<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e177a-a406-756b-bf3f-82842f6b3633,g:beecdadd-6f56-4c1e-9c28-9c49b0547200-->
<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://i3verticals.com/role/Cover" xlink:type="simple" xlink:href="iiiv-20260512.xsd#Cover"/>
  <link:presentationLink xlink:role="http://i3verticals.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CoverAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019e177a-a406-7ebf-9477-710d9543ba8e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_DocumentType_019e177a-a406-7ebf-9477-710d9543ba8e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019e177a-a406-7e35-a368-17a2853e80f9" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentPeriodEndDate"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_DocumentPeriodEndDate_019e177a-a406-7e35-a368-17a2853e80f9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019e177a-a406-73be-a4c4-b9457a4c35e6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_EntityRegistrantName_019e177a-a406-73be-a4c4-b9457a4c35e6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019e177a-a406-7e58-bfa5-5e81c7d126c4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019e177a-a406-7e58-bfa5-5e81c7d126c4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019e177a-a406-79ba-a5b0-096df92d7b31" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_EntityFileNumber_019e177a-a406-79ba-a5b0-096df92d7b31" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019e177a-a406-7b75-854c-97ec1d1b1c05" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_EntityTaxIdentificationNumber_019e177a-a406-7b75-854c-97ec1d1b1c05" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019e177a-a406-7387-b61f-917a3e050c3c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_EntityAddressAddressLine1_019e177a-a406-7387-b61f-917a3e050c3c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019e177a-a406-728d-8aa6-c2b474c682d9" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_EntityAddressCityOrTown_019e177a-a406-728d-8aa6-c2b474c682d9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019e177a-a406-7d27-bad4-a767d6fdc982" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressStateOrProvince"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_EntityAddressStateOrProvince_019e177a-a406-7d27-bad4-a767d6fdc982" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019e177a-a406-7172-b741-92465a65e49c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_EntityAddressPostalZipCode_019e177a-a406-7172-b741-92465a65e49c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019e177a-a406-76ee-b510-a23432a4c4a6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_CityAreaCode_019e177a-a406-76ee-b510-a23432a4c4a6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019e177a-a406-737c-8128-b47c8e687a10" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_LocalPhoneNumber_019e177a-a406-737c-8128-b47c8e687a10" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_019e177a-a406-7af5-9a7a-4b74aa70c011" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_WrittenCommunications"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_WrittenCommunications_019e177a-a406-7af5-9a7a-4b74aa70c011" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_019e177a-a406-7ea7-a913-d86876852bc2" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SolicitingMaterial"/>
    <link:presentationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_SolicitingMaterial_019e177a-a406-7ea7-a913-d86876852bc2" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_019e177a-a406-70c0-b20e-8a1b55975e5d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_PreCommencementTenderOffer"/>
    <link:presentationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_PreCommencementTenderOffer_019e177a-a406-70c0-b20e-8a1b55975e5d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_019e177a-a406-755d-b634-d45b4fddc654" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:presentationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_019e177a-a406-755d-b634-d45b4fddc654" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019e177a-a406-72eb-8ef7-e4ad632ad3bc" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_Security12bTitle"/>
    <link:presentationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_Security12bTitle_019e177a-a406-72eb-8ef7-e4ad632ad3bc" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019e177a-a406-77b0-a647-0795b9afe760" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_TradingSymbol"/>
    <link:presentationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_TradingSymbol_019e177a-a406-77b0-a647-0795b9afe760" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019e177a-a406-7ccf-ac45-41acaad2fd9a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SecurityExchangeName"/>
    <link:presentationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_SecurityExchangeName_019e177a-a406-7ccf-ac45-41acaad2fd9a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019e177a-a406-7267-97ac-b0d098e22fdc" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:presentationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_EntityEmergingGrowthCompany_019e177a-a406-7267-97ac-b0d098e22fdc" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019e177a-a406-7f5d-9347-abd35ca42bcc" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:presentationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_EntityCentralIndexKey_019e177a-a406-7f5d-9347-abd35ca42bcc" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019e177a-a406-7262-a9a6-068629b8cccd" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:presentationArc order="22" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e177a-a406-7447-a6e7-2a3f4caec2bb" xlink:to="loc_dei_AmendmentFlag_019e177a-a406-7262-a9a6-068629b8cccd" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
</link:linkbase>
