Summary of Significant Accounting Policies (Policies)	3 Months Ended
Jun. 30, 2025
Accounting Policies [Abstract]
Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of consolidated financial statement presentation The consolidated financial statements include the accounts of the Company, the Bank and the Bank’s wholly-owned or majority-owned subsidiaries, Carver Asset Corporation, CFSB Realty Corp., CCDC, and CFSB Credit Corp., which is currently inactive. All significant intercompany accounts and transactions have been eliminated in consolidation. The Company's subsidiary, Carver Statutory Trust I, is not consolidated with Carver Bancorp, Inc. for financial reporting purposes. Carver Statutory Trust I was formed in 2003 for the purpose of issuing $13 million aggregate liquidation amount of floating rate Capital Securities due September 17, 2033 (“Capital Securities”) and $0.4 million of common securities (which are the only voting securities of Carver Statutory Trust I), which are 100% owned by Carver Bancorp, Inc., and using the proceeds to acquire Junior Subordinated Debentures issued by Carver Bancorp, Inc. Carver Bancorp, Inc. has fully and unconditionally guaranteed the Capital Securities along with all obligations of Carver Statutory Trust I under the trust agreement relating to the Capital Securities. The Company does not consolidate the accounts and related activity of Carver Statutory Trust I because it is not the primary beneficiary of the entity. Variable interest entities ("VIEs") are consolidated, as required, when Carver has a controlling financial interest in these entities and is deemed to be the primary beneficiary. Carver is normally deemed to have a controlling financial interest and be the primary beneficiary if it has both (a) the power to direct activities of a VIE that most significantly impact the entity's economic performance; and (b) the obligation to absorb losses of the entity that could benefit from the activities that could potentially be significant to the VIE. The consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles ("GAAP") for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair statement of the results of the interim period are presented. Operating results for the three month period ended June 30, 2025 are not necessarily indicative of the results that may be expected for the year ended March 31, 2026. The consolidated balance sheet at June 30, 2025 has been derived from the unaudited consolidated financial statements at that date, but does not include all of the information and footnotes required by GAAP for complete financial statements. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the consolidated statement of financial condition and revenues and expenses for the period then ended. These unaudited consolidated financial statements should be read in conjunction with the Annual Report on Form 10-K for the year ended March 31, 2025. Amounts subject to significant estimates and assumptions are items such as the allowance for credit losses, realization of deferred tax assets, and the fair value of financial instruments. While management uses available information to recognize losses on loans, future additions to the allowance for credit loss or future writedowns of real estate owned may be necessary based on changes in economic conditions in the areas where Carver Federal has extended mortgages and other credit instruments. Actual results could differ significantly from those assumptions. Current market conditions increase the risk and complexity of the judgments in these estimates. Certain comparative amounts for the prior period have been reclassified to conform to current period presentations. Such reclassifications had no effect on net income or shareholders' equity. Recent Events The business climate continues to present significant challenges as banks continue to absorb heightened regulatory costs and compete for limited loan demand. Inflationary pressure appears to have decreased, but rates remain high and affect customer demand. The target interest rate range had been held steady at its highest point between 5.25% and 5.5% since July 2023, until the Federal Reserve lowered the rates by 50 basis points in September 2024, easing monetary policy for the first time since regular increases began in March 2022. The Federal Reserve approved two additional cuts in November and December 2024, lowering the overnight borrowing rate to a range between 4.25% to 4.5%, but left interest rates unchanged at its July 2025 meeting. For Carver, the economic climate of New York City (“the City”), in particular, impacts our business as the City lags behind the rest of New York State and the nation both in job growth and levels of unemployment. The City's local area inflation has exceeded the national rate, primarily due to housing costs, and its unemployment rate remains high at 5.1%, exceeding the national average. On July 4, 2025, President Trump signed into law the legislation formally titled "An Act to Provide for Reconciliation Pursuant to Title II of H. Con. Res. 14" and commonly referred to as the One Big Beautiful Bill (the Act). The Company is evaluating income tax implications of the Act. The Company does not currently expect the Act to have a material impact on the Company's financial statements. The Bank's liquidity position remains adequate. The impact of market volatility from continued inflation and high interest rates will depend on future developments, which are highly uncertain and difficult to predict. The Company is closely monitoring its asset quality, liquidity, and capital positions, as well as the credit risk in its loan portfolio. Management is actively working to minimize the current and future impact of the current business and industry environment, and is continuing to make adjustments to operations where appropriate or necessary to mitigate risk. However, these factors and events may have negative effects on the business, financial condition, and results of operations of the Company and its customers. Recent Accounting Standards Accounting Standards Recently Adopted On March 31, 2025, the Company adopted ASU No. 2023-07 "Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures," which improves reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. The amendments in this update should be applied retrospectively to all prior periods presented in the financial statements. The Company has determined that all of its activities constitute one reportable operating segment and there was no material impact on the consolidated financial statements upon adoption. Accounting Standards Not Yet Adopted In November 2024, the FASB issued ASU No. 2024-03 "Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40)" to improve the disclosures about a public business entity's expenses and address investor requests for more detailed information about the types of expenses (including purchases of inventory, employee compensation, depreciation, amortization, and depletion) in commonly presented expense captions. ASU No. 2024-03 is effective for fiscal years beginning after December 15, 2026 (for the Company, the fiscal year ending March 31, 2028), and interim periods beginning after December 15, 2027. Early adoption is permitted. The amendments in this update should be applied either prospectively to financial statements issued for reporting periods after the effective date of this update, or retrospectively to any or all prior periods presented in the financial statements. ASU 2024-03 is not expected to have a material impact on the Company's financial statements. In December 2023, the FASB issued ASU No. 2023-09 "Income Taxes (Topic 740): Improvements to Income Tax Disclosures" to enhance income tax disclosures to help investors better assess how a company's operations and related tax risks and tax planning and operational opportunities affect its tax rate and prospects for future cash flows. The amendments in this update will require further disaggregated information about a reporting entity's effective tax rate reconciliation and information on income taxes paid. ASU No. 2023-09 is effective for fiscal years beginning after December 15, 2024 (for the Company, the fiscal year ending March 31, 2026), and interim periods within those fiscal years. Early adoption is permitted. The amendments in this update should be applied on a prospective basis with an option for retrospective application. ASU 2023-09 is not expected to have a material impact on the Company's financial statements.
Basis of Accounting	Basis of consolidated financial statement presentation The consolidated financial statements include the accounts of the Company, the Bank and the Bank’s wholly-owned or majority-owned subsidiaries, Carver Asset Corporation, CFSB Realty Corp., CCDC, and CFSB Credit Corp., which is currently inactive. All significant intercompany accounts and transactions have been eliminated in consolidation. The Company's subsidiary, Carver Statutory Trust I, is not consolidated with Carver Bancorp, Inc. for financial reporting purposes. Carver Statutory Trust I was formed in 2003 for the purpose of issuing $13 million aggregate liquidation amount of floating rate Capital Securities due September 17, 2033 (“Capital Securities”) and $0.4 million of common securities (which are the only voting securities of Carver Statutory Trust I), which are 100% owned by Carver Bancorp, Inc., and using the proceeds to acquire Junior Subordinated Debentures issued by Carver Bancorp, Inc. Carver Bancorp, Inc. has fully and unconditionally guaranteed the Capital Securities along with all obligations of Carver Statutory Trust I under the trust agreement relating to the Capital Securities. The Company does not consolidate the accounts and related activity of Carver Statutory Trust I because it is not the primary beneficiary of the entity. Variable interest entities ("VIEs") are consolidated, as required, when Carver has a controlling financial interest in these entities and is deemed to be the primary beneficiary. Carver is normally deemed to have a controlling financial interest and be the primary beneficiary if it has both (a) the power to direct activities of a VIE that most significantly impact the entity's economic performance; and (b) the obligation to absorb losses of the entity that could benefit from the activities that could potentially be significant to the VIE. The consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles ("GAAP") for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair statement of the results of the interim period are presented. Operating results for the three month period ended June 30, 2025 are not necessarily indicative of the results that may be expected for the year ended March 31, 2026. The consolidated balance sheet at June 30, 2025 has been derived from the unaudited consolidated financial statements at that date, but does not include all of the information and footnotes required by GAAP for complete financial statements. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the consolidated statement of financial condition and revenues and expenses for the period then ended. These unaudited consolidated financial statements should be read in conjunction with the Annual Report on Form 10-K for the year ended March 31, 2025. Amounts subject to significant estimates and assumptions are items such as the allowance for credit losses, realization of deferred tax assets, and the fair value of financial instruments. While management uses available information to recognize losses on loans, future additions to the allowance for credit loss or future writedowns of real estate owned may be necessary based on changes in economic conditions in the areas where Carver Federal has extended mortgages and other credit instruments. Actual results could differ significantly from those assumptions. Current market conditions increase the risk and complexity of the judgments in these estimates. Certain comparative amounts for the prior period have been reclassified to conform to current period presentations. Such reclassifications had no effect on net income or shareholders' equity.
New Accounting Pronouncements, Policy	Recent Accounting Standards Accounting Standards Recently Adopted On March 31, 2025, the Company adopted ASU No. 2023-07 "Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures," which improves reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. The amendments in this update should be applied retrospectively to all prior periods presented in the financial statements. The Company has determined that all of its activities constitute one reportable operating segment and there was no material impact on the consolidated financial statements upon adoption. Accounting Standards Not Yet Adopted In November 2024, the FASB issued ASU No. 2024-03 "Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40)" to improve the disclosures about a public business entity's expenses and address investor requests for more detailed information about the types of expenses (including purchases of inventory, employee compensation, depreciation, amortization, and depletion) in commonly presented expense captions. ASU No. 2024-03 is effective for fiscal years beginning after December 15, 2026 (for the Company, the fiscal year ending March 31, 2028), and interim periods beginning after December 15, 2027. Early adoption is permitted. The amendments in this update should be applied either prospectively to financial statements issued for reporting periods after the effective date of this update, or retrospectively to any or all prior periods presented in the financial statements. ASU 2024-03 is not expected to have a material impact on the Company's financial statements. In December 2023, the FASB issued ASU No. 2023-09 "Income Taxes (Topic 740): Improvements to Income Tax Disclosures" to enhance income tax disclosures to help investors better assess how a company's operations and related tax risks and tax planning and operational opportunities affect its tax rate and prospects for future cash flows. The amendments in this update will require further disaggregated information about a reporting entity's effective tax rate reconciliation and information on income taxes paid. ASU No. 2023-09 is effective for fiscal years beginning after December 15, 2024 (for the Company, the fiscal year ending March 31, 2026), and interim periods within those fiscal years. Early adoption is permitted. The amendments in this update should be applied on a prospective basis with an option for retrospective application. ASU 2023-09 is not expected to have a material impact on the Company's financial statements.

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Jun. 30, 2025

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of consolidated financial statement presentation

The consolidated financial statements include the accounts of the Company, the Bank and the Bank’s wholly-owned or majority-owned subsidiaries, Carver Asset Corporation, CFSB Realty Corp., CCDC, and CFSB Credit Corp., which is currently inactive. All significant intercompany accounts and transactions have been eliminated in consolidation.

The Company's subsidiary, Carver Statutory Trust I, is not consolidated with Carver Bancorp, Inc. for financial reporting purposes. Carver Statutory Trust I was formed in 2003 for the purpose of issuing $13 million aggregate liquidation amount of floating rate Capital Securities due September 17, 2033 (“Capital Securities”) and $0.4 million of common securities (which are the only voting securities of Carver Statutory Trust I), which are 100% owned by Carver Bancorp, Inc., and using the proceeds to acquire Junior Subordinated Debentures issued by Carver Bancorp, Inc. Carver Bancorp, Inc. has fully and unconditionally guaranteed the Capital Securities along with all obligations of Carver Statutory Trust I under the trust agreement relating to the Capital Securities. The Company does not consolidate the accounts and related activity of Carver Statutory Trust I because it is not the primary beneficiary of the entity.

Variable interest entities ("VIEs") are consolidated, as required, when Carver has a controlling financial interest in these entities and is deemed to be the primary beneficiary. Carver is normally deemed to have a controlling financial interest and be the primary beneficiary if it has both (a) the power to direct activities of a VIE that most significantly impact the entity's economic performance; and (b) the obligation to absorb losses of the entity that could benefit from the activities that could potentially be significant to the VIE.

The consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles ("GAAP") for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair statement of the results of the interim period are presented. Operating results for the three month period ended June 30, 2025 are not necessarily indicative of the results that may be expected for the year ended March 31, 2026. The consolidated balance sheet at June 30, 2025 has been derived from the unaudited consolidated financial statements at that date, but does not include all of the information and footnotes required by GAAP for complete financial statements. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the consolidated statement of financial condition and revenues and expenses for the period then ended. These unaudited consolidated financial statements should be read in conjunction with the Annual Report on Form 10-K for the year ended March 31, 2025. Amounts subject to significant estimates and assumptions are items such as the allowance for credit losses, realization of deferred tax assets, and the fair value of financial instruments. While management uses available information to recognize losses on loans, future additions to the allowance for credit loss or future writedowns of real estate owned may be necessary based on changes in economic conditions in the areas where Carver Federal has extended mortgages and other credit instruments. Actual results could differ significantly from those assumptions. Current market conditions increase the risk and complexity of the judgments in these estimates.

Certain comparative amounts for the prior period have been reclassified to conform to current period presentations. Such reclassifications had no effect on net income or shareholders' equity.

Recent Events

The business climate continues to present significant challenges as banks continue to absorb heightened regulatory costs and compete for limited loan demand. Inflationary pressure appears to have decreased, but rates remain high and affect customer demand. The target interest rate range had been held steady at its highest point between 5.25% and 5.5% since July 2023, until the Federal Reserve lowered the rates by 50 basis points in September 2024, easing monetary policy for the first

time since regular increases began in March 2022. The Federal Reserve approved two additional cuts in November and December 2024, lowering the overnight borrowing rate to a range between 4.25% to 4.5%, but left interest rates unchanged at its July 2025 meeting. For Carver, the economic climate of New York City (“the City”), in particular, impacts our business as the City lags behind the rest of New York State and the nation both in job growth and levels of unemployment. The City's local area inflation has exceeded the national rate, primarily due to housing costs, and its unemployment rate remains high at 5.1%, exceeding the national average. On July 4, 2025, President Trump signed into law the legislation formally titled "An Act to Provide for Reconciliation Pursuant to Title II of H. Con. Res. 14" and commonly referred to as the One Big Beautiful Bill (the Act). The Company is evaluating income tax implications of the Act. The Company does not currently expect the Act to have a material impact on the Company's financial statements.

The Bank's liquidity position remains adequate. The impact of market volatility from continued inflation and high interest rates will depend on future developments, which are highly uncertain and difficult to predict. The Company is closely monitoring its asset quality, liquidity, and capital positions, as well as the credit risk in its loan portfolio. Management is actively working to minimize the current and future impact of the current business and industry environment, and is continuing to make adjustments to operations where appropriate or necessary to mitigate risk. However, these factors and events may have negative effects on the business, financial condition, and results of operations of the Company and its customers.

Recent Accounting Standards

Accounting Standards Recently Adopted

On March 31, 2025, the Company adopted ASU No. 2023-07 "Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures," which improves reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. The amendments in this update should be applied retrospectively to all prior periods presented in the financial statements. The Company has determined that all of its activities constitute one reportable operating segment and there was no material impact on the consolidated financial statements upon adoption.

Accounting Standards Not Yet Adopted

In November 2024, the FASB issued ASU No. 2024-03 "Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40)" to improve the disclosures about a public business entity's expenses and address investor requests for more detailed information about the types of expenses (including purchases of inventory, employee compensation, depreciation, amortization, and depletion) in commonly presented expense captions. ASU No. 2024-03 is effective for fiscal years beginning after December 15, 2026 (for the Company, the fiscal year ending March 31, 2028), and interim periods beginning after December 15, 2027. Early adoption is permitted. The amendments in this update should be applied either prospectively to financial statements issued for reporting periods after the effective date of this update, or retrospectively to any or all prior periods presented in the financial statements. ASU 2024-03 is not expected to have a material impact on the Company's financial statements.

In December 2023, the FASB issued ASU No. 2023-09 "Income Taxes (Topic 740): Improvements to Income Tax Disclosures" to enhance income tax disclosures to help investors better assess how a company's operations and related tax risks and tax planning and operational opportunities affect its tax rate and prospects for future cash flows. The amendments in this update will require further disaggregated information about a reporting entity's effective tax rate reconciliation and information on income taxes paid. ASU No. 2023-09 is effective for fiscal years beginning after December 15, 2024 (for the Company, the fiscal year ending March 31, 2026), and interim periods within those fiscal years. Early adoption is permitted. The amendments in this update should be applied on a prospective basis with an option for retrospective application. ASU 2023-09 is not expected to have a material impact on the Company's financial statements.

Basis of Accounting

Basis of consolidated financial statement presentation

Certain comparative amounts for the prior period have been reclassified to conform to current period presentations. Such reclassifications had no effect on net income or shareholders' equity.

New Accounting Pronouncements, Policy

Recent Accounting Standards

Accounting Standards Recently Adopted

Accounting Standards Not Yet Adopted