OLITNoteDiscountAndAmortizationDomain_documentation_en-US" xlink:label="lab_onit_OLITNoteDiscountAndAmortizationDomain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">OLIT Note discount and amortization [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OLITNoteDiscountAndAmortizationDomain" xlink:href="onit-20260331.xsd#onit_OLITNoteDiscountAndAmortizationDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_OLITNoteDiscountAndAmortizationDomain" xlink:to="lab_onit_OLITNoteDiscountAndAmortizationDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_country_PH_019cc591-a808-724e-bf97-a0459cee2c8e_terseLabel_en-US" xlink:label="lab_country_PH" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PHILIPPINES</link:label>
    <link:label id="lab_country_PH_label_en-US" xlink:label="lab_country_PH" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PHILIPPINES</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_country_PH" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_PH"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_country_PH" xlink:to="lab_country_PH" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019cc591-a808-710e-9b36-ecf4d117fc50_terseLabel_en-US" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Anti-dilutive Securities (in shares)</link:label>
    <link:label id="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_label_en-US" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:to="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ContractuallySpecifiedServicingAndSubservicingFeesAmountTotal_019cc591-a808-732a-b670-1eade900ff21_totalLabel_en-US" xlink:label="lab_onit_ContractuallySpecifiedServicingAndSubservicingFeesAmountTotal" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Servicing and Subservicing fees, total</link:label>
    <link:label id="lab_onit_ContractuallySpecifiedServicingAndSubservicingFeesAmountTotal_label_en-US" xlink:label="lab_onit_ContractuallySpecifiedServicingAndSubservicingFeesAmountTotal" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contractually Specified Servicing And Subservicing Fees Amount Total</link:label>
    <link:label id="lab_onit_ContractuallySpecifiedServicingAndSubservicingFeesAmountTotal_documentation_en-US" xlink:label="lab_onit_ContractuallySpecifiedServicingAndSubservicingFeesAmountTotal" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">All amounts that, per contract, are due in exchange for servicing or subservicing the financial asset.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ContractuallySpecifiedServicingAndSubservicingFeesAmountTotal" xlink:href="onit-20260331.xsd#onit_ContractuallySpecifiedServicingAndSubservicingFeesAmountTotal"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ContractuallySpecifiedServicingAndSubservicingFeesAmountTotal" xlink:to="lab_onit_ContractuallySpecifiedServicingAndSubservicingFeesAmountTotal" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019cc591-a808-7417-a0d6-14deaa00e7ed_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]</link:label>
    <link:label id="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_label_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:to="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeLossAttributableToParent_019cc591-a891-7dc3-8b3c-60f99152a0b9_totalLabel_en-US" xlink:label="lab_us-gaap_IncomeLossAttributableToParent" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Income before income taxes</link:label>
    <link:label id="lab_us-gaap_IncomeLossAttributableToParent_019cc591-a891-7bad-8470-face0cf75df2_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossAttributableToParent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income (Loss) Attributable to Parent, before Tax</link:label>
    <link:label id="lab_us-gaap_IncomeLossAttributableToParent_label_en-US" xlink:label="lab_us-gaap_IncomeLossAttributableToParent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income (Loss) Attributable to Parent, before Tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossAttributableToParent" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossAttributableToParent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossAttributableToParent" xlink:to="lab_us-gaap_IncomeLossAttributableToParent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherCommitmentsTable_019cc591-a891-78d0-9e25-42cf66142427_terseLabel_en-US" xlink:label="lab_us-gaap_OtherCommitmentsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Commitments [Table]</link:label>
    <link:label id="lab_us-gaap_OtherCommitmentsTable_label_en-US" xlink:label="lab_us-gaap_OtherCommitmentsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Commitments [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitmentsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherCommitmentsTable" xlink:to="lab_us-gaap_OtherCommitmentsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_IncrementalCommonSharesAttributableToCommonStockAwards_019cc591-a808-7d7b-a54e-c822dedd5e94_terseLabel_en-US" xlink:label="lab_onit_IncrementalCommonSharesAttributableToCommonStockAwards" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock awards (in shares)</link:label>
    <link:label id="lab_onit_IncrementalCommonSharesAttributableToCommonStockAwards_label_en-US" xlink:label="lab_onit_IncrementalCommonSharesAttributableToCommonStockAwards" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Incremental Common Shares Attributable To Common Stock Awards</link:label>
    <link:label id="lab_onit_IncrementalCommonSharesAttributableToCommonStockAwards_documentation_en-US" xlink:label="lab_onit_IncrementalCommonSharesAttributableToCommonStockAwards" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of common stock awards.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_IncrementalCommonSharesAttributableToCommonStockAwards" xlink:href="onit-20260331.xsd#onit_IncrementalCommonSharesAttributableToCommonStockAwards"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_IncrementalCommonSharesAttributableToCommonStockAwards" xlink:to="lab_onit_IncrementalCommonSharesAttributableToCommonStockAwards" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_019cc591-a891-7296-bc3d-22f1d4eed95a_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by (used in) financing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_MeasureAxis_terseLabel_en-US" xlink:label="lab_ecd_MeasureAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Measure:</link:label>
    <link:label id="lab_ecd_MeasureAxis_label_en-US" xlink:label="lab_ecd_MeasureAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measure [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_MeasureAxis" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_MeasureAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_MeasureAxis" xlink:to="lab_ecd_MeasureAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProvisionForLoanLossesExpensed_019cc591-a808-79e2-8c4d-9536fbe3eefc_verboseLabel_en-US" xlink:label="lab_us-gaap_ProvisionForLoanLossesExpensed" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Provision</link:label>
    <link:label id="lab_us-gaap_ProvisionForLoanLossesExpensed_label_en-US" xlink:label="lab_us-gaap_ProvisionForLoanLossesExpensed" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Credit Loss, Expense (Reversal)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForLoanLossesExpensed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForLoanLossesExpensed"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProvisionForLoanLossesExpensed" xlink:to="lab_us-gaap_ProvisionForLoanLossesExpensed" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations_019cc591-a808-77ad-8aa3-1ab464fc5b64_terseLabel_en-US" xlink:label="lab_us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative related receivable</link:label>
    <link:label id="lab_us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations_label_en-US" xlink:label="lab_us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Receivable from Broker-Dealer and Clearing Organization</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations" xlink:to="lab_us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeNet_019cc591-a891-7520-9898-6590ae40d4ff_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivatives, at fair value - See Note 15</link:label>
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeNet_label_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Fair Value, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeNet" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeFairValueOfDerivativeNet" xlink:to="lab_us-gaap_DerivativeFairValueOfDerivativeNet" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ServicingLiabilitiesAtFairValueTable_019cc591-a808-7fe7-90c6-6f8205ce00a7_terseLabel_en-US" xlink:label="lab_us-gaap_ServicingLiabilitiesAtFairValueTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing Liability at Fair Value, Activity [Table]</link:label>
    <link:label id="lab_us-gaap_ServicingLiabilitiesAtFairValueTable_label_en-US" xlink:label="lab_us-gaap_ServicingLiabilitiesAtFairValueTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Liability at Fair Value, Activity [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingLiabilitiesAtFairValueTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingLiabilitiesAtFairValueTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingLiabilitiesAtFairValueTable" xlink:to="lab_us-gaap_ServicingLiabilitiesAtFairValueTable" xlink:type="arc" order="1"/>
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    <link:label id="lab_onit_MSRMember_label_en-US" xlink:label="lab_onit_MSRMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">MSR [Member]</link:label>
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    <link:label id="lab_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_019cc591-a808-750b-ac57-0eff80048c87_terseLabel_en-US" xlink:label="lab_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Public Utilities, General Disclosures [Line Items]</link:label>
    <link:label id="lab_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_label_en-US" xlink:label="lab_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Public Utilities, General Disclosures [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PublicUtilitiesGeneralDisclosuresLineItems"/>
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    <link:label id="lab_us-gaap_SecuritizedAssetsAndAnyOtherFinancialAssetsManagedTogetherLineItems_label_en-US" xlink:label="lab_us-gaap_SecuritizedAssetsAndAnyOtherFinancialAssetsManagedTogetherLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets that Continue to be Recognized, Securitized or Asset-Backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuritizedAssetsAndAnyOtherFinancialAssetsManagedTogetherLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuritizedAssetsAndAnyOtherFinancialAssetsManagedTogetherLineItems"/>
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    <link:label id="lab_dei_EntityTaxIdentificationNumber_019cc591-a808-72d8-be19-ab8798080c6d_terseLabel_en-US" xlink:label="lab_dei_EntityTaxIdentificationNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Tax Identification Number</link:label>
    <link:label id="lab_dei_EntityTaxIdentificationNumber_label_en-US" xlink:label="lab_dei_EntityTaxIdentificationNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Tax Identification Number</link:label>
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    <link:label id="lab_us-gaap_DerivativeMember_019cc591-a891-797b-baed-de33ce4589e9_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
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    <link:label id="lab_us-gaap_DilutiveSecuritiesAbstract_019cc591-a891-7771-a935-926e99f0d048_terseLabel_en-US" xlink:label="lab_us-gaap_DilutiveSecuritiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock options and common stock awards excluded from the computation of diluted earnings per share</link:label>
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    <link:label id="lab_us-gaap_AssetPledgedAsCollateralWithRightMember_019cc591-a891-772e-8265-13532213d6f3_terseLabel_en-US" xlink:label="lab_us-gaap_AssetPledgedAsCollateralWithRightMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Asset Pledged as Collateral with Right</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetPledgedAsCollateralWithRightMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetPledgedAsCollateralWithRightMember"/>
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    <link:label id="lab_us-gaap_TransferOfPortfolioLoansAndLeasesToHeldForSale1_019cc591-a892-7a3f-8a76-fcf8bed19487_terseLabel_en-US" xlink:label="lab_us-gaap_TransferOfPortfolioLoansAndLeasesToHeldForSale1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reverse mortgage loans, at fair value (1)</link:label>
    <link:label id="lab_us-gaap_TransferOfPortfolioLoansAndLeasesToHeldForSale1_label_en-US" xlink:label="lab_us-gaap_TransferOfPortfolioLoansAndLeasesToHeldForSale1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loan and Lease, Transfer from Held-in-Portfolio to Held-for-Sale</link:label>
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    <link:label id="lab_us-gaap_InterestExpenseNonoperating_019cc591-a808-739f-ae97-639dc70f8433_terseLabel_en-US" xlink:label="lab_us-gaap_InterestExpenseNonoperating" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest expense</link:label>
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    <link:label id="lab_dei_SecurityExchangeName_label_en-US" xlink:label="lab_dei_SecurityExchangeName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Security Exchange Name</link:label>
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    <link:label id="lab_us-gaap_StatementLineItems_019cc591-a808-7cb0-a441-114593f51a6a_terseLabel_en-US" xlink:label="lab_us-gaap_StatementLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement [Line Items]</link:label>
    <link:label id="lab_us-gaap_StatementLineItems_label_en-US" xlink:label="lab_us-gaap_StatementLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementLineItems" xlink:to="lab_us-gaap_StatementLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_Rule10b51ArrAdoptedFlag_terseLabel_en-US" xlink:label="lab_ecd_Rule10b51ArrAdoptedFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rule 10b5-1 Arrangement Adopted</link:label>
    <link:label id="lab_ecd_Rule10b51ArrAdoptedFlag_label_en-US" xlink:label="lab_ecd_Rule10b51ArrAdoptedFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Rule 10b5-1 Arrangement Adopted [Flag]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_Rule10b51ArrAdoptedFlag" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_Rule10b51ArrAdoptedFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_Rule10b51ArrAdoptedFlag" xlink:to="lab_ecd_Rule10b51ArrAdoptedFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_019cc591-a891-7e1c-b58d-77629a672cbf_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:to="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cc591-a808-7b09-a840-56d86a69e122_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Measurement Inputs and Valuation Techniques [Table]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Measurement Inputs and Valuation Techniques [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
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    <link:label id="lab_us-gaap_SubsequentEventLineItems_019cc591-a808-757f-8f08-9af3d1b8101d_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event [Line Items]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventLineItems_label_en-US" xlink:label="lab_us-gaap_SubsequentEventLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventLineItems" xlink:to="lab_us-gaap_SubsequentEventLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtSecuritiesAbstract_019cc591-a891-7c1c-b4ca-d4d9bcb4402b_terseLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt securities:</link:label>
    <link:label id="lab_us-gaap_DebtSecuritiesAbstract_label_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtSecuritiesAbstract" xlink:to="lab_us-gaap_DebtSecuritiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockMember_019cc591-a891-7fc7-aa5f-07edcd709ba6_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Stock</link:label>
    <link:label id="lab_us-gaap_CommonStockMember_label_en-US" xlink:label="lab_us-gaap_CommonStockMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockMember" xlink:to="lab_us-gaap_CommonStockMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ProvisionForReversalOfRepresentationAndWarrantyObligations_019cc591-a75e-7344-bd56-1cac19ae0bba_terseLabel_en-US" xlink:label="lab_onit_ProvisionForReversalOfRepresentationAndWarrantyObligations" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Provision for indemnification obligations</link:label>
    <link:label id="lab_onit_ProvisionForReversalOfRepresentationAndWarrantyObligations_label_en-US" xlink:label="lab_onit_ProvisionForReversalOfRepresentationAndWarrantyObligations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Provision for (reversal of) representation and warranty obligations</link:label>
    <link:label id="lab_onit_ProvisionForReversalOfRepresentationAndWarrantyObligations_documentation_en-US" xlink:label="lab_onit_ProvisionForReversalOfRepresentationAndWarrantyObligations" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Provision for (reversal of) representation and warranty obligations</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ProvisionForReversalOfRepresentationAndWarrantyObligations" xlink:href="onit-20260331.xsd#onit_ProvisionForReversalOfRepresentationAndWarrantyObligations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ProvisionForReversalOfRepresentationAndWarrantyObligations" xlink:to="lab_onit_ProvisionForReversalOfRepresentationAndWarrantyObligations" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherShortTermBorrowings_019cc591-a892-7c63-a46e-58a2e8e0538a_terseLabel_en-US" xlink:label="lab_us-gaap_OtherShortTermBorrowings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mortgage warehouse facilities</link:label>
    <link:label id="lab_us-gaap_OtherShortTermBorrowings_019cc591-a892-7c19-9d8b-3ab2995100c9_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherShortTermBorrowings" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Mortgage loan financing facilities, net</link:label>
    <link:label id="lab_us-gaap_OtherShortTermBorrowings_label_en-US" xlink:label="lab_us-gaap_OtherShortTermBorrowings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Short-Term Borrowings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherShortTermBorrowings" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherShortTermBorrowings"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherShortTermBorrowings" xlink:to="lab_us-gaap_OtherShortTermBorrowings" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_OtherReceivablesNet_019cc591-a892-7e85-a18b-fdab4df111ea_terseLabel_en-US" xlink:label="lab_onit_OtherReceivablesNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other receivables</link:label>
    <link:label id="lab_onit_OtherReceivablesNet_label_en-US" xlink:label="lab_onit_OtherReceivablesNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Receivables Net</link:label>
    <link:label id="lab_onit_OtherReceivablesNet_documentation_en-US" xlink:label="lab_onit_OtherReceivablesNet" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The carrying amount of other receivables, net, due from third parties or arising from transactions not separately disclosed.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OtherReceivablesNet" xlink:href="onit-20260331.xsd#onit_OtherReceivablesNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_OtherReceivablesNet" xlink:to="lab_onit_OtherReceivablesNet" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019cc591-a75e-7857-bff4-1aa6779b83b4_totalLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net increase (decrease) in cash, cash equivalents and restricted cash</link:label>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_label_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
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    <link:label id="lab_us-gaap_ServicingAssetAtFairValueAmountRollForward_label_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueAmountRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset at Fair Value, Amount [Roll Forward]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueAmountRollForward" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueAmountRollForward"/>
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    <link:label id="lab_onit_MSRFinancingFacilitiesMember_019cc591-a891-7f2b-8a70-6a18adc0ffa4_terseLabel_en-US" xlink:label="lab_onit_MSRFinancingFacilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MSR financing facilities</link:label>
    <link:label id="lab_onit_MSRFinancingFacilitiesMember_label_en-US" xlink:label="lab_onit_MSRFinancingFacilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">MSR Financing Facilities [Member]</link:label>
    <link:label id="lab_onit_MSRFinancingFacilitiesMember_documentation_en-US" xlink:label="lab_onit_MSRFinancingFacilitiesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">MSR Financing Facilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_MSRFinancingFacilitiesMember" xlink:href="onit-20260331.xsd#onit_MSRFinancingFacilitiesMember"/>
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    <link:label id="lab_us-gaap_MeasurementInputPrepaymentRateMember_label_en-US" xlink:label="lab_us-gaap_MeasurementInputPrepaymentRateMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Input, Prepayment Rate [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputPrepaymentRateMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputPrepaymentRateMember"/>
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    <link:label id="lab_onit_ProceedsFromSaleOfAdvances_label_en-US" xlink:label="lab_onit_ProceedsFromSaleOfAdvances" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds From Sale of Advances</link:label>
    <link:label id="lab_onit_ProceedsFromSaleOfAdvances_documentation_en-US" xlink:label="lab_onit_ProceedsFromSaleOfAdvances" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Proceeds From Sale of Advances</link:label>
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    <link:label id="lab_srt_RangeMember_label_en-US" xlink:label="lab_srt_RangeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statistical Measurement [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
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    <link:loc xlink:type="locator" xlink:label="loc_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf10PercentAdverseChangeInCostToService" xlink:href="onit-20260331.xsd#onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf10PercentAdverseChangeInCostToService"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf10PercentAdverseChangeInCostToService" xlink:to="lab_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf10PercentAdverseChangeInCostToService" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ProceedsFromPrincipalRepaymentReceivedOnReverseMortgageLoansHeldForSalePreviouslyClassifiedAsHeldForInvestment_019dd977-3d0a-7f3e-b19e-3b80c8028fc4_terseLabel_en-US" xlink:label="lab_onit_ProceedsFromPrincipalRepaymentReceivedOnReverseMortgageLoansHeldForSalePreviouslyClassifiedAsHeldForInvestment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Principal payments received on loans previously held for investment</link:label>
    <link:label id="lab_onit_ProceedsFromPrincipalRepaymentReceivedOnReverseMortgageLoansHeldForSalePreviouslyClassifiedAsHeldForInvestment_label_en-US" xlink:label="lab_onit_ProceedsFromPrincipalRepaymentReceivedOnReverseMortgageLoansHeldForSalePreviouslyClassifiedAsHeldForInvestment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds From Principal Repayment Received On Reverse Mortgage Loans Held For Sale, Previously Classified As Held For Investment</link:label>
    <link:label id="lab_onit_ProceedsFromPrincipalRepaymentReceivedOnReverseMortgageLoansHeldForSalePreviouslyClassifiedAsHeldForInvestment_documentation_en-US" xlink:label="lab_onit_ProceedsFromPrincipalRepaymentReceivedOnReverseMortgageLoansHeldForSalePreviouslyClassifiedAsHeldForInvestment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Proceeds From Principal Repayment Received On Reverse Mortgage Loans Held For Sale, Previously Classified As Held For Investment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ProceedsFromPrincipalRepaymentReceivedOnReverseMortgageLoansHeldForSalePreviouslyClassifiedAsHeldForInvestment" xlink:href="onit-20260331.xsd#onit_ProceedsFromPrincipalRepaymentReceivedOnReverseMortgageLoansHeldForSalePreviouslyClassifiedAsHeldForInvestment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ProceedsFromPrincipalRepaymentReceivedOnReverseMortgageLoansHeldForSalePreviouslyClassifiedAsHeldForInvestment" xlink:to="lab_onit_ProceedsFromPrincipalRepaymentReceivedOnReverseMortgageLoansHeldForSalePreviouslyClassifiedAsHeldForInvestment" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestRateSwapMember_019cc591-a75f-7986-b8ff-411c91882aa0_terseLabel_en-US" xlink:label="lab_us-gaap_InterestRateSwapMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest Rate Swap</link:label>
    <link:label id="lab_us-gaap_InterestRateSwapMember_label_en-US" xlink:label="lab_us-gaap_InterestRateSwapMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Swap [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestRateSwapMember" xlink:to="lab_us-gaap_InterestRateSwapMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_MaximumExposureToLoss_019cc591-a891-7e64-b065-7ca7e67ead14_totalLabel_en-US" xlink:label="lab_onit_MaximumExposureToLoss" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Maximum exposure to loss</link:label>
    <link:label id="lab_onit_MaximumExposureToLoss_label_en-US" xlink:label="lab_onit_MaximumExposureToLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum Exposure To Loss</link:label>
    <link:label id="lab_onit_MaximumExposureToLoss_documentation_en-US" xlink:label="lab_onit_MaximumExposureToLoss" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Maximum exposure to loss related to continuing involvement with forward loans that have been transferred with servicing rights retained as well as standard representations and warranties obligations.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_MaximumExposureToLoss" xlink:href="onit-20260331.xsd#onit_MaximumExposureToLoss"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_MaximumExposureToLoss" xlink:to="lab_onit_MaximumExposureToLoss" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EarningsPerShareBasicAbstract_019cc591-a891-7257-a3f9-e7af00666fca_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasicAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted average common shares outstanding</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareBasicAbstract_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasicAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share, Basic [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasicAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareBasicAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareBasicAbstract" xlink:to="lab_us-gaap_EarningsPerShareBasicAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgageOtherChangeInFairValue_019dd98c-f1a5-7fd1-8cbc-57bb9c810f8c_terseLabel_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgageOtherChangeInFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgage, Other Change In Fair Value</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgageOtherChangeInFairValue_label_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgageOtherChangeInFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgage, Other Change In Fair Value</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgageOtherChangeInFairValue_documentation_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgageOtherChangeInFairValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgage, Other Change In Fair Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForSaleReverseMortgageOtherChangeInFairValue" xlink:href="onit-20260331.xsd#onit_LoansHeldForSaleReverseMortgageOtherChangeInFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForSaleReverseMortgageOtherChangeInFairValue" xlink:to="lab_onit_LoansHeldForSaleReverseMortgageOtherChangeInFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PledgedStatusAxis_019cc591-a808-7838-ad6a-2bb7cf9b154a_terseLabel_en-US" xlink:label="lab_us-gaap_PledgedStatusAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pledged Status [Axis]</link:label>
    <link:label id="lab_us-gaap_PledgedStatusAxis_label_en-US" xlink:label="lab_us-gaap_PledgedStatusAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pledged Status [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PledgedStatusAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PledgedStatusAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PledgedStatusAxis" xlink:to="lab_us-gaap_PledgedStatusAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromOtherDebt_019cc591-a75e-77cd-b9aa-7493d19c2f44_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromOtherDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from MSR financing facilities, net</link:label>
    <link:label id="lab_us-gaap_ProceedsFromOtherDebt_label_en-US" xlink:label="lab_us-gaap_ProceedsFromOtherDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Other Debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromOtherDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromOtherDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromOtherDebt" xlink:to="lab_us-gaap_ProceedsFromOtherDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TradingArrByIndTable_terseLabel_en-US" xlink:label="lab_ecd_TradingArrByIndTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trading Arrangements, by Individual</link:label>
    <link:label id="lab_ecd_TradingArrByIndTable_label_en-US" xlink:label="lab_ecd_TradingArrByIndTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Arrangements, by Individual [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TradingArrByIndTable" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_TradingArrByIndTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TradingArrByIndTable" xlink:to="lab_ecd_TradingArrByIndTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EarningsPerShareBasic_019cc591-a891-7b08-9068-394a8383b45e_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Basic (in USD per share)</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareBasic_019cc591-a891-7737-aa6c-3dcc82685c5d_verboseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Basic earnings per share (in USD per share)</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareBasic_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share, Basic</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareBasic" xlink:to="lab_us-gaap_EarningsPerShareBasic" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingAssetsPurchasePriceHoldback_019cc591-a75f-7872-bb14-f987f10ce19e_terseLabel_en-US" xlink:label="lab_onit_ServicingAssetsPurchasePriceHoldback" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MSR purchase price holdback</link:label>
    <link:label id="lab_onit_ServicingAssetsPurchasePriceHoldback_label_en-US" xlink:label="lab_onit_ServicingAssetsPurchasePriceHoldback" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Assets Purchase Price Holdback</link:label>
    <link:label id="lab_onit_ServicingAssetsPurchasePriceHoldback_documentation_en-US" xlink:label="lab_onit_ServicingAssetsPurchasePriceHoldback" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This represents the amount of holdbacks on the purchase of mortgage servicing rights.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingAssetsPurchasePriceHoldback" xlink:href="onit-20260331.xsd#onit_ServicingAssetsPurchasePriceHoldback"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingAssetsPurchasePriceHoldback" xlink:to="lab_onit_ServicingAssetsPurchasePriceHoldback" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ReceivablesFairValueDisclosure_019cc591-a808-77ae-9311-862e3e5725e8_terseLabel_en-US" xlink:label="lab_us-gaap_ReceivablesFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Receivables, net</link:label>
    <link:label id="lab_us-gaap_ReceivablesFairValueDisclosure_label_en-US" xlink:label="lab_us-gaap_ReceivablesFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Receivables, Fair Value Disclosure</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesFairValueDisclosure" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivablesFairValueDisclosure"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReceivablesFairValueDisclosure" xlink:to="lab_us-gaap_ReceivablesFairValueDisclosure" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_019cc591-a891-7c20-9ffd-88100be66164_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table]</link:label>
    <link:label id="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_label_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:to="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PreferredStockDividendsPerShareDeclared_019cc591-a891-7f27-9608-7093a481b7fb_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockDividendsPerShareDeclared" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred Stock, Dividends Per Share, Declared</link:label>
    <link:label id="lab_us-gaap_PreferredStockDividendsPerShareDeclared_label_en-US" xlink:label="lab_us-gaap_PreferredStockDividendsPerShareDeclared" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Dividends Per Share, Declared</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockDividendsPerShareDeclared" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockDividendsPerShareDeclared"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockDividendsPerShareDeclared" xlink:to="lab_us-gaap_PreferredStockDividendsPerShareDeclared" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ScheduleOfMSRValuationAllowanceNetTableTextBlock_019cc591-a75e-7455-8ffe-b268ceb21063_terseLabel_en-US" xlink:label="lab_onit_ScheduleOfMSRValuationAllowanceNetTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule Of MSR Valuation Allowance, Net</link:label>
    <link:label id="lab_onit_ScheduleOfMSRValuationAllowanceNetTableTextBlock_label_en-US" xlink:label="lab_onit_ScheduleOfMSRValuationAllowanceNetTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of MSR Valuation Allowance, Net [Table Text Block]</link:label>
    <link:label id="lab_onit_ScheduleOfMSRValuationAllowanceNetTableTextBlock_documentation_en-US" xlink:label="lab_onit_ScheduleOfMSRValuationAllowanceNetTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule Of MSR Valuation Allowance, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ScheduleOfMSRValuationAllowanceNetTableTextBlock" xlink:href="onit-20260331.xsd#onit_ScheduleOfMSRValuationAllowanceNetTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ScheduleOfMSRValuationAllowanceNetTableTextBlock" xlink:to="lab_onit_ScheduleOfMSRValuationAllowanceNetTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MeasurementInputDiscountRateMember_019cc591-a808-74a5-bb35-2fd7ba5d63b2_terseLabel_en-US" xlink:label="lab_us-gaap_MeasurementInputDiscountRateMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Discount rate</link:label>
    <link:label id="lab_us-gaap_MeasurementInputDiscountRateMember_label_en-US" xlink:label="lab_us-gaap_MeasurementInputDiscountRateMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Input, Discount Rate [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDiscountRateMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputDiscountRateMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MeasurementInputDiscountRateMember" xlink:to="lab_us-gaap_MeasurementInputDiscountRateMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements_019cc591-a75f-7405-bf19-ffc331c39c2f_totalLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Purchases, issuances, sales and settlements, total</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_019cc591-a808-7c1e-b3d1-8ff9898712e4_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Segment Reporting Information</link:label>
    <link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Segment Reporting Information, by Segment [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:to="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ShortTermBorrowings_019cc591-a891-7151-ac90-e2ae0149e3e3_terseLabel_en-US" xlink:label="lab_us-gaap_ShortTermBorrowings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-Term Debt</link:label>
    <link:label id="lab_us-gaap_ShortTermBorrowings_label_en-US" xlink:label="lab_us-gaap_ShortTermBorrowings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-Term Debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermBorrowings"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortTermBorrowings" xlink:to="lab_us-gaap_ShortTermBorrowings" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis_019cc591-a75f-7db3-8d19-e848d0afc7dd_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Axis]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_DueToServicingAndSubservicingInvestors_019cc591-a75e-7b45-870c-6a91261b33c6_terseLabel_en-US" xlink:label="lab_onit_DueToServicingAndSubservicingInvestors" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing-related obligations</link:label>
    <link:label id="lab_onit_DueToServicingAndSubservicingInvestors_label_en-US" xlink:label="lab_onit_DueToServicingAndSubservicingInvestors" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Due To Servicing and Subservicing Investors</link:label>
    <link:label id="lab_onit_DueToServicingAndSubservicingInvestors_documentation_en-US" xlink:label="lab_onit_DueToServicingAndSubservicingInvestors" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amounts due to investors in loans that we service under servicing and subservicing agreements.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_DueToServicingAndSubservicingInvestors" xlink:href="onit-20260331.xsd#onit_DueToServicingAndSubservicingInvestors"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_DueToServicingAndSubservicingInvestors" xlink:to="lab_onit_DueToServicingAndSubservicingInvestors" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountAsset_019cc591-a891-78c2-9334-bd712a963035_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountAsset" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Float balances</link:label>
    <link:label id="lab_us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountAsset_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountAsset" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Disclosure, off-Balance-Sheet Risks, Amount, Asset</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountAsset" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountAsset"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountAsset" xlink:to="lab_us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountAsset" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MeasurementInputTypeDomain_019cc591-a891-728e-9765-dfe8a3efb3fc_terseLabel_en-US" xlink:label="lab_us-gaap_MeasurementInputTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Measurement Input Type [Domain]</link:label>
    <link:label id="lab_us-gaap_MeasurementInputTypeDomain_label_en-US" xlink:label="lab_us-gaap_MeasurementInputTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Input Type [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MeasurementInputTypeDomain" xlink:to="lab_us-gaap_MeasurementInputTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs_019cc591-a892-7049-88e0-34b6a0bdc43f_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">MSR valuation adjustments, net</link:label>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs_019cc591-a892-7be7-9b1b-c1940bafa223_terseLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MSR valuation adjustments, net</link:label>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs_label_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset at Fair Value, Changes in Fair Value Resulting from Changes in Valuation Inputs</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs" xlink:to="lab_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputs" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AgencyMortgageServicingRightsFinancingFacilityMember_019cc591-a75f-70fc-a7f1-187566cfea11_terseLabel_en-US" xlink:label="lab_onit_AgencyMortgageServicingRightsFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Agency Mortgage Servicing Rights Financing Facility</link:label>
    <link:label id="lab_onit_AgencyMortgageServicingRightsFinancingFacilityMember_label_en-US" xlink:label="lab_onit_AgencyMortgageServicingRightsFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Agency Mortgage Servicing Rights Financing Facility [Member]</link:label>
    <link:label id="lab_onit_AgencyMortgageServicingRightsFinancingFacilityMember_documentation_en-US" xlink:label="lab_onit_AgencyMortgageServicingRightsFinancingFacilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Agency Mortgage Servicing Rights Financing Facility [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AgencyMortgageServicingRightsFinancingFacilityMember" xlink:href="onit-20260331.xsd#onit_AgencyMortgageServicingRightsFinancingFacilityMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AgencyMortgageServicingRightsFinancingFacilityMember" xlink:to="lab_onit_AgencyMortgageServicingRightsFinancingFacilityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_RegulatoryRequirementEligibleLiquidityForLicensingAndSellerOrServicerObligations_019cc591-a891-7884-aa7a-bdbf8b12a8d2_terseLabel_en-US" xlink:label="lab_onit_RegulatoryRequirementEligibleLiquidityForLicensingAndSellerOrServicerObligations" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liquidity, reported</link:label>
    <link:label id="lab_onit_RegulatoryRequirementEligibleLiquidityForLicensingAndSellerOrServicerObligations_label_en-US" xlink:label="lab_onit_RegulatoryRequirementEligibleLiquidityForLicensingAndSellerOrServicerObligations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Regulatory Requirement, Eligible Liquidity For Licensing and Seller or Servicer Obligations</link:label>
    <link:label id="lab_onit_RegulatoryRequirementEligibleLiquidityForLicensingAndSellerOrServicerObligations_documentation_en-US" xlink:label="lab_onit_RegulatoryRequirementEligibleLiquidityForLicensingAndSellerOrServicerObligations" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Regulatory Requirement, Eligible Liquidity For Licensing and Seller or Servicer Obligations</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_RegulatoryRequirementEligibleLiquidityForLicensingAndSellerOrServicerObligations" xlink:href="onit-20260331.xsd#onit_RegulatoryRequirementEligibleLiquidityForLicensingAndSellerOrServicerObligations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_RegulatoryRequirementEligibleLiquidityForLicensingAndSellerOrServicerObligations" xlink:to="lab_onit_RegulatoryRequirementEligibleLiquidityForLicensingAndSellerOrServicerObligations" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_IndemnificationObligationsLiability_019cc591-a808-78a8-bb3a-06d2f2dae356_terseLabel_en-US" xlink:label="lab_onit_IndemnificationObligationsLiability" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liability for indemnification obligations</link:label>
    <link:label id="lab_onit_IndemnificationObligationsLiability_label_en-US" xlink:label="lab_onit_IndemnificationObligationsLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Indemnification Obligations Liability</link:label>
    <link:label id="lab_onit_IndemnificationObligationsLiability_documentation_en-US" xlink:label="lab_onit_IndemnificationObligationsLiability" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the liability for indemnification obligations.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_IndemnificationObligationsLiability" xlink:href="onit-20260331.xsd#onit_IndemnificationObligationsLiability"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_IndemnificationObligationsLiability" xlink:to="lab_onit_IndemnificationObligationsLiability" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_GovernmentInsuredLoansClaimsMember_019cc591-a891-72e2-ac54-ac75b81cbc87_terseLabel_en-US" xlink:label="lab_onit_GovernmentInsuredLoansClaimsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Government Insured Loans Claims</link:label>
    <link:label id="lab_onit_GovernmentInsuredLoansClaimsMember_label_en-US" xlink:label="lab_onit_GovernmentInsuredLoansClaimsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Government Insured Loans Claims [Member]</link:label>
    <link:label id="lab_onit_GovernmentInsuredLoansClaimsMember_documentation_en-US" xlink:label="lab_onit_GovernmentInsuredLoansClaimsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Government insured loans claims.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_GovernmentInsuredLoansClaimsMember" xlink:href="onit-20260331.xsd#onit_GovernmentInsuredLoansClaimsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_GovernmentInsuredLoansClaimsMember" xlink:to="lab_onit_GovernmentInsuredLoansClaimsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesUnpaidPrincipal_019dd3f4-f8da-7ade-a812-15cf8da86b07_terseLabel_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesUnpaidPrincipal" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Unpaid Principal</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesUnpaidPrincipal_label_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesUnpaidPrincipal" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Unpaid Principal</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesUnpaidPrincipal_documentation_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesUnpaidPrincipal" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Unpaid Principal</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForSaleReverseMortgagesUnpaidPrincipal" xlink:href="onit-20260331.xsd#onit_LoansHeldForSaleReverseMortgagesUnpaidPrincipal"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForSaleReverseMortgagesUnpaidPrincipal" xlink:to="lab_onit_LoansHeldForSaleReverseMortgagesUnpaidPrincipal" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommunicationsAndInformationTechnology_019cc591-a808-7291-ac1e-bab78dcf7059_terseLabel_en-US" xlink:label="lab_us-gaap_CommunicationsAndInformationTechnology" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Technology and communications</link:label>
    <link:label id="lab_us-gaap_CommunicationsAndInformationTechnology_label_en-US" xlink:label="lab_us-gaap_CommunicationsAndInformationTechnology" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Communications and Information Technology</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommunicationsAndInformationTechnology" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommunicationsAndInformationTechnology"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommunicationsAndInformationTechnology" xlink:to="lab_us-gaap_CommunicationsAndInformationTechnology" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ContingentLoanRepurchaseLiability_019cc591-a75f-7d45-859b-58d273cbef0f_terseLabel_en-US" xlink:label="lab_onit_ContingentLoanRepurchaseLiability" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contingent loan repurchase liability</link:label>
    <link:label id="lab_onit_ContingentLoanRepurchaseLiability_label_en-US" xlink:label="lab_onit_ContingentLoanRepurchaseLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contingent Loan Repurchase Liability</link:label>
    <link:label id="lab_onit_ContingentLoanRepurchaseLiability_documentation_en-US" xlink:label="lab_onit_ContingentLoanRepurchaseLiability" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Contingent Loan Repurchase Liability</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ContingentLoanRepurchaseLiability" xlink:href="onit-20260331.xsd#onit_ContingentLoanRepurchaseLiability"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ContingentLoanRepurchaseLiability" xlink:to="lab_onit_ContingentLoanRepurchaseLiability" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardTmgMnpiDiscTextBlock_terseLabel_en-US" xlink:label="lab_ecd_AwardTmgMnpiDiscTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Timing MNPI Disclosure</link:label>
    <link:label id="lab_ecd_AwardTmgMnpiDiscTextBlock_label_en-US" xlink:label="lab_ecd_AwardTmgMnpiDiscTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Timing MNPI Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgMnpiDiscTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AwardTmgMnpiDiscTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardTmgMnpiDiscTextBlock" xlink:to="lab_ecd_AwardTmgMnpiDiscTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_019cc591-a75f-7759-82eb-d7c6b033005d_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Category of Item Purchased [Axis]</link:label>
    <link:label id="lab_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_label_en-US" xlink:label="lab_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Category of Item Purchased [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis" xlink:to="lab_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ReverseMSRNet_019dd4f3-32c1-7c93-a806-7ac919a063af_terseLabel_en-US" xlink:label="lab_onit_ReverseMSRNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reverse MSR, Net</link:label>
    <link:label id="lab_onit_ReverseMSRNet_label_en-US" xlink:label="lab_onit_ReverseMSRNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reverse MSR, Net</link:label>
    <link:label id="lab_onit_ReverseMSRNet_documentation_en-US" xlink:label="lab_onit_ReverseMSRNet" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Reverse MSR, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ReverseMSRNet" xlink:href="onit-20260331.xsd#onit_ReverseMSRNet"/>
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    <link:label id="lab_us-gaap_ScheduleOfServicingAssetsAtFairValueTextBlock_019cc591-a891-7da7-95e4-2143b8390213_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfServicingAssetsAtFairValueTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Activity Related to MSRs - Fair Value Measurement Method</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RepaymentsOfSecuredDebt" xlink:to="lab_us-gaap_RepaymentsOfSecuredDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsToAcquireOtherInvestments_019cc591-a808-704a-b747-e59bdcb54362_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireOtherInvestments" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Purchase of real estate</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireOtherInvestments_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireOtherInvestments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Other Investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireOtherInvestments" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireOtherInvestments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireOtherInvestments" xlink:to="lab_us-gaap_PaymentsToAcquireOtherInvestments" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PayVsPerformanceDisclosureLineItems_label_en-US" xlink:label="lab_ecd_PayVsPerformanceDisclosureLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pay vs Performance Disclosure [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_PayVsPerformanceDisclosureLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PayVsPerformanceDisclosureLineItems" xlink:to="lab_ecd_PayVsPerformanceDisclosureLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CollateralizedDebtObligationsMember_019cc591-a75e-7fc1-8809-364864fe6b2d_terseLabel_en-US" xlink:label="lab_us-gaap_CollateralizedDebtObligationsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Collateralized Financings (9)</link:label>
    <link:label id="lab_us-gaap_CollateralizedDebtObligationsMember_019dd502-32c8-7f73-8652-4a132fc72941_verboseLabel_en-US" xlink:label="lab_us-gaap_CollateralizedDebtObligationsMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Collateralized Debt Obligations [Member]</link:label>
    <link:label id="lab_us-gaap_CollateralizedDebtObligationsMember_label_en-US" xlink:label="lab_us-gaap_CollateralizedDebtObligationsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Collateralized Debt Obligations [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralizedDebtObligationsMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CollateralizedDebtObligationsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CollateralizedDebtObligationsMember" xlink:to="lab_us-gaap_CollateralizedDebtObligationsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OperatingLeaseLiability_019cc591-a891-7a4e-9474-edf44f200311_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiability" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Lease liability</link:label>
    <link:label id="lab_us-gaap_OperatingLeaseLiability_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Liability</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeaseLiability" xlink:to="lab_us-gaap_OperatingLeaseLiability" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_HMBSRelatedBorrowingsAdditionalProceedsFromSecuritizationOfHECMLoansAndTails_019cc591-a891-7f05-ad36-9de20ed8ab66_negatedTerseLabel_en-US" xlink:label="lab_onit_HMBSRelatedBorrowingsAdditionalProceedsFromSecuritizationOfHECMLoansAndTails" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Additional proceeds from securitization of HECM loans and tails</link:label>
    <link:label id="lab_onit_HMBSRelatedBorrowingsAdditionalProceedsFromSecuritizationOfHECMLoansAndTails_label_en-US" xlink:label="lab_onit_HMBSRelatedBorrowingsAdditionalProceedsFromSecuritizationOfHECMLoansAndTails" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">HMBS Related Borrowings, Additional Proceeds from Securitization of HECM Loans and Tails</link:label>
    <link:label id="lab_onit_HMBSRelatedBorrowingsAdditionalProceedsFromSecuritizationOfHECMLoansAndTails_documentation_en-US" xlink:label="lab_onit_HMBSRelatedBorrowingsAdditionalProceedsFromSecuritizationOfHECMLoansAndTails" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amounts related to additional proceeds from securitization of loans and tails of home equity conversion mortgage-backed securities related borrowings accounted for as a financing.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_HMBSRelatedBorrowingsAdditionalProceedsFromSecuritizationOfHECMLoansAndTails" xlink:href="onit-20260331.xsd#onit_HMBSRelatedBorrowingsAdditionalProceedsFromSecuritizationOfHECMLoansAndTails"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_HMBSRelatedBorrowingsAdditionalProceedsFromSecuritizationOfHECMLoansAndTails" xlink:to="lab_onit_HMBSRelatedBorrowingsAdditionalProceedsFromSecuritizationOfHECMLoansAndTails" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_019cc591-a808-7c17-8589-6c2ba624cee0_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Asset, Equal to or Greater than 90 Days Past Due [Member]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_label_en-US" xlink:label="lab_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Asset, Equal to or Greater than 90 Days Past Due [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember" xlink:to="lab_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInDerivativeAssetsAndLiabilities_019cc591-a808-7986-b4db-80984d8c4da5_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInDerivativeAssetsAndLiabilities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Decrease (increase) in derivatives</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInDerivativeAssetsAndLiabilities_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInDerivativeAssetsAndLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Derivative Assets and Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInDerivativeAssetsAndLiabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInDerivativeAssetsAndLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInDerivativeAssetsAndLiabilities" xlink:to="lab_us-gaap_IncreaseDecreaseInDerivativeAssetsAndLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ScheduleofActivityRelatedtoHMBSRepurchasesTableTextBlock_019cc591-a891-7764-b928-c013d26555ce_terseLabel_en-US" xlink:label="lab_onit_ScheduleofActivityRelatedtoHMBSRepurchasesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Activity Related to HMBS Repurchases</link:label>
    <link:label id="lab_onit_ScheduleofActivityRelatedtoHMBSRepurchasesTableTextBlock_label_en-US" xlink:label="lab_onit_ScheduleofActivityRelatedtoHMBSRepurchasesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Activity Related to HMBS Repurchases [Table Text Block]</link:label>
    <link:label id="lab_onit_ScheduleofActivityRelatedtoHMBSRepurchasesTableTextBlock_documentation_en-US" xlink:label="lab_onit_ScheduleofActivityRelatedtoHMBSRepurchasesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of activity related to HMBS repurchases.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ScheduleofActivityRelatedtoHMBSRepurchasesTableTextBlock" xlink:href="onit-20260331.xsd#onit_ScheduleofActivityRelatedtoHMBSRepurchasesTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ScheduleofActivityRelatedtoHMBSRepurchasesTableTextBlock" xlink:to="lab_onit_ScheduleofActivityRelatedtoHMBSRepurchasesTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LiabilitiesAbstract_019cc591-a808-7b63-89cc-c39a8b316678_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liabilities</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAbstract_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAbstract" xlink:to="lab_us-gaap_LiabilitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesLineItems_019cc591-a808-7244-9b13-ab7fe1aede87_terseLabel_en-US" xlink:label="lab_us-gaap_ComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]</link:label>
    <link:label id="lab_us-gaap_ComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesLineItems_label_en-US" xlink:label="lab_us-gaap_ComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesLineItems" xlink:to="lab_us-gaap_ComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ScheduleOfLiabilityForRepresentationAndWarrantyObligationsCompensatoryFeesAndIndemnificationObligationsTableTextBlock_019cc591-a891-73fa-af9c-59240ad6f8ad_terseLabel_en-US" xlink:label="lab_onit_ScheduleOfLiabilityForRepresentationAndWarrantyObligationsCompensatoryFeesAndIndemnificationObligationsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Indemnification Obligations</link:label>
    <link:label id="lab_onit_ScheduleOfLiabilityForRepresentationAndWarrantyObligationsCompensatoryFeesAndIndemnificationObligationsTableTextBlock_label_en-US" xlink:label="lab_onit_ScheduleOfLiabilityForRepresentationAndWarrantyObligationsCompensatoryFeesAndIndemnificationObligationsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Liability For Representation And Warranty Obligations Compensatory Fees And Indemnification Obligations [Table Text Block]</link:label>
    <link:label id="lab_onit_ScheduleOfLiabilityForRepresentationAndWarrantyObligationsCompensatoryFeesAndIndemnificationObligationsTableTextBlock_documentation_en-US" xlink:label="lab_onit_ScheduleOfLiabilityForRepresentationAndWarrantyObligationsCompensatoryFeesAndIndemnificationObligationsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tabular disclosure of changes in liability for representation and warranty obligations, compensatory fees for foreclosures that may ultimately exceed investor timelines and related indemnification obligations.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ScheduleOfLiabilityForRepresentationAndWarrantyObligationsCompensatoryFeesAndIndemnificationObligationsTableTextBlock" xlink:href="onit-20260331.xsd#onit_ScheduleOfLiabilityForRepresentationAndWarrantyObligationsCompensatoryFeesAndIndemnificationObligationsTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ScheduleOfLiabilityForRepresentationAndWarrantyObligationsCompensatoryFeesAndIndemnificationObligationsTableTextBlock" xlink:to="lab_onit_ScheduleOfLiabilityForRepresentationAndWarrantyObligationsCompensatoryFeesAndIndemnificationObligationsTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_019cc591-a808-7979-9727-ece019bc9499_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Redemption price, percentage of principal amount</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_BankingRegulationMortgageBankingNetWorthActual_019cc591-a891-78c9-a610-9ab028852e8d_terseLabel_en-US" xlink:label="lab_us-gaap_BankingRegulationMortgageBankingNetWorthActual" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net worth, reported</link:label>
    <link:label id="lab_us-gaap_BankingRegulationMortgageBankingNetWorthActual_label_en-US" xlink:label="lab_us-gaap_BankingRegulationMortgageBankingNetWorthActual" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Banking Regulation, Mortgage Banking, Net Worth, Actual</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BankingRegulationMortgageBankingNetWorthActual" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BankingRegulationMortgageBankingNetWorthActual"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BankingRegulationMortgageBankingNetWorthActual" xlink:to="lab_us-gaap_BankingRegulationMortgageBankingNetWorthActual" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain_019cc591-a891-7a40-b2ad-25403d245ef3_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Domain]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FinancingReceivableThresholdPeriodPastDue_019cc591-a808-796f-9937-5dda09c69634_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableThresholdPeriodPastDue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Threshold period past due</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableThresholdPeriodPastDue_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableThresholdPeriodPastDue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Threshold Period Past Due</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableThresholdPeriodPastDue" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableThresholdPeriodPastDue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableThresholdPeriodPastDue" xlink:to="lab_us-gaap_FinancingReceivableThresholdPeriodPastDue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfVariableInterestEntitiesTable_019dd527-7cb7-7803-91fc-58031b2ece76_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfVariableInterestEntitiesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Variable Interest Entity [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfVariableInterestEntitiesTable_label_en-US" xlink:label="lab_us-gaap_ScheduleOfVariableInterestEntitiesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Interest Entity [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable" xlink:to="lab_us-gaap_ScheduleOfVariableInterestEntitiesTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StatementOfCashFlowsAbstract_019cc591-a891-7382-98b3-4b16ef1c0929_terseLabel_en-US" xlink:label="lab_us-gaap_StatementOfCashFlowsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement of Cash Flows [Abstract]</link:label>
    <link:label id="lab_us-gaap_StatementOfCashFlowsAbstract_label_en-US" xlink:label="lab_us-gaap_StatementOfCashFlowsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Cash Flows [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfCashFlowsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfCashFlowsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract" xlink:to="lab_us-gaap_StatementOfCashFlowsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_CoSelectedMeasureAmt_terseLabel_en-US" xlink:label="lab_ecd_CoSelectedMeasureAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Company Selected Measure Amount</link:label>
    <link:label id="lab_ecd_CoSelectedMeasureAmt_label_en-US" xlink:label="lab_ecd_CoSelectedMeasureAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Company Selected Measure Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_CoSelectedMeasureAmt" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_CoSelectedMeasureAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_CoSelectedMeasureAmt" xlink:to="lab_ecd_CoSelectedMeasureAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_Cash_019cc591-a808-713c-af22-3bf08fdb1316_terseLabel_en-US" xlink:label="lab_us-gaap_Cash" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents</link:label>
    <link:label id="lab_us-gaap_Cash_label_en-US" xlink:label="lab_us-gaap_Cash" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Cash" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Cash"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Cash" xlink:to="lab_us-gaap_Cash" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldforInvestmentReverseMortgagesMember_019cc591-a891-773a-b27a-e769001d5307_terseLabel_en-US" xlink:label="lab_onit_LoansHeldforInvestmentReverseMortgagesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans Held for Investment Reverse Mortgages</link:label>
    <link:label id="lab_onit_LoansHeldforInvestmentReverseMortgagesMember_label_en-US" xlink:label="lab_onit_LoansHeldforInvestmentReverseMortgagesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held for Investment Reverse Mortgages [Member]</link:label>
    <link:label id="lab_onit_LoansHeldforInvestmentReverseMortgagesMember_documentation_en-US" xlink:label="lab_onit_LoansHeldforInvestmentReverseMortgagesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Held for Investment.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldforInvestmentReverseMortgagesMember" xlink:href="onit-20260331.xsd#onit_LoansHeldforInvestmentReverseMortgagesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldforInvestmentReverseMortgagesMember" xlink:to="lab_onit_LoansHeldforInvestmentReverseMortgagesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTax_019cc591-a891-75d0-9e4c-d2e2f02cd01e_totalLabel_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTax" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Comprehensive income</link:label>
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTax_label_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Comprehensive Income (Loss), Net of Tax, Attributable to Parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax" xlink:to="lab_us-gaap_ComprehensiveIncomeNetOfTax" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MeasurementInputTypeAxis_019cc591-a891-7208-8f45-cce5e97c46f8_terseLabel_en-US" xlink:label="lab_us-gaap_MeasurementInputTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Measurement Input Type [Axis]</link:label>
    <link:label id="lab_us-gaap_MeasurementInputTypeAxis_label_en-US" xlink:label="lab_us-gaap_MeasurementInputTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Input Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MeasurementInputTypeAxis" xlink:to="lab_us-gaap_MeasurementInputTypeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ScheduleOfResultsOfOperationsInConnectionWithMSRTransferAgreementsThatDoNotQualifyForSaleAccountingTableTextBlock_019cc591-a808-706d-9966-104d704e3e2e_terseLabel_en-US" xlink:label="lab_onit_ScheduleOfResultsOfOperationsInConnectionWithMSRTransferAgreementsThatDoNotQualifyForSaleAccountingTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Results of Operations in Connection With MSR Transfer Agreements that Do Not Qualify for Sale Accounting</link:label>
    <link:label id="lab_onit_ScheduleOfResultsOfOperationsInConnectionWithMSRTransferAgreementsThatDoNotQualifyForSaleAccountingTableTextBlock_label_en-US" xlink:label="lab_onit_ScheduleOfResultsOfOperationsInConnectionWithMSRTransferAgreementsThatDoNotQualifyForSaleAccountingTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Results of Operations in Connection With MSR Transfer Agreements that Do Not Qualify for Sale Accounting [Table Text Block]</link:label>
    <link:label id="lab_onit_ScheduleOfResultsOfOperationsInConnectionWithMSRTransferAgreementsThatDoNotQualifyForSaleAccountingTableTextBlock_documentation_en-US" xlink:label="lab_onit_ScheduleOfResultsOfOperationsInConnectionWithMSRTransferAgreementsThatDoNotQualifyForSaleAccountingTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of Results of Operations in Connection With MSR Transfer Agreements that Do Not Qualify for Sale Accounting.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ScheduleOfResultsOfOperationsInConnectionWithMSRTransferAgreementsThatDoNotQualifyForSaleAccountingTableTextBlock" xlink:href="onit-20260331.xsd#onit_ScheduleOfResultsOfOperationsInConnectionWithMSRTransferAgreementsThatDoNotQualifyForSaleAccountingTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ScheduleOfResultsOfOperationsInConnectionWithMSRTransferAgreementsThatDoNotQualifyForSaleAccountingTableTextBlock" xlink:to="lab_onit_ScheduleOfResultsOfOperationsInConnectionWithMSRTransferAgreementsThatDoNotQualifyForSaleAccountingTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_MeasureName_terseLabel_en-US" xlink:label="lab_ecd_MeasureName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Name</link:label>
    <link:label id="lab_ecd_MeasureName_label_en-US" xlink:label="lab_ecd_MeasureName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measure Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_MeasureName" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_MeasureName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_MeasureName" xlink:to="lab_ecd_MeasureName" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues_019cc591-a891-7ae6-8406-1a95076f8a84_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Issuances</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SecuredDebtMember_019cc591-a891-77bd-9809-0af9a85ecb93_terseLabel_en-US" xlink:label="lab_us-gaap_SecuredDebtMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Secured Debt</link:label>
    <link:label id="lab_us-gaap_SecuredDebtMember_label_en-US" xlink:label="lab_us-gaap_SecuredDebtMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Secured Debt [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredDebtMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SecuredDebtMember" xlink:to="lab_us-gaap_SecuredDebtMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FutureMember_019dd4df-32a5-7229-a20e-3d0733ffb7e0_terseLabel_en-US" xlink:label="lab_us-gaap_FutureMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Future</link:label>
    <link:label id="lab_us-gaap_FutureMember_label_en-US" xlink:label="lab_us-gaap_FutureMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Future [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FutureMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FutureMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FutureMember" xlink:to="lab_us-gaap_FutureMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_FinancingLiabilityAtFairValue_019cc591-a808-74c6-92ab-6cccbdad1527_periodStartLabel_en-US" xlink:label="lab_onit_FinancingLiabilityAtFairValue" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance</link:label>
    <link:label id="lab_onit_FinancingLiabilityAtFairValue_019cc591-a808-7be4-a296-257166557dd9_periodEndLabel_en-US" xlink:label="lab_onit_FinancingLiabilityAtFairValue" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance</link:label>
    <link:label id="lab_onit_FinancingLiabilityAtFairValue_label_en-US" xlink:label="lab_onit_FinancingLiabilityAtFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Liability At Fair Value</link:label>
    <link:label id="lab_onit_FinancingLiabilityAtFairValue_documentation_en-US" xlink:label="lab_onit_FinancingLiabilityAtFairValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This represents the amount of liability arose in connection with sales proceeds received in 2012 and 2013 as part of the Rights to MSRs transactions with NRZ/HLSS and has no contractual maturity or repayment schedule. The balance of the liability is adjusted each reporting period to its fair value based on the present value of the estimated future cash flows underlying the related MSRs.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_FinancingLiabilityAtFairValue" xlink:href="onit-20260331.xsd#onit_FinancingLiabilityAtFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_FinancingLiabilityAtFairValue" xlink:to="lab_onit_FinancingLiabilityAtFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongTermDebt_019cc591-a75f-73a1-aac0-49ae643f53a8_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Outstanding borrowings (MSR financing facilities, net)</link:label>
    <link:label id="lab_us-gaap_LongTermDebt_label_en-US" xlink:label="lab_us-gaap_LongTermDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebt" xlink:to="lab_us-gaap_LongTermDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_LegalEntityAxis_019cc591-a891-7f5b-a689-406f87188980_terseLabel_en-US" xlink:label="lab_dei_LegalEntityAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Legal Entity [Axis]</link:label>
    <link:label id="lab_dei_LegalEntityAxis_label_en-US" xlink:label="lab_dei_LegalEntityAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Legal Entity [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LegalEntityAxis" xlink:to="lab_dei_LegalEntityAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_Assets_019cc591-a75f-7b30-8d6a-cc9668bf0dff_totalLabel_en-US" xlink:label="lab_us-gaap_Assets" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total assets</link:label>
    <link:label id="lab_us-gaap_Assets_019cc591-a75f-7620-84c6-3166d64210d2_terseLabel_en-US" xlink:label="lab_us-gaap_Assets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Assets</link:label>
    <link:label id="lab_us-gaap_Assets_label_en-US" xlink:label="lab_us-gaap_Assets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Assets" xlink:to="lab_us-gaap_Assets" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoanCommitmentToCorrespondents_019cc591-a891-7e84-9ccd-c112489fe719_terseLabel_en-US" xlink:label="lab_onit_LoanCommitmentToCorrespondents" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loan Commitment to Correspondents</link:label>
    <link:label id="lab_onit_LoanCommitmentToCorrespondents_label_en-US" xlink:label="lab_onit_LoanCommitmentToCorrespondents" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loan Commitment to Correspondents</link:label>
    <link:label id="lab_onit_LoanCommitmentToCorrespondents_documentation_en-US" xlink:label="lab_onit_LoanCommitmentToCorrespondents" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">General Loan Commitment to Correspondents</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoanCommitmentToCorrespondents" xlink:href="onit-20260331.xsd#onit_LoanCommitmentToCorrespondents"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoanCommitmentToCorrespondents" xlink:to="lab_onit_LoanCommitmentToCorrespondents" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SecuritizedAssetsAndAnyOtherFinancialAssetsManagedTogetherTable_019cc591-a808-7c1e-bfc1-dddca437de28_terseLabel_en-US" xlink:label="lab_us-gaap_SecuritizedAssetsAndAnyOtherFinancialAssetsManagedTogetherTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets that Continue to be Recognized, Transferred Financial Assets and Other Financial Assets Managed Together [Table]</link:label>
    <link:label id="lab_us-gaap_SecuritizedAssetsAndAnyOtherFinancialAssetsManagedTogetherTable_label_en-US" xlink:label="lab_us-gaap_SecuritizedAssetsAndAnyOtherFinancialAssetsManagedTogetherTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets that Continue to be Recognized, Transferred Financial Assets and Other Financial Assets Managed Together [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuritizedAssetsAndAnyOtherFinancialAssetsManagedTogetherTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuritizedAssetsAndAnyOtherFinancialAssetsManagedTogetherTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SecuritizedAssetsAndAnyOtherFinancialAssetsManagedTogetherTable" xlink:to="lab_us-gaap_SecuritizedAssetsAndAnyOtherFinancialAssetsManagedTogetherTable" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_SegmentGeographicalDomain_019cc591-a891-725a-96be-6d2a0f52b0e1_terseLabel_en-US" xlink:label="lab_srt_SegmentGeographicalDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Geographical [Domain]</link:label>
    <link:label id="lab_srt_SegmentGeographicalDomain_label_en-US" xlink:label="lab_srt_SegmentGeographicalDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographical [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_SegmentGeographicalDomain" xlink:to="lab_srt_SegmentGeographicalDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_HomeEquityConversionMortgageBackedSecuritiesRelatedBorrowingsAtFairValue_019cc591-a808-7d2d-ab5d-afc2028dbd78_terseLabel_en-US" xlink:label="lab_onit_HomeEquityConversionMortgageBackedSecuritiesRelatedBorrowingsAtFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HMBS-related borrowings, at fair value</link:label>
    <link:label id="lab_onit_HomeEquityConversionMortgageBackedSecuritiesRelatedBorrowingsAtFairValue_019cc591-a808-74ae-ad3c-74c8756562ed_verboseLabel_en-US" xlink:label="lab_onit_HomeEquityConversionMortgageBackedSecuritiesRelatedBorrowingsAtFairValue" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">HMBS-related borrowings</link:label>
    <link:label id="lab_onit_HomeEquityConversionMortgageBackedSecuritiesRelatedBorrowingsAtFairValue_019cc591-a808-7dfc-9d40-88bdafc5fddd_negatedTerseLabel_en-US" xlink:label="lab_onit_HomeEquityConversionMortgageBackedSecuritiesRelatedBorrowingsAtFairValue" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Home Equity Conversion Mortgage-Backed Securities Related Borrowings At Fair Value</link:label>
    <link:label id="lab_onit_HomeEquityConversionMortgageBackedSecuritiesRelatedBorrowingsAtFairValue_019cc591-a808-761f-90f6-ab9563bee68e_negatedPeriodEndLabel_en-US" xlink:label="lab_onit_HomeEquityConversionMortgageBackedSecuritiesRelatedBorrowingsAtFairValue" xlink:role="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance</link:label>
    <link:label id="lab_onit_HomeEquityConversionMortgageBackedSecuritiesRelatedBorrowingsAtFairValue_label_en-US" xlink:label="lab_onit_HomeEquityConversionMortgageBackedSecuritiesRelatedBorrowingsAtFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Home Equity Conversion Mortgage-Backed Securities Related Borrowings At Fair Value</link:label>
    <link:label id="lab_onit_HomeEquityConversionMortgageBackedSecuritiesRelatedBorrowingsAtFairValue_documentation_en-US" xlink:label="lab_onit_HomeEquityConversionMortgageBackedSecuritiesRelatedBorrowingsAtFairValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This represents the amount of liability which is a resultant of reverse mortgage loans sold into the secondary with servicing rights retained. As the transfer of these loans do not meet the definition of participating interest because of the servicing requirement that requires the issuer to absorb some level of risk, these transfers are accounted for as financing.</link:label>
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    <link:label id="lab_onit_SecuritizedHomeEquityConversionMortgageBackedSecurity_019cc591-a808-7fb0-b727-9bec5b2d82ed_terseLabel_en-US" xlink:label="lab_onit_SecuritizedHomeEquityConversionMortgageBackedSecurity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Securitized Home Equity Conversion Mortgage-Backed Security</link:label>
    <link:label id="lab_onit_SecuritizedHomeEquityConversionMortgageBackedSecurity_label_en-US" xlink:label="lab_onit_SecuritizedHomeEquityConversionMortgageBackedSecurity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Securitized Home Equity Conversion Mortgage-Backed Security</link:label>
    <link:label id="lab_onit_SecuritizedHomeEquityConversionMortgageBackedSecurity_documentation_en-US" xlink:label="lab_onit_SecuritizedHomeEquityConversionMortgageBackedSecurity" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Securitized Home Equity Conversion Mortgage-Backed Security</link:label>
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    <link:label id="lab_us-gaap_OtherTaxExpenseBenefit_019cc591-a891-77c2-b0d8-b66515c5324a_terseLabel_en-US" xlink:label="lab_us-gaap_OtherTaxExpenseBenefit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income tax benefit</link:label>
    <link:label id="lab_us-gaap_OtherTaxExpenseBenefit_label_en-US" xlink:label="lab_us-gaap_OtherTaxExpenseBenefit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Tax Expense (Benefit)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherTaxExpenseBenefit" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherTaxExpenseBenefit"/>
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    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesFairValueAdjustment_label_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesFairValueAdjustment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Fair Value Adjustment</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesFairValueAdjustment_documentation_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesFairValueAdjustment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Fair Value Adjustment</link:label>
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    <link:label id="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Allowance for Credit Loss [Roll Forward]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward"/>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019cc591-a808-7567-b7e8-002eaf362992_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash flows from operating activities</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
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    <link:label id="lab_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019cc591-a891-7e2b-a02a-e7b6186f336c_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Receivable Type [Axis]</link:label>
    <link:label id="lab_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_label_en-US" xlink:label="lab_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Receivable Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis"/>
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    <link:label id="lab_us-gaap_ConcentrationRiskByTypeAxis_019cc591-a891-79e3-b676-de0a10296086_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskByTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Concentration Risk Type [Axis]</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskByTypeAxis_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskByTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis" xlink:to="lab_us-gaap_ConcentrationRiskByTypeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromSaleAndCollectionOfLoansHeldforsale_019cc591-a808-74a0-b7d5-82c8c842210b_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleAndCollectionOfLoansHeldforsale" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sale and collections of loans held for sale</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleAndCollectionOfLoansHeldforsale_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleAndCollectionOfLoansHeldforsale" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale and Collection, Loan, Held-for-Sale</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleAndCollectionOfLoansHeldforsale" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromSaleAndCollectionOfLoansHeldforsale"/>
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    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesOriginations_019dd986-86d0-7dc1-a20d-8bf4fb1b91b1_terseLabel_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesOriginations" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Originations</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesOriginations_label_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesOriginations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Originations</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesOriginations_documentation_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesOriginations" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Originations</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForSaleReverseMortgagesOriginations" xlink:href="onit-20260331.xsd#onit_LoansHeldForSaleReverseMortgagesOriginations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForSaleReverseMortgagesOriginations" xlink:to="lab_onit_LoansHeldForSaleReverseMortgagesOriginations" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_VariableInterestEntityLineItems_019dd527-7cb7-7306-906f-44a0c1b48443_terseLabel_en-US" xlink:label="lab_us-gaap_VariableInterestEntityLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Variable Interest Entity [Line Items]</link:label>
    <link:label id="lab_us-gaap_VariableInterestEntityLineItems_label_en-US" xlink:label="lab_us-gaap_VariableInterestEntityLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Interest Entity [Line Items]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableInterestEntityLineItems" xlink:to="lab_us-gaap_VariableInterestEntityLineItems" xlink:type="arc" order="1"/>
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    <link:label id="lab_dei_EntityCommonStockSharesOutstanding_label_en-US" xlink:label="lab_dei_EntityCommonStockSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Common Stock, Shares Outstanding</link:label>
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    <link:label id="lab_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInCostToService_019dd3f3-8f82-7714-804a-b876634de828_negatedTerseLabel_en-US" xlink:label="lab_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInCostToService" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Cost To Service</link:label>
    <link:label id="lab_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInCostToService_label_en-US" xlink:label="lab_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInCostToService" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Cost To Service</link:label>
    <link:label id="lab_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInCostToService_documentation_en-US" xlink:label="lab_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInCostToService" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Cost To Service</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInCostToService" xlink:href="onit-20260331.xsd#onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInCostToService"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInCostToService" xlink:to="lab_onit_SensitivityAnalysisOfFairValueTransferorsInterestsInTransferredFinancialAssetsImpactOf20PercentAdverseChangeInCostToService" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3Other_019cc591-a808-7b16-acca-69715e0e9863_negatedTerseLabel_en-US" xlink:label="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3Other" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3Other_label_en-US" xlink:label="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3Other" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3, Other</link:label>
    <link:label id="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3Other_documentation_en-US" xlink:label="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3Other" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3, Other</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3Other" xlink:href="onit-20260331.xsd#onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3Other"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3Other" xlink:to="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3Other" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AssetPledgedAsCollateralMember_019cc591-a891-7568-ac1e-748809bef2d6_terseLabel_en-US" xlink:label="lab_us-gaap_AssetPledgedAsCollateralMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pledged Assets</link:label>
    <link:label id="lab_us-gaap_AssetPledgedAsCollateralMember_label_en-US" xlink:label="lab_us-gaap_AssetPledgedAsCollateralMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Asset Pledged as Collateral [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetPledgedAsCollateralMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetPledgedAsCollateralMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetPledgedAsCollateralMember" xlink:to="lab_us-gaap_AssetPledgedAsCollateralMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TemporaryEquityValueExcludingAdditionalPaidInCapital_019cc591-a808-7f5b-95ab-7bd96670426a_terseLabel_en-US" xlink:label="lab_us-gaap_TemporaryEquityValueExcludingAdditionalPaidInCapital" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Series B Preferred stock, $0.01 par value and $25.00 liquidation preference value; 2,400,000 shares authorized; 2,111,786 and 2,111,786 shares issued and outstanding at March&#160;31, 2026 and December&#160;31, 2025, respectively</link:label>
    <link:label id="lab_us-gaap_TemporaryEquityValueExcludingAdditionalPaidInCapital_label_en-US" xlink:label="lab_us-gaap_TemporaryEquityValueExcludingAdditionalPaidInCapital" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Temporary Equity, Par Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityValueExcludingAdditionalPaidInCapital" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityValueExcludingAdditionalPaidInCapital"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TemporaryEquityValueExcludingAdditionalPaidInCapital" xlink:to="lab_us-gaap_TemporaryEquityValueExcludingAdditionalPaidInCapital" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_InactiveMember_019cc591-a892-741b-858f-7628babcd002_terseLabel_en-US" xlink:label="lab_onit_InactiveMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Inactive</link:label>
    <link:label id="lab_onit_InactiveMember_label_en-US" xlink:label="lab_onit_InactiveMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Inactive [Member]</link:label>
    <link:label id="lab_onit_InactiveMember_documentation_en-US" xlink:label="lab_onit_InactiveMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Inactive loans.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_InactiveMember" xlink:href="onit-20260331.xsd#onit_InactiveMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_InactiveMember" xlink:to="lab_onit_InactiveMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_IncreaseDecreaseInAdvancesAndTransfersAccountedForAsSecuredBorrowingsAdvances_019cc591-a75f-7068-bcab-2f4444b36b65_negatedTerseLabel_en-US" xlink:label="lab_onit_IncreaseDecreaseInAdvancesAndTransfersAccountedForAsSecuredBorrowingsAdvances" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Decrease in advances</link:label>
    <link:label id="lab_onit_IncreaseDecreaseInAdvancesAndTransfersAccountedForAsSecuredBorrowingsAdvances_label_en-US" xlink:label="lab_onit_IncreaseDecreaseInAdvancesAndTransfersAccountedForAsSecuredBorrowingsAdvances" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase Decrease In Advances and Transfers Accounted For As Secured Borrowings Advances</link:label>
    <link:label id="lab_onit_IncreaseDecreaseInAdvancesAndTransfersAccountedForAsSecuredBorrowingsAdvances_documentation_en-US" xlink:label="lab_onit_IncreaseDecreaseInAdvancesAndTransfersAccountedForAsSecuredBorrowingsAdvances" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The net change during the reporting period in the carrying amount of non-interest-bearing advances on loans serviced for others and advances transferred to special purpose entities in transactions accounted for as secured borrowings.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_IncreaseDecreaseInAdvancesAndTransfersAccountedForAsSecuredBorrowingsAdvances" xlink:href="onit-20260331.xsd#onit_IncreaseDecreaseInAdvancesAndTransfersAccountedForAsSecuredBorrowingsAdvances"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_IncreaseDecreaseInAdvancesAndTransfersAccountedForAsSecuredBorrowingsAdvances" xlink:to="lab_onit_IncreaseDecreaseInAdvancesAndTransfersAccountedForAsSecuredBorrowingsAdvances" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PeoMember_terseLabel_en-US" xlink:label="lab_ecd_PeoMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PEO</link:label>
    <link:label id="lab_ecd_PeoMember_label_en-US" xlink:label="lab_ecd_PeoMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PEO [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeoMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_PeoMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PeoMember" xlink:to="lab_ecd_PeoMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfSecuredDebt_019cc591-a891-7a35-a16b-328b93e84bf2_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfSecuredDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from reverse mortgage securitization notes</link:label>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfSecuredDebt_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfSecuredDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Issuance of Secured Debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfSecuredDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfSecuredDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromIssuanceOfSecuredDebt" xlink:to="lab_us-gaap_ProceedsFromIssuanceOfSecuredDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AncillaryFeeIncomeGeneratedByServicingFinancialAssetsAmount_019cc591-a891-76cf-bea0-069d9809947d_terseLabel_en-US" xlink:label="lab_us-gaap_AncillaryFeeIncomeGeneratedByServicingFinancialAssetsAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other, net</link:label>
    <link:label id="lab_us-gaap_AncillaryFeeIncomeGeneratedByServicingFinancialAssetsAmount_label_en-US" xlink:label="lab_us-gaap_AncillaryFeeIncomeGeneratedByServicingFinancialAssetsAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ancillary Fee Income Generated by Servicing Financial Assets, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AncillaryFeeIncomeGeneratedByServicingFinancialAssetsAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AncillaryFeeIncomeGeneratedByServicingFinancialAssetsAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AncillaryFeeIncomeGeneratedByServicingFinancialAssetsAmount" xlink:to="lab_us-gaap_AncillaryFeeIncomeGeneratedByServicingFinancialAssetsAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInDiscountRate_019cc591-a808-75cd-b137-38dcfb8334a3_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInDiscountRate" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Weighted average discount rate, 10%</link:label>
    <link:label id="lab_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInDiscountRate_label_en-US" xlink:label="lab_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInDiscountRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Discount Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInDiscountRate" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInDiscountRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInDiscountRate" xlink:to="lab_us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInDiscountRate" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityNumberOfEmployees_019cc591-a808-7501-95bf-21176d3f0663_terseLabel_en-US" xlink:label="lab_dei_EntityNumberOfEmployees" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total number of employees</link:label>
    <link:label id="lab_dei_EntityNumberOfEmployees_label_en-US" xlink:label="lab_dei_EntityNumberOfEmployees" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Number of Employees</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityNumberOfEmployees" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityNumberOfEmployees"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityNumberOfEmployees" xlink:to="lab_dei_EntityNumberOfEmployees" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingAssetAtFairValueSales_019dd515-a40e-7a13-8be4-480ddb126181_negatedLabel_en-US" xlink:label="lab_onit_ServicingAssetAtFairValueSales" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Sales (3)</link:label>
    <link:label id="lab_onit_ServicingAssetAtFairValueSales_019cc591-a808-73f7-b1ab-c9fa1b44dfb5_negatedTerseLabel_en-US" xlink:label="lab_onit_ServicingAssetAtFairValueSales" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">MSR transfers</link:label>
    <link:label id="lab_onit_ServicingAssetAtFairValueSales_label_en-US" xlink:label="lab_onit_ServicingAssetAtFairValueSales" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset At Fair Value Sales</link:label>
    <link:label id="lab_onit_ServicingAssetAtFairValueSales_documentation_en-US" xlink:label="lab_onit_ServicingAssetAtFairValueSales" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing asset at fair value sales.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingAssetAtFairValueSales" xlink:href="onit-20260331.xsd#onit_ServicingAssetAtFairValueSales"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingAssetAtFairValueSales" xlink:to="lab_onit_ServicingAssetAtFairValueSales" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CorporateAndOtherMember_019cc591-a808-7cf0-8c82-b7d6882e4b52_verboseLabel_en-US" xlink:label="lab_us-gaap_CorporateAndOtherMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Corporate</link:label>
    <link:label id="lab_us-gaap_CorporateAndOtherMember_019cc591-a808-7032-9fc7-45206b71a88d_terseLabel_en-US" xlink:label="lab_us-gaap_CorporateAndOtherMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Corporate Segment and Other Operating Segment [Member]</link:label>
    <link:label id="lab_us-gaap_CorporateAndOtherMember_label_en-US" xlink:label="lab_us-gaap_CorporateAndOtherMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Corporate Segment and Other Operating Segment [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateAndOtherMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateAndOtherMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CorporateAndOtherMember" xlink:to="lab_us-gaap_CorporateAndOtherMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019cc591-a808-7841-b2db-012e338ab2df_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Changes in assets and liabilities:</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_DerecognitionOfFinancingLiability_019cc591-a808-7db2-a28b-ecedb6388df8_negatedTerseLabel_en-US" xlink:label="lab_onit_DerecognitionOfFinancingLiability" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Derecognition of financing liability</link:label>
    <link:label id="lab_onit_DerecognitionOfFinancingLiability_label_en-US" xlink:label="lab_onit_DerecognitionOfFinancingLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derecognition Of Financing Liability</link:label>
    <link:label id="lab_onit_DerecognitionOfFinancingLiability_documentation_en-US" xlink:label="lab_onit_DerecognitionOfFinancingLiability" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Derecognition Of Financing Liability</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_DerecognitionOfFinancingLiability" xlink:href="onit-20260331.xsd#onit_DerecognitionOfFinancingLiability"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_DerecognitionOfFinancingLiability" xlink:to="lab_onit_DerecognitionOfFinancingLiability" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_OLITNoteDiscountAndAmortizationAxis_019cc591-a808-7460-821e-8faf66806207_terseLabel_en-US" xlink:label="lab_onit_OLITNoteDiscountAndAmortizationAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OLIT Note discount and amortization [Axis]</link:label>
    <link:label id="lab_onit_OLITNoteDiscountAndAmortizationAxis_label_en-US" xlink:label="lab_onit_OLITNoteDiscountAndAmortizationAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">OLIT Note discount and amortization [Axis]</link:label>
    <link:label id="lab_onit_OLITNoteDiscountAndAmortizationAxis_documentation_en-US" xlink:label="lab_onit_OLITNoteDiscountAndAmortizationAxis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">OLIT Note discount and amortization</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OLITNoteDiscountAndAmortizationAxis" xlink:href="onit-20260331.xsd#onit_OLITNoteDiscountAndAmortizationAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_OLITNoteDiscountAndAmortizationAxis" xlink:to="lab_onit_OLITNoteDiscountAndAmortizationAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AdvancesAndMatchFundedAdvancesMember_019cc591-a891-71d5-9d6b-e69fe7d54f7b_terseLabel_en-US" xlink:label="lab_onit_AdvancesAndMatchFundedAdvancesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advances</link:label>
    <link:label id="lab_onit_AdvancesAndMatchFundedAdvancesMember_label_en-US" xlink:label="lab_onit_AdvancesAndMatchFundedAdvancesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advances And Match Funded Advances [Member]</link:label>
    <link:label id="lab_onit_AdvancesAndMatchFundedAdvancesMember_documentation_en-US" xlink:label="lab_onit_AdvancesAndMatchFundedAdvancesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Advances and match funded advances.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AdvancesAndMatchFundedAdvancesMember" xlink:href="onit-20260331.xsd#onit_AdvancesAndMatchFundedAdvancesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AdvancesAndMatchFundedAdvancesMember" xlink:to="lab_onit_AdvancesAndMatchFundedAdvancesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RetainedEarningsMember_019cc591-a75f-79ab-a24e-42b7d09b6aab_terseLabel_en-US" xlink:label="lab_us-gaap_RetainedEarningsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">(Accumulated Deficit) Retained Earnings</link:label>
    <link:label id="lab_us-gaap_RetainedEarningsMember_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retained Earnings [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RetainedEarningsMember" xlink:to="lab_us-gaap_RetainedEarningsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ScheduleOfSecuritizationReverseMortgageLoansBuyoutsAndFinancingLiabilitiesTableTextBlock_019cc591-a808-7d36-b5eb-90426a3d40e4_terseLabel_en-US" xlink:label="lab_onit_ScheduleOfSecuritizationReverseMortgageLoansBuyoutsAndFinancingLiabilitiesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule Of Securitization Reverse Mortgage Loans Buyouts And Financing Liabilities</link:label>
    <link:label id="lab_onit_ScheduleOfSecuritizationReverseMortgageLoansBuyoutsAndFinancingLiabilitiesTableTextBlock_label_en-US" xlink:label="lab_onit_ScheduleOfSecuritizationReverseMortgageLoansBuyoutsAndFinancingLiabilitiesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Securitization Reverse Mortgage Loans Buyouts And Financing Liabilities [Table Text Block]</link:label>
    <link:label id="lab_onit_ScheduleOfSecuritizationReverseMortgageLoansBuyoutsAndFinancingLiabilitiesTableTextBlock_documentation_en-US" xlink:label="lab_onit_ScheduleOfSecuritizationReverseMortgageLoansBuyoutsAndFinancingLiabilitiesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule Of Securitization Reverse Mortgage Loans Buyouts And Financing Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ScheduleOfSecuritizationReverseMortgageLoansBuyoutsAndFinancingLiabilitiesTableTextBlock" xlink:href="onit-20260331.xsd#onit_ScheduleOfSecuritizationReverseMortgageLoansBuyoutsAndFinancingLiabilitiesTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ScheduleOfSecuritizationReverseMortgageLoansBuyoutsAndFinancingLiabilitiesTableTextBlock" xlink:to="lab_onit_ScheduleOfSecuritizationReverseMortgageLoansBuyoutsAndFinancingLiabilitiesTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ScheduleOfAssetsThatRelateToContinuingInvolvementWithTransferredFinancialAssetsWithServicingRightsAndMaximumExposureToLossIncludingTheUnpaidPrincipalBalanceTableTextBlock_019cc591-a891-794d-be7d-b07ed14de8d5_terseLabel_en-US" xlink:label="lab_onit_ScheduleOfAssetsThatRelateToContinuingInvolvementWithTransferredFinancialAssetsWithServicingRightsAndMaximumExposureToLossIncludingTheUnpaidPrincipalBalanceTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Assets That Relate to Continuing Involvement with Transferred Financial Assets with Servicing Rights and Maximum Exposure to Loss Including the Unpaid Principal Balance</link:label>
    <link:label id="lab_onit_ScheduleOfAssetsThatRelateToContinuingInvolvementWithTransferredFinancialAssetsWithServicingRightsAndMaximumExposureToLossIncludingTheUnpaidPrincipalBalanceTableTextBlock_label_en-US" xlink:label="lab_onit_ScheduleOfAssetsThatRelateToContinuingInvolvementWithTransferredFinancialAssetsWithServicingRightsAndMaximumExposureToLossIncludingTheUnpaidPrincipalBalanceTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Assets That Relate To Continuing Involvement With Transferred Financial Assets With Servicing Rights And Maximum Exposure To Loss Including The Unpaid Principal Balance [Table Text Block]</link:label>
    <link:label id="lab_onit_ScheduleOfAssetsThatRelateToContinuingInvolvementWithTransferredFinancialAssetsWithServicingRightsAndMaximumExposureToLossIncludingTheUnpaidPrincipalBalanceTableTextBlock_documentation_en-US" xlink:label="lab_onit_ScheduleOfAssetsThatRelateToContinuingInvolvementWithTransferredFinancialAssetsWithServicingRightsAndMaximumExposureToLossIncludingTheUnpaidPrincipalBalanceTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule Of Assets That Relate To Continuing Involvement With Transferred Financial Assets With Servicing Rights And Maximum Exposure To Loss Including The Unpaid Principal Balance [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ScheduleOfAssetsThatRelateToContinuingInvolvementWithTransferredFinancialAssetsWithServicingRightsAndMaximumExposureToLossIncludingTheUnpaidPrincipalBalanceTableTextBlock" xlink:href="onit-20260331.xsd#onit_ScheduleOfAssetsThatRelateToContinuingInvolvementWithTransferredFinancialAssetsWithServicingRightsAndMaximumExposureToLossIncludingTheUnpaidPrincipalBalanceTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ScheduleOfAssetsThatRelateToContinuingInvolvementWithTransferredFinancialAssetsWithServicingRightsAndMaximumExposureToLossIncludingTheUnpaidPrincipalBalanceTableTextBlock" xlink:to="lab_onit_ScheduleOfAssetsThatRelateToContinuingInvolvementWithTransferredFinancialAssetsWithServicingRightsAndMaximumExposureToLossIncludingTheUnpaidPrincipalBalanceTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_HomeEquityConversionMortgageBackedSecurityMaximumClaimAmountDomain_019cc591-a891-7222-af12-ab51d26a5096_terseLabel_en-US" xlink:label="lab_onit_HomeEquityConversionMortgageBackedSecurityMaximumClaimAmountDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Home Equity Conversion Mortgage-Backed Security, Maximum Claim Amount [Domain]</link:label>
    <link:label id="lab_onit_HomeEquityConversionMortgageBackedSecurityMaximumClaimAmountDomain_label_en-US" xlink:label="lab_onit_HomeEquityConversionMortgageBackedSecurityMaximumClaimAmountDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Home Equity Conversion Mortgage-Backed Security, Maximum Claim Amount [Domain]</link:label>
    <link:label id="lab_onit_HomeEquityConversionMortgageBackedSecurityMaximumClaimAmountDomain_documentation_en-US" xlink:label="lab_onit_HomeEquityConversionMortgageBackedSecurityMaximumClaimAmountDomain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Home Equity Conversion Mortgage-Backed Security, Maximum Claim Amount [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_HomeEquityConversionMortgageBackedSecurityMaximumClaimAmountDomain" xlink:href="onit-20260331.xsd#onit_HomeEquityConversionMortgageBackedSecurityMaximumClaimAmountDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_HomeEquityConversionMortgageBackedSecurityMaximumClaimAmountDomain" xlink:to="lab_onit_HomeEquityConversionMortgageBackedSecurityMaximumClaimAmountDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019cc591-a891-75cf-9826-f13a034e4b4e_periodStartLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Cash, cash equivalents and restricted cash at beginning of year</link:label>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019cc591-a891-76e1-91d4-85052ef49235_periodEndLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Cash, cash equivalents and restricted cash at end of period</link:label>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019cc591-a891-796f-a700-f05bb6cf9b52_totalLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total cash, cash equivalents and restricted cash reported in the statements of cash flows</link:label>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_label_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:to="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeStatementAbstract_019cc591-a891-7b3b-9cee-8d619fa74c5a_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeStatementAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Statement [Abstract]</link:label>
    <link:label id="lab_us-gaap_IncomeStatementAbstract_label_en-US" xlink:label="lab_us-gaap_IncomeStatementAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Statement [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementAbstract" xlink:to="lab_us-gaap_IncomeStatementAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerTransfersFromToREO_019cc591-a75f-768b-a610-459664544741_terseLabel_en-US" xlink:label="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerTransfersFromToREO" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Transfer from (to) REO</link:label>
    <link:label id="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerTransfersFromToREO_label_en-US" xlink:label="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerTransfersFromToREO" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advances Payments On Behalf Of Borrower Transfers From (To) REO</link:label>
    <link:label id="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerTransfersFromToREO_documentation_en-US" xlink:label="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerTransfersFromToREO" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Advances Payments On Behalf Of Borrower Transfers From (To) REO</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AdvancesPaymentsOnBehalfOfBorrowerTransfersFromToREO" xlink:href="onit-20260331.xsd#onit_AdvancesPaymentsOnBehalfOfBorrowerTransfersFromToREO"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AdvancesPaymentsOnBehalfOfBorrowerTransfersFromToREO" xlink:to="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerTransfersFromToREO" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CustomerConcentrationRiskMember_019cc591-a808-7bc4-8dbf-1527d4ca623d_terseLabel_en-US" xlink:label="lab_us-gaap_CustomerConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Customer Concentration Risk</link:label>
    <link:label id="lab_us-gaap_CustomerConcentrationRiskMember_label_en-US" xlink:label="lab_us-gaap_CustomerConcentrationRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer Concentration Risk [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CustomerConcentrationRiskMember" xlink:to="lab_us-gaap_CustomerConcentrationRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProfitLoss_019cc591-a891-711e-9cb0-300815c3b4f5_terseLabel_en-US" xlink:label="lab_us-gaap_ProfitLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net income</link:label>
    <link:label id="lab_us-gaap_ProfitLoss_label_en-US" xlink:label="lab_us-gaap_ProfitLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss), Including Portion Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfitLoss"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProfitLoss" xlink:to="lab_us-gaap_ProfitLoss" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_RestatementDoesNotRequireRecoveryTextBlock_terseLabel_en-US" xlink:label="lab_ecd_RestatementDoesNotRequireRecoveryTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restatement does not require Recovery</link:label>
    <link:label id="lab_ecd_RestatementDoesNotRequireRecoveryTextBlock_label_en-US" xlink:label="lab_ecd_RestatementDoesNotRequireRecoveryTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restatement Does Not Require Recovery [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_RestatementDoesNotRequireRecoveryTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_RestatementDoesNotRequireRecoveryTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_RestatementDoesNotRequireRecoveryTextBlock" xlink:to="lab_ecd_RestatementDoesNotRequireRecoveryTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_WarrantyRepurchaseDemandsUnpaidPrincipalBalance_019cc591-a808-7441-958e-fcd775aef24a_terseLabel_en-US" xlink:label="lab_onit_WarrantyRepurchaseDemandsUnpaidPrincipalBalance" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Warranty repurchase demands unpaid principal balance</link:label>
    <link:label id="lab_onit_WarrantyRepurchaseDemandsUnpaidPrincipalBalance_label_en-US" xlink:label="lab_onit_WarrantyRepurchaseDemandsUnpaidPrincipalBalance" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Warranty Repurchase Demands Unpaid Principal Balance</link:label>
    <link:label id="lab_onit_WarrantyRepurchaseDemandsUnpaidPrincipalBalance_documentation_en-US" xlink:label="lab_onit_WarrantyRepurchaseDemandsUnpaidPrincipalBalance" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents unpaid principal balance related to outstanding representation and warranty repurchase demands as of the end of the period.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_WarrantyRepurchaseDemandsUnpaidPrincipalBalance" xlink:href="onit-20260331.xsd#onit_WarrantyRepurchaseDemandsUnpaidPrincipalBalance"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_WarrantyRepurchaseDemandsUnpaidPrincipalBalance" xlink:to="lab_onit_WarrantyRepurchaseDemandsUnpaidPrincipalBalance" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeNotionalAmount_019cc591-a808-7d0a-9cb1-d09319cfa069_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeNotionalAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Notional balance</link:label>
    <link:label id="lab_us-gaap_DerivativeNotionalAmount_label_en-US" xlink:label="lab_us-gaap_DerivativeNotionalAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Notional Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeNotionalAmount" xlink:to="lab_us-gaap_DerivativeNotionalAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_019cc591-a808-76b8-88a9-2b1bcdc29944_terseLabel_en-US" xlink:label="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements [Abstract]</link:label>
    <link:label id="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_label_en-US" xlink:label="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:to="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherRealEstate_019cc591-a891-75e9-ba70-d27615a17563_terseLabel_en-US" xlink:label="lab_us-gaap_OtherRealEstate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">REO ($97.7 and $81.0 related to VIEs)</link:label>
    <link:label id="lab_us-gaap_OtherRealEstate_label_en-US" xlink:label="lab_us-gaap_OtherRealEstate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Real Estate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherRealEstate" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherRealEstate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherRealEstate" xlink:to="lab_us-gaap_OtherRealEstate" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationAssetTransfersOutOfLevel3ToReverseMortgageLoansAtFairValue_019cc591-a75f-7b4e-a59a-f276e135f177_terseLabel_en-US" xlink:label="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationAssetTransfersOutOfLevel3ToReverseMortgageLoansAtFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reverse mortgage loans, at fair value (2)</link:label>
    <link:label id="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationAssetTransfersOutOfLevel3ToReverseMortgageLoansAtFairValue_label_en-US" xlink:label="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationAssetTransfersOutOfLevel3ToReverseMortgageLoansAtFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Measurement With Unobservable Inputs Reconciliation Asset Transfers Out of Level 3 To Reverse Mortgage Loans At Fair Value</link:label>
    <link:label id="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationAssetTransfersOutOfLevel3ToReverseMortgageLoansAtFairValue_documentation_en-US" xlink:label="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationAssetTransfersOutOfLevel3ToReverseMortgageLoansAtFairValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fair Value Measurement With Unobservable Inputs Reconciliation Asset Transfers Out of Level 3 To Reverse Mortgage Loans At Fair Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_FairValueMeasurementWithUnobservableInputsReconciliationAssetTransfersOutOfLevel3ToReverseMortgageLoansAtFairValue" xlink:href="onit-20260331.xsd#onit_FairValueMeasurementWithUnobservableInputsReconciliationAssetTransfersOutOfLevel3ToReverseMortgageLoansAtFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_FairValueMeasurementWithUnobservableInputsReconciliationAssetTransfersOutOfLevel3ToReverseMortgageLoansAtFairValue" xlink:to="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationAssetTransfersOutOfLevel3ToReverseMortgageLoansAtFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_CityAreaCode_019cc591-a75e-7a4f-b8aa-49963d564d81_terseLabel_en-US" xlink:label="lab_dei_CityAreaCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">City Area Code</link:label>
    <link:label id="lab_dei_CityAreaCode_label_en-US" xlink:label="lab_dei_CityAreaCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">City Area Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CityAreaCode" xlink:to="lab_dei_CityAreaCode" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock_019cc591-a75f-75de-b7c9-1b1e578fafda_terseLabel_en-US" xlink:label="lab_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Changes in Allowance For Losses</link:label>
    <link:label id="lab_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock_label_en-US" xlink:label="lab_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Allowance for Credit Loss [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock" xlink:to="lab_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardTmgHowMnpiCnsdrdTextBlock_terseLabel_en-US" xlink:label="lab_ecd_AwardTmgHowMnpiCnsdrdTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Timing, How MNPI Considered</link:label>
    <link:label id="lab_ecd_AwardTmgHowMnpiCnsdrdTextBlock_label_en-US" xlink:label="lab_ecd_AwardTmgHowMnpiCnsdrdTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Timing, How MNPI Considered [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgHowMnpiCnsdrdTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AwardTmgHowMnpiCnsdrdTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardTmgHowMnpiCnsdrdTextBlock" xlink:to="lab_ecd_AwardTmgHowMnpiCnsdrdTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_RunoffSettlementsAndOtherFinancingLiability_019cc591-a808-7e5b-80bd-5a3af270bfff_negatedTerseLabel_en-US" xlink:label="lab_onit_RunoffSettlementsAndOtherFinancingLiability" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Realization of cash flows</link:label>
    <link:label id="lab_onit_RunoffSettlementsAndOtherFinancingLiability_label_en-US" xlink:label="lab_onit_RunoffSettlementsAndOtherFinancingLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Runoff Settlements And Other Financing Liability</link:label>
    <link:label id="lab_onit_RunoffSettlementsAndOtherFinancingLiability_documentation_en-US" xlink:label="lab_onit_RunoffSettlementsAndOtherFinancingLiability" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This represents the decrease in the value of financing liability due to portfolio runoff, settlements and other.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_RunoffSettlementsAndOtherFinancingLiability" xlink:href="onit-20260331.xsd#onit_RunoffSettlementsAndOtherFinancingLiability"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_RunoffSettlementsAndOtherFinancingLiability" xlink:to="lab_onit_RunoffSettlementsAndOtherFinancingLiability" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_InterestExpenseTextBlock_019cc591-a75f-7f80-884f-eb9ab9407ca2_terseLabel_en-US" xlink:label="lab_onit_InterestExpenseTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest Expense</link:label>
    <link:label id="lab_onit_InterestExpenseTextBlock_label_en-US" xlink:label="lab_onit_InterestExpenseTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Expense [Text Block]</link:label>
    <link:label id="lab_onit_InterestExpenseTextBlock_documentation_en-US" xlink:label="lab_onit_InterestExpenseTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The disclosure of the cost of all borrowed funds accounted for as interest expense that was charged against earnings during the period, by category of interest-bearing liabilities.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_InterestExpenseTextBlock" xlink:href="onit-20260331.xsd#onit_InterestExpenseTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_InterestExpenseTextBlock" xlink:to="lab_onit_InterestExpenseTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases_019cc591-a891-7102-b953-df013701676e_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Uncommitted available borrowing capacity</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases" xlink:to="lab_us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_PercentageOfTheLimitedLiabilityCompanyInterest_019cc591-a891-7e8a-8667-50581c6b64ba_terseLabel_en-US" xlink:label="lab_onit_PercentageOfTheLimitedLiabilityCompanyInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage Of The Limited Liability Company Interest</link:label>
    <link:label id="lab_onit_PercentageOfTheLimitedLiabilityCompanyInterest_label_en-US" xlink:label="lab_onit_PercentageOfTheLimitedLiabilityCompanyInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage Of The Limited Liability Company Interest</link:label>
    <link:label id="lab_onit_PercentageOfTheLimitedLiabilityCompanyInterest_documentation_en-US" xlink:label="lab_onit_PercentageOfTheLimitedLiabilityCompanyInterest" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Percentage Of The Limited Liability Company Interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_PercentageOfTheLimitedLiabilityCompanyInterest" xlink:href="onit-20260331.xsd#onit_PercentageOfTheLimitedLiabilityCompanyInterest"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_PercentageOfTheLimitedLiabilityCompanyInterest" xlink:to="lab_onit_PercentageOfTheLimitedLiabilityCompanyInterest" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019cc591-a75e-7107-aac3-dcbbde7be2ab_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash flows from investing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PvpTable_terseLabel_en-US" xlink:label="lab_ecd_PvpTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pay vs Performance Disclosure</link:label>
    <link:label id="lab_ecd_PvpTable_label_en-US" xlink:label="lab_ecd_PvpTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pay vs Performance Disclosure [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PvpTable" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_PvpTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PvpTable" xlink:to="lab_ecd_PvpTable" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_TransfersRelatedToHomeEquityConversionMortgageBackedSecurityRepurchasesValue_019cc591-a75f-7962-a39f-b49fdcf9a5fe_terseLabel_en-US" xlink:label="lab_onit_TransfersRelatedToHomeEquityConversionMortgageBackedSecurityRepurchasesValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Transfers, repurchase securities, amount</link:label>
    <link:label id="lab_onit_TransfersRelatedToHomeEquityConversionMortgageBackedSecurityRepurchasesValue_label_en-US" xlink:label="lab_onit_TransfersRelatedToHomeEquityConversionMortgageBackedSecurityRepurchasesValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Transfers Related To Home Equity Conversion Mortgage-Backed Security Repurchases, Value</link:label>
    <link:label id="lab_onit_TransfersRelatedToHomeEquityConversionMortgageBackedSecurityRepurchasesValue_documentation_en-US" xlink:label="lab_onit_TransfersRelatedToHomeEquityConversionMortgageBackedSecurityRepurchasesValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This represents the amount of transfers related to HMBS repurchase securities.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_TransfersRelatedToHomeEquityConversionMortgageBackedSecurityRepurchasesValue" xlink:href="onit-20260331.xsd#onit_TransfersRelatedToHomeEquityConversionMortgageBackedSecurityRepurchasesValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_TransfersRelatedToHomeEquityConversionMortgageBackedSecurityRepurchasesValue" xlink:to="lab_onit_TransfersRelatedToHomeEquityConversionMortgageBackedSecurityRepurchasesValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ServicingAssetsAtFairValueTable_019cc591-a892-7615-ac1b-4dc21fd8580f_terseLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetsAtFairValueTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing Asset at Fair Value, Activity [Table]</link:label>
    <link:label id="lab_us-gaap_ServicingAssetsAtFairValueTable_label_en-US" xlink:label="lab_us-gaap_ServicingAssetsAtFairValueTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset at Fair Value, Activity [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetsAtFairValueTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetsAtFairValueTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueTable" xlink:to="lab_us-gaap_ServicingAssetsAtFairValueTable" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_OtherAdjustmentMortgageLoansHeldForSale_019cc591-a808-7d3b-8ab3-c87d189b74ed_terseLabel_en-US" xlink:label="lab_onit_OtherAdjustmentMortgageLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other (3)</link:label>
    <link:label id="lab_onit_OtherAdjustmentMortgageLoansHeldForSale_label_en-US" xlink:label="lab_onit_OtherAdjustmentMortgageLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Adjustment Mortgage Loans Held For Sale</link:label>
    <link:label id="lab_onit_OtherAdjustmentMortgageLoansHeldForSale_documentation_en-US" xlink:label="lab_onit_OtherAdjustmentMortgageLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents amount of addition or reductions in principal on mortgage loans held for sale other than foreclosures, costs of mortgages sold, and amortization of premium during the reporting period.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OtherAdjustmentMortgageLoansHeldForSale" xlink:href="onit-20260331.xsd#onit_OtherAdjustmentMortgageLoansHeldForSale"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_OtherAdjustmentMortgageLoansHeldForSale" xlink:to="lab_onit_OtherAdjustmentMortgageLoansHeldForSale" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherLiabilities_019cc591-a891-77ca-bf85-124c5af2cb47_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilities" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other liabilities ($27.9 and $10.2 carried at fair value)</link:label>
    <link:label id="lab_us-gaap_OtherLiabilities_019cc591-a891-7d4c-b888-058ab570d039_totalLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total other liabilities</link:label>
    <link:label id="lab_us-gaap_OtherLiabilities_label_en-US" xlink:label="lab_us-gaap_OtherLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLiabilities" xlink:to="lab_us-gaap_OtherLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_HedgeCoverageRatio_019cc591-a808-7d99-a7ad-494d933d6df7_terseLabel_en-US" xlink:label="lab_onit_HedgeCoverageRatio" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Minimum Hedge Coverage Ratio</link:label>
    <link:label id="lab_onit_HedgeCoverageRatio_label_en-US" xlink:label="lab_onit_HedgeCoverageRatio" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Hedge Coverage Ratio</link:label>
    <link:label id="lab_onit_HedgeCoverageRatio_documentation_en-US" xlink:label="lab_onit_HedgeCoverageRatio" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Hedge Coverage Ratio</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_HedgeCoverageRatio" xlink:href="onit-20260331.xsd#onit_HedgeCoverageRatio"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_HedgeCoverageRatio" xlink:to="lab_onit_HedgeCoverageRatio" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeTaxReceivable_019cc591-a891-770e-b345-150a3fb8ee30_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReceivable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income taxes receivable</link:label>
    <link:label id="lab_us-gaap_IncomeTaxReceivable_label_en-US" xlink:label="lab_us-gaap_IncomeTaxReceivable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Taxes Receivable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReceivable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReceivable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxReceivable" xlink:to="lab_us-gaap_IncomeTaxReceivable" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_USVIBureauOfInternalRevenueMember_019cc591-a891-7741-a6d6-dd89d135722f_terseLabel_en-US" xlink:label="lab_onit_USVIBureauOfInternalRevenueMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">USVI Bureau of Internal Revenue</link:label>
    <link:label id="lab_onit_USVIBureauOfInternalRevenueMember_label_en-US" xlink:label="lab_onit_USVIBureauOfInternalRevenueMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">USVI Bureau of Internal Revenue [Member]</link:label>
    <link:label id="lab_onit_USVIBureauOfInternalRevenueMember_documentation_en-US" xlink:label="lab_onit_USVIBureauOfInternalRevenueMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">USVI Bureau of Internal Revenue</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_USVIBureauOfInternalRevenueMember" xlink:href="onit-20260331.xsd#onit_USVIBureauOfInternalRevenueMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_USVIBureauOfInternalRevenueMember" xlink:to="lab_onit_USVIBureauOfInternalRevenueMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_019cc591-a75e-7499-a7de-d51b103ef243_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">REO (Other assets)</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LateFeeIncomeGeneratedByServicingFinancialAssetsAmount_019cc591-a808-7ff8-860d-a65c7509a9a0_terseLabel_en-US" xlink:label="lab_us-gaap_LateFeeIncomeGeneratedByServicingFinancialAssetsAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Late charges</link:label>
    <link:label id="lab_us-gaap_LateFeeIncomeGeneratedByServicingFinancialAssetsAmount_label_en-US" xlink:label="lab_us-gaap_LateFeeIncomeGeneratedByServicingFinancialAssetsAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Late Fee Income Generated by Servicing Financial Assets, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LateFeeIncomeGeneratedByServicingFinancialAssetsAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LateFeeIncomeGeneratedByServicingFinancialAssetsAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LateFeeIncomeGeneratedByServicingFinancialAssetsAmount" xlink:to="lab_us-gaap_LateFeeIncomeGeneratedByServicingFinancialAssetsAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TransfersAndServicingOfFinancialAssetsTextBlock_019cc591-a891-78ac-9a9d-ac47f5bbc8e3_verboseLabel_en-US" xlink:label="lab_us-gaap_TransfersAndServicingOfFinancialAssetsTextBlock" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Mortgage Servicing</link:label>
    <link:label id="lab_us-gaap_TransfersAndServicingOfFinancialAssetsTextBlock_label_en-US" xlink:label="lab_us-gaap_TransfersAndServicingOfFinancialAssetsTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Transfers and Servicing of Financial Assets [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialAssetsTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialAssetsTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialAssetsTextBlock" xlink:to="lab_us-gaap_TransfersAndServicingOfFinancialAssetsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock_019cc591-a808-748d-8f76-9b1d42d1fb44_terseLabel_en-US" xlink:label="lab_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Organization and Basis of Presentation</link:label>
    <link:label id="lab_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock_label_en-US" xlink:label="lab_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock" xlink:to="lab_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_019cc591-a891-7436-8517-e8461dbec708_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Supplemental non-cash investing and financing activities:</link:label>
    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_label_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplemental Cash Flow Information [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SupplementalCashFlowInformationAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract" xlink:to="lab_us-gaap_SupplementalCashFlowInformationAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_OtherPerfMeasureAmt_terseLabel_en-US" xlink:label="lab_ecd_OtherPerfMeasureAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Performance Measure, Amount</link:label>
    <link:label id="lab_ecd_OtherPerfMeasureAmt_label_en-US" xlink:label="lab_ecd_OtherPerfMeasureAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Performance Measure, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_OtherPerfMeasureAmt" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_OtherPerfMeasureAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_OtherPerfMeasureAmt" xlink:to="lab_ecd_OtherPerfMeasureAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsOfDebtIssuanceCosts_019cc591-a75f-7741-83c8-80f49285fba8_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtIssuanceCosts" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Payment of debt issuance costs</link:label>
    <link:label id="lab_us-gaap_PaymentsOfDebtIssuanceCosts_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtIssuanceCosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments of Debt Issuance Costs</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfDebtIssuanceCosts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfDebtIssuanceCosts" xlink:to="lab_us-gaap_PaymentsOfDebtIssuanceCosts" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTable_019cc591-a808-75d3-82ce-d5db05fe4564_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Banking Regulation, Mortgage Banking, Capital Requirement [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTable_label_en-US" xlink:label="lab_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Banking Regulation, Mortgage Banking, Capital Requirement [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTable" xlink:to="lab_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTable" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_GainLossOnInterestRateDerivativeInstruments_019cc591-a891-7e89-8f51-fc3a1cede265_terseLabel_en-US" xlink:label="lab_onit_GainLossOnInterestRateDerivativeInstruments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in fair value of IRLCs</link:label>
    <link:label id="lab_onit_GainLossOnInterestRateDerivativeInstruments_label_en-US" xlink:label="lab_onit_GainLossOnInterestRateDerivativeInstruments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain Loss On Interest Rate Derivative Instruments</link:label>
    <link:label id="lab_onit_GainLossOnInterestRateDerivativeInstruments_documentation_en-US" xlink:label="lab_onit_GainLossOnInterestRateDerivativeInstruments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the net increase or decrease in the fair value of the interest rate derivative or group of derivatives.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_GainLossOnInterestRateDerivativeInstruments" xlink:href="onit-20260331.xsd#onit_GainLossOnInterestRateDerivativeInstruments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_GainLossOnInterestRateDerivativeInstruments" xlink:to="lab_onit_GainLossOnInterestRateDerivativeInstruments" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_MeasurementInputWeightedAverageCostToServiceMember_019cc591-a891-79e2-bb41-dd18c737d3c2_terseLabel_en-US" xlink:label="lab_onit_MeasurementInputWeightedAverageCostToServiceMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cost to service (in dollars)</link:label>
    <link:label id="lab_onit_MeasurementInputWeightedAverageCostToServiceMember_label_en-US" xlink:label="lab_onit_MeasurementInputWeightedAverageCostToServiceMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Input, Weighted Average Cost To Service [Member]</link:label>
    <link:label id="lab_onit_MeasurementInputWeightedAverageCostToServiceMember_documentation_en-US" xlink:label="lab_onit_MeasurementInputWeightedAverageCostToServiceMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Measurement Input, Weighted Average Cost To Service [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_MeasurementInputWeightedAverageCostToServiceMember" xlink:href="onit-20260331.xsd#onit_MeasurementInputWeightedAverageCostToServiceMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_MeasurementInputWeightedAverageCostToServiceMember" xlink:to="lab_onit_MeasurementInputWeightedAverageCostToServiceMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_HomeEquityConversionMortgageBackedSecurityMaximumClaimAmountAxis_019cc591-a808-7f8f-b5fc-ce31fb0ce1ba_terseLabel_en-US" xlink:label="lab_onit_HomeEquityConversionMortgageBackedSecurityMaximumClaimAmountAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Home Equity Conversion Mortgage-Backed Security, Maximum Claim Amount [Axis]</link:label>
    <link:label id="lab_onit_HomeEquityConversionMortgageBackedSecurityMaximumClaimAmountAxis_label_en-US" xlink:label="lab_onit_HomeEquityConversionMortgageBackedSecurityMaximumClaimAmountAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Home Equity Conversion Mortgage-Backed Security, Maximum Claim Amount [Axis]</link:label>
    <link:label id="lab_onit_HomeEquityConversionMortgageBackedSecurityMaximumClaimAmountAxis_documentation_en-US" xlink:label="lab_onit_HomeEquityConversionMortgageBackedSecurityMaximumClaimAmountAxis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Home Equity Conversion Mortgage-Backed Security, Maximum Claim Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_HomeEquityConversionMortgageBackedSecurityMaximumClaimAmountAxis" xlink:href="onit-20260331.xsd#onit_HomeEquityConversionMortgageBackedSecurityMaximumClaimAmountAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_HomeEquityConversionMortgageBackedSecurityMaximumClaimAmountAxis" xlink:to="lab_onit_HomeEquityConversionMortgageBackedSecurityMaximumClaimAmountAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingAssetAtFairValueDerecognition_019cc591-a75e-7754-b0d9-1f40e159af28_negatedTerseLabel_en-US" xlink:label="lab_onit_ServicingAssetAtFairValueDerecognition" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">MSR, at fair value</link:label>
    <link:label id="lab_onit_ServicingAssetAtFairValueDerecognition_label_en-US" xlink:label="lab_onit_ServicingAssetAtFairValueDerecognition" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset At Fair Value, Derecognition</link:label>
    <link:label id="lab_onit_ServicingAssetAtFairValueDerecognition_documentation_en-US" xlink:label="lab_onit_ServicingAssetAtFairValueDerecognition" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing Asset At Fair Value, Derecognition</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingAssetAtFairValueDerecognition" xlink:href="onit-20260331.xsd#onit_ServicingAssetAtFairValueDerecognition"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingAssetAtFairValueDerecognition" xlink:to="lab_onit_ServicingAssetAtFairValueDerecognition" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeInstrumentRiskAxis_019cc591-a891-7f9b-9f24-034604c9cb03_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instrument [Axis]</link:label>
    <link:label id="lab_us-gaap_DerivativeInstrumentRiskAxis_label_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instrument [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis" xlink:to="lab_us-gaap_DerivativeInstrumentRiskAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RestrictedCash_019cc591-a891-720a-b34b-b2349f2c667f_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedCash" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other restricted cash</link:label>
    <link:label id="lab_us-gaap_RestrictedCash_label_en-US" xlink:label="lab_us-gaap_RestrictedCash" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restricted Cash</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCash" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCash"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RestrictedCash" xlink:to="lab_us-gaap_RestrictedCash" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_DelinquentLoansMember_019cc591-a891-77d2-ac9e-2a74abd4ebbb_terseLabel_en-US" xlink:label="lab_onit_DelinquentLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Delinquent Loans</link:label>
    <link:label id="lab_onit_DelinquentLoansMember_label_en-US" xlink:label="lab_onit_DelinquentLoansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Delinquent Loans [Member]</link:label>
    <link:label id="lab_onit_DelinquentLoansMember_documentation_en-US" xlink:label="lab_onit_DelinquentLoansMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Delinquent Loans [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_DelinquentLoansMember" xlink:href="onit-20260331.xsd#onit_DelinquentLoansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_DelinquentLoansMember" xlink:to="lab_onit_DelinquentLoansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AdvancesAndMatchFundedAdvancesFairValueDisclosure_019cc591-a891-78f0-9836-4c7c00592085_terseLabel_en-US" xlink:label="lab_onit_AdvancesAndMatchFundedAdvancesFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advances, net</link:label>
    <link:label id="lab_onit_AdvancesAndMatchFundedAdvancesFairValueDisclosure_label_en-US" xlink:label="lab_onit_AdvancesAndMatchFundedAdvancesFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advances and Match Funded Advances Fair Value Disclosure</link:label>
    <link:label id="lab_onit_AdvancesAndMatchFundedAdvancesFairValueDisclosure_documentation_en-US" xlink:label="lab_onit_AdvancesAndMatchFundedAdvancesFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents advances and match funded advances.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AdvancesAndMatchFundedAdvancesFairValueDisclosure" xlink:href="onit-20260331.xsd#onit_AdvancesAndMatchFundedAdvancesFairValueDisclosure"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AdvancesAndMatchFundedAdvancesFairValueDisclosure" xlink:to="lab_onit_AdvancesAndMatchFundedAdvancesFairValueDisclosure" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_MSRValuationAdjustmentsNetTextBlock_019cc591-a808-7aa8-900b-5301231700a1_terseLabel_en-US" xlink:label="lab_onit_MSRValuationAdjustmentsNetTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MSR Valuation Adjustments, Net</link:label>
    <link:label id="lab_onit_MSRValuationAdjustmentsNetTextBlock_label_en-US" xlink:label="lab_onit_MSRValuationAdjustmentsNetTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">MSR Valuation Adjustments, Net [Text Block]</link:label>
    <link:label id="lab_onit_MSRValuationAdjustmentsNetTextBlock_documentation_en-US" xlink:label="lab_onit_MSRValuationAdjustmentsNetTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">MSR Valuation Adjustments, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_MSRValuationAdjustmentsNetTextBlock" xlink:href="onit-20260331.xsd#onit_MSRValuationAdjustmentsNetTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_MSRValuationAdjustmentsNetTextBlock" xlink:to="lab_onit_MSRValuationAdjustmentsNetTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityDomain_019cc591-a891-7e0f-b8d4-67fc1bd948c5_terseLabel_en-US" xlink:label="lab_dei_EntityDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity [Domain]</link:label>
    <link:label id="lab_dei_EntityDomain_label_en-US" xlink:label="lab_dei_EntityDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityDomain" xlink:to="lab_dei_EntityDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_019cc591-a808-7520-9b3c-10db78b25732_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by investing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Provided by (Used in) Investing Activity, Including Discontinued Operation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember_terseLabel_en-US" xlink:label="lab_ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember"/>
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    <link:label id="lab_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_019cc591-a891-7c79-b735-894609bd4ab6_terseLabel_en-US" xlink:label="lab_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans Insured or Guaranteed by Government Authorities [Axis]</link:label>
    <link:label id="lab_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_label_en-US" xlink:label="lab_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Insured or Guaranteed by Government Authorities [Axis]</link:label>
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    <link:label id="lab_us-gaap_InterestPaidNet_019cc591-a75e-73ab-b008-84b4439ac016_terseLabel_en-US" xlink:label="lab_us-gaap_InterestPaidNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest paid</link:label>
    <link:label id="lab_us-gaap_InterestPaidNet_label_en-US" xlink:label="lab_us-gaap_InterestPaidNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Paid, Excluding Capitalized Interest, Operating Activity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPaidNet" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPaidNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestPaidNet" xlink:to="lab_us-gaap_InterestPaidNet" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentFiscalYearFocus_019cc591-a75e-7ae1-9b06-9c1f0ba03cf5_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalYearFocus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Fiscal Year Focus</link:label>
    <link:label id="lab_dei_DocumentFiscalYearFocus_label_en-US" xlink:label="lab_dei_DocumentFiscalYearFocus" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Fiscal Year Focus</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalYearFocus"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentFiscalYearFocus" xlink:to="lab_dei_DocumentFiscalYearFocus" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ServicingAssetsAtFairValueLineItems_019cc591-a808-7a3d-b0e9-e3de72f4d8a6_terseLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetsAtFairValueLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing Assets at Fair Value [Line Items]</link:label>
    <link:label id="lab_us-gaap_ServicingAssetsAtFairValueLineItems_label_en-US" xlink:label="lab_us-gaap_ServicingAssetsAtFairValueLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Assets at Fair Value [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetsAtFairValueLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetsAtFairValueLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingAssetsAtFairValueLineItems" xlink:to="lab_us-gaap_ServicingAssetsAtFairValueLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_019cc591-a808-703d-8d5f-0804a699cb65_terseLabel_en-US" xlink:label="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Basis of Presentation</link:label>
    <link:label id="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Basis of Accounting, Policy [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BasisOfAccountingPolicyPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:to="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_DebtInstrumentPremiumPercentage_019dd4d5-4e83-7150-857f-d4a6380770ee_terseLabel_en-US" xlink:label="lab_onit_DebtInstrumentPremiumPercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Premium Percentage</link:label>
    <link:label id="lab_onit_DebtInstrumentPremiumPercentage_label_en-US" xlink:label="lab_onit_DebtInstrumentPremiumPercentage" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Premium Percentage</link:label>
    <link:label id="lab_onit_DebtInstrumentPremiumPercentage_documentation_en-US" xlink:label="lab_onit_DebtInstrumentPremiumPercentage" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instrument, Premium Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_DebtInstrumentPremiumPercentage" xlink:href="onit-20260331.xsd#onit_DebtInstrumentPremiumPercentage"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_DebtInstrumentPremiumPercentage" xlink:to="lab_onit_DebtInstrumentPremiumPercentage" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019cc591-a808-710e-9fff-6296a74edaf6_terseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Percent</link:label>
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Percent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
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    <link:label id="lab_us-gaap_LienCategoryDomain_019cc591-a808-779d-8a59-dd9ed5b4ef8c_terseLabel_en-US" xlink:label="lab_us-gaap_LienCategoryDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Lien Category [Domain]</link:label>
    <link:label id="lab_us-gaap_LienCategoryDomain_label_en-US" xlink:label="lab_us-gaap_LienCategoryDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lien Category [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LienCategoryDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LienCategoryDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LienCategoryDomain" xlink:to="lab_us-gaap_LienCategoryDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019cc591-a808-7303-bc75-e4c429adb95d_terseLabel_en-US" xlink:label="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Carrying Value</link:label>
    <link:label id="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_label_en-US" xlink:label="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reported Value Measurement [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
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    <link:label id="lab_onit_SubservicingAgreementTerm_019df460-114e-7966-9599-43baccd57bb6_terseLabel_en-US" xlink:label="lab_onit_SubservicingAgreementTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subservicing Agreement, Term</link:label>
    <link:label id="lab_onit_SubservicingAgreementTerm_label_en-US" xlink:label="lab_onit_SubservicingAgreementTerm" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subservicing Agreement, Term</link:label>
    <link:label id="lab_onit_SubservicingAgreementTerm_documentation_en-US" xlink:label="lab_onit_SubservicingAgreementTerm" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Subservicing Agreement, Term</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_SubservicingAgreementTerm" xlink:href="onit-20260331.xsd#onit_SubservicingAgreementTerm"/>
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    <link:label id="lab_us-gaap_EquityAbstract_019cc591-a891-7e0a-a677-f93d083a175c_terseLabel_en-US" xlink:label="lab_us-gaap_EquityAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity [Abstract]</link:label>
    <link:label id="lab_us-gaap_EquityAbstract_label_en-US" xlink:label="lab_us-gaap_EquityAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityAbstract" xlink:to="lab_us-gaap_EquityAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SeniorNotes_019cc591-a75e-7957-96dd-c715ccf234e2_terseLabel_en-US" xlink:label="lab_us-gaap_SeniorNotes" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Senior notes, net</link:label>
    <link:label id="lab_us-gaap_SeniorNotes_019cc591-a75e-7e4d-8aec-3f40b7c394b3_verboseLabel_en-US" xlink:label="lab_us-gaap_SeniorNotes" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Senior notes</link:label>
    <link:label id="lab_us-gaap_SeniorNotes_label_en-US" xlink:label="lab_us-gaap_SeniorNotes" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Senior Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotes" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorNotes"/>
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    <link:label id="lab_onit_SeriesTwoThousandFifteenVariableFundingNotesOneMember_019cc591-a75e-7bfc-97db-6a896d815be7_terseLabel_en-US" xlink:label="lab_onit_SeriesTwoThousandFifteenVariableFundingNotesOneMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advance Receivables Backed Notes, Series 2015-VF1</link:label>
    <link:label id="lab_onit_SeriesTwoThousandFifteenVariableFundingNotesOneMember_label_en-US" xlink:label="lab_onit_SeriesTwoThousandFifteenVariableFundingNotesOneMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Series Two Thousand Fifteen Variable Funding Notes One [Member]</link:label>
    <link:label id="lab_onit_SeriesTwoThousandFifteenVariableFundingNotesOneMember_documentation_en-US" xlink:label="lab_onit_SeriesTwoThousandFifteenVariableFundingNotesOneMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Series two thousand fifteen variable funding notes one.</link:label>
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    <link:label id="lab_us-gaap_DebtAndEquitySecuritiesGainLoss_label_en-US" xlink:label="lab_us-gaap_DebtAndEquitySecuritiesGainLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt and Equity Securities, Gain (Loss)</link:label>
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    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:to="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueDisposals_019cc591-a808-7501-ab17-7041b35016ee_terseLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueDisposals" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sales (3)</link:label>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueDisposals_label_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueDisposals" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset at Fair Value, Disposals</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueDisposals" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueDisposals"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingAssetAtFairValueDisposals" xlink:to="lab_us-gaap_ServicingAssetAtFairValueDisposals" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AllowanceForNotesAndLoansReceivableCurrent_019cc591-a808-7d00-8246-4e6451079d86_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_AllowanceForNotesAndLoansReceivableCurrent" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Allowance for financing notes</link:label>
    <link:label id="lab_us-gaap_AllowanceForNotesAndLoansReceivableCurrent_019cc591-a808-767a-8c61-deabb78ea995_terseLabel_en-US" xlink:label="lab_us-gaap_AllowanceForNotesAndLoansReceivableCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Allowance for financing notes</link:label>
    <link:label id="lab_us-gaap_AllowanceForNotesAndLoansReceivableCurrent_019cc591-a808-7a3e-aea4-befcc6ed312c_periodStartLabel_en-US" xlink:label="lab_us-gaap_AllowanceForNotesAndLoansReceivableCurrent" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance</link:label>
    <link:label id="lab_us-gaap_AllowanceForNotesAndLoansReceivableCurrent_019cc591-a808-7e71-b4a0-bd4e92bec7ca_periodEndLabel_en-US" xlink:label="lab_us-gaap_AllowanceForNotesAndLoansReceivableCurrent" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance</link:label>
    <link:label id="lab_us-gaap_AllowanceForNotesAndLoansReceivableCurrent_label_en-US" xlink:label="lab_us-gaap_AllowanceForNotesAndLoansReceivableCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Allowance for Credit Loss, Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForNotesAndLoansReceivableCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForNotesAndLoansReceivableCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AllowanceForNotesAndLoansReceivableCurrent" xlink:to="lab_us-gaap_AllowanceForNotesAndLoansReceivableCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherCommitmentsLineItems_019cc591-a891-77e2-b548-38eb06d56210_terseLabel_en-US" xlink:label="lab_us-gaap_OtherCommitmentsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Commitments [Line Items]</link:label>
    <link:label id="lab_us-gaap_OtherCommitmentsLineItems_label_en-US" xlink:label="lab_us-gaap_OtherCommitmentsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Commitments [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitmentsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherCommitmentsLineItems" xlink:to="lab_us-gaap_OtherCommitmentsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cc591-a892-7660-a975-c56dd0101053_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Stockholders' Equity [Roll Forward]</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Stockholders' Equity [Roll Forward]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:to="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_OtherFinancingLiabilities_019cc591-a891-7648-9961-47a9fd44507c_terseLabel_en-US" xlink:label="lab_onit_OtherFinancingLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MSR related financing liabilities, at fair value</link:label>
    <link:label id="lab_onit_OtherFinancingLiabilities_019cc591-a891-730d-8da6-dea1b7f25887_verboseLabel_en-US" xlink:label="lab_onit_OtherFinancingLiabilities" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other financing liabilities, at fair value</link:label>
    <link:label id="lab_onit_OtherFinancingLiabilities_label_en-US" xlink:label="lab_onit_OtherFinancingLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Financing Liabilities</link:label>
    <link:label id="lab_onit_OtherFinancingLiabilities_documentation_en-US" xlink:label="lab_onit_OtherFinancingLiabilities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other financing liabilities.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OtherFinancingLiabilities" xlink:href="onit-20260331.xsd#onit_OtherFinancingLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_OtherFinancingLiabilities" xlink:to="lab_onit_OtherFinancingLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ScheduleOfAssetsLiabilitiesandInterestExpenseTableTextBlock_019cc591-a75f-7911-bfee-09a844cfd38b_terseLabel_en-US" xlink:label="lab_onit_ScheduleOfAssetsLiabilitiesandInterestExpenseTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Assets, Liabilities Related to MSR Transfer Agreements</link:label>
    <link:label id="lab_onit_ScheduleOfAssetsLiabilitiesandInterestExpenseTableTextBlock_label_en-US" xlink:label="lab_onit_ScheduleOfAssetsLiabilitiesandInterestExpenseTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Assets Liabilities and Interest Expense [Table Text Block]</link:label>
    <link:label id="lab_onit_ScheduleOfAssetsLiabilitiesandInterestExpenseTableTextBlock_documentation_en-US" xlink:label="lab_onit_ScheduleOfAssetsLiabilitiesandInterestExpenseTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tabular disclosure of assets, liabilities and interest expense by the components of the Company's interest-bearing liabilities.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ScheduleOfAssetsLiabilitiesandInterestExpenseTableTextBlock" xlink:href="onit-20260331.xsd#onit_ScheduleOfAssetsLiabilitiesandInterestExpenseTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ScheduleOfAssetsLiabilitiesandInterestExpenseTableTextBlock" xlink:to="lab_onit_ScheduleOfAssetsLiabilitiesandInterestExpenseTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ReverseMortgagesTextBlock_019cc591-a808-711b-8acb-8414004c5f5c_terseLabel_en-US" xlink:label="lab_onit_ReverseMortgagesTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reverse Mortgages</link:label>
    <link:label id="lab_onit_ReverseMortgagesTextBlock_label_en-US" xlink:label="lab_onit_ReverseMortgagesTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reverse Mortgages [Text Block]</link:label>
    <link:label id="lab_onit_ReverseMortgagesTextBlock_documentation_en-US" xlink:label="lab_onit_ReverseMortgagesTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Reverse Mortgages</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ReverseMortgagesTextBlock" xlink:href="onit-20260331.xsd#onit_ReverseMortgagesTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ReverseMortgagesTextBlock" xlink:to="lab_onit_ReverseMortgagesTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingLiabilityAtFairValueSettlements_019dd4c4-4d98-79dc-bc75-5063d670d542_negatedTerseLabel_en-US" xlink:label="lab_onit_ServicingLiabilityAtFairValueSettlements" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">ESS settlement</link:label>
    <link:label id="lab_onit_ServicingLiabilityAtFairValueSettlements_label_en-US" xlink:label="lab_onit_ServicingLiabilityAtFairValueSettlements" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Liability, At Fair Value, Settlements</link:label>
    <link:label id="lab_onit_ServicingLiabilityAtFairValueSettlements_documentation_en-US" xlink:label="lab_onit_ServicingLiabilityAtFairValueSettlements" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing Liability, At Fair Value, Settlements</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingLiabilityAtFairValueSettlements" xlink:href="onit-20260331.xsd#onit_ServicingLiabilityAtFairValueSettlements"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingLiabilityAtFairValueSettlements" xlink:to="lab_onit_ServicingLiabilityAtFairValueSettlements" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForSalePeriodOfSale_019cc591-a808-7482-96ba-8dde88973e3c_terseLabel_en-US" xlink:label="lab_onit_LoansHeldForSalePeriodOfSale" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans held-for-sale, period of sale</link:label>
    <link:label id="lab_onit_LoansHeldForSalePeriodOfSale_label_en-US" xlink:label="lab_onit_LoansHeldForSalePeriodOfSale" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held-for-sale, Period of Sale</link:label>
    <link:label id="lab_onit_LoansHeldForSalePeriodOfSale_documentation_en-US" xlink:label="lab_onit_LoansHeldForSalePeriodOfSale" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Held-for-sale, Period of Sale</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForSalePeriodOfSale" xlink:href="onit-20260331.xsd#onit_LoansHeldForSalePeriodOfSale"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForSalePeriodOfSale" xlink:to="lab_onit_LoansHeldForSalePeriodOfSale" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_CompActuallyPaidVsTotalShareholderRtnTextBlock_terseLabel_en-US" xlink:label="lab_ecd_CompActuallyPaidVsTotalShareholderRtnTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Compensation Actually Paid vs. Total Shareholder Return</link:label>
    <link:label id="lab_ecd_CompActuallyPaidVsTotalShareholderRtnTextBlock_label_en-US" xlink:label="lab_ecd_CompActuallyPaidVsTotalShareholderRtnTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Compensation Actually Paid vs. Total Shareholder Return [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_CompActuallyPaidVsTotalShareholderRtnTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_CompActuallyPaidVsTotalShareholderRtnTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_CompActuallyPaidVsTotalShareholderRtnTextBlock" xlink:to="lab_ecd_CompActuallyPaidVsTotalShareholderRtnTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_MaximumClaimAmountGreaterThan95AndLessThan98Member_019cc591-a891-7b5c-8af1-8f2266659c68_terseLabel_en-US" xlink:label="lab_onit_MaximumClaimAmountGreaterThan95AndLessThan98Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum Claim Amount, Greater than 95% and less Than 98%</link:label>
    <link:label id="lab_onit_MaximumClaimAmountGreaterThan95AndLessThan98Member_label_en-US" xlink:label="lab_onit_MaximumClaimAmountGreaterThan95AndLessThan98Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum Claim Amount, Greater than 95% and less Than 98% [Member]</link:label>
    <link:label id="lab_onit_MaximumClaimAmountGreaterThan95AndLessThan98Member_documentation_en-US" xlink:label="lab_onit_MaximumClaimAmountGreaterThan95AndLessThan98Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Maximum Claim Amount, Greater than 95% and less Than 98%</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_MaximumClaimAmountGreaterThan95AndLessThan98Member" xlink:href="onit-20260331.xsd#onit_MaximumClaimAmountGreaterThan95AndLessThan98Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_MaximumClaimAmountGreaterThan95AndLessThan98Member" xlink:to="lab_onit_MaximumClaimAmountGreaterThan95AndLessThan98Member" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_WeightedAverageMember_019cc591-a892-7978-b0b1-8fcb800b3a1e_terseLabel_en-US" xlink:label="lab_srt_WeightedAverageMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted Average</link:label>
    <link:label id="lab_srt_WeightedAverageMember_label_en-US" xlink:label="lab_srt_WeightedAverageMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_WeightedAverageMember" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_WeightedAverageMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_WeightedAverageMember" xlink:to="lab_srt_WeightedAverageMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cc591-a891-7ef8-a3d7-fc465c70fe54_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Recurring and Nonrecurring [Table]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Recurring and Nonrecurring [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AmortizationOfIntangibleAssets_019cc591-a808-7956-8171-07e879523f47_terseLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfIntangibleAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amortization of intangibles</link:label>
    <link:label id="lab_us-gaap_AmortizationOfIntangibleAssets_label_en-US" xlink:label="lab_us-gaap_AmortizationOfIntangibleAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amortization of Intangible Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AmortizationOfIntangibleAssets" xlink:to="lab_us-gaap_AmortizationOfIntangibleAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MortgagesHeldForSaleFairValueDisclosure_019cc591-a75f-7d48-aa17-b32ef0592639_terseLabel_en-US" xlink:label="lab_us-gaap_MortgagesHeldForSaleFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mortgages Held-for-sale, Fair Value Disclosure</link:label>
    <link:label id="lab_us-gaap_MortgagesHeldForSaleFairValueDisclosure_label_en-US" xlink:label="lab_us-gaap_MortgagesHeldForSaleFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loan, Mortgage, Held-for-Sale, Fair Value Disclosure</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MortgagesHeldForSaleFairValueDisclosure" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MortgagesHeldForSaleFairValueDisclosure"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MortgagesHeldForSaleFairValueDisclosure" xlink:to="lab_us-gaap_MortgagesHeldForSaleFairValueDisclosure" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DeferredIncomeTaxAssetsNet_019cc591-a891-706a-91dd-a621d2eff46e_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxAssetsNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred tax assets, net - See Note 17</link:label>
    <link:label id="lab_us-gaap_DeferredIncomeTaxAssetsNet_label_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxAssetsNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Income Tax Assets, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredIncomeTaxAssetsNet" xlink:to="lab_us-gaap_DeferredIncomeTaxAssetsNet" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockRepurchasedDuringPeriodValue_019cc591-a808-78db-811f-c05b847771cf_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_StockRepurchasedDuringPeriodValue" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Repurchase of common stock</link:label>
    <link:label id="lab_us-gaap_StockRepurchasedDuringPeriodValue_019cc591-a808-74ae-9a24-b5f4683d0edf_terseLabel_en-US" xlink:label="lab_us-gaap_StockRepurchasedDuringPeriodValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Repurchase of common stock</link:label>
    <link:label id="lab_us-gaap_StockRepurchasedDuringPeriodValue_label_en-US" xlink:label="lab_us-gaap_StockRepurchasedDuringPeriodValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Repurchased During Period, Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockRepurchasedDuringPeriodValue" xlink:to="lab_us-gaap_StockRepurchasedDuringPeriodValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DepreciationDepletionAndAmortization_019cc591-a892-7240-97bb-144a455053ca_terseLabel_en-US" xlink:label="lab_us-gaap_DepreciationDepletionAndAmortization" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Depreciation</link:label>
    <link:label id="lab_us-gaap_DepreciationDepletionAndAmortization_label_en-US" xlink:label="lab_us-gaap_DepreciationDepletionAndAmortization" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Depreciation, Depletion and Amortization</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepreciationDepletionAndAmortization" xlink:to="lab_us-gaap_DepreciationDepletionAndAmortization" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_RepaymentOfWarehouseFinancingOfAssetsSold_019dd4f3-32c1-7724-89fb-1495c20870f3_terseLabel_en-US" xlink:label="lab_onit_RepaymentOfWarehouseFinancingOfAssetsSold" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Repayment Of Warehouse Financing Of Assets Sold</link:label>
    <link:label id="lab_onit_RepaymentOfWarehouseFinancingOfAssetsSold_label_en-US" xlink:label="lab_onit_RepaymentOfWarehouseFinancingOfAssetsSold" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repayment Of Warehouse Financing Of Assets Sold</link:label>
    <link:label id="lab_onit_RepaymentOfWarehouseFinancingOfAssetsSold_documentation_en-US" xlink:label="lab_onit_RepaymentOfWarehouseFinancingOfAssetsSold" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Repayment Of Warehouse Financing Of Assets Sold</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_RepaymentOfWarehouseFinancingOfAssetsSold" xlink:href="onit-20260331.xsd#onit_RepaymentOfWarehouseFinancingOfAssetsSold"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_RepaymentOfWarehouseFinancingOfAssetsSold" xlink:to="lab_onit_RepaymentOfWarehouseFinancingOfAssetsSold" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ResidentialMortgageBackedSecuritiesMember_019cc591-a808-79d7-a439-d0e325edd231_terseLabel_en-US" xlink:label="lab_us-gaap_ResidentialMortgageBackedSecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other residential mortgage loans (3)</link:label>
    <link:label id="lab_us-gaap_ResidentialMortgageBackedSecuritiesMember_label_en-US" xlink:label="lab_us-gaap_ResidentialMortgageBackedSecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Residential Mortgage-Backed Securities [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResidentialMortgageBackedSecuritiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember" xlink:to="lab_us-gaap_ResidentialMortgageBackedSecuritiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TrdArrDuration_terseLabel_en-US" xlink:label="lab_ecd_TrdArrDuration" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Arrangement Duration</link:label>
    <link:label id="lab_ecd_TrdArrDuration_label_en-US" xlink:label="lab_ecd_TrdArrDuration" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Arrangement Duration</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrDuration" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_TrdArrDuration"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TrdArrDuration" xlink:to="lab_ecd_TrdArrDuration" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StatementBusinessSegmentsAxis_019cc591-a75e-7cf8-a325-bad239c202a9_terseLabel_en-US" xlink:label="lab_us-gaap_StatementBusinessSegmentsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segments [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementBusinessSegmentsAxis_label_en-US" xlink:label="lab_us-gaap_StatementBusinessSegmentsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segments [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis" xlink:to="lab_us-gaap_StatementBusinessSegmentsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_RepurchasedGinnieMaeLoansMember_019cc591-a891-7f8c-992a-4bb13c41a842_terseLabel_en-US" xlink:label="lab_onit_RepurchasedGinnieMaeLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Repurchased Ginnie Mae Loans</link:label>
    <link:label id="lab_onit_RepurchasedGinnieMaeLoansMember_label_en-US" xlink:label="lab_onit_RepurchasedGinnieMaeLoansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repurchased Ginnie Mae Loans [Member]</link:label>
    <link:label id="lab_onit_RepurchasedGinnieMaeLoansMember_documentation_en-US" xlink:label="lab_onit_RepurchasedGinnieMaeLoansMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Repurchased Ginnie Mae loans.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_RepurchasedGinnieMaeLoansMember" xlink:href="onit-20260331.xsd#onit_RepurchasedGinnieMaeLoansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_RepurchasedGinnieMaeLoansMember" xlink:to="lab_onit_RepurchasedGinnieMaeLoansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_FeeandCommissionsReverseMortgageBanking_019cc591-a808-74df-b9be-76f1ec9249ec_terseLabel_en-US" xlink:label="lab_onit_FeeandCommissionsReverseMortgageBanking" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gain on reverse loans and HMBS-related borrowings, net</link:label>
    <link:label id="lab_onit_FeeandCommissionsReverseMortgageBanking_label_en-US" xlink:label="lab_onit_FeeandCommissionsReverseMortgageBanking" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fee and Commissions, Reverse Mortgage Banking</link:label>
    <link:label id="lab_onit_FeeandCommissionsReverseMortgageBanking_documentation_en-US" xlink:label="lab_onit_FeeandCommissionsReverseMortgageBanking" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fee and Commissions, Reverse Mortgage Banking</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_FeeandCommissionsReverseMortgageBanking" xlink:href="onit-20260331.xsd#onit_FeeandCommissionsReverseMortgageBanking"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_FeeandCommissionsReverseMortgageBanking" xlink:to="lab_onit_FeeandCommissionsReverseMortgageBanking" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_CarryingValueAndClassificationOfAssetsAndLiabilitiesOfAdvanceFinancingFacilitiesTableTextBlock_019cc591-a808-7096-9037-240c1fd89de6_terseLabel_en-US" xlink:label="lab_onit_CarryingValueAndClassificationOfAssetsAndLiabilitiesOfAdvanceFinancingFacilitiesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Carrying Value And Classification Of Assets And Liabilities Of Advance Financing Facilities</link:label>
    <link:label id="lab_onit_CarryingValueAndClassificationOfAssetsAndLiabilitiesOfAdvanceFinancingFacilitiesTableTextBlock_label_en-US" xlink:label="lab_onit_CarryingValueAndClassificationOfAssetsAndLiabilitiesOfAdvanceFinancingFacilitiesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Carrying Value And Classification Of Assets And Liabilities Of Advance Financing Facilities [Table Text Block]</link:label>
    <link:label id="lab_onit_CarryingValueAndClassificationOfAssetsAndLiabilitiesOfAdvanceFinancingFacilitiesTableTextBlock_documentation_en-US" xlink:label="lab_onit_CarryingValueAndClassificationOfAssetsAndLiabilitiesOfAdvanceFinancingFacilitiesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Carrying value and classification of assets and liabilities of advance financing facilities.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_CarryingValueAndClassificationOfAssetsAndLiabilitiesOfAdvanceFinancingFacilitiesTableTextBlock" xlink:href="onit-20260331.xsd#onit_CarryingValueAndClassificationOfAssetsAndLiabilitiesOfAdvanceFinancingFacilitiesTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_CarryingValueAndClassificationOfAssetsAndLiabilitiesOfAdvanceFinancingFacilitiesTableTextBlock" xlink:to="lab_onit_CarryingValueAndClassificationOfAssetsAndLiabilitiesOfAdvanceFinancingFacilitiesTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeOtherNetOfTax_019cc591-a75f-7709-8f5f-e99088e6b486_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeOtherNetOfTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive income (loss), net of income taxes</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeOtherNetOfTax_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeOtherNetOfTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income, Other, Net of Tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeOtherNetOfTax" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeOtherNetOfTax"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeOtherNetOfTax" xlink:to="lab_us-gaap_OtherComprehensiveIncomeOtherNetOfTax" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019cc591-a808-7ee3-a73e-0639a043088c_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value by Liability Class [Domain]</link:label>
    <link:label id="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_label_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value by Liability Class [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:to="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_LocalPhoneNumber_019cc591-a891-7508-9572-e09ea9daac7e_terseLabel_en-US" xlink:label="lab_dei_LocalPhoneNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Local Phone Number</link:label>
    <link:label id="lab_dei_LocalPhoneNumber_label_en-US" xlink:label="lab_dei_LocalPhoneNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Local Phone Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LocalPhoneNumber" xlink:to="lab_dei_LocalPhoneNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_Additional402vDisclosureTextBlock_terseLabel_en-US" xlink:label="lab_ecd_Additional402vDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Additional 402(v) Disclosure</link:label>
    <link:label id="lab_ecd_Additional402vDisclosureTextBlock_label_en-US" xlink:label="lab_ecd_Additional402vDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Additional 402(v) Disclosure [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_Additional402vDisclosureTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_Additional402vDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_Additional402vDisclosureTextBlock" xlink:to="lab_ecd_Additional402vDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherOperatingActivitiesCashFlowStatement_019cc591-a808-728b-b895-643e45562760_terseLabel_en-US" xlink:label="lab_us-gaap_OtherOperatingActivitiesCashFlowStatement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other, net</link:label>
    <link:label id="lab_us-gaap_OtherOperatingActivitiesCashFlowStatement_label_en-US" xlink:label="lab_us-gaap_OtherOperatingActivitiesCashFlowStatement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingActivitiesCashFlowStatement" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherOperatingActivitiesCashFlowStatement"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherOperatingActivitiesCashFlowStatement" xlink:to="lab_us-gaap_OtherOperatingActivitiesCashFlowStatement" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AssetsAbstract_019cc591-a808-7614-85b4-50c8ff9cb96f_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets</link:label>
    <link:label id="lab_us-gaap_AssetsAbstract_label_en-US" xlink:label="lab_us-gaap_AssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="lab_us-gaap_AssetsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CreditFacilityAxis_019cc591-a891-7771-a065-9e2a9dbe05b4_terseLabel_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit Facility [Axis]</link:label>
    <link:label id="lab_us-gaap_CreditFacilityAxis_label_en-US" xlink:label="lab_us-gaap_CreditFacilityAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Credit Facility [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CreditFacilityAxis" xlink:to="lab_us-gaap_CreditFacilityAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_UndrlygSecurityMktPriceChngPct_terseLabel_en-US" xlink:label="lab_ecd_UndrlygSecurityMktPriceChngPct" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Underlying Security Market Price Change</link:label>
    <link:label id="lab_ecd_UndrlygSecurityMktPriceChngPct_label_en-US" xlink:label="lab_ecd_UndrlygSecurityMktPriceChngPct" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Underlying Security Market Price Change, Percent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_UndrlygSecurityMktPriceChngPct" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_UndrlygSecurityMktPriceChngPct"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_UndrlygSecurityMktPriceChngPct" xlink:to="lab_ecd_UndrlygSecurityMktPriceChngPct" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AveragePeriodtoSecuritization_019cc591-a75e-790d-a1dc-11943ae9ca5e_terseLabel_en-US" xlink:label="lab_onit_AveragePeriodtoSecuritization" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Average period to securitization</link:label>
    <link:label id="lab_onit_AveragePeriodtoSecuritization_label_en-US" xlink:label="lab_onit_AveragePeriodtoSecuritization" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Average Period to Securitization</link:label>
    <link:label id="lab_onit_AveragePeriodtoSecuritization_documentation_en-US" xlink:label="lab_onit_AveragePeriodtoSecuritization" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Time period in which securitization takes place after loan closing or purchase.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AveragePeriodtoSecuritization" xlink:href="onit-20260331.xsd#onit_AveragePeriodtoSecuritization"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AveragePeriodtoSecuritization" xlink:to="lab_onit_AveragePeriodtoSecuritization" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_GainOnLoansHeldForSaleTableTextBlock_019cc591-a808-7da3-8130-8ae3d508567f_terseLabel_en-US" xlink:label="lab_onit_GainOnLoansHeldForSaleTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Gains on Loans Held for Sale, Net</link:label>
    <link:label id="lab_onit_GainOnLoansHeldForSaleTableTextBlock_label_en-US" xlink:label="lab_onit_GainOnLoansHeldForSaleTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain On Loans Held For Sale [Table Text Block]</link:label>
    <link:label id="lab_onit_GainOnLoansHeldForSaleTableTextBlock_documentation_en-US" xlink:label="lab_onit_GainOnLoansHeldForSaleTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Gain On Loans Held For Sale [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_GainOnLoansHeldForSaleTableTextBlock" xlink:href="onit-20260331.xsd#onit_GainOnLoansHeldForSaleTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_GainOnLoansHeldForSaleTableTextBlock" xlink:to="lab_onit_GainOnLoansHeldForSaleTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesOther_019cc591-a891-7736-807f-facaa97faa49_negatedTerseLabel_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesOther" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesOther_label_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesOther" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Investment, Reverse Mortgages, Other</link:label>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesOther_documentation_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesOther" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Held For Investment, Reverse Mortgages, Other</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForInvestmentReverseMortgagesOther" xlink:href="onit-20260331.xsd#onit_LoansHeldForInvestmentReverseMortgagesOther"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForInvestmentReverseMortgagesOther" xlink:to="lab_onit_LoansHeldForInvestmentReverseMortgagesOther" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentAxis_019cc591-a75f-79f5-adc9-b1dbefd20165_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument [Axis]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentAxis_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentAxis" xlink:to="lab_us-gaap_DebtInstrumentAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_OcwenMasterAdvanceReceivablesTrustMember_019cc591-a891-752a-915d-e516b75e869a_terseLabel_en-US" xlink:label="lab_onit_OcwenMasterAdvanceReceivablesTrustMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Ocwen Master Advance Receivables Trust (OMART)</link:label>
    <link:label id="lab_onit_OcwenMasterAdvanceReceivablesTrustMember_label_en-US" xlink:label="lab_onit_OcwenMasterAdvanceReceivablesTrustMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ocwen Master Advance Receivables Trust [Member]</link:label>
    <link:label id="lab_onit_OcwenMasterAdvanceReceivablesTrustMember_documentation_en-US" xlink:label="lab_onit_OcwenMasterAdvanceReceivablesTrustMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ocwen master advance receivables trust.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OcwenMasterAdvanceReceivablesTrustMember" xlink:href="onit-20260331.xsd#onit_OcwenMasterAdvanceReceivablesTrustMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_OcwenMasterAdvanceReceivablesTrustMember" xlink:to="lab_onit_OcwenMasterAdvanceReceivablesTrustMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueDisclosuresTextBlock_019cc591-a891-79fe-adfb-22c04bd8079d_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value</link:label>
    <link:label id="lab_us-gaap_FairValueDisclosuresTextBlock_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Disclosures [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosuresTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosuresTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosuresTextBlock" xlink:to="lab_us-gaap_FairValueDisclosuresTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_GSELoansMember_019cc591-a892-74f3-9cad-dd85db07f6d2_terseLabel_en-US" xlink:label="lab_onit_GSELoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">GSE loans</link:label>
    <link:label id="lab_onit_GSELoansMember_label_en-US" xlink:label="lab_onit_GSELoansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">GSE Loans [Member]</link:label>
    <link:label id="lab_onit_GSELoansMember_documentation_en-US" xlink:label="lab_onit_GSELoansMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">GSE Loans [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_GSELoansMember" xlink:href="onit-20260331.xsd#onit_GSELoansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_GSELoansMember" xlink:to="lab_onit_GSELoansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CreditFacilityDomain_019cc591-a808-7819-ae1f-da85625c0801_terseLabel_en-US" xlink:label="lab_us-gaap_CreditFacilityDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit Facility [Domain]</link:label>
    <link:label id="lab_us-gaap_CreditFacilityDomain_label_en-US" xlink:label="lab_us-gaap_CreditFacilityDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Credit Facility [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CreditFacilityDomain" xlink:to="lab_us-gaap_CreditFacilityDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockholdersEquityAbstract_019cc591-a891-74da-9338-21089f6b4c04_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stockholders&#8217; Equity</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityAbstract_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity, Attributable to Parent [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityAbstract" xlink:to="lab_us-gaap_StockholdersEquityAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeLiabilitiesCurrent_019cc591-a75e-7da4-8816-e1d082e9da35_verboseLabel_en-US" xlink:label="lab_us-gaap_DerivativeLiabilitiesCurrent" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Derivatives, at fair value - See Note 15</link:label>
    <link:label id="lab_us-gaap_DerivativeLiabilitiesCurrent_label_en-US" xlink:label="lab_us-gaap_DerivativeLiabilitiesCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Liability, Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilitiesCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeLiabilitiesCurrent" xlink:to="lab_us-gaap_DerivativeLiabilitiesCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToRealEstateOwned_019dd988-0276-75ed-91e5-6b4d44d7ffd8_terseLabel_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToRealEstateOwned" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">REO (Other assets)</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToRealEstateOwned_label_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToRealEstateOwned" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Transfers To Real Estate Owned</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToRealEstateOwned_documentation_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToRealEstateOwned" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Transfers To Real Estate Owned</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForSaleReverseMortgagesTransfersToRealEstateOwned" xlink:href="onit-20260331.xsd#onit_LoansHeldForSaleReverseMortgagesTransfersToRealEstateOwned"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForSaleReverseMortgagesTransfersToRealEstateOwned" xlink:to="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToRealEstateOwned" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_GainLossOnSecuritizationOfFinancialAssets_019cc591-a808-7eaf-913a-747f7e653bdb_terseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSecuritizationOfFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gain on new originations</link:label>
    <link:label id="lab_us-gaap_GainLossOnSecuritizationOfFinancialAssets_label_en-US" xlink:label="lab_us-gaap_GainLossOnSecuritizationOfFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Securitization of Financial Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSecuritizationOfFinancialAssets" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnSecuritizationOfFinancialAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnSecuritizationOfFinancialAssets" xlink:to="lab_us-gaap_GainLossOnSecuritizationOfFinancialAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_019cc591-a891-7f0e-a7b0-0387e15b43ad_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate (as a percent)</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Interest Rate, Stated Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cc591-a891-7911-9c74-edaf32761853_terseLabel_en-US" xlink:label="lab_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment, Name [Axis]</link:label>
    <link:label id="lab_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_label_en-US" xlink:label="lab_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Name [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:to="lab_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FinancingReceivables30To59DaysPastDueMember_019cc591-a75e-7ca3-8812-b11c9e58f775_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivables30To59DaysPastDueMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Asset, 30 to 59 Days Past Due [Member]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivables30To59DaysPastDueMember_label_en-US" xlink:label="lab_us-gaap_FinancingReceivables30To59DaysPastDueMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Asset, 30 to 59 Days Past Due [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivables30To59DaysPastDueMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivables30To59DaysPastDueMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivables30To59DaysPastDueMember" xlink:to="lab_us-gaap_FinancingReceivables30To59DaysPastDueMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityRegistrantName_019cc591-a808-7d77-9934-c6da96e9f240_terseLabel_en-US" xlink:label="lab_dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:label id="lab_dei_EntityRegistrantName_label_en-US" xlink:label="lab_dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityRegistrantName" xlink:to="lab_dei_EntityRegistrantName" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerTransfersToOtherAssets_019cc591-a808-7615-8bff-46e70f3235bb_negatedTerseLabel_en-US" xlink:label="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerTransfersToOtherAssets" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Advances Payments On Behalf Of Borrower Transfers To Other Assets</link:label>
    <link:label id="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerTransfersToOtherAssets_label_en-US" xlink:label="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerTransfersToOtherAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advances Payments On Behalf Of Borrower Transfers To Other Assets</link:label>
    <link:label id="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerTransfersToOtherAssets_documentation_en-US" xlink:label="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerTransfersToOtherAssets" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Advances payments on behalf of borrower transfers to other assets.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AdvancesPaymentsOnBehalfOfBorrowerTransfersToOtherAssets" xlink:href="onit-20260331.xsd#onit_AdvancesPaymentsOnBehalfOfBorrowerTransfersToOtherAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AdvancesPaymentsOnBehalfOfBorrowerTransfersToOtherAssets" xlink:to="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerTransfersToOtherAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ScheduleOfServicingAndSubservicingFeesTableTextBlock_019cc591-a891-74d4-b9eb-7149856cb4db_terseLabel_en-US" xlink:label="lab_onit_ScheduleOfServicingAndSubservicingFeesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Components of Servicing and Subservicing Fees</link:label>
    <link:label id="lab_onit_ScheduleOfServicingAndSubservicingFeesTableTextBlock_label_en-US" xlink:label="lab_onit_ScheduleOfServicingAndSubservicingFeesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Servicing and Subservicing Fees [Table Text Block]</link:label>
    <link:label id="lab_onit_ScheduleOfServicingAndSubservicingFeesTableTextBlock_documentation_en-US" xlink:label="lab_onit_ScheduleOfServicingAndSubservicingFeesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tabular disclosure of fees generated during the reporting period for servicing subservicing of assets.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ScheduleOfServicingAndSubservicingFeesTableTextBlock" xlink:href="onit-20260331.xsd#onit_ScheduleOfServicingAndSubservicingFeesTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ScheduleOfServicingAndSubservicingFeesTableTextBlock" xlink:to="lab_onit_ScheduleOfServicingAndSubservicingFeesTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ChangeInFairValueOfMortgageLoansHeldForSale_019cc591-a808-7b78-bd82-166912b2ee59_terseLabel_en-US" xlink:label="lab_onit_ChangeInFairValueOfMortgageLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in fair value of loans held for sale</link:label>
    <link:label id="lab_onit_ChangeInFairValueOfMortgageLoansHeldForSale_label_en-US" xlink:label="lab_onit_ChangeInFairValueOfMortgageLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Change In Fair Value Of Mortgage Loans Held For Sale</link:label>
    <link:label id="lab_onit_ChangeInFairValueOfMortgageLoansHeldForSale_documentation_en-US" xlink:label="lab_onit_ChangeInFairValueOfMortgageLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The increase (decrease) during the reporting period in the fair value of mortgage loans that are held with the intention to sell or be securitized in the near future.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ChangeInFairValueOfMortgageLoansHeldForSale" xlink:href="onit-20260331.xsd#onit_ChangeInFairValueOfMortgageLoansHeldForSale"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ChangeInFairValueOfMortgageLoansHeldForSale" xlink:to="lab_onit_ChangeInFairValueOfMortgageLoansHeldForSale" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FinancingInterestExpense_019cc591-a75e-7b27-9a20-459b243c4851_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_FinancingInterestExpense" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Pledged MSR liability expense</link:label>
    <link:label id="lab_us-gaap_FinancingInterestExpense_019cc591-a75e-7dc1-a502-690794165bc7_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingInterestExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MSR Pledged liability expense</link:label>
    <link:label id="lab_us-gaap_FinancingInterestExpense_label_en-US" xlink:label="lab_us-gaap_FinancingInterestExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Interest Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingInterestExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingInterestExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingInterestExpense" xlink:to="lab_us-gaap_FinancingInterestExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TemporaryEquitySharesOutstanding_019cc591-a808-70e1-9d47-e0a0d56e4a05_terseLabel_en-US" xlink:label="lab_us-gaap_TemporaryEquitySharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Temporary Equity, Shares Outstanding</link:label>
    <link:label id="lab_us-gaap_TemporaryEquitySharesOutstanding_label_en-US" xlink:label="lab_us-gaap_TemporaryEquitySharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Temporary Equity, Shares Outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquitySharesOutstanding" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquitySharesOutstanding"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TemporaryEquitySharesOutstanding" xlink:to="lab_us-gaap_TemporaryEquitySharesOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_StkPrcOrTsrEstimationMethodTextBlock_terseLabel_en-US" xlink:label="lab_ecd_StkPrcOrTsrEstimationMethodTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock Price or TSR Estimation Method</link:label>
    <link:label id="lab_ecd_StkPrcOrTsrEstimationMethodTextBlock_label_en-US" xlink:label="lab_ecd_StkPrcOrTsrEstimationMethodTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Price or TSR Estimation Method [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_StkPrcOrTsrEstimationMethodTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_StkPrcOrTsrEstimationMethodTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_StkPrcOrTsrEstimationMethodTextBlock" xlink:to="lab_ecd_StkPrcOrTsrEstimationMethodTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_OtherReceivablesAllowanceForLosses_019cc591-a891-7da5-966c-30078dae9805_negatedTerseLabel_en-US" xlink:label="lab_onit_OtherReceivablesAllowanceForLosses" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Allowance for losses</link:label>
    <link:label id="lab_onit_OtherReceivablesAllowanceForLosses_label_en-US" xlink:label="lab_onit_OtherReceivablesAllowanceForLosses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Receivables, Allowance For Losses</link:label>
    <link:label id="lab_onit_OtherReceivablesAllowanceForLosses_documentation_en-US" xlink:label="lab_onit_OtherReceivablesAllowanceForLosses" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Receivables, Allowance For Losses</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OtherReceivablesAllowanceForLosses" xlink:href="onit-20260331.xsd#onit_OtherReceivablesAllowanceForLosses"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_OtherReceivablesAllowanceForLosses" xlink:to="lab_onit_OtherReceivablesAllowanceForLosses" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingReceivableDueFromCustodialAccounts_019cc591-a891-7770-bd4c-0a51d4d37789_terseLabel_en-US" xlink:label="lab_onit_ServicingReceivableDueFromCustodialAccounts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Due from custodial accounts</link:label>
    <link:label id="lab_onit_ServicingReceivableDueFromCustodialAccounts_label_en-US" xlink:label="lab_onit_ServicingReceivableDueFromCustodialAccounts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Receivable, Due From Custodial Accounts</link:label>
    <link:label id="lab_onit_ServicingReceivableDueFromCustodialAccounts_documentation_en-US" xlink:label="lab_onit_ServicingReceivableDueFromCustodialAccounts" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing Receivable, Due From Custodial Accounts</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingReceivableDueFromCustodialAccounts" xlink:href="onit-20260331.xsd#onit_ServicingReceivableDueFromCustodialAccounts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingReceivableDueFromCustodialAccounts" xlink:to="lab_onit_ServicingReceivableDueFromCustodialAccounts" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_FairValueGNMAMortgageServicingRightsMember_019cc591-a891-7a9f-9eb3-15e9086de8a0_terseLabel_en-US" xlink:label="lab_onit_FairValueGNMAMortgageServicingRightsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value GNMA Mortgage Servicing Rights</link:label>
    <link:label id="lab_onit_FairValueGNMAMortgageServicingRightsMember_label_en-US" xlink:label="lab_onit_FairValueGNMAMortgageServicingRightsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value GNMA Mortgage Servicing Rights [Member]</link:label>
    <link:label id="lab_onit_FairValueGNMAMortgageServicingRightsMember_documentation_en-US" xlink:label="lab_onit_FairValueGNMAMortgageServicingRightsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fair Value GNMA Mortgage Servicing Rights</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_FairValueGNMAMortgageServicingRightsMember" xlink:href="onit-20260331.xsd#onit_FairValueGNMAMortgageServicingRightsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_FairValueGNMAMortgageServicingRightsMember" xlink:to="lab_onit_FairValueGNMAMortgageServicingRightsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AlternativeInvestmentMeasurementInput_019cc591-a891-7d33-b8c7-144b09159eec_terseLabel_en-US" xlink:label="lab_us-gaap_AlternativeInvestmentMeasurementInput" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Measurement input</link:label>
    <link:label id="lab_us-gaap_AlternativeInvestmentMeasurementInput_label_en-US" xlink:label="lab_us-gaap_AlternativeInvestmentMeasurementInput" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Alternative Investment, Measurement Input</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AlternativeInvestmentMeasurementInput" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AlternativeInvestmentMeasurementInput"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AlternativeInvestmentMeasurementInput" xlink:to="lab_us-gaap_AlternativeInvestmentMeasurementInput" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTextBlock_019cc591-a808-79c1-be99-3d1b78fd10c4_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Banking Regulation, Mortgage Banking, Capital Requirement</link:label>
    <link:label id="lab_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Banking Regulation, Mortgage Banking, Capital Requirement [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTextBlock" xlink:to="lab_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsForMortgageCompaniesTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerNetOfValuationAllowance_019cc591-a808-7ccd-ae98-c5f8d0672f5d_totalLabel_en-US" xlink:label="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerNetOfValuationAllowance" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Advances, net (2)</link:label>
    <link:label id="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerNetOfValuationAllowance_label_en-US" xlink:label="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerNetOfValuationAllowance" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advances Payments On Behalf Of Borrower Net Of Valuation Allowance</link:label>
    <link:label id="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerNetOfValuationAllowance_documentation_en-US" xlink:label="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerNetOfValuationAllowance" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total advance payments net of valuation allowance made by financial institutions on behalf of borrowers in a servicing relationship.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AdvancesPaymentsOnBehalfOfBorrowerNetOfValuationAllowance" xlink:href="onit-20260331.xsd#onit_AdvancesPaymentsOnBehalfOfBorrowerNetOfValuationAllowance"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AdvancesPaymentsOnBehalfOfBorrowerNetOfValuationAllowance" xlink:to="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerNetOfValuationAllowance" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_SeriesTwoThousandTwentyFiveVariableFundingNotesMember_019cc591-a808-7d32-a890-88aedbe273ac_terseLabel_en-US" xlink:label="lab_onit_SeriesTwoThousandTwentyFiveVariableFundingNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Series Two Thousand Twenty Five Variable Funding Notes</link:label>
    <link:label id="lab_onit_SeriesTwoThousandTwentyFiveVariableFundingNotesMember_label_en-US" xlink:label="lab_onit_SeriesTwoThousandTwentyFiveVariableFundingNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Series Two Thousand Twenty Five Variable Funding Notes [Member]</link:label>
    <link:label id="lab_onit_SeriesTwoThousandTwentyFiveVariableFundingNotesMember_documentation_en-US" xlink:label="lab_onit_SeriesTwoThousandTwentyFiveVariableFundingNotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Series Two Thousand Twenty Five Variable Funding Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_SeriesTwoThousandTwentyFiveVariableFundingNotesMember" xlink:href="onit-20260331.xsd#onit_SeriesTwoThousandTwentyFiveVariableFundingNotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_SeriesTwoThousandTwentyFiveVariableFundingNotesMember" xlink:to="lab_onit_SeriesTwoThousandTwentyFiveVariableFundingNotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ThresholdPercentageOfOutstandingPrincipalBalanceOnMaximumClaimAmount_019cc591-a891-7394-b375-3380eec61ebc_terseLabel_en-US" xlink:label="lab_onit_ThresholdPercentageOfOutstandingPrincipalBalanceOnMaximumClaimAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Threshold of outstanding principal balance on maximum claim amount (as a percent)</link:label>
    <link:label id="lab_onit_ThresholdPercentageOfOutstandingPrincipalBalanceOnMaximumClaimAmount_label_en-US" xlink:label="lab_onit_ThresholdPercentageOfOutstandingPrincipalBalanceOnMaximumClaimAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Threshold Percentage Of Outstanding Principal Balance On Maximum Claim Amount</link:label>
    <link:label id="lab_onit_ThresholdPercentageOfOutstandingPrincipalBalanceOnMaximumClaimAmount_documentation_en-US" xlink:label="lab_onit_ThresholdPercentageOfOutstandingPrincipalBalanceOnMaximumClaimAmount" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Threshold percentage of outstanding principal balance on maximum claim amount.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ThresholdPercentageOfOutstandingPrincipalBalanceOnMaximumClaimAmount" xlink:href="onit-20260331.xsd#onit_ThresholdPercentageOfOutstandingPrincipalBalanceOnMaximumClaimAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ThresholdPercentageOfOutstandingPrincipalBalanceOnMaximumClaimAmount" xlink:to="lab_onit_ThresholdPercentageOfOutstandingPrincipalBalanceOnMaximumClaimAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_019cc591-a808-7ecf-9793-a91b8010fac0_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodTwoMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Before March 15, 2025</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_019cc591-a808-74ab-b056-203275a055b5_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodTwoMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Redemption period two</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodTwoMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period Two [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodTwoMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodTwoMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AdvancesPaymentsonBehalfofBorrowerSales_019cc591-a891-751d-afd9-39a4e149b0bb_negatedLabel_en-US" xlink:label="lab_onit_AdvancesPaymentsonBehalfofBorrowerSales" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Sales of advances</link:label>
    <link:label id="lab_onit_AdvancesPaymentsonBehalfofBorrowerSales_label_en-US" xlink:label="lab_onit_AdvancesPaymentsonBehalfofBorrowerSales" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advances Payments on Behalf of Borrower, Sales</link:label>
    <link:label id="lab_onit_AdvancesPaymentsonBehalfofBorrowerSales_documentation_en-US" xlink:label="lab_onit_AdvancesPaymentsonBehalfofBorrowerSales" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Advances Payments on Behalf of Borrower, Sales</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AdvancesPaymentsonBehalfofBorrowerSales" xlink:href="onit-20260331.xsd#onit_AdvancesPaymentsonBehalfofBorrowerSales"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AdvancesPaymentsonBehalfofBorrowerSales" xlink:to="lab_onit_AdvancesPaymentsonBehalfofBorrowerSales" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AssetsServiced_019cc591-a75e-74eb-ac75-6f30996f0b72_terseLabel_en-US" xlink:label="lab_onit_AssetsServiced" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets serviced</link:label>
    <link:label id="lab_onit_AssetsServiced_label_en-US" xlink:label="lab_onit_AssetsServiced" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets Serviced</link:label>
    <link:label id="lab_onit_AssetsServiced_documentation_en-US" xlink:label="lab_onit_AssetsServiced" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total of property assets serviced as measured by UPB.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AssetsServiced" xlink:href="onit-20260331.xsd#onit_AssetsServiced"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AssetsServiced" xlink:to="lab_onit_AssetsServiced" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AdvancesOnBehalfofBorrowersTable_019cc591-a75e-77f0-9509-60599f3a7618_terseLabel_en-US" xlink:label="lab_onit_AdvancesOnBehalfofBorrowersTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advances On Behalf of Borrowers [Table]</link:label>
    <link:label id="lab_onit_AdvancesOnBehalfofBorrowersTable_label_en-US" xlink:label="lab_onit_AdvancesOnBehalfofBorrowersTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advances On Behalf of Borrowers [Table]</link:label>
    <link:label id="lab_onit_AdvancesOnBehalfofBorrowersTable_documentation_en-US" xlink:label="lab_onit_AdvancesOnBehalfofBorrowersTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Advances On Behalf of Borrowers [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AdvancesOnBehalfofBorrowersTable" xlink:href="onit-20260331.xsd#onit_AdvancesOnBehalfofBorrowersTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AdvancesOnBehalfofBorrowersTable" xlink:to="lab_onit_AdvancesOnBehalfofBorrowersTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueAmount_019cc591-a75f-758a-8c1b-b3223a4182a7_verboseLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueAmount" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">MSRs</link:label>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueAmount_019cc591-a75f-7d47-b3ef-b4fe42d17207_periodStartLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueAmount" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance</link:label>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueAmount_019cc591-a75f-70e6-a106-772a74b27411_periodEndLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueAmount" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance</link:label>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueAmount_019cc591-a75f-72e7-8fc0-f01e7cd9a19c_terseLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MSRs, at fair value</link:label>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueAmount_label_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset at Fair Value, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingAssetAtFairValueAmount" xlink:to="lab_us-gaap_ServicingAssetAtFairValueAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_TransferOfPortfolioLoansToReceivables_019cc591-a891-7ce3-ad62-deb8b5bdfd0a_negatedTerseLabel_en-US" xlink:label="lab_onit_TransferOfPortfolioLoansToReceivables" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Receivables</link:label>
    <link:label id="lab_onit_TransferOfPortfolioLoansToReceivables_label_en-US" xlink:label="lab_onit_TransferOfPortfolioLoansToReceivables" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Transfer Of Portfolio Loans To Receivables</link:label>
    <link:label id="lab_onit_TransferOfPortfolioLoansToReceivables_documentation_en-US" xlink:label="lab_onit_TransferOfPortfolioLoansToReceivables" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Value of loans held for sale at fair value in the entity's portfolio transferred to receivables in non-cash transactions.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_TransferOfPortfolioLoansToReceivables" xlink:href="onit-20260331.xsd#onit_TransferOfPortfolioLoansToReceivables"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_TransferOfPortfolioLoansToReceivables" xlink:to="lab_onit_TransferOfPortfolioLoansToReceivables" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_RestatementDateAxis_terseLabel_en-US" xlink:label="lab_ecd_RestatementDateAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restatement Determination Date:</link:label>
    <link:label id="lab_ecd_RestatementDateAxis_label_en-US" xlink:label="lab_ecd_RestatementDateAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restatement Determination Date [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_RestatementDateAxis" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_RestatementDateAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_RestatementDateAxis" xlink:to="lab_ecd_RestatementDateAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AdditionalBorrowingCapacityToBorrowers_019cc591-a75e-7e1d-8960-508f6ebc3554_terseLabel_en-US" xlink:label="lab_onit_AdditionalBorrowingCapacityToBorrowers" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Additional borrowing capacity to borrowers</link:label>
    <link:label id="lab_onit_AdditionalBorrowingCapacityToBorrowers_label_en-US" xlink:label="lab_onit_AdditionalBorrowingCapacityToBorrowers" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Additional Borrowing Capacity To Borrowers</link:label>
    <link:label id="lab_onit_AdditionalBorrowingCapacityToBorrowers_documentation_en-US" xlink:label="lab_onit_AdditionalBorrowingCapacityToBorrowers" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Additional borrowing capacity to borrowers.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AdditionalBorrowingCapacityToBorrowers" xlink:href="onit-20260331.xsd#onit_AdditionalBorrowingCapacityToBorrowers"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AdditionalBorrowingCapacityToBorrowers" xlink:to="lab_onit_AdditionalBorrowingCapacityToBorrowers" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_019cc591-a891-74a9-ae40-3c7bb20c656d_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity-based compensation and other</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RepaymentsOfOtherDebt_019cc591-a808-7007-a9e6-02feb1d77d34_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfOtherDebt" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Repayment of HMBS-related borrowings</link:label>
    <link:label id="lab_us-gaap_RepaymentsOfOtherDebt_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfOtherDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repayments of Other Debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfOtherDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfOtherDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RepaymentsOfOtherDebt" xlink:to="lab_us-gaap_RepaymentsOfOtherDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TrdArrIndName_terseLabel_en-US" xlink:label="lab_ecd_TrdArrIndName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Name</link:label>
    <link:label id="lab_ecd_TrdArrIndName_label_en-US" xlink:label="lab_ecd_TrdArrIndName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Arrangement, Individual Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrIndName" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_TrdArrIndName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TrdArrIndName" xlink:to="lab_ecd_TrdArrIndName" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LoansHeldForSaleFairValueDisclosure_019cc591-a808-7ec5-a664-17f6458b136e_verboseLabel_en-US" xlink:label="lab_us-gaap_LoansHeldForSaleFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Loans held for sale, at fair value</link:label>
    <link:label id="lab_us-gaap_LoansHeldForSaleFairValueDisclosure_019cc591-a808-743f-bb79-53e1d5dc3bab_periodStartLabel_en-US" xlink:label="lab_us-gaap_LoansHeldForSaleFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance</link:label>
    <link:label id="lab_us-gaap_LoansHeldForSaleFairValueDisclosure_019cc591-a808-76a8-8adb-2503950e9f1f_periodEndLabel_en-US" xlink:label="lab_us-gaap_LoansHeldForSaleFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance</link:label>
    <link:label id="lab_us-gaap_LoansHeldForSaleFairValueDisclosure_019cc591-a808-7ba6-bfc6-7ec3c2c67fc5_terseLabel_en-US" xlink:label="lab_us-gaap_LoansHeldForSaleFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans Held-for-sale, Fair Value Disclosure</link:label>
    <link:label id="lab_us-gaap_LoansHeldForSaleFairValueDisclosure_label_en-US" xlink:label="lab_us-gaap_LoansHeldForSaleFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loan, Held-for-Sale, Fair Value Disclosure</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansHeldForSaleFairValueDisclosure" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansHeldForSaleFairValueDisclosure"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansHeldForSaleFairValueDisclosure" xlink:to="lab_us-gaap_LoansHeldForSaleFairValueDisclosure" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_019cc591-a808-73aa-a328-c9f854c52fa4_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt instrument, face amount</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Face Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentFaceAmount" xlink:to="lab_us-gaap_DebtInstrumentFaceAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_PremiumDiscountBalanceOnLoansHeldForSale_019cc591-a808-77b8-85ff-05e0565aa391_terseLabel_en-US" xlink:label="lab_onit_PremiumDiscountBalanceOnLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Premium (discount) balance on loans held for sale</link:label>
    <link:label id="lab_onit_PremiumDiscountBalanceOnLoansHeldForSale_label_en-US" xlink:label="lab_onit_PremiumDiscountBalanceOnLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Premium (discount) balance on loans held for sale</link:label>
    <link:label id="lab_onit_PremiumDiscountBalanceOnLoansHeldForSale_documentation_en-US" xlink:label="lab_onit_PremiumDiscountBalanceOnLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Premium (discount) balance on loans held for sale</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_PremiumDiscountBalanceOnLoansHeldForSale" xlink:href="onit-20260331.xsd#onit_PremiumDiscountBalanceOnLoansHeldForSale"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_PremiumDiscountBalanceOnLoansHeldForSale" xlink:to="lab_onit_PremiumDiscountBalanceOnLoansHeldForSale" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_019cc591-a808-7a3e-9680-08468cf1b1c2_terseLabel_en-US" xlink:label="lab_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement of Comprehensive Income [Abstract]</link:label>
    <link:label id="lab_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_label_en-US" xlink:label="lab_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Comprehensive Income [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:to="lab_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_TwoThousandSeventeenAgreementsandNewRMSRAgreementsMember_019cc591-a808-7c8c-abdb-c767c31cdedb_terseLabel_en-US" xlink:label="lab_onit_TwoThousandSeventeenAgreementsandNewRMSRAgreementsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2017 Agreements and New RMSR Agreements</link:label>
    <link:label id="lab_onit_TwoThousandSeventeenAgreementsandNewRMSRAgreementsMember_label_en-US" xlink:label="lab_onit_TwoThousandSeventeenAgreementsandNewRMSRAgreementsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Two Thousand Seventeen Agreements and New RMSR Agreements [Member]</link:label>
    <link:label id="lab_onit_TwoThousandSeventeenAgreementsandNewRMSRAgreementsMember_documentation_en-US" xlink:label="lab_onit_TwoThousandSeventeenAgreementsandNewRMSRAgreementsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">2017 agreements and new RMSR agreements.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_TwoThousandSeventeenAgreementsandNewRMSRAgreementsMember" xlink:href="onit-20260331.xsd#onit_TwoThousandSeventeenAgreementsandNewRMSRAgreementsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_TwoThousandSeventeenAgreementsandNewRMSRAgreementsMember" xlink:to="lab_onit_TwoThousandSeventeenAgreementsandNewRMSRAgreementsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingReceivableOther_019cc591-a891-7a81-a311-9a9cb93107f2_terseLabel_en-US" xlink:label="lab_onit_ServicingReceivableOther" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_onit_ServicingReceivableOther_label_en-US" xlink:label="lab_onit_ServicingReceivableOther" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Receivable, Other</link:label>
    <link:label id="lab_onit_ServicingReceivableOther_documentation_en-US" xlink:label="lab_onit_ServicingReceivableOther" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing Receivable, Other</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingReceivableOther" xlink:href="onit-20260331.xsd#onit_ServicingReceivableOther"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingReceivableOther" xlink:to="lab_onit_ServicingReceivableOther" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingAndSubservicingFeesTransferredMSR_019cc591-a808-73ef-8d81-15fcd79ffa85_terseLabel_en-US" xlink:label="lab_onit_ServicingAndSubservicingFeesTransferredMSR" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing and Subservicing Fees, Transferred MSR</link:label>
    <link:label id="lab_onit_ServicingAndSubservicingFeesTransferredMSR_label_en-US" xlink:label="lab_onit_ServicingAndSubservicingFeesTransferredMSR" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing and Subservicing Fees, Transferred MSR</link:label>
    <link:label id="lab_onit_ServicingAndSubservicingFeesTransferredMSR_documentation_en-US" xlink:label="lab_onit_ServicingAndSubservicingFeesTransferredMSR" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing and Subservicing Fees, Transferred MSR</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingAndSubservicingFeesTransferredMSR" xlink:href="onit-20260331.xsd#onit_ServicingAndSubservicingFeesTransferredMSR"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingAndSubservicingFeesTransferredMSR" xlink:to="lab_onit_ServicingAndSubservicingFeesTransferredMSR" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardsCloseToMnpiDiscIndName_terseLabel_en-US" xlink:label="lab_ecd_AwardsCloseToMnpiDiscIndName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Name</link:label>
    <link:label id="lab_ecd_AwardsCloseToMnpiDiscIndName_label_en-US" xlink:label="lab_ecd_AwardsCloseToMnpiDiscIndName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Awards Close in Time to MNPI Disclosures, Individual Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardsCloseToMnpiDiscIndName" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AwardsCloseToMnpiDiscIndName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardsCloseToMnpiDiscIndName" xlink:to="lab_ecd_AwardsCloseToMnpiDiscIndName" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_HomeEquityConversionMortgageBackedSecurityRepurchasesOutstandingValue_019cc591-a808-7a43-890a-3097e85087d9_periodStartLabel_en-US" xlink:label="lab_onit_HomeEquityConversionMortgageBackedSecurityRepurchasesOutstandingValue" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance, repurchase securities, amount</link:label>
    <link:label id="lab_onit_HomeEquityConversionMortgageBackedSecurityRepurchasesOutstandingValue_019cc591-a808-7ae9-8e09-bff74a3f6346_periodEndLabel_en-US" xlink:label="lab_onit_HomeEquityConversionMortgageBackedSecurityRepurchasesOutstandingValue" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance, repurchase securities, amount</link:label>
    <link:label id="lab_onit_HomeEquityConversionMortgageBackedSecurityRepurchasesOutstandingValue_label_en-US" xlink:label="lab_onit_HomeEquityConversionMortgageBackedSecurityRepurchasesOutstandingValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Home Equity Conversion Mortgage-Backed Security Repurchases Outstanding, Value</link:label>
    <link:label id="lab_onit_HomeEquityConversionMortgageBackedSecurityRepurchasesOutstandingValue_documentation_en-US" xlink:label="lab_onit_HomeEquityConversionMortgageBackedSecurityRepurchasesOutstandingValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This represents the amount of HMBS repurchase securities outstanding.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_HomeEquityConversionMortgageBackedSecurityRepurchasesOutstandingValue" xlink:href="onit-20260331.xsd#onit_HomeEquityConversionMortgageBackedSecurityRepurchasesOutstandingValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_HomeEquityConversionMortgageBackedSecurityRepurchasesOutstandingValue" xlink:to="lab_onit_HomeEquityConversionMortgageBackedSecurityRepurchasesOutstandingValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent_019cc591-a891-7d0c-bb0c-89edb9a35139_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent_label_en-US" xlink:label="lab_us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Accrued Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent" xlink:to="lab_us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AggtErrCompNotYetDeterminedTextBlock_terseLabel_en-US" xlink:label="lab_ecd_AggtErrCompNotYetDeterminedTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate Erroneous Compensation Not Yet Determined</link:label>
    <link:label id="lab_ecd_AggtErrCompNotYetDeterminedTextBlock_label_en-US" xlink:label="lab_ecd_AggtErrCompNotYetDeterminedTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aggregate Erroneous Compensation Not Yet Determined [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AggtErrCompNotYetDeterminedTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AggtErrCompNotYetDeterminedTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AggtErrCompNotYetDeterminedTextBlock" xlink:to="lab_ecd_AggtErrCompNotYetDeterminedTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_SeriesTwoThousandFifteenVariableFundingNotesMember_019cc591-a891-76d8-a5a3-aefcf1fac3e9_terseLabel_en-US" xlink:label="lab_onit_SeriesTwoThousandFifteenVariableFundingNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advance Receivables Backed Notes - Series 2015-VF5</link:label>
    <link:label id="lab_onit_SeriesTwoThousandFifteenVariableFundingNotesMember_label_en-US" xlink:label="lab_onit_SeriesTwoThousandFifteenVariableFundingNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Series Two Thousand Fifteen Variable Funding Notes [Member]</link:label>
    <link:label id="lab_onit_SeriesTwoThousandFifteenVariableFundingNotesMember_documentation_en-US" xlink:label="lab_onit_SeriesTwoThousandFifteenVariableFundingNotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Series 2015 variable funding notes.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_SeriesTwoThousandFifteenVariableFundingNotesMember" xlink:href="onit-20260331.xsd#onit_SeriesTwoThousandFifteenVariableFundingNotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_SeriesTwoThousandFifteenVariableFundingNotesMember" xlink:to="lab_onit_SeriesTwoThousandFifteenVariableFundingNotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoanCommitmentAverageTerm_019cc591-a808-7bb8-aca7-42c69644fce6_terseLabel_en-US" xlink:label="lab_onit_LoanCommitmentAverageTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loan commitment, average term</link:label>
    <link:label id="lab_onit_LoanCommitmentAverageTerm_label_en-US" xlink:label="lab_onit_LoanCommitmentAverageTerm" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loan Commitment, Average Term</link:label>
    <link:label id="lab_onit_LoanCommitmentAverageTerm_documentation_en-US" xlink:label="lab_onit_LoanCommitmentAverageTerm" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loan Commitment, Average Term</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoanCommitmentAverageTerm" xlink:href="onit-20260331.xsd#onit_LoanCommitmentAverageTerm"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoanCommitmentAverageTerm" xlink:to="lab_onit_LoanCommitmentAverageTerm" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ContractuallySpecifiedSubservicingFeesAmount_019cc591-a891-707a-adac-24977cddce63_terseLabel_en-US" xlink:label="lab_onit_ContractuallySpecifiedSubservicingFeesAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subservicing fees</link:label>
    <link:label id="lab_onit_ContractuallySpecifiedSubservicingFeesAmount_label_en-US" xlink:label="lab_onit_ContractuallySpecifiedSubservicingFeesAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contractually Specified Subservicing Fees Amount</link:label>
    <link:label id="lab_onit_ContractuallySpecifiedSubservicingFeesAmount_documentation_en-US" xlink:label="lab_onit_ContractuallySpecifiedSubservicingFeesAmount" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">All amounts that, per contract, are due to the subservicer in exchange for subservicing the financial asset and would no longer be received by a subservicer if the owners of the servicing rights were to exercise their authority under the contract to shift the subservicing to another servicer.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ContractuallySpecifiedSubservicingFeesAmount" xlink:href="onit-20260331.xsd#onit_ContractuallySpecifiedSubservicingFeesAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ContractuallySpecifiedSubservicingFeesAmount" xlink:to="lab_onit_ContractuallySpecifiedSubservicingFeesAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_SecuritizationsAndVariableInterestEntitiesTextBlock_019cc591-a75f-7564-82de-28364704eaa7_terseLabel_en-US" xlink:label="lab_onit_SecuritizationsAndVariableInterestEntitiesTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Securitizations and Variable Interest Entities</link:label>
    <link:label id="lab_onit_SecuritizationsAndVariableInterestEntitiesTextBlock_label_en-US" xlink:label="lab_onit_SecuritizationsAndVariableInterestEntitiesTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Securitizations And Variable Interest Entities [Text Block]</link:label>
    <link:label id="lab_onit_SecuritizationsAndVariableInterestEntitiesTextBlock_documentation_en-US" xlink:label="lab_onit_SecuritizationsAndVariableInterestEntitiesTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The entire disclosure for securitizations of residential mortgage loans and financings of advances on loans serviced for others.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_SecuritizationsAndVariableInterestEntitiesTextBlock" xlink:href="onit-20260331.xsd#onit_SecuritizationsAndVariableInterestEntitiesTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_SecuritizationsAndVariableInterestEntitiesTextBlock" xlink:to="lab_onit_SecuritizationsAndVariableInterestEntitiesTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_019dd4a2-8042-73e5-ac80-80e164f26d38_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Exercise of common stock warrants</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Value, Conversion of Convertible Securities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock_019cc591-a808-7870-89b2-06354b140790_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Reverse Mortgage Revenue, Net</link:label>
    <link:label id="lab_us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock" xlink:to="lab_us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_OriginalRightstoMortgageServicingRightsAgreementsMember_019cc591-a892-73d5-b3c8-36a5dd1eb455_terseLabel_en-US" xlink:label="lab_onit_OriginalRightstoMortgageServicingRightsAgreementsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Original Rights to Mortgage Servicing Rights Agreements</link:label>
    <link:label id="lab_onit_OriginalRightstoMortgageServicingRightsAgreementsMember_label_en-US" xlink:label="lab_onit_OriginalRightstoMortgageServicingRightsAgreementsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Original Rights to Mortgage Servicing Rights Agreements [Member]</link:label>
    <link:label id="lab_onit_OriginalRightstoMortgageServicingRightsAgreementsMember_documentation_en-US" xlink:label="lab_onit_OriginalRightstoMortgageServicingRightsAgreementsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Original rights to mortgage servicing rights agreement.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OriginalRightstoMortgageServicingRightsAgreementsMember" xlink:href="onit-20260331.xsd#onit_OriginalRightstoMortgageServicingRightsAgreementsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_OriginalRightstoMortgageServicingRightsAgreementsMember" xlink:to="lab_onit_OriginalRightstoMortgageServicingRightsAgreementsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesRepaymentsOfLoansPreviouslyHeldForInvestment_019ddefd-60e8-7dba-a08d-fbae5e9c1702_terseLabel_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesRepaymentsOfLoansPreviouslyHeldForInvestment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Repayments Of Loans Previously Held For Investment</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesRepaymentsOfLoansPreviouslyHeldForInvestment_label_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesRepaymentsOfLoansPreviouslyHeldForInvestment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Repayments Of Loans Previously Held For Investment</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesRepaymentsOfLoansPreviouslyHeldForInvestment_documentation_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesRepaymentsOfLoansPreviouslyHeldForInvestment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Repayments Of Loans Previously Held For Investment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForSaleReverseMortgagesRepaymentsOfLoansPreviouslyHeldForInvestment" xlink:href="onit-20260331.xsd#onit_LoansHeldForSaleReverseMortgagesRepaymentsOfLoansPreviouslyHeldForInvestment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForSaleReverseMortgagesRepaymentsOfLoansPreviouslyHeldForInvestment" xlink:to="lab_onit_LoansHeldForSaleReverseMortgagesRepaymentsOfLoansPreviouslyHeldForInvestment" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueByLiabilityClassAxis_019cc591-a75f-7c05-b9a8-7ce47858be02_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByLiabilityClassAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liability Class [Axis]</link:label>
    <link:label id="lab_us-gaap_FairValueByLiabilityClassAxis_label_en-US" xlink:label="lab_us-gaap_FairValueByLiabilityClassAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability Class [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis" xlink:to="lab_us-gaap_FairValueByLiabilityClassAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SegmentDomain_019cc591-a891-778f-a9c8-28b2ee2c2c2a_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segments [Domain]</link:label>
    <link:label id="lab_us-gaap_SegmentDomain_label_en-US" xlink:label="lab_us-gaap_SegmentDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segments [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentDomain" xlink:to="lab_us-gaap_SegmentDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueOtherChangesThatAffectBalance_019cc591-a808-7e5a-9547-d5c91d67ceab_terseLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueOtherChangesThatAffectBalance" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing transfers and adjustments</link:label>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueOtherChangesThatAffectBalance_label_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueOtherChangesThatAffectBalance" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset at Fair Value, Other Changes that Affect Balance</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueOtherChangesThatAffectBalance" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueOtherChangesThatAffectBalance"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingAssetAtFairValueOtherChangesThatAffectBalance" xlink:to="lab_us-gaap_ServicingAssetAtFairValueOtherChangesThatAffectBalance" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_019cc591-a808-7e77-956d-5f9a8d0609d1_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available committed and uncommitted borrowing capacity</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Remaining Borrowing Capacity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:to="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cc591-a808-71c3-a998-f45c5019f84e_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Domain]</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_HMBSRelatedBorrowingsChangeInFairValue_019cc591-a808-7efe-8b47-71b812648f7f_terseLabel_en-US" xlink:label="lab_onit_HMBSRelatedBorrowingsChangeInFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in fair value</link:label>
    <link:label id="lab_onit_HMBSRelatedBorrowingsChangeInFairValue_label_en-US" xlink:label="lab_onit_HMBSRelatedBorrowingsChangeInFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">HMBS Related Borrowings, Change in Fair Value</link:label>
    <link:label id="lab_onit_HMBSRelatedBorrowingsChangeInFairValue_documentation_en-US" xlink:label="lab_onit_HMBSRelatedBorrowingsChangeInFairValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Change in fair value related to home equity conversion mortgage-backed securities related borrowings accounted for as a financing.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_HMBSRelatedBorrowingsChangeInFairValue" xlink:href="onit-20260331.xsd#onit_HMBSRelatedBorrowingsChangeInFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_HMBSRelatedBorrowingsChangeInFairValue" xlink:to="lab_onit_HMBSRelatedBorrowingsChangeInFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_MarketBasedMember_019cc591-a75e-7e4d-830a-79febf8be158_terseLabel_en-US" xlink:label="lab_onit_MarketBasedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Market Based</link:label>
    <link:label id="lab_onit_MarketBasedMember_label_en-US" xlink:label="lab_onit_MarketBasedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Market Based [Member]</link:label>
    <link:label id="lab_onit_MarketBasedMember_documentation_en-US" xlink:label="lab_onit_MarketBasedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_MarketBasedMember" xlink:href="onit-20260331.xsd#onit_MarketBasedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_MarketBasedMember" xlink:to="lab_onit_MarketBasedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingAssetsAtFairValueNetAdditionsSalesRecognized_019cc591-a891-7b7c-858e-de748c39d857_terseLabel_en-US" xlink:label="lab_onit_ServicingAssetsAtFairValueNetAdditionsSalesRecognized" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing assets at fair value, net additions (sales) recognized</link:label>
    <link:label id="lab_onit_ServicingAssetsAtFairValueNetAdditionsSalesRecognized_label_en-US" xlink:label="lab_onit_ServicingAssetsAtFairValueNetAdditionsSalesRecognized" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing assets at fair value, net additions (sales) recognized</link:label>
    <link:label id="lab_onit_ServicingAssetsAtFairValueNetAdditionsSalesRecognized_documentation_en-US" xlink:label="lab_onit_ServicingAssetsAtFairValueNetAdditionsSalesRecognized" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing assets at fair value, net additions (sales) recognized</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingAssetsAtFairValueNetAdditionsSalesRecognized" xlink:href="onit-20260331.xsd#onit_ServicingAssetsAtFairValueNetAdditionsSalesRecognized"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingAssetsAtFairValueNetAdditionsSalesRecognized" xlink:to="lab_onit_ServicingAssetsAtFairValueNetAdditionsSalesRecognized" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AmortizationOfFinancingCostsAndDiscounts_019cc591-a892-7b4f-ae41-1c27167d52ac_terseLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amortization of debt issuance costs, discount and premium</link:label>
    <link:label id="lab_us-gaap_AmortizationOfFinancingCostsAndDiscounts_label_en-US" xlink:label="lab_us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amortization of Debt Issuance Costs and Discounts</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:to="lab_us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingAndSubservicingFees_019cc591-a75e-7c4b-950d-f908a708ad3b_terseLabel_en-US" xlink:label="lab_onit_ServicingAndSubservicingFees" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing and subservicing fees</link:label>
    <link:label id="lab_onit_ServicingAndSubservicingFees_019cc591-a75e-759f-b469-ddd11171a6cd_totalLabel_en-US" xlink:label="lab_onit_ServicingAndSubservicingFees" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Servicing and subservicing fees</link:label>
    <link:label id="lab_onit_ServicingAndSubservicingFees_label_en-US" xlink:label="lab_onit_ServicingAndSubservicingFees" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing And Subservicing Fees</link:label>
    <link:label id="lab_onit_ServicingAndSubservicingFees_documentation_en-US" xlink:label="lab_onit_ServicingAndSubservicingFees" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This represents the amount of the fee earned, generally expressed as a percent of UPB, from the borrowers&#8217; payments. Also includes late fees, prepayment penalties, float earnings and other ancillary fees.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingAndSubservicingFees" xlink:href="onit-20260331.xsd#onit_ServicingAndSubservicingFees"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingAndSubservicingFees" xlink:to="lab_onit_ServicingAndSubservicingFees" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_RithmCapitalCorpMember_019cc591-a808-76b7-9801-59b01ac0efa6_terseLabel_en-US" xlink:label="lab_onit_RithmCapitalCorpMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rithm Capital Corp</link:label>
    <link:label id="lab_onit_RithmCapitalCorpMember_label_en-US" xlink:label="lab_onit_RithmCapitalCorpMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Rithm Capital Corp [Member]</link:label>
    <link:label id="lab_onit_RithmCapitalCorpMember_documentation_en-US" xlink:label="lab_onit_RithmCapitalCorpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Rithm Capital Corp. f.k.a. New Residential Investment Corp.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_RithmCapitalCorpMember" xlink:href="onit-20260331.xsd#onit_RithmCapitalCorpMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_RithmCapitalCorpMember" xlink:to="lab_onit_RithmCapitalCorpMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease_019cc591-a808-743c-aecb-1cadc5e272f3_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Provision expense</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease" xlink:to="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SeniorNotesMember_019cc591-a808-75cb-b814-c83da20cc171_terseLabel_en-US" xlink:label="lab_us-gaap_SeniorNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Senior Notes</link:label>
    <link:label id="lab_us-gaap_SeniorNotesMember_label_en-US" xlink:label="lab_us-gaap_SeniorNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Senior Notes [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorNotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SeniorNotesMember" xlink:to="lab_us-gaap_SeniorNotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OptionOnSecuritiesMember_019cc591-a808-7b15-942e-24f156b3fd82_terseLabel_en-US" xlink:label="lab_us-gaap_OptionOnSecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate option contracts</link:label>
    <link:label id="lab_us-gaap_OptionOnSecuritiesMember_label_en-US" xlink:label="lab_us-gaap_OptionOnSecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Option on Securities [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OptionOnSecuritiesMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OptionOnSecuritiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OptionOnSecuritiesMember" xlink:to="lab_us-gaap_OptionOnSecuritiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestPayableCurrentAndNoncurrent_019dd4da-36d8-7a43-952e-3171a1e1f50c_terseLabel_en-US" xlink:label="lab_us-gaap_InterestPayableCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest Payable</link:label>
    <link:label id="lab_us-gaap_InterestPayableCurrentAndNoncurrent_label_en-US" xlink:label="lab_us-gaap_InterestPayableCurrentAndNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Payable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrentAndNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPayableCurrentAndNoncurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestPayableCurrentAndNoncurrent" xlink:to="lab_us-gaap_InterestPayableCurrentAndNoncurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cc591-a891-70f2-9089-0b663205986f_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivablesPeriodPastDueAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Asset, Aging [Axis]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivablesPeriodPastDueAxis_label_en-US" xlink:label="lab_us-gaap_FinancingReceivablesPeriodPastDueAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Asset, Aging [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesPeriodPastDueAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis" xlink:to="lab_us-gaap_FinancingReceivablesPeriodPastDueAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AllExecutiveCategoriesMember_terseLabel_en-US" xlink:label="lab_ecd_AllExecutiveCategoriesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">All Executive Categories</link:label>
    <link:label id="lab_ecd_AllExecutiveCategoriesMember_label_en-US" xlink:label="lab_ecd_AllExecutiveCategoriesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">All Executive Categories [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllExecutiveCategoriesMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AllExecutiveCategoriesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AllExecutiveCategoriesMember" xlink:to="lab_ecd_AllExecutiveCategoriesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockValue_019cc591-a891-7ff5-9f97-48647477b591_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock, $0.01 par value; 13,333,333 shares authorized; 8,410,618 and 8,521,636 shares issued and outstanding at March&#160;31, 2026 and December&#160;31, 2025, respectively</link:label>
    <link:label id="lab_us-gaap_CommonStockValue_label_en-US" xlink:label="lab_us-gaap_CommonStockValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Value, Issued</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockValue" xlink:to="lab_us-gaap_CommonStockValue" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ActiveMember_019cc591-a75e-76a5-a64c-25b4c7a0d7df_terseLabel_en-US" xlink:label="lab_onit_ActiveMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Active (2)</link:label>
    <link:label id="lab_onit_ActiveMember_label_en-US" xlink:label="lab_onit_ActiveMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Active [Member]</link:label>
    <link:label id="lab_onit_ActiveMember_documentation_en-US" xlink:label="lab_onit_ActiveMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Active loans.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ActiveMember" xlink:href="onit-20260331.xsd#onit_ActiveMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ActiveMember" xlink:to="lab_onit_ActiveMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ChecksHeldForEscheat_019cc591-a808-77da-b530-b91053e74341_terseLabel_en-US" xlink:label="lab_onit_ChecksHeldForEscheat" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Checks held for escheat</link:label>
    <link:label id="lab_onit_ChecksHeldForEscheat_label_en-US" xlink:label="lab_onit_ChecksHeldForEscheat" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Checks Held For Escheat</link:label>
    <link:label id="lab_onit_ChecksHeldForEscheat_documentation_en-US" xlink:label="lab_onit_ChecksHeldForEscheat" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Carrying amount as of the balance sheet date of checks held for escheat.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ChecksHeldForEscheat" xlink:href="onit-20260331.xsd#onit_ChecksHeldForEscheat"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ChecksHeldForEscheat" xlink:to="lab_onit_ChecksHeldForEscheat" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommitmentsAndContingencies_019cc591-a891-7881-9008-1422c61c7644_terseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commitments and Contingencies (Notes 21 and 22)</link:label>
    <link:label id="lab_us-gaap_CommitmentsAndContingencies_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commitments and Contingencies</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingencies" xlink:to="lab_us-gaap_CommitmentsAndContingencies" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ScheduleofActivityinAdvancesTableTextBlock_019cc591-a891-77c5-a02f-9f6370806a65_terseLabel_en-US" xlink:label="lab_onit_ScheduleofActivityinAdvancesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Activity in Advances</link:label>
    <link:label id="lab_onit_ScheduleofActivityinAdvancesTableTextBlock_label_en-US" xlink:label="lab_onit_ScheduleofActivityinAdvancesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Activity in Advances [Table Text Block]</link:label>
    <link:label id="lab_onit_ScheduleofActivityinAdvancesTableTextBlock_documentation_en-US" xlink:label="lab_onit_ScheduleofActivityinAdvancesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of Activity in Advances [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ScheduleofActivityinAdvancesTableTextBlock" xlink:href="onit-20260331.xsd#onit_ScheduleofActivityinAdvancesTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ScheduleofActivityinAdvancesTableTextBlock" xlink:to="lab_onit_ScheduleofActivityinAdvancesTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_Advances_019cc591-a892-7f10-b276-a852eba6771f_verboseLabel_en-US" xlink:label="lab_onit_Advances" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Advances, net ($316.0 and $364.5 related to VIEs)</link:label>
    <link:label id="lab_onit_Advances_019cc591-a892-7fbf-8eb1-ca572b93b12b_terseLabel_en-US" xlink:label="lab_onit_Advances" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advances, net</link:label>
    <link:label id="lab_onit_Advances_label_en-US" xlink:label="lab_onit_Advances" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advances</link:label>
    <link:label id="lab_onit_Advances_documentation_en-US" xlink:label="lab_onit_Advances" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Carrying amount as of the balance sheet date of non-interest-bearing advances made on loans serviced for others. Includes receivables for funds advanced by the servicer to meet contractual principal and interest remittance requirements for the investors, pay property taxes and insurance premiums and process foreclosures. Also includes receivables for funds advanced to maintain, repair and market foreclosed real estate properties on behalf of investors.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_Advances" xlink:href="onit-20260331.xsd#onit_Advances"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_Advances" xlink:to="lab_onit_Advances" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MinorityInterestTable_019cc591-a75f-7ebe-b133-8e9d89a2c584_terseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest [Table]</link:label>
    <link:label id="lab_us-gaap_MinorityInterestTable_label_en-US" xlink:label="lab_us-gaap_MinorityInterestTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MinorityInterestTable" xlink:to="lab_us-gaap_MinorityInterestTable" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_HMBSRelatedBorrowingsSecuritization_019cc591-a808-76c6-a071-d1131a5d10b6_negatedTerseLabel_en-US" xlink:label="lab_onit_HMBSRelatedBorrowingsSecuritization" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Securitization of HECM loans accounted for as a financing</link:label>
    <link:label id="lab_onit_HMBSRelatedBorrowingsSecuritization_label_en-US" xlink:label="lab_onit_HMBSRelatedBorrowingsSecuritization" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">HMBS Related Borrowings, Securitization</link:label>
    <link:label id="lab_onit_HMBSRelatedBorrowingsSecuritization_documentation_en-US" xlink:label="lab_onit_HMBSRelatedBorrowingsSecuritization" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amounts related to securitization of home equity conversion mortgage-backed securities related borrowings accounted for as a financing.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_HMBSRelatedBorrowingsSecuritization" xlink:href="onit-20260331.xsd#onit_HMBSRelatedBorrowingsSecuritization"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_HMBSRelatedBorrowingsSecuritization" xlink:to="lab_onit_HMBSRelatedBorrowingsSecuritization" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_NumberOfSubservicers_019cc591-a891-7d9d-8126-b539e269b429_terseLabel_en-US" xlink:label="lab_onit_NumberOfSubservicers" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of subservicers</link:label>
    <link:label id="lab_onit_NumberOfSubservicers_label_en-US" xlink:label="lab_onit_NumberOfSubservicers" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number Of Subservicers</link:label>
    <link:label id="lab_onit_NumberOfSubservicers_documentation_en-US" xlink:label="lab_onit_NumberOfSubservicers" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number Of Subservicers</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_NumberOfSubservicers" xlink:href="onit-20260331.xsd#onit_NumberOfSubservicers"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_NumberOfSubservicers" xlink:to="lab_onit_NumberOfSubservicers" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_TransferOfPortfolioLoansToRealEstateOwned_019cc591-a808-7a81-bb75-ffb58b0cd583_negatedTerseLabel_en-US" xlink:label="lab_onit_TransferOfPortfolioLoansToRealEstateOwned" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">REO (Other assets)</link:label>
    <link:label id="lab_onit_TransferOfPortfolioLoansToRealEstateOwned_label_en-US" xlink:label="lab_onit_TransferOfPortfolioLoansToRealEstateOwned" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Transfer Of Portfolio Loans To Real Estate Owned</link:label>
    <link:label id="lab_onit_TransferOfPortfolioLoansToRealEstateOwned_documentation_en-US" xlink:label="lab_onit_TransferOfPortfolioLoansToRealEstateOwned" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Value of loans held for sale at fair value in the entity's portfolio transferred to real estate owned in non-cash transactions.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_TransferOfPortfolioLoansToRealEstateOwned" xlink:href="onit-20260331.xsd#onit_TransferOfPortfolioLoansToRealEstateOwned"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_TransferOfPortfolioLoansToRealEstateOwned" xlink:to="lab_onit_TransferOfPortfolioLoansToRealEstateOwned" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingReceivableGovernmentInsuredLoanClaimsReverse_019cc591-a808-7b64-9ec3-bf69e885328b_terseLabel_en-US" xlink:label="lab_onit_ServicingReceivableGovernmentInsuredLoanClaimsReverse" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Government-insured loan claims - Reverse</link:label>
    <link:label id="lab_onit_ServicingReceivableGovernmentInsuredLoanClaimsReverse_label_en-US" xlink:label="lab_onit_ServicingReceivableGovernmentInsuredLoanClaimsReverse" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Receivable, Government-Insured Loan Claims Reverse</link:label>
    <link:label id="lab_onit_ServicingReceivableGovernmentInsuredLoanClaimsReverse_documentation_en-US" xlink:label="lab_onit_ServicingReceivableGovernmentInsuredLoanClaimsReverse" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Reverse servicing receivables related to government-insured loan claims</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingReceivableGovernmentInsuredLoanClaimsReverse" xlink:href="onit-20260331.xsd#onit_ServicingReceivableGovernmentInsuredLoanClaimsReverse"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingReceivableGovernmentInsuredLoanClaimsReverse" xlink:to="lab_onit_ServicingReceivableGovernmentInsuredLoanClaimsReverse" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PeoActuallyPaidCompAmt_terseLabel_en-US" xlink:label="lab_ecd_PeoActuallyPaidCompAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PEO Actually Paid Compensation Amount</link:label>
    <link:label id="lab_ecd_PeoActuallyPaidCompAmt_label_en-US" xlink:label="lab_ecd_PeoActuallyPaidCompAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">PEO Actually Paid Compensation Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PeoActuallyPaidCompAmt" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_PeoActuallyPaidCompAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PeoActuallyPaidCompAmt" xlink:to="lab_ecd_PeoActuallyPaidCompAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeFinancialInstrumentsAssetsMember_019cc591-a75f-7d94-9422-dfb1d0252286_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeFinancialInstrumentsAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">IRLCs</link:label>
    <link:label id="lab_us-gaap_DerivativeFinancialInstrumentsAssetsMember_label_en-US" xlink:label="lab_us-gaap_DerivativeFinancialInstrumentsAssetsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Financial Instruments, Assets [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFinancialInstrumentsAssetsMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFinancialInstrumentsAssetsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeFinancialInstrumentsAssetsMember" xlink:to="lab_us-gaap_DerivativeFinancialInstrumentsAssetsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_HedgedLiabilityFairValueHedge_019cc591-a891-73cb-a42a-608e1fcc29d7_terseLabel_en-US" xlink:label="lab_us-gaap_HedgedLiabilityFairValueHedge" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative related payables</link:label>
    <link:label id="lab_us-gaap_HedgedLiabilityFairValueHedge_label_en-US" xlink:label="lab_us-gaap_HedgedLiabilityFairValueHedge" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Hedged Liability, Fair Value Hedge</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgedLiabilityFairValueHedge" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgedLiabilityFairValueHedge"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HedgedLiabilityFairValueHedge" xlink:to="lab_us-gaap_HedgedLiabilityFairValueHedge" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_TotalMSRReserveFairValueGainsLosses_019cc591-a75e-75fb-b430-9ebf189682dc_terseLabel_en-US" xlink:label="lab_onit_TotalMSRReserveFairValueGainsLosses" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total MSR Reserve Fair Value Gains (Losses)</link:label>
    <link:label id="lab_onit_TotalMSRReserveFairValueGainsLosses_label_en-US" xlink:label="lab_onit_TotalMSRReserveFairValueGainsLosses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total MSR Reserve Fair Value Gains (Losses)</link:label>
    <link:label id="lab_onit_TotalMSRReserveFairValueGainsLosses_documentation_en-US" xlink:label="lab_onit_TotalMSRReserveFairValueGainsLosses" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total MSR Reserve Fair Value Gains (Losses)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_TotalMSRReserveFairValueGainsLosses" xlink:href="onit-20260331.xsd#onit_TotalMSRReserveFairValueGainsLosses"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_TotalMSRReserveFairValueGainsLosses" xlink:to="lab_onit_TotalMSRReserveFairValueGainsLosses" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FinancingReceivables60To89DaysPastDueMember_019cc591-a75e-7f05-b0b3-1a17b602eaf6_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivables60To89DaysPastDueMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Asset, 60 to 89 Days Past Due [Member]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivables60To89DaysPastDueMember_label_en-US" xlink:label="lab_us-gaap_FinancingReceivables60To89DaysPastDueMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Asset, 60 to 89 Days Past Due [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivables60To89DaysPastDueMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivables60To89DaysPastDueMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivables60To89DaysPastDueMember" xlink:to="lab_us-gaap_FinancingReceivables60To89DaysPastDueMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_FederalHousingFinanceAgencyMember_019cc591-a75f-7dd1-8bed-7b8557872903_terseLabel_en-US" xlink:label="lab_onit_FederalHousingFinanceAgencyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FHFA</link:label>
    <link:label id="lab_onit_FederalHousingFinanceAgencyMember_label_en-US" xlink:label="lab_onit_FederalHousingFinanceAgencyMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Housing Finance Agency [Member]</link:label>
    <link:label id="lab_onit_FederalHousingFinanceAgencyMember_documentation_en-US" xlink:label="lab_onit_FederalHousingFinanceAgencyMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Federal Housing Finance Agency</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_FederalHousingFinanceAgencyMember" xlink:href="onit-20260331.xsd#onit_FederalHousingFinanceAgencyMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_FederalHousingFinanceAgencyMember" xlink:to="lab_onit_FederalHousingFinanceAgencyMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_CorporateOverheadAllocations_019cc591-a891-70e8-b5db-dbce6099fcf4_terseLabel_en-US" xlink:label="lab_onit_CorporateOverheadAllocations" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Corporate Overhead Allocations</link:label>
    <link:label id="lab_onit_CorporateOverheadAllocations_label_en-US" xlink:label="lab_onit_CorporateOverheadAllocations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Corporate Overhead Allocations</link:label>
    <link:label id="lab_onit_CorporateOverheadAllocations_documentation_en-US" xlink:label="lab_onit_CorporateOverheadAllocations" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Corporate Overhead Allocations</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_CorporateOverheadAllocations" xlink:href="onit-20260331.xsd#onit_CorporateOverheadAllocations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_CorporateOverheadAllocations" xlink:to="lab_onit_CorporateOverheadAllocations" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_OASISSeries20141Member_019cc591-a891-7456-96cc-5387903749bb_terseLabel_en-US" xlink:label="lab_onit_OASISSeries20141Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OASIS Series 2014-1</link:label>
    <link:label id="lab_onit_OASISSeries20141Member_label_en-US" xlink:label="lab_onit_OASISSeries20141Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">OASIS Series 2014-1 [Member]</link:label>
    <link:label id="lab_onit_OASISSeries20141Member_documentation_en-US" xlink:label="lab_onit_OASISSeries20141Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">OASIS Series 2014-1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OASISSeries20141Member" xlink:href="onit-20260331.xsd#onit_OASISSeries20141Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_OASISSeries20141Member" xlink:to="lab_onit_OASISSeries20141Member" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingAndSubservicingPortfolioBenchmarkMember_019cc591-a808-7ba9-9e18-221222d1a978_terseLabel_en-US" xlink:label="lab_onit_ServicingAndSubservicingPortfolioBenchmarkMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing and Subservicing Portfolio Benchmark</link:label>
    <link:label id="lab_onit_ServicingAndSubservicingPortfolioBenchmarkMember_label_en-US" xlink:label="lab_onit_ServicingAndSubservicingPortfolioBenchmarkMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing and Subservicing Portfolio Benchmark [Member]</link:label>
    <link:label id="lab_onit_ServicingAndSubservicingPortfolioBenchmarkMember_documentation_en-US" xlink:label="lab_onit_ServicingAndSubservicingPortfolioBenchmarkMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing and Subservicing Portfolio Benchmark</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingAndSubservicingPortfolioBenchmarkMember" xlink:href="onit-20260331.xsd#onit_ServicingAndSubservicingPortfolioBenchmarkMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingAndSubservicingPortfolioBenchmarkMember" xlink:to="lab_onit_ServicingAndSubservicingPortfolioBenchmarkMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_StatementScenarioAxis_019dd4f3-32c1-79bb-a542-410c695989ce_terseLabel_en-US" xlink:label="lab_srt_StatementScenarioAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Scenario [Axis]</link:label>
    <link:label id="lab_srt_StatementScenarioAxis_label_en-US" xlink:label="lab_srt_StatementScenarioAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Scenario [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_StatementScenarioAxis" xlink:to="lab_srt_StatementScenarioAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToLoansHeldForSaleAtFairValue_019cc591-a891-7dc4-8d5a-b41d34696b2c_negatedTerseLabel_en-US" xlink:label="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToLoansHeldForSaleAtFairValue" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Loans held for sale, at fair value</link:label>
    <link:label id="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToLoansHeldForSaleAtFairValue_label_en-US" xlink:label="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToLoansHeldForSaleAtFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers To Loans Held For Sale At Fair Value</link:label>
    <link:label id="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToLoansHeldForSaleAtFairValue_documentation_en-US" xlink:label="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToLoansHeldForSaleAtFairValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This represents the amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy to loans held for sale at fair value.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToLoansHeldForSaleAtFairValue" xlink:href="onit-20260331.xsd#onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToLoansHeldForSaleAtFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToLoansHeldForSaleAtFairValue" xlink:to="lab_onit_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersToLoansHeldForSaleAtFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_WarrantyRepurchaseDemandsNumberOfLoans_019cc591-a891-745f-b189-0f6fe14a8342_terseLabel_en-US" xlink:label="lab_onit_WarrantyRepurchaseDemandsNumberOfLoans" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Warranty repurchase demands number of loans</link:label>
    <link:label id="lab_onit_WarrantyRepurchaseDemandsNumberOfLoans_label_en-US" xlink:label="lab_onit_WarrantyRepurchaseDemandsNumberOfLoans" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Warranty Repurchase Demands Number Of Loans</link:label>
    <link:label id="lab_onit_WarrantyRepurchaseDemandsNumberOfLoans_documentation_en-US" xlink:label="lab_onit_WarrantyRepurchaseDemandsNumberOfLoans" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the number of loans related to outstanding representation and warranty repurchase demands as of the end of the period.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_WarrantyRepurchaseDemandsNumberOfLoans" xlink:href="onit-20260331.xsd#onit_WarrantyRepurchaseDemandsNumberOfLoans"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_WarrantyRepurchaseDemandsNumberOfLoans" xlink:to="lab_onit_WarrantyRepurchaseDemandsNumberOfLoans" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesRepayments_019cc591-a891-7e50-b753-cb94cd74e5ac_negatedTerseLabel_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesRepayments" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Repayments (principal payments received)</link:label>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesRepayments_label_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesRepayments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Investment, Reverse Mortgages, Repayments</link:label>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesRepayments_documentation_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesRepayments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Principal payments received on loans held for investment during the period.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForInvestmentReverseMortgagesRepayments" xlink:href="onit-20260331.xsd#onit_LoansHeldForInvestmentReverseMortgagesRepayments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForInvestmentReverseMortgagesRepayments" xlink:to="lab_onit_LoansHeldForInvestmentReverseMortgagesRepayments" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DerivativeContractTypeDomain_019cc591-a808-7b55-a9b0-5eaf594299b8_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeContractTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Contract [Domain]</link:label>
    <link:label id="lab_us-gaap_DerivativeContractTypeDomain_label_en-US" xlink:label="lab_us-gaap_DerivativeContractTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Contract [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeContractTypeDomain" xlink:to="lab_us-gaap_DerivativeContractTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerGross_019cc591-a75e-7ca1-84b8-603e8972d69b_terseLabel_en-US" xlink:label="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerGross" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advances, gross</link:label>
    <link:label id="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerGross_label_en-US" xlink:label="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerGross" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advances Payments On Behalf Of Borrower Gross</link:label>
    <link:label id="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerGross_documentation_en-US" xlink:label="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerGross" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total advance payments made by financial institutions on behalf of borrowers in a servicing relationship.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AdvancesPaymentsOnBehalfOfBorrowerGross" xlink:href="onit-20260331.xsd#onit_AdvancesPaymentsOnBehalfOfBorrowerGross"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AdvancesPaymentsOnBehalfOfBorrowerGross" xlink:to="lab_onit_AdvancesPaymentsOnBehalfOfBorrowerGross" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AllIndividualsMember_terseLabel_en-US" xlink:label="lab_ecd_AllIndividualsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">All Individuals</link:label>
    <link:label id="lab_ecd_AllIndividualsMember_label_en-US" xlink:label="lab_ecd_AllIndividualsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">All Individuals [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllIndividualsMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AllIndividualsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="lab_ecd_AllIndividualsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LongtermDebtTypeDomain_019cc591-a808-7a2e-9f46-fe4732e1a2f3_terseLabel_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term Debt, Type [Domain]</link:label>
    <link:label id="lab_us-gaap_LongtermDebtTypeDomain_label_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-Term Debt, Type [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongtermDebtTypeDomain" xlink:to="lab_us-gaap_LongtermDebtTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueDisclosuresAbstract_019cc591-a891-77d9-860b-c5791ed4cbdb_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Disclosures [Abstract]</link:label>
    <link:label id="lab_us-gaap_FairValueDisclosuresAbstract_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Disclosures [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosuresAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract" xlink:to="lab_us-gaap_FairValueDisclosuresAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019cc591-a808-7f3f-9768-711a93168229_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Additions to premises and equipment</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Property, Plant, and Equipment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:to="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ForgoneRecoveryIndName_terseLabel_en-US" xlink:label="lab_ecd_ForgoneRecoveryIndName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Name</link:label>
    <link:label id="lab_ecd_ForgoneRecoveryIndName_label_en-US" xlink:label="lab_ecd_ForgoneRecoveryIndName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Forgone Recovery, Individual Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ForgoneRecoveryIndName" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_ForgoneRecoveryIndName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_ForgoneRecoveryIndName" xlink:to="lab_ecd_ForgoneRecoveryIndName" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RegulatoryAgencyDomain_019cc591-a808-7315-9453-9fc95b5d097b_terseLabel_en-US" xlink:label="lab_us-gaap_RegulatoryAgencyDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Regulatory Agency [Domain]</link:label>
    <link:label id="lab_us-gaap_RegulatoryAgencyDomain_label_en-US" xlink:label="lab_us-gaap_RegulatoryAgencyDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Regulatory Agency [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAgencyDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RegulatoryAgencyDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RegulatoryAgencyDomain" xlink:to="lab_us-gaap_RegulatoryAgencyDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember_terseLabel_en-US" xlink:label="lab_ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested</link:label>
    <link:label id="lab_ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember_label_en-US" xlink:label="lab_ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember" xlink:to="lab_ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ForwardMortgageLoansMember_019cc591-a75e-7bad-a05c-b188dcd57eaa_terseLabel_en-US" xlink:label="lab_onit_ForwardMortgageLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gain (loss) on Sale of Forward Mortgage Loans</link:label>
    <link:label id="lab_onit_ForwardMortgageLoansMember_label_en-US" xlink:label="lab_onit_ForwardMortgageLoansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Forward Mortgage Loans [Member]</link:label>
    <link:label id="lab_onit_ForwardMortgageLoansMember_documentation_en-US" xlink:label="lab_onit_ForwardMortgageLoansMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Forward mortgage loans that are originated or purchase from third parties.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ForwardMortgageLoansMember" xlink:href="onit-20260331.xsd#onit_ForwardMortgageLoansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ForwardMortgageLoansMember" xlink:to="lab_onit_ForwardMortgageLoansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ScheduleofInterestExpenseLineItems_019cc591-a808-7c92-bcc9-e342815cc121_terseLabel_en-US" xlink:label="lab_onit_ScheduleofInterestExpenseLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Interest Expense [Line Items]</link:label>
    <link:label id="lab_onit_ScheduleofInterestExpenseLineItems_label_en-US" xlink:label="lab_onit_ScheduleofInterestExpenseLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Interest Expense [Line Items]</link:label>
    <link:label id="lab_onit_ScheduleofInterestExpenseLineItems_documentation_en-US" xlink:label="lab_onit_ScheduleofInterestExpenseLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">[Line Items] for Schedule of Interest Expense [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ScheduleofInterestExpenseLineItems" xlink:href="onit-20260331.xsd#onit_ScheduleofInterestExpenseLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ScheduleofInterestExpenseLineItems" xlink:to="lab_onit_ScheduleofInterestExpenseLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtWeightedAverageInterestRate_019cc591-a891-79b7-9f5e-df688ea691ef_terseLabel_en-US" xlink:label="lab_us-gaap_DebtWeightedAverageInterestRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted average interest rate</link:label>
    <link:label id="lab_us-gaap_DebtWeightedAverageInterestRate_label_en-US" xlink:label="lab_us-gaap_DebtWeightedAverageInterestRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt, Weighted Average Interest Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtWeightedAverageInterestRate" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtWeightedAverageInterestRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtWeightedAverageInterestRate" xlink:to="lab_us-gaap_DebtWeightedAverageInterestRate" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_BankServicingFeesRetained_019cc591-a891-70ac-9cb9-cabad5d3fe6a_terseLabel_en-US" xlink:label="lab_onit_BankServicingFeesRetained" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Less: Subservicing fee retained by Onity</link:label>
    <link:label id="lab_onit_BankServicingFeesRetained_label_en-US" xlink:label="lab_onit_BankServicingFeesRetained" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Bank Servicing Fees Retained</link:label>
    <link:label id="lab_onit_BankServicingFeesRetained_documentation_en-US" xlink:label="lab_onit_BankServicingFeesRetained" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Bank Servicing Fees Retained</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_BankServicingFeesRetained" xlink:href="onit-20260331.xsd#onit_BankServicingFeesRetained"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_BankServicingFeesRetained" xlink:to="lab_onit_BankServicingFeesRetained" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AdvancesTransferToLoansHeldForSale_019cc591-a891-781f-9959-1828fa1afa76_negatedTerseLabel_en-US" xlink:label="lab_onit_AdvancesTransferToLoansHeldForSale" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Advances, Transfer to Loans Held For Sale</link:label>
    <link:label id="lab_onit_AdvancesTransferToLoansHeldForSale_label_en-US" xlink:label="lab_onit_AdvancesTransferToLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advances, Transfer to Loans Held For Sale</link:label>
    <link:label id="lab_onit_AdvancesTransferToLoansHeldForSale_documentation_en-US" xlink:label="lab_onit_AdvancesTransferToLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Advances, Transfer to Loans Held For Sale</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AdvancesTransferToLoansHeldForSale" xlink:href="onit-20260331.xsd#onit_AdvancesTransferToLoansHeldForSale"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AdvancesTransferToLoansHeldForSale" xlink:to="lab_onit_AdvancesTransferToLoansHeldForSale" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_HECMLoansSecuritizedPledgedToHMBSRelatedBorrowingsMember_019dd49c-500f-7992-b1aa-5a9470493e44_terseLabel_en-US" xlink:label="lab_onit_HECMLoansSecuritizedPledgedToHMBSRelatedBorrowingsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HECM Loans - Securitized, Pledged To HMBS-Related Borrowings</link:label>
    <link:label id="lab_onit_HECMLoansSecuritizedPledgedToHMBSRelatedBorrowingsMember_label_en-US" xlink:label="lab_onit_HECMLoansSecuritizedPledgedToHMBSRelatedBorrowingsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">HECM Loans - Securitized, Pledged To HMBS-Related Borrowings [Member]</link:label>
    <link:label id="lab_onit_HECMLoansSecuritizedPledgedToHMBSRelatedBorrowingsMember_documentation_en-US" xlink:label="lab_onit_HECMLoansSecuritizedPledgedToHMBSRelatedBorrowingsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">HECM Loans - Securitized, Pledged To HMBS-Related Borrowings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_HECMLoansSecuritizedPledgedToHMBSRelatedBorrowingsMember" xlink:href="onit-20260331.xsd#onit_HECMLoansSecuritizedPledgedToHMBSRelatedBorrowingsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_HECMLoansSecuritizedPledgedToHMBSRelatedBorrowingsMember" xlink:to="lab_onit_HECMLoansSecuritizedPledgedToHMBSRelatedBorrowingsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_SubservicingFeesAndReimbursableExpenses_019cc591-a891-79da-a811-af571e4d9dc4_terseLabel_en-US" xlink:label="lab_onit_SubservicingFeesAndReimbursableExpenses" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subservicing fees and reimbursable expenses</link:label>
    <link:label id="lab_onit_SubservicingFeesAndReimbursableExpenses_label_en-US" xlink:label="lab_onit_SubservicingFeesAndReimbursableExpenses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subservicing Fees And Reimbursable Expenses</link:label>
    <link:label id="lab_onit_SubservicingFeesAndReimbursableExpenses_documentation_en-US" xlink:label="lab_onit_SubservicingFeesAndReimbursableExpenses" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Subservicing fees and reimbursable expenses.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_SubservicingFeesAndReimbursableExpenses" xlink:href="onit-20260331.xsd#onit_SubservicingFeesAndReimbursableExpenses"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_SubservicingFeesAndReimbursableExpenses" xlink:to="lab_onit_SubservicingFeesAndReimbursableExpenses" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromNotesPayable_019dd503-d0e6-7e9c-bfdb-53ae5045cbed_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromNotesPayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from issuance of Senior notes</link:label>
    <link:label id="lab_us-gaap_ProceedsFromNotesPayable_label_en-US" xlink:label="lab_us-gaap_ProceedsFromNotesPayable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Notes Payable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromNotesPayable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromNotesPayable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromNotesPayable" xlink:to="lab_us-gaap_ProceedsFromNotesPayable" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingAssetAtFairValueChangeInFairValueDueToRealizationOfExpectedCashFlows_019cc591-a75f-73a7-b206-111dfdffa841_terseLabel_en-US" xlink:label="lab_onit_ServicingAssetAtFairValueChangeInFairValueDueToRealizationOfExpectedCashFlows" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing Asset at Fair Value, Change In Fair Value Due To Realization Of Expected Cash Flows</link:label>
    <link:label id="lab_onit_ServicingAssetAtFairValueChangeInFairValueDueToRealizationOfExpectedCashFlows_label_en-US" xlink:label="lab_onit_ServicingAssetAtFairValueChangeInFairValueDueToRealizationOfExpectedCashFlows" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset at Fair Value, Change In Fair Value Due To Realization Of Expected Cash Flows</link:label>
    <link:label id="lab_onit_ServicingAssetAtFairValueChangeInFairValueDueToRealizationOfExpectedCashFlows_documentation_en-US" xlink:label="lab_onit_ServicingAssetAtFairValueChangeInFairValueDueToRealizationOfExpectedCashFlows" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing Asset at Fair Value, Change In Fair Value Due To Realization Of Expected Cash Flows</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingAssetAtFairValueChangeInFairValueDueToRealizationOfExpectedCashFlows" xlink:href="onit-20260331.xsd#onit_ServicingAssetAtFairValueChangeInFairValueDueToRealizationOfExpectedCashFlows"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingAssetAtFairValueChangeInFairValueDueToRealizationOfExpectedCashFlows" xlink:to="lab_onit_ServicingAssetAtFairValueChangeInFairValueDueToRealizationOfExpectedCashFlows" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ErrCompAnalysisTextBlock_terseLabel_en-US" xlink:label="lab_ecd_ErrCompAnalysisTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Erroneous Compensation Analysis</link:label>
    <link:label id="lab_ecd_ErrCompAnalysisTextBlock_label_en-US" xlink:label="lab_ecd_ErrCompAnalysisTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Erroneous Compensation Analysis [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ErrCompAnalysisTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_ErrCompAnalysisTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_ErrCompAnalysisTextBlock" xlink:to="lab_ecd_ErrCompAnalysisTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_DebtInstruentRedemptionPercentageOfPremium_019cc591-a891-79eb-a0f8-63ed2384be34_terseLabel_en-US" xlink:label="lab_onit_DebtInstruentRedemptionPercentageOfPremium" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instruent, Redemption Percentage Of Premium</link:label>
    <link:label id="lab_onit_DebtInstruentRedemptionPercentageOfPremium_label_en-US" xlink:label="lab_onit_DebtInstruentRedemptionPercentageOfPremium" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instruent, Redemption Percentage Of Premium</link:label>
    <link:label id="lab_onit_DebtInstruentRedemptionPercentageOfPremium_documentation_en-US" xlink:label="lab_onit_DebtInstruentRedemptionPercentageOfPremium" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instruent, Redemption Percentage Of Premium</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_DebtInstruentRedemptionPercentageOfPremium" xlink:href="onit-20260331.xsd#onit_DebtInstruentRedemptionPercentageOfPremium"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_DebtInstruentRedemptionPercentageOfPremium" xlink:to="lab_onit_DebtInstruentRedemptionPercentageOfPremium" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LineOfCreditFacilityLineItems_019cc591-a891-7084-918d-a1d18f664cf9_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of Credit Facility [Line Items]</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityLineItems_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems" xlink:to="lab_us-gaap_LineOfCreditFacilityLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_DebtInstrumentCovenantComplianceMinimumLiquidityRequirement_019cc591-a808-7c8c-98d2-1ad6879fd169_terseLabel_en-US" xlink:label="lab_onit_DebtInstrumentCovenantComplianceMinimumLiquidityRequirement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restrictive liquidity requirements</link:label>
    <link:label id="lab_onit_DebtInstrumentCovenantComplianceMinimumLiquidityRequirement_label_en-US" xlink:label="lab_onit_DebtInstrumentCovenantComplianceMinimumLiquidityRequirement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Covenant Compliance, Minimum Liquidity Requirement</link:label>
    <link:label id="lab_onit_DebtInstrumentCovenantComplianceMinimumLiquidityRequirement_documentation_en-US" xlink:label="lab_onit_DebtInstrumentCovenantComplianceMinimumLiquidityRequirement" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instrument, Covenant Compliance, Minimum Liquidity Requirement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_DebtInstrumentCovenantComplianceMinimumLiquidityRequirement" xlink:href="onit-20260331.xsd#onit_DebtInstrumentCovenantComplianceMinimumLiquidityRequirement"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_DebtInstrumentCovenantComplianceMinimumLiquidityRequirement" xlink:to="lab_onit_DebtInstrumentCovenantComplianceMinimumLiquidityRequirement" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_StatementGeographicalAxis_019cc591-a891-7852-825c-a9cdcec2bf1c_terseLabel_en-US" xlink:label="lab_srt_StatementGeographicalAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Geographical [Axis]</link:label>
    <link:label id="lab_srt_StatementGeographicalAxis_label_en-US" xlink:label="lab_srt_StatementGeographicalAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographical [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_StatementGeographicalAxis" xlink:to="lab_srt_StatementGeographicalAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_QualitativeAndQuantitativeInformationTransferorsContinuingInvolvementLineItems_019cc591-a808-7e0e-a5cd-b981badaeeae_terseLabel_en-US" xlink:label="lab_us-gaap_QualitativeAndQuantitativeInformationTransferorsContinuingInvolvementLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]</link:label>
    <link:label id="lab_us-gaap_QualitativeAndQuantitativeInformationTransferorsContinuingInvolvementLineItems_label_en-US" xlink:label="lab_us-gaap_QualitativeAndQuantitativeInformationTransferorsContinuingInvolvementLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_QualitativeAndQuantitativeInformationTransferorsContinuingInvolvementLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_QualitativeAndQuantitativeInformationTransferorsContinuingInvolvementLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_QualitativeAndQuantitativeInformationTransferorsContinuingInvolvementLineItems" xlink:to="lab_us-gaap_QualitativeAndQuantitativeInformationTransferorsContinuingInvolvementLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_Rule10b51ArrTrmntdFlag_terseLabel_en-US" xlink:label="lab_ecd_Rule10b51ArrTrmntdFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rule 10b5-1 Arrangement Terminated</link:label>
    <link:label id="lab_ecd_Rule10b51ArrTrmntdFlag_label_en-US" xlink:label="lab_ecd_Rule10b51ArrTrmntdFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Rule 10b5-1 Arrangement Terminated [Flag]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_Rule10b51ArrTrmntdFlag" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_Rule10b51ArrTrmntdFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_Rule10b51ArrTrmntdFlag" xlink:to="lab_ecd_Rule10b51ArrTrmntdFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_NetInterestIncomeServicingFee_019cc591-a75e-7b60-93dc-c18ab18330dc_terseLabel_en-US" xlink:label="lab_onit_NetInterestIncomeServicingFee" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net interest income (servicing fee)</link:label>
    <link:label id="lab_onit_NetInterestIncomeServicingFee_label_en-US" xlink:label="lab_onit_NetInterestIncomeServicingFee" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net interest income (servicing fee)</link:label>
    <link:label id="lab_onit_NetInterestIncomeServicingFee_documentation_en-US" xlink:label="lab_onit_NetInterestIncomeServicingFee" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Net interest income (servicing fee) - Reverse mortgages</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_NetInterestIncomeServicingFee" xlink:href="onit-20260331.xsd#onit_NetInterestIncomeServicingFee"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_NetInterestIncomeServicingFee" xlink:to="lab_onit_NetInterestIncomeServicingFee" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ScenarioForecastMember_019dd4f3-32c1-7d77-9b68-f5adde7ce9a6_terseLabel_en-US" xlink:label="lab_srt_ScenarioForecastMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Forecast</link:label>
    <link:label id="lab_srt_ScenarioForecastMember_label_en-US" xlink:label="lab_srt_ScenarioForecastMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Forecast [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioForecastMember" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioForecastMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ScenarioForecastMember" xlink:to="lab_srt_ScenarioForecastMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ErrCompRecoveryTable_terseLabel_en-US" xlink:label="lab_ecd_ErrCompRecoveryTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Erroneously Awarded Compensation Recovery</link:label>
    <link:label id="lab_ecd_ErrCompRecoveryTable_label_en-US" xlink:label="lab_ecd_ErrCompRecoveryTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Erroneously Awarded Compensation Recovery [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ErrCompRecoveryTable" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_ErrCompRecoveryTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_ErrCompRecoveryTable" xlink:to="lab_ecd_ErrCompRecoveryTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability_019dd4e0-a06e-72e9-aabd-4a759e8b7084_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability</link:label>
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability_label_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability" xlink:to="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_UnpaidPrincipalBalanceOfServicingAssetTransferred_019dd990-b599-7efe-90bd-263896ae11c1_terseLabel_en-US" xlink:label="lab_onit_UnpaidPrincipalBalanceOfServicingAssetTransferred" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">UPB of MSR liability</link:label>
    <link:label id="lab_onit_UnpaidPrincipalBalanceOfServicingAssetTransferred_label_en-US" xlink:label="lab_onit_UnpaidPrincipalBalanceOfServicingAssetTransferred" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unpaid Principal Balance Of Servicing Asset, Transferred</link:label>
    <link:label id="lab_onit_UnpaidPrincipalBalanceOfServicingAssetTransferred_documentation_en-US" xlink:label="lab_onit_UnpaidPrincipalBalanceOfServicingAssetTransferred" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Unpaid Principal Balance Of Servicing Asset, Transferred</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_UnpaidPrincipalBalanceOfServicingAssetTransferred" xlink:href="onit-20260331.xsd#onit_UnpaidPrincipalBalanceOfServicingAssetTransferred"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_UnpaidPrincipalBalanceOfServicingAssetTransferred" xlink:to="lab_onit_UnpaidPrincipalBalanceOfServicingAssetTransferred" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ConcentrationRiskBenchmarkDomain_019cc591-a891-78bd-9989-69c670e2c730_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskBenchmarkDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Concentration Risk Benchmark [Domain]</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskBenchmarkDomain_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskBenchmarkDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk Benchmark [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain" xlink:to="lab_us-gaap_ConcentrationRiskBenchmarkDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_Security12bTitle_019cc591-a808-7717-a32a-6fa7f624b2ca_terseLabel_en-US" xlink:label="lab_dei_Security12bTitle" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:label id="lab_dei_Security12bTitle_label_en-US" xlink:label="lab_dei_Security12bTitle" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_Security12bTitle" xlink:to="lab_dei_Security12bTitle" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_FloatingRateReverseMortgageLoansMember_019cc591-a808-7640-9133-cfc7d697821b_terseLabel_en-US" xlink:label="lab_onit_FloatingRateReverseMortgageLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Floating Rate Reverse Mortgage Loans</link:label>
    <link:label id="lab_onit_FloatingRateReverseMortgageLoansMember_label_en-US" xlink:label="lab_onit_FloatingRateReverseMortgageLoansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Floating Rate Reverse Mortgage Loans [Member]</link:label>
    <link:label id="lab_onit_FloatingRateReverseMortgageLoansMember_documentation_en-US" xlink:label="lab_onit_FloatingRateReverseMortgageLoansMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Floating rate reverse mortgage loans.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_FloatingRateReverseMortgageLoansMember" xlink:href="onit-20260331.xsd#onit_FloatingRateReverseMortgageLoansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_FloatingRateReverseMortgageLoansMember" xlink:to="lab_onit_FloatingRateReverseMortgageLoansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_IncomeTaxesPaidNetAbstract_019cc591-a808-73cf-bc4e-c59ee5ea6154_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaidNetAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income tax payments (refunds), net</link:label>
    <link:label id="lab_us-gaap_IncomeTaxesPaidNetAbstract_label_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaidNetAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Taxes Paid, Net [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesPaidNetAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxesPaidNetAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxesPaidNetAbstract" xlink:to="lab_us-gaap_IncomeTaxesPaidNetAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings_019cc591-a75e-75ca-9c37-fad09642942e_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Preferred stock dividend</link:label>
    <link:label id="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings_label_en-US" xlink:label="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments to Additional Paid in Capital, Dividends in Excess of Retained Earnings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings" xlink:to="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_OLITSecuritizationNotesMember_019dd509-8516-7f13-8c25-52d592e0b284_terseLabel_en-US" xlink:label="lab_onit_OLITSecuritizationNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OLIT Securitization Notes</link:label>
    <link:label id="lab_onit_OLITSecuritizationNotesMember_label_en-US" xlink:label="lab_onit_OLITSecuritizationNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">OLIT Securitization Notes [Member]</link:label>
    <link:label id="lab_onit_OLITSecuritizationNotesMember_documentation_en-US" xlink:label="lab_onit_OLITSecuritizationNotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">OLIT Securitization Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OLITSecuritizationNotesMember" xlink:href="onit-20260331.xsd#onit_OLITSecuritizationNotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_OLITSecuritizationNotesMember" xlink:to="lab_onit_OLITSecuritizationNotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_EarningsPerShareAbstract_019cc591-a808-76b7-a565-b2ab0a5dac3e_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Earnings Per Share [Abstract]</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareAbstract_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareAbstract" xlink:to="lab_us-gaap_EarningsPerShareAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NonoperatingIncomeExpense_019cc591-a808-7f80-a923-b7139e3f7fa3_totalLabel_en-US" xlink:label="lab_us-gaap_NonoperatingIncomeExpense" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Other income (expense), net</link:label>
    <link:label id="lab_us-gaap_NonoperatingIncomeExpense_label_en-US" xlink:label="lab_us-gaap_NonoperatingIncomeExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Nonoperating Income (Expense)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NonoperatingIncomeExpense" xlink:to="lab_us-gaap_NonoperatingIncomeExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_RepresentationWarrantyAndCompensatoryFeesObligations_019cc591-a75f-7911-b635-f843f435bca0_periodStartLabel_en-US" xlink:label="lab_onit_RepresentationWarrantyAndCompensatoryFeesObligations" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance</link:label>
    <link:label id="lab_onit_RepresentationWarrantyAndCompensatoryFeesObligations_019cc591-a75f-79e8-8444-074a36a3c417_periodEndLabel_en-US" xlink:label="lab_onit_RepresentationWarrantyAndCompensatoryFeesObligations" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance</link:label>
    <link:label id="lab_onit_RepresentationWarrantyAndCompensatoryFeesObligations_label_en-US" xlink:label="lab_onit_RepresentationWarrantyAndCompensatoryFeesObligations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Representation Warranty And Compensatory Fees Obligations</link:label>
    <link:label id="lab_onit_RepresentationWarrantyAndCompensatoryFeesObligations_documentation_en-US" xlink:label="lab_onit_RepresentationWarrantyAndCompensatoryFeesObligations" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This represents the outstanding obligation of repurchase the loans, or otherwise indemnify or reimburse the investor or insurer for losses incurred due to material breach of contractual representation and warranties.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_RepresentationWarrantyAndCompensatoryFeesObligations" xlink:href="onit-20260331.xsd#onit_RepresentationWarrantyAndCompensatoryFeesObligations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_RepresentationWarrantyAndCompensatoryFeesObligations" xlink:to="lab_onit_RepresentationWarrantyAndCompensatoryFeesObligations" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ShortTermCommitmentsToLend_019cc591-a75f-7179-8fdc-c60f7b6b960f_terseLabel_en-US" xlink:label="lab_onit_ShortTermCommitmentsToLend" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-term commitments to lend</link:label>
    <link:label id="lab_onit_ShortTermCommitmentsToLend_label_en-US" xlink:label="lab_onit_ShortTermCommitmentsToLend" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-Term Commitments To Lend</link:label>
    <link:label id="lab_onit_ShortTermCommitmentsToLend_documentation_en-US" xlink:label="lab_onit_ShortTermCommitmentsToLend" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Short-term commitments to lend.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ShortTermCommitmentsToLend" xlink:href="onit-20260331.xsd#onit_ShortTermCommitmentsToLend"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ShortTermCommitmentsToLend" xlink:to="lab_onit_ShortTermCommitmentsToLend" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock_019cc591-a75f-7850-aae5-21ec25a8e10e_terseLabel_en-US" xlink:label="lab_us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Components of Interest Expense</link:label>
    <link:label id="lab_us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock_label_en-US" xlink:label="lab_us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Income and Interest Expense Disclosure [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock" xlink:to="lab_us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesTransferToOther_019dd988-44ab-7841-862c-25c8f3d8e4a5_terseLabel_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesTransferToOther" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesTransferToOther_label_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesTransferToOther" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Transfer To Other</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesTransferToOther_documentation_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesTransferToOther" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Transfer To Other</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForSaleReverseMortgagesTransferToOther" xlink:href="onit-20260331.xsd#onit_LoansHeldForSaleReverseMortgagesTransferToOther"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForSaleReverseMortgagesTransferToOther" xlink:to="lab_onit_LoansHeldForSaleReverseMortgagesTransferToOther" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings_019cc591-a75f-7fa8-b89c-f59afd6693bf_terseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gain (loss) on economic hedge instruments</link:label>
    <link:label id="lab_us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings_label_en-US" xlink:label="lab_us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Fair Value Hedges Recognized in Earnings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings" xlink:to="lab_us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ShortTermDebtTypeAxis_019cc591-a808-74cf-b0d5-50bc9be29900_terseLabel_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-term Debt, Type [Axis]</link:label>
    <link:label id="lab_us-gaap_ShortTermDebtTypeAxis_label_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-Term Debt, Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis" xlink:to="lab_us-gaap_ShortTermDebtTypeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_TotalFairValueChangesInServicingLiabilityAtFairValueNetOfAdjustments_019cc591-a891-7409-8114-0be68e324759_terseLabel_en-US" xlink:label="lab_onit_TotalFairValueChangesInServicingLiabilityAtFairValueNetOfAdjustments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total fair value (gain) loss</link:label>
    <link:label id="lab_onit_TotalFairValueChangesInServicingLiabilityAtFairValueNetOfAdjustments_label_en-US" xlink:label="lab_onit_TotalFairValueChangesInServicingLiabilityAtFairValueNetOfAdjustments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Fair Value Changes In Servicing Liability At Fair Value, Net Of Adjustments</link:label>
    <link:label id="lab_onit_TotalFairValueChangesInServicingLiabilityAtFairValueNetOfAdjustments_documentation_en-US" xlink:label="lab_onit_TotalFairValueChangesInServicingLiabilityAtFairValueNetOfAdjustments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total Fair Value Changes In Servicing Liability At Fair Value, Net Of Adjustments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_TotalFairValueChangesInServicingLiabilityAtFairValueNetOfAdjustments" xlink:href="onit-20260331.xsd#onit_TotalFairValueChangesInServicingLiabilityAtFairValueNetOfAdjustments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_TotalFairValueChangesInServicingLiabilityAtFairValueNetOfAdjustments" xlink:to="lab_onit_TotalFairValueChangesInServicingLiabilityAtFairValueNetOfAdjustments" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_TotalRealizedAndUnrealizedGainsAndLosses2Abstract_019cc591-a808-77fc-931f-af586c5df054_terseLabel_en-US" xlink:label="lab_onit_TotalRealizedAndUnrealizedGainsAndLosses2Abstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total realized and unrealized gains and (losses):</link:label>
    <link:label id="lab_onit_TotalRealizedAndUnrealizedGainsAndLosses2Abstract_label_en-US" xlink:label="lab_onit_TotalRealizedAndUnrealizedGainsAndLosses2Abstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total realized and unrealized gains and (losses) (2): [Abstract]</link:label>
    <link:label id="lab_onit_TotalRealizedAndUnrealizedGainsAndLosses2Abstract_documentation_en-US" xlink:label="lab_onit_TotalRealizedAndUnrealizedGainsAndLosses2Abstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_TotalRealizedAndUnrealizedGainsAndLosses2Abstract" xlink:href="onit-20260331.xsd#onit_TotalRealizedAndUnrealizedGainsAndLosses2Abstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_TotalRealizedAndUnrealizedGainsAndLosses2Abstract" xlink:to="lab_onit_TotalRealizedAndUnrealizedGainsAndLosses2Abstract" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_UnpaidPrincipalBalanceOfLoansTransferred_019cc591-a891-76a1-bb33-087fb8b7b7b8_terseLabel_en-US" xlink:label="lab_onit_UnpaidPrincipalBalanceOfLoansTransferred" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">UPB of loans transferred</link:label>
    <link:label id="lab_onit_UnpaidPrincipalBalanceOfLoansTransferred_label_en-US" xlink:label="lab_onit_UnpaidPrincipalBalanceOfLoansTransferred" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unpaid Principal Balance Of Loans Transferred</link:label>
    <link:label id="lab_onit_UnpaidPrincipalBalanceOfLoansTransferred_documentation_en-US" xlink:label="lab_onit_UnpaidPrincipalBalanceOfLoansTransferred" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Unpaid principal balance of forward loans transferred with servicing rights retained.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_UnpaidPrincipalBalanceOfLoansTransferred" xlink:href="onit-20260331.xsd#onit_UnpaidPrincipalBalanceOfLoansTransferred"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_UnpaidPrincipalBalanceOfLoansTransferred" xlink:to="lab_onit_UnpaidPrincipalBalanceOfLoansTransferred" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_OnityMortgageCorporationMember_019dd565-3493-756d-8ff7-af6b500eef32_terseLabel_en-US" xlink:label="lab_onit_OnityMortgageCorporationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OMC</link:label>
    <link:label id="lab_onit_OnityMortgageCorporationMember_label_en-US" xlink:label="lab_onit_OnityMortgageCorporationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Onity Mortgage Corporation [Member]</link:label>
    <link:label id="lab_onit_OnityMortgageCorporationMember_documentation_en-US" xlink:label="lab_onit_OnityMortgageCorporationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Onity Mortgage Corporation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OnityMortgageCorporationMember" xlink:href="onit-20260331.xsd#onit_OnityMortgageCorporationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_OnityMortgageCorporationMember" xlink:to="lab_onit_OnityMortgageCorporationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets_019cc591-a808-75f7-986e-237936f1d44d_totalLabel_en-US" xlink:label="lab_us-gaap_ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total ancillary income</link:label>
    <link:label id="lab_us-gaap_ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets_label_en-US" xlink:label="lab_us-gaap_ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets" xlink:to="lab_us-gaap_ContractuallySpecifiedServicingFeesLateFeesAndAncillaryFeesEarnedInExchangeForServicingFinancialAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AwardTmgDiscLineItems_label_en-US" xlink:label="lab_ecd_AwardTmgDiscLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Timing Disclosures [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AwardTmgDiscLineItems" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AwardTmgDiscLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AwardTmgDiscLineItems" xlink:to="lab_ecd_AwardTmgDiscLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToLoansHeldForSaleAtFairValue_019dd987-5a3c-72d8-91fd-9eee283a1fc5_terseLabel_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToLoansHeldForSaleAtFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans held for sale, at fair value</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToLoansHeldForSaleAtFairValue_label_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToLoansHeldForSaleAtFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Transfers To Loans Held For Sale, At Fair Value</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToLoansHeldForSaleAtFairValue_documentation_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToLoansHeldForSaleAtFairValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Transfers To Loans Held For Sale, At Fair Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForSaleReverseMortgagesTransfersToLoansHeldForSaleAtFairValue" xlink:href="onit-20260331.xsd#onit_LoansHeldForSaleReverseMortgagesTransfersToLoansHeldForSaleAtFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForSaleReverseMortgagesTransfersToLoansHeldForSaleAtFairValue" xlink:to="lab_onit_LoansHeldForSaleReverseMortgagesTransfersToLoansHeldForSaleAtFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ServicingAssetAtAmortizedValueAmortization1_019cc591-a891-7b67-869f-0cd3159e844c_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetAtAmortizedValueAmortization1" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Pledged MSR liability expense</link:label>
    <link:label id="lab_us-gaap_ServicingAssetAtAmortizedValueAmortization1_label_en-US" xlink:label="lab_us-gaap_ServicingAssetAtAmortizedValueAmortization1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset at Amortized Cost, Amortization</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtAmortizedValueAmortization1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtAmortizedValueAmortization1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingAssetAtAmortizedValueAmortization1" xlink:to="lab_us-gaap_ServicingAssetAtAmortizedValueAmortization1" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_019cc591-a808-7606-8cf8-60bdbe8674fb_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stockholders' Equity</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityNoteDisclosureTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:to="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale_019cc591-a891-7bff-ac95-c502a9100c33_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sales</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale_019cc591-a891-7c12-bdb3-0f0fa161b121_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Mortgage Loans Held-for-sale</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale, Loan, Mortgage, Held-for-Sale</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale" xlink:to="lab_us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetIncomeLoss_019cc591-a891-7437-927b-a0da4f41708c_totalLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net income</link:label>
    <link:label id="lab_us-gaap_NetIncomeLoss_019cc591-a891-7bfb-80a1-1d4902b86b91_verboseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net income</link:label>
    <link:label id="lab_us-gaap_NetIncomeLoss_label_en-US" xlink:label="lab_us-gaap_NetIncomeLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss) Attributable to Parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLoss" xlink:to="lab_us-gaap_NetIncomeLoss" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsequentEventTable_019cc591-a75e-7b8d-8cba-be1ab71b3c43_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event [Table]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventTable_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTable" xlink:to="lab_us-gaap_SubsequentEventTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromCollectionOfLoansReceivable_019cc591-a808-79b6-a643-75e5a6b5ae64_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromCollectionOfLoansReceivable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from Collection of Loans Receivable</link:label>
    <link:label id="lab_us-gaap_ProceedsFromCollectionOfLoansReceivable_label_en-US" xlink:label="lab_us-gaap_ProceedsFromCollectionOfLoansReceivable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Collection of Loans Receivable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromCollectionOfLoansReceivable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromCollectionOfLoansReceivable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromCollectionOfLoansReceivable" xlink:to="lab_us-gaap_ProceedsFromCollectionOfLoansReceivable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_019cc591-a75f-7053-bb7f-faefc5dc484f_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Effective Income Tax Rate Reconciliation</link:label>
    <link:label id="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:to="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SegmentReportingInformationLineItems_019cc591-a808-7330-9841-faf4421a05d5_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingInformationLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segment Reporting Information [Line Items]</link:label>
    <link:label id="lab_us-gaap_SegmentReportingInformationLineItems_label_en-US" xlink:label="lab_us-gaap_SegmentReportingInformationLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment Reporting Information [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems" xlink:to="lab_us-gaap_SegmentReportingInformationLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_019cc591-a891-7ba9-b2a2-08d4303eb557_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Repurchase of common stock</link:label>
    <link:label id="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_label_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for Repurchase of Common Stock</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:to="lab_us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TrdArrAdoptionDate_terseLabel_en-US" xlink:label="lab_ecd_TrdArrAdoptionDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adoption Date</link:label>
    <link:label id="lab_ecd_TrdArrAdoptionDate_label_en-US" xlink:label="lab_ecd_TrdArrAdoptionDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Arrangement Adoption Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrAdoptionDate" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_TrdArrAdoptionDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TrdArrAdoptionDate" xlink:to="lab_ecd_TrdArrAdoptionDate" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_DebtInstrumentCovenantComplianceConsolidatedTangibleNetWorthatPeriodEnd_019cc591-a808-70a0-a04f-6ebe9536ea8e_terseLabel_en-US" xlink:label="lab_onit_DebtInstrumentCovenantComplianceConsolidatedTangibleNetWorthatPeriodEnd" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Covenant compliance, consolidated tangible net worth at period end</link:label>
    <link:label id="lab_onit_DebtInstrumentCovenantComplianceConsolidatedTangibleNetWorthatPeriodEnd_label_en-US" xlink:label="lab_onit_DebtInstrumentCovenantComplianceConsolidatedTangibleNetWorthatPeriodEnd" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Covenant Compliance, Consolidated Tangible Net Worth at Period End</link:label>
    <link:label id="lab_onit_DebtInstrumentCovenantComplianceConsolidatedTangibleNetWorthatPeriodEnd_documentation_en-US" xlink:label="lab_onit_DebtInstrumentCovenantComplianceConsolidatedTangibleNetWorthatPeriodEnd" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the amount of consolidated tangible net worth requirement as part of the most restrictive covenant requirement.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_DebtInstrumentCovenantComplianceConsolidatedTangibleNetWorthatPeriodEnd" xlink:href="onit-20260331.xsd#onit_DebtInstrumentCovenantComplianceConsolidatedTangibleNetWorthatPeriodEnd"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_DebtInstrumentCovenantComplianceConsolidatedTangibleNetWorthatPeriodEnd" xlink:to="lab_onit_DebtInstrumentCovenantComplianceConsolidatedTangibleNetWorthatPeriodEnd" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MeasurementInputExpectedTermMember_019cc591-a75f-7a2f-bfa1-57f1ba6a49ab_terseLabel_en-US" xlink:label="lab_us-gaap_MeasurementInputExpectedTermMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Life in years</link:label>
    <link:label id="lab_us-gaap_MeasurementInputExpectedTermMember_label_en-US" xlink:label="lab_us-gaap_MeasurementInputExpectedTermMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Input, Expected Term [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputExpectedTermMember" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputExpectedTermMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MeasurementInputExpectedTermMember" xlink:to="lab_us-gaap_MeasurementInputExpectedTermMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesLoansHeldForSaleAtFairValue_019cc591-a891-75ed-a86f-cd8c857d48ad_negatedTerseLabel_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesLoansHeldForSaleAtFairValue" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Loans held for sale, at fair value</link:label>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesLoansHeldForSaleAtFairValue_label_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesLoansHeldForSaleAtFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Investment, Reverse Mortgages, Loans Held For Sale, At Fair Value</link:label>
    <link:label id="lab_onit_LoansHeldForInvestmentReverseMortgagesLoansHeldForSaleAtFairValue_documentation_en-US" xlink:label="lab_onit_LoansHeldForInvestmentReverseMortgagesLoansHeldForSaleAtFairValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of loans held for investment, reverse mortgages transferred to loans held for sale, fair value during the period.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForInvestmentReverseMortgagesLoansHeldForSaleAtFairValue" xlink:href="onit-20260331.xsd#onit_LoansHeldForInvestmentReverseMortgagesLoansHeldForSaleAtFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForInvestmentReverseMortgagesLoansHeldForSaleAtFairValue" xlink:to="lab_onit_LoansHeldForInvestmentReverseMortgagesLoansHeldForSaleAtFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_019cc591-a892-7984-93ac-3e3d1c9794dd_terseLabel_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retained earnings</link:label>
    <link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retained Earnings (Accumulated Deficit)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RetainedEarningsAccumulatedDeficit" xlink:to="lab_us-gaap_RetainedEarningsAccumulatedDeficit" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember_terseLabel_en-US" xlink:label="lab_ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested</link:label>
    <link:label id="lab_ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember_label_en-US" xlink:label="lab_ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember" xlink:to="lab_ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_PledgedMSRLiabilityExpenseBenchmarkMember_019cc591-a75f-7a6c-a581-97cce04c422e_terseLabel_en-US" xlink:label="lab_onit_PledgedMSRLiabilityExpenseBenchmarkMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pledged MSR Liability Expense Benchmark</link:label>
    <link:label id="lab_onit_PledgedMSRLiabilityExpenseBenchmarkMember_label_en-US" xlink:label="lab_onit_PledgedMSRLiabilityExpenseBenchmarkMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pledged MSR Liability Expense Benchmark [Member]</link:label>
    <link:label id="lab_onit_PledgedMSRLiabilityExpenseBenchmarkMember_documentation_en-US" xlink:label="lab_onit_PledgedMSRLiabilityExpenseBenchmarkMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Pledged MSR Liability Expense Benchmark</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_PledgedMSRLiabilityExpenseBenchmarkMember" xlink:href="onit-20260331.xsd#onit_PledgedMSRLiabilityExpenseBenchmarkMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_PledgedMSRLiabilityExpenseBenchmarkMember" xlink:to="lab_onit_PledgedMSRLiabilityExpenseBenchmarkMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_SubservicingClientOneMember_019dd4f3-ae3c-7c5f-9747-cfda9fd53e38_terseLabel_en-US" xlink:label="lab_onit_SubservicingClientOneMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subservicing Client One</link:label>
    <link:label id="lab_onit_SubservicingClientOneMember_label_en-US" xlink:label="lab_onit_SubservicingClientOneMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subservicing Client One [Member]</link:label>
    <link:label id="lab_onit_SubservicingClientOneMember_documentation_en-US" xlink:label="lab_onit_SubservicingClientOneMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Subservicing Client One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_SubservicingClientOneMember" xlink:href="onit-20260331.xsd#onit_SubservicingClientOneMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_SubservicingClientOneMember" xlink:to="lab_onit_SubservicingClientOneMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions_019cc591-a891-75bc-a3c1-e88d87ed7619_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Changes in valuation inputs or assumptions</link:label>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions_label_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset at Fair Value, Changes in Fair Value Resulting from Changes in Valuation Inputs or Changes in Assumptions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions" xlink:to="lab_us-gaap_ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsequentEventTypeDomain_019dd4ef-3527-7989-92a1-5368aa2de25b_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Domain]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventTypeDomain_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTypeDomain" xlink:to="lab_us-gaap_SubsequentEventTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember_terseLabel_en-US" xlink:label="lab_ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table</link:label>
    <link:label id="lab_ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember_label_en-US" xlink:label="lab_ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember" xlink:to="lab_ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestsContinuedToBeHeldByTransferorFairValue_019cc591-a808-76fa-b147-b9f7cb3a6b83_terseLabel_en-US" xlink:label="lab_us-gaap_InterestsContinuedToBeHeldByTransferorFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Carrying value of assets</link:label>
    <link:label id="lab_us-gaap_InterestsContinuedToBeHeldByTransferorFairValue_label_en-US" xlink:label="lab_us-gaap_InterestsContinuedToBeHeldByTransferorFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Transferor's Interests in Transferred Financial Assets, Fair Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestsContinuedToBeHeldByTransferorFairValue" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestsContinuedToBeHeldByTransferorFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestsContinuedToBeHeldByTransferorFairValue" xlink:to="lab_us-gaap_InterestsContinuedToBeHeldByTransferorFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_OtherNonoperatingIncomeExpense_019cc591-a808-748e-87e0-4fb2e8025ad2_terseLabel_en-US" xlink:label="lab_us-gaap_OtherNonoperatingIncomeExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other, net</link:label>
    <link:label id="lab_us-gaap_OtherNonoperatingIncomeExpense_label_en-US" xlink:label="lab_us-gaap_OtherNonoperatingIncomeExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Nonoperating Income (Expense)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpense" xlink:to="lab_us-gaap_OtherNonoperatingIncomeExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_StatementTable_019cc591-a891-71b6-a463-afc3448907be_terseLabel_en-US" xlink:label="lab_us-gaap_StatementTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement [Table]</link:label>
    <link:label id="lab_us-gaap_StatementTable_label_en-US" xlink:label="lab_us-gaap_StatementTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementTable" xlink:to="lab_us-gaap_StatementTable" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_OLITAssetBackedNotesSeries2026HB1March2039Member_019dd4f7-7931-7e4e-a459-cb0212c98832_terseLabel_en-US" xlink:label="lab_onit_OLITAssetBackedNotesSeries2026HB1March2039Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OLIT Asset-Backed Notes, Series 2026-HB1 | March 2039</link:label>
    <link:label id="lab_onit_OLITAssetBackedNotesSeries2026HB1March2039Member_label_en-US" xlink:label="lab_onit_OLITAssetBackedNotesSeries2026HB1March2039Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">OLIT Asset-Backed Notes, Series 2026-HB1 | March 2039 [Member]</link:label>
    <link:label id="lab_onit_OLITAssetBackedNotesSeries2026HB1March2039Member_documentation_en-US" xlink:label="lab_onit_OLITAssetBackedNotesSeries2026HB1March2039Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">OLIT Asset-Backed Notes, Series 2026-HB1 | March 2039</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OLITAssetBackedNotesSeries2026HB1March2039Member" xlink:href="onit-20260331.xsd#onit_OLITAssetBackedNotesSeries2026HB1March2039Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_OLITAssetBackedNotesSeries2026HB1March2039Member" xlink:to="lab_onit_OLITAssetBackedNotesSeries2026HB1March2039Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019cc591-a891-7586-a71a-636eacc2d097_terseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustments to reconcile net income to net cash used in operating activities:</link:label>
    <link:label id="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_label_en-US" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019cc591-a808-7d51-8378-f759ee64ded9_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash flows from financing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InterestAndFeeIncomeOtherLoans_019cc591-a808-737c-9b91-184c6be6d315_terseLabel_en-US" xlink:label="lab_us-gaap_InterestAndFeeIncomeOtherLoans" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loan fees and other</link:label>
    <link:label id="lab_us-gaap_InterestAndFeeIncomeOtherLoans_label_en-US" xlink:label="lab_us-gaap_InterestAndFeeIncomeOtherLoans" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest and Fee Income, Other Loans</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndFeeIncomeOtherLoans" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndFeeIncomeOtherLoans"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestAndFeeIncomeOtherLoans" xlink:to="lab_us-gaap_InterestAndFeeIncomeOtherLoans" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromLoanAndLeaseOriginationsAndPrincipalCollections1_019cc591-a891-765b-8327-064f223eb4ea_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromLoanAndLeaseOriginationsAndPrincipalCollections1" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Principal collections</link:label>
    <link:label id="lab_us-gaap_ProceedsFromLoanAndLeaseOriginationsAndPrincipalCollections1_label_en-US" xlink:label="lab_us-gaap_ProceedsFromLoanAndLeaseOriginationsAndPrincipalCollections1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Loan and Lease Originations and Principal Collections</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLoanAndLeaseOriginationsAndPrincipalCollections1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromLoanAndLeaseOriginationsAndPrincipalCollections1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromLoanAndLeaseOriginationsAndPrincipalCollections1" xlink:to="lab_us-gaap_ProceedsFromLoanAndLeaseOriginationsAndPrincipalCollections1" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_019cc591-a75e-7c9e-beba-d83fe4d51c64_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Reconciliation of Changes in Fair Value of Level 3 Assets and Liabilities</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:to="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_AllAdjToCompMember_terseLabel_en-US" xlink:label="lab_ecd_AllAdjToCompMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">All Adjustments to Compensation</link:label>
    <link:label id="lab_ecd_AllAdjToCompMember_label_en-US" xlink:label="lab_ecd_AllAdjToCompMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">All Adjustments to Compensation [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllAdjToCompMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AllAdjToCompMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_AllAdjToCompMember" xlink:to="lab_ecd_AllAdjToCompMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_TransferredMSRsESSFinancingLiabilities_019dd4d7-153f-76c4-8a26-080b2709488c_terseLabel_en-US" xlink:label="lab_onit_TransferredMSRsESSFinancingLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Transferred MSRs, ESS Financing Liabilities</link:label>
    <link:label id="lab_onit_TransferredMSRsESSFinancingLiabilities_label_en-US" xlink:label="lab_onit_TransferredMSRsESSFinancingLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Transferred MSRs, ESS Financing Liabilities</link:label>
    <link:label id="lab_onit_TransferredMSRsESSFinancingLiabilities_documentation_en-US" xlink:label="lab_onit_TransferredMSRsESSFinancingLiabilities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Transferred MSRs, ESS Financing Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_TransferredMSRsESSFinancingLiabilities" xlink:href="onit-20260331.xsd#onit_TransferredMSRsESSFinancingLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_TransferredMSRsESSFinancingLiabilities" xlink:to="lab_onit_TransferredMSRsESSFinancingLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_AmendmentFlag_019cc591-a808-736e-b2d4-9ffab113fad6_terseLabel_en-US" xlink:label="lab_dei_AmendmentFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amendment Flag</link:label>
    <link:label id="lab_dei_AmendmentFlag_label_en-US" xlink:label="lab_dei_AmendmentFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amendment Flag</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_AmendmentFlag" xlink:to="lab_dei_AmendmentFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AgencyMSRFinancingFacilityRevolvingLoanMember_019cc591-a808-7246-aaaa-8593161e52eb_terseLabel_en-US" xlink:label="lab_onit_AgencyMSRFinancingFacilityRevolvingLoanMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Agency MSR Financing Facility Revolving Loan</link:label>
    <link:label id="lab_onit_AgencyMSRFinancingFacilityRevolvingLoanMember_label_en-US" xlink:label="lab_onit_AgencyMSRFinancingFacilityRevolvingLoanMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Agency MSR Financing Facility Revolving Loan [Member]</link:label>
    <link:label id="lab_onit_AgencyMSRFinancingFacilityRevolvingLoanMember_documentation_en-US" xlink:label="lab_onit_AgencyMSRFinancingFacilityRevolvingLoanMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Agency MSR Financing Facility Revolving Loan.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AgencyMSRFinancingFacilityRevolvingLoanMember" xlink:href="onit-20260331.xsd#onit_AgencyMSRFinancingFacilityRevolvingLoanMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AgencyMSRFinancingFacilityRevolvingLoanMember" xlink:to="lab_onit_AgencyMSRFinancingFacilityRevolvingLoanMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_TransfersAndServicingAbstract_019cc591-a75f-7c99-b321-86893687fafd_terseLabel_en-US" xlink:label="lab_us-gaap_TransfersAndServicingAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Transfers and Servicing [Abstract]</link:label>
    <link:label id="lab_us-gaap_TransfersAndServicingAbstract_label_en-US" xlink:label="lab_us-gaap_TransfersAndServicingAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Transfers and Servicing [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TransfersAndServicingAbstract" xlink:to="lab_us-gaap_TransfersAndServicingAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_TrdArrTerminationDate_terseLabel_en-US" xlink:label="lab_ecd_TrdArrTerminationDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Termination Date</link:label>
    <link:label id="lab_ecd_TrdArrTerminationDate_label_en-US" xlink:label="lab_ecd_TrdArrTerminationDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Arrangement Termination Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_TrdArrTerminationDate" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_TrdArrTerminationDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_TrdArrTerminationDate" xlink:to="lab_ecd_TrdArrTerminationDate" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_InsiderTrdPoliciesProcAdoptedFlag_terseLabel_en-US" xlink:label="lab_ecd_InsiderTrdPoliciesProcAdoptedFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Insider Trading Policies and Procedures Adopted</link:label>
    <link:label id="lab_ecd_InsiderTrdPoliciesProcAdoptedFlag_label_en-US" xlink:label="lab_ecd_InsiderTrdPoliciesProcAdoptedFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Insider Trading Policies and Procedures Adopted [Flag]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_InsiderTrdPoliciesProcAdoptedFlag" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_InsiderTrdPoliciesProcAdoptedFlag"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_InsiderTrdPoliciesProcAdoptedFlag" xlink:to="lab_ecd_InsiderTrdPoliciesProcAdoptedFlag" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingAgreementRenewalTerm_019cc591-a808-712c-bcf5-2c16dfddcac7_terseLabel_en-US" xlink:label="lab_onit_ServicingAgreementRenewalTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Automatic renewal term</link:label>
    <link:label id="lab_onit_ServicingAgreementRenewalTerm_label_en-US" xlink:label="lab_onit_ServicingAgreementRenewalTerm" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Agreement, Renewal Term</link:label>
    <link:label id="lab_onit_ServicingAgreementRenewalTerm_documentation_en-US" xlink:label="lab_onit_ServicingAgreementRenewalTerm" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing Agreement, Renewal Term</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingAgreementRenewalTerm" xlink:href="onit-20260331.xsd#onit_ServicingAgreementRenewalTerm"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingAgreementRenewalTerm" xlink:to="lab_onit_ServicingAgreementRenewalTerm" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ReceivableTypeDomain_019cc591-a75e-716e-b75b-7b993f657510_terseLabel_en-US" xlink:label="lab_us-gaap_ReceivableTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Receivable Type [Domain]</link:label>
    <link:label id="lab_us-gaap_ReceivableTypeDomain_label_en-US" xlink:label="lab_us-gaap_ReceivableTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Receivable [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReceivableTypeDomain" xlink:to="lab_us-gaap_ReceivableTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesFairValueChanges_019dd988-9a71-7119-b216-5cace23ac488_terseLabel_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesFairValueChanges" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair value gains (losses) included in earnings (2)</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesFairValueChanges_label_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesFairValueChanges" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Fair Value Changes</link:label>
    <link:label id="lab_onit_LoansHeldForSaleReverseMortgagesFairValueChanges_documentation_en-US" xlink:label="lab_onit_LoansHeldForSaleReverseMortgagesFairValueChanges" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Held For Sale, Reverse Mortgages, Fair Value Changes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_LoansHeldForSaleReverseMortgagesFairValueChanges" xlink:href="onit-20260331.xsd#onit_LoansHeldForSaleReverseMortgagesFairValueChanges"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_LoansHeldForSaleReverseMortgagesFairValueChanges" xlink:to="lab_onit_LoansHeldForSaleReverseMortgagesFairValueChanges" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019cc591-a808-7849-8dda-a5fe36afa929_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Basic (in shares)</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019cc591-a808-7e4e-81c2-c1ac7bc28ed4_verboseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Weighted average shares of common stock (in shares)</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average Number of Shares Outstanding, Basic</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:to="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AdvancesPaymentsonBehalfofBorrowerAssetAcquisitions_019cc591-a892-7608-bb23-fd5af3c4db60_terseLabel_en-US" xlink:label="lab_onit_AdvancesPaymentsonBehalfofBorrowerAssetAcquisitions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Acquisition of advances in connection with the purchase of MSRs</link:label>
    <link:label id="lab_onit_AdvancesPaymentsonBehalfofBorrowerAssetAcquisitions_label_en-US" xlink:label="lab_onit_AdvancesPaymentsonBehalfofBorrowerAssetAcquisitions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advances Payments on Behalf of Borrower Asset Acquisitions</link:label>
    <link:label id="lab_onit_AdvancesPaymentsonBehalfofBorrowerAssetAcquisitions_documentation_en-US" xlink:label="lab_onit_AdvancesPaymentsonBehalfofBorrowerAssetAcquisitions" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Advances payments on behalf of borrower asset acquisitions.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AdvancesPaymentsonBehalfofBorrowerAssetAcquisitions" xlink:href="onit-20260331.xsd#onit_AdvancesPaymentsonBehalfofBorrowerAssetAcquisitions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AdvancesPaymentsonBehalfofBorrowerAssetAcquisitions" xlink:to="lab_onit_AdvancesPaymentsonBehalfofBorrowerAssetAcquisitions" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_019cc591-a75f-7215-8de7-c6845775b36f_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Reconciliation of Calculation of Basic Loss per Share to Diluted Loss per Share</link:label>
    <link:label id="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_label_en-US" xlink:label="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:to="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_NonAgencyMember_019cc591-a75f-777d-a238-a66b29ba0aff_terseLabel_en-US" xlink:label="lab_onit_NonAgencyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-Agency</link:label>
    <link:label id="lab_onit_NonAgencyMember_label_en-US" xlink:label="lab_onit_NonAgencyMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-Agency [Member]</link:label>
    <link:label id="lab_onit_NonAgencyMember_documentation_en-US" xlink:label="lab_onit_NonAgencyMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Non-Agency</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_NonAgencyMember" xlink:href="onit-20260331.xsd#onit_NonAgencyMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_NonAgencyMember" xlink:to="lab_onit_NonAgencyMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SubsequentEventsAbstract_019cc591-a808-7252-84e2-6d817fa06a92_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Events [Abstract]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventsAbstract_label_en-US" xlink:label="lab_us-gaap_SubsequentEventsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Events [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventsAbstract" xlink:to="lab_us-gaap_SubsequentEventsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_SegmentReportingAbstract_019cc591-a891-71f8-8442-45bebb6d354b_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segment Reporting [Abstract]</link:label>
    <link:label id="lab_us-gaap_SegmentReportingAbstract_label_en-US" xlink:label="lab_us-gaap_SegmentReportingAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment Reporting [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingAbstract" xlink:to="lab_us-gaap_SegmentReportingAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtDisclosureAbstract_019cc591-a891-7bd7-9750-bb822f9e73c6_terseLabel_en-US" xlink:label="lab_us-gaap_DebtDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Disclosure [Abstract]</link:label>
    <link:label id="lab_us-gaap_DebtDisclosureAbstract_label_en-US" xlink:label="lab_us-gaap_DebtDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Disclosure [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtDisclosureAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtDisclosureAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtDisclosureAbstract" xlink:to="lab_us-gaap_DebtDisclosureAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_MatchFundedLiabiltiesMember_019cc591-a892-7e01-b6e4-3b30959e5e12_terseLabel_en-US" xlink:label="lab_onit_MatchFundedLiabiltiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advance match funded liabilities</link:label>
    <link:label id="lab_onit_MatchFundedLiabiltiesMember_label_en-US" xlink:label="lab_onit_MatchFundedLiabiltiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Match Funded Liabilties [Member]</link:label>
    <link:label id="lab_onit_MatchFundedLiabiltiesMember_documentation_en-US" xlink:label="lab_onit_MatchFundedLiabiltiesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Specific interest-bearing liability.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_MatchFundedLiabiltiesMember" xlink:href="onit-20260331.xsd#onit_MatchFundedLiabiltiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_MatchFundedLiabiltiesMember" xlink:to="lab_onit_MatchFundedLiabiltiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ScenarioUnspecifiedDomain_019dd4f3-32c1-7be5-adc1-de3efb6cb20f_terseLabel_en-US" xlink:label="lab_srt_ScenarioUnspecifiedDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Scenario [Domain]</link:label>
    <link:label id="lab_srt_ScenarioUnspecifiedDomain_label_en-US" xlink:label="lab_srt_ScenarioUnspecifiedDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Scenario [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ScenarioUnspecifiedDomain" xlink:to="lab_srt_ScenarioUnspecifiedDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CostsAndExpensesAbstract_019cc591-a808-7a45-bc85-db478bdd629b_terseLabel_en-US" xlink:label="lab_us-gaap_CostsAndExpensesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating expenses</link:label>
    <link:label id="lab_us-gaap_CostsAndExpensesAbstract_label_en-US" xlink:label="lab_us-gaap_CostsAndExpensesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Costs and Expenses [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpensesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostsAndExpensesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CostsAndExpensesAbstract" xlink:to="lab_us-gaap_CostsAndExpensesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs_019cc591-a891-7a5b-b9a9-fca19b2371d6_negatedLabel_en-US" xlink:label="lab_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Charge-offs and other, net</link:label>
    <link:label id="lab_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs_label_en-US" xlink:label="lab_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounts Receivable, Allowance for Credit Loss, Writeoff</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs" xlink:to="lab_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_ProceedsFromRepaymentsOfLinesOfCredit_019cc591-a75f-7080-9f26-315fd84e6972_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromRepaymentsOfLinesOfCredit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from mortgage warehouse facilities, net</link:label>
    <link:label id="lab_us-gaap_ProceedsFromRepaymentsOfLinesOfCredit_label_en-US" xlink:label="lab_us-gaap_ProceedsFromRepaymentsOfLinesOfCredit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from (Repayments of) Lines of Credit</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfLinesOfCredit" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromRepaymentsOfLinesOfCredit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromRepaymentsOfLinesOfCredit" xlink:to="lab_us-gaap_ProceedsFromRepaymentsOfLinesOfCredit" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DebtInstrumentUnamortizedDiscount_019cc591-a891-77f4-b935-8b21135a4f1d_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnamortizedDiscount" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Discount</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentUnamortizedDiscount_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnamortizedDiscount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Unamortized Discount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentUnamortizedDiscount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentUnamortizedDiscount" xlink:to="lab_us-gaap_DebtInstrumentUnamortizedDiscount" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt_terseLabel_en-US" xlink:label="lab_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Forgone Recovery due to Expense of Enforcement, Amount</link:label>
    <link:label id="lab_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt_label_en-US" xlink:label="lab_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Forgone Recovery due to Expense of Enforcement, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt" xlink:to="lab_ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CommonStockParOrStatedValuePerShare_019cc591-a75f-7470-95d5-d6790fd735aa_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockParOrStatedValuePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock, par value per share (in usd per share)</link:label>
    <link:label id="lab_us-gaap_CommonStockParOrStatedValuePerShare_label_en-US" xlink:label="lab_us-gaap_CommonStockParOrStatedValuePerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Par or Stated Value Per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockParOrStatedValuePerShare" xlink:to="lab_us-gaap_CommonStockParOrStatedValuePerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ConsolidatedEntitiesAxis_019cc591-a808-77b5-84fe-de897bb46c3e_terseLabel_en-US" xlink:label="lab_srt_ConsolidatedEntitiesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidated Entities [Axis]</link:label>
    <link:label id="lab_srt_ConsolidatedEntitiesAxis_label_en-US" xlink:label="lab_srt_ConsolidatedEntitiesAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidated Entities [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidatedEntitiesAxis" xlink:to="lab_srt_ConsolidatedEntitiesAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_PercentageOfLoanTransferredThroughSecuritizationSixtyDaysOrMorePastDue_019cc591-a891-76ac-b9e5-81339696724a_terseLabel_en-US" xlink:label="lab_onit_PercentageOfLoanTransferredThroughSecuritizationSixtyDaysOrMorePastDue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of loan transferred through securitization 60 days or more past due</link:label>
    <link:label id="lab_onit_PercentageOfLoanTransferredThroughSecuritizationSixtyDaysOrMorePastDue_label_en-US" xlink:label="lab_onit_PercentageOfLoanTransferredThroughSecuritizationSixtyDaysOrMorePastDue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage Of Loan Transferred Through Securitization Sixty Days Or More Past Due</link:label>
    <link:label id="lab_onit_PercentageOfLoanTransferredThroughSecuritizationSixtyDaysOrMorePastDue_documentation_en-US" xlink:label="lab_onit_PercentageOfLoanTransferredThroughSecuritizationSixtyDaysOrMorePastDue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Percentage of loan transferred through securitization 60 days or more past due.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_PercentageOfLoanTransferredThroughSecuritizationSixtyDaysOrMorePastDue" xlink:href="onit-20260331.xsd#onit_PercentageOfLoanTransferredThroughSecuritizationSixtyDaysOrMorePastDue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_PercentageOfLoanTransferredThroughSecuritizationSixtyDaysOrMorePastDue" xlink:to="lab_onit_PercentageOfLoanTransferredThroughSecuritizationSixtyDaysOrMorePastDue" xlink:type="arc" order="1"/>
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    <link:label id="lab_onit_MaximumClaimAmountGreaterThan92AndLessThan95Member_label_en-US" xlink:label="lab_onit_MaximumClaimAmountGreaterThan92AndLessThan95Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum Claim Amount, Greater than 92% and Less Than 95% [Member]</link:label>
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    <link:label id="lab_us-gaap_OccupancyNet_label_en-US" xlink:label="lab_us-gaap_OccupancyNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Occupancy, Net</link:label>
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    <link:label id="lab_onit_OtherReceivablesGross_documentation_en-US" xlink:label="lab_onit_OtherReceivablesGross" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Receivables, Gross</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OtherReceivablesGross" xlink:href="onit-20260331.xsd#onit_OtherReceivablesGross"/>
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    <link:label id="lab_onit_FairValueMortgageServicingRightsMember_documentation_en-US" xlink:label="lab_onit_FairValueMortgageServicingRightsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fair Value Mortgage Servicing Rights [Member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestRateLockCommitmentsMember" xlink:to="lab_us-gaap_InterestRateLockCommitmentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_OwnedMortgageServicingRightsMember_019cc591-a891-75ce-a026-63b8d669546b_terseLabel_en-US" xlink:label="lab_onit_OwnedMortgageServicingRightsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Owned MSRs</link:label>
    <link:label id="lab_onit_OwnedMortgageServicingRightsMember_label_en-US" xlink:label="lab_onit_OwnedMortgageServicingRightsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Owned Mortgage Servicing Rights [Member]</link:label>
    <link:label id="lab_onit_OwnedMortgageServicingRightsMember_documentation_en-US" xlink:label="lab_onit_OwnedMortgageServicingRightsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Owned mortgage servicing rights.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_OwnedMortgageServicingRightsMember" xlink:href="onit-20260331.xsd#onit_OwnedMortgageServicingRightsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_OwnedMortgageServicingRightsMember" xlink:to="lab_onit_OwnedMortgageServicingRightsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_PnsnAdjsPrrSvcCstMember_terseLabel_en-US" xlink:label="lab_ecd_PnsnAdjsPrrSvcCstMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pension Adjustments Prior Service Cost</link:label>
    <link:label id="lab_ecd_PnsnAdjsPrrSvcCstMember_label_en-US" xlink:label="lab_ecd_PnsnAdjsPrrSvcCstMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pension Adjustments Prior Service Cost [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_PnsnAdjsPrrSvcCstMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_PnsnAdjsPrrSvcCstMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_PnsnAdjsPrrSvcCstMember" xlink:to="lab_ecd_PnsnAdjsPrrSvcCstMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_AncillaryAndOtherSettlement_019cc591-a808-7234-bc2d-fcb88f2461c3_terseLabel_en-US" xlink:label="lab_onit_AncillaryAndOtherSettlement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ancillary and other settlement</link:label>
    <link:label id="lab_onit_AncillaryAndOtherSettlement_label_en-US" xlink:label="lab_onit_AncillaryAndOtherSettlement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ancillary and other settlement</link:label>
    <link:label id="lab_onit_AncillaryAndOtherSettlement_documentation_en-US" xlink:label="lab_onit_AncillaryAndOtherSettlement" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ancillary fee/income and other settlement (incl. expense reimbursement)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_AncillaryAndOtherSettlement" xlink:href="onit-20260331.xsd#onit_AncillaryAndOtherSettlement"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_AncillaryAndOtherSettlement" xlink:to="lab_onit_AncillaryAndOtherSettlement" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_AssetAtFairValueChangesInFairValueResultingFromChangesInAssumptions_019cc591-a808-7f39-96ed-7a60c4fbb684_terseLabel_en-US" xlink:label="lab_us-gaap_AssetAtFairValueChangesInFairValueResultingFromChangesInAssumptions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Asset at Fair Value, Changes in Fair Value Resulting from Changes in Assumptions</link:label>
    <link:label id="lab_us-gaap_AssetAtFairValueChangesInFairValueResultingFromChangesInAssumptions_label_en-US" xlink:label="lab_us-gaap_AssetAtFairValueChangesInFairValueResultingFromChangesInAssumptions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Asset at Fair Value, Changes in Fair Value Resulting from Changes in Assumptions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAtFairValueChangesInFairValueResultingFromChangesInAssumptions" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetAtFairValueChangesInFairValueResultingFromChangesInAssumptions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetAtFairValueChangesInFairValueResultingFromChangesInAssumptions" xlink:to="lab_us-gaap_AssetAtFairValueChangesInFairValueResultingFromChangesInAssumptions" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_MtrlTermsOfTrdArrTextBlock_terseLabel_en-US" xlink:label="lab_ecd_MtrlTermsOfTrdArrTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Material Terms of Trading Arrangement</link:label>
    <link:label id="lab_ecd_MtrlTermsOfTrdArrTextBlock_label_en-US" xlink:label="lab_ecd_MtrlTermsOfTrdArrTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Material Terms of Trading Arrangement [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_MtrlTermsOfTrdArrTextBlock" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_MtrlTermsOfTrdArrTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_MtrlTermsOfTrdArrTextBlock" xlink:to="lab_ecd_MtrlTermsOfTrdArrTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_LoansReceivableHeldForSaleNetReconciliationToCashFlowRollForward_019cc591-a891-706e-8b5b-6c3ef960702b_terseLabel_en-US" xlink:label="lab_us-gaap_LoansReceivableHeldForSaleNetReconciliationToCashFlowRollForward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reverse Mortgage Loans (1)</link:label>
    <link:label id="lab_us-gaap_LoansReceivableHeldForSaleNetReconciliationToCashFlowRollForward_label_en-US" xlink:label="lab_us-gaap_LoansReceivableHeldForSaleNetReconciliationToCashFlowRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance, Reconciliation to Cash Flow [Roll Forward]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansReceivableHeldForSaleNetReconciliationToCashFlowRollForward" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansReceivableHeldForSaleNetReconciliationToCashFlowRollForward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansReceivableHeldForSaleNetReconciliationToCashFlowRollForward" xlink:to="lab_us-gaap_LoansReceivableHeldForSaleNetReconciliationToCashFlowRollForward" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ConsolidationItemsAxis_019cc591-a808-7b8d-8748-e89652956b56_terseLabel_en-US" xlink:label="lab_srt_ConsolidationItemsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidation Items [Axis]</link:label>
    <link:label id="lab_srt_ConsolidationItemsAxis_label_en-US" xlink:label="lab_srt_ConsolidationItemsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidation Items [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidationItemsAxis" xlink:to="lab_srt_ConsolidationItemsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_UnamortizedDebtIssuanceExpense_019cc591-a891-72d5-bab3-89b99dcb918f_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_UnamortizedDebtIssuanceExpense" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Unamortized debt issuance costs</link:label>
    <link:label id="lab_us-gaap_UnamortizedDebtIssuanceExpense_label_en-US" xlink:label="lab_us-gaap_UnamortizedDebtIssuanceExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unamortized Debt Issuance Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnamortizedDebtIssuanceExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnamortizedDebtIssuanceExpense" xlink:to="lab_us-gaap_UnamortizedDebtIssuanceExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock_019cc591-a891-73b6-8dba-39c93e4dbf0d_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Significant Assumptions used in Valuation</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock" xlink:to="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_CounterpartyNameAxis_019cc591-a75f-70f3-b405-a3cd9e42207c_terseLabel_en-US" xlink:label="lab_srt_CounterpartyNameAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Counterparty Name [Axis]</link:label>
    <link:label id="lab_srt_CounterpartyNameAxis_label_en-US" xlink:label="lab_srt_CounterpartyNameAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Counterparty Name [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_CounterpartyNameAxis" xlink:to="lab_srt_CounterpartyNameAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ServicingMember_019cc591-a808-7d0c-8c9b-c84313564dab_terseLabel_en-US" xlink:label="lab_onit_ServicingMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing</link:label>
    <link:label id="lab_onit_ServicingMember_label_en-US" xlink:label="lab_onit_ServicingMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing [Member]</link:label>
    <link:label id="lab_onit_ServicingMember_documentation_en-US" xlink:label="lab_onit_ServicingMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans serviced on behalf of others.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ServicingMember" xlink:href="onit-20260331.xsd#onit_ServicingMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ServicingMember" xlink:to="lab_onit_ServicingMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_FairValueAgencyMortgageServicingRightsMember_019cc591-a75e-791f-88e5-ba3214421570_terseLabel_en-US" xlink:label="lab_onit_FairValueAgencyMortgageServicingRightsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Agency Mortgage Servicing Rights</link:label>
    <link:label id="lab_onit_FairValueAgencyMortgageServicingRightsMember_label_en-US" xlink:label="lab_onit_FairValueAgencyMortgageServicingRightsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Agency Mortgage Servicing Rights [Member]</link:label>
    <link:label id="lab_onit_FairValueAgencyMortgageServicingRightsMember_documentation_en-US" xlink:label="lab_onit_FairValueAgencyMortgageServicingRightsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fair value agency mortgage servicing rights.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_FairValueAgencyMortgageServicingRightsMember" xlink:href="onit-20260331.xsd#onit_FairValueAgencyMortgageServicingRightsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_FairValueAgencyMortgageServicingRightsMember" xlink:to="lab_onit_FairValueAgencyMortgageServicingRightsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityIncorporationStateCountryCode_019cc591-a808-7302-8a4d-d6e1d71a55be_terseLabel_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
    <link:label id="lab_dei_EntityIncorporationStateCountryCode_label_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityIncorporationStateCountryCode" xlink:to="lab_dei_EntityIncorporationStateCountryCode" xlink:type="arc" order="1"/>
    <link:label id="lab_ecd_NonNeosMember_terseLabel_en-US" xlink:label="lab_ecd_NonNeosMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-NEOs</link:label>
    <link:label id="lab_ecd_NonNeosMember_label_en-US" xlink:label="lab_ecd_NonNeosMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-NEOs [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ecd_NonNeosMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_NonNeosMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ecd_NonNeosMember" xlink:to="lab_ecd_NonNeosMember" xlink:type="arc" order="1"/>
    <link:label id="lab_onit_ReverseMortgageLoanInterestRateLockCommitmentsMember_019cc591-a75e-7ac5-bd24-3eb506869d14_terseLabel_en-US" xlink:label="lab_onit_ReverseMortgageLoanInterestRateLockCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reverse loans IRLCs</link:label>
    <link:label id="lab_onit_ReverseMortgageLoanInterestRateLockCommitmentsMember_label_en-US" xlink:label="lab_onit_ReverseMortgageLoanInterestRateLockCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reverse Mortgage Loan Interest Rate Lock Commitments [Member]</link:label>
    <link:label id="lab_onit_ReverseMortgageLoanInterestRateLockCommitmentsMember_documentation_en-US" xlink:label="lab_onit_ReverseMortgageLoanInterestRateLockCommitmentsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Reverse mortgage loan interest rate lock commitments.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_onit_ReverseMortgageLoanInterestRateLockCommitmentsMember" xlink:href="onit-20260331.xsd#onit_ReverseMortgageLoanInterestRateLockCommitmentsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_onit_ReverseMortgageLoanInterestRateLockCommitmentsMember" xlink:to="lab_onit_ReverseMortgageLoanInterestRateLockCommitmentsMember" xlink:type="arc" order="1"/>
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