Summary of Significant Accounting Policies	9 Months Ended
Dec. 31, 2025
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 1: SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES The accompanying unaudited consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and conform to practices within the banking industry. The accounting policies followed in the preparation of the interim consolidated financial statements are consistent with those used in the preparation of the annual financial statements. The interim consolidated financial statements reflect all normal and recurring adjustments that are necessary, in the opinion of management, for fair statement of results for the interim periods presented. Results for the three- and nine-months period ended December 31, 2025, are not necessarily indicative of the results that may be expected for the year ending March 31, 2026, or any other period. Nature of Operations—Central Plains Bancshares, Inc. (the “Company”) was formed to serve as the holding company for Home Federal Savings and Loan Association of Grand Island (the “Association”), upon conversion into the stock form of organization, which was completed on October 19, 2023. The Company completed its stock offering on October 19, 2023. The Company sold 4,130,815 shares of common stock at $10.00 per share in its subscription offering for gross proceeds of approximately $41.3 million. Shares of the Company's common stock began trading on October 20, 2023 on the Nasdaq Capital Market under the trading symbol "CPBI." The Association is a federally chartered stock savings and loan association whose primary business is providing mortgage, consumer, commercial real estate, and commercial loans in the Grand Island, Nebraska area, with additional lending opportunities through the Association’s participation network of banks in Nebraska and other states, and acquiring consumer and commercial deposits to fund these investments. Basis of Presentation—The accompanying unaudited Consolidated Financial Statements were prepared in accordance with GAAP and the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with Central Plains Bancshares, Inc.’s Consolidated Financial Statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the year ended March 31, 2025. The unaudited Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation. Management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and reported amounts of revenues and expenses during the reporting period. Significant estimates that are particularly susceptible to change in the near term relate to the determination of the allowance for credit losses, as well as the fair value measurements of investment securities. As with any estimate, actual results could differ from those estimates. The Company's revenue is primarily derived from the business of banking. The Company's financial performance is monitored on consolidated basis by Mr. Dannel Garness, President and CEO, who is considered to be the Company's Chief Operating Decision Maker ("CODM"). All of the Company’s financial results are similar and considered by management to be aggregated into one reportable operating segment. While the Company has assigned certain management responsibilities by business-line, the Company’s Chief Operating Decision Maker ("CODM") evaluates financial performance on a Company-wide basis. The Company's assigned business lines have similar economic characteristics, products, services and customers. Accordingly, all of the Company’s operations are considered by management to be aggregated in one reportable operating segment. Financial performance is reported to the CODM monthly, and the primary measure of performance is consolidated net income. The allocation of resources throughout the Company is determined annually based upon consolidated net income performance. The presentation of financial performance to the CODM is consistent with amounts and financial statement line items shown in the Company's consolidated balance sheets and consolidated statements of operations. Additionally, the Company's significant expenses are adequately segmented by category and amount in the consolidated statements of operations to include all significant items when considering both qualitative and quantitative factors. Significant expenses of the Company include salaries and employee benefits, equipment and occupancy expense, data processing, professional services and advertising. In March 2024, the FASB issued ASU No. 2024-01, “Compensation—Stock Compensation (Topic 718): Scope Applications of Profits Interests and Similar Awards” (ASU 2024-01). ASU 2024-01 adds an example to Topic 718 which illustrates how to apply the scope guidance to determine whether profits interests and similar awards should be accounted for as share-based payment arrangements under Topic 718 or under other U.S. GAAP. ASU 2024-01 is effective for annual periods beginning after December 15, 2025, although early adoption is permitted. Upon adoption, ASU 2024-01 is not expected to have a material impact on the Company’s consolidated balance sheets or consolidated statements of operations. On December 14, 2023, the FASB issued ASU 2023-09 “Income Taxes (Topic 740): Improvements to Income Tax Disclosures”. The amendments require that public business entities on an annual basis (1) disclose specific categories in the rate reconciliation, and (2) provide additional information for reconciling items that meet a quantitative threshold (if the effect of those reconciling items is equal to or greater than 5 percent of the amount computed by multiplying pretax income (or loss) by the applicable statutory income tax rate). The amendments require that all entities disclose on an annual basis the following information about income taxes paid: (1) The amount of income taxes paid (net of refunds received) disaggregated by federal (national), state, and foreign taxes, and (2) The amount of income taxes paid (net of refunds received) disaggregated by individual jurisdictions in which income taxes paid (net of refunds received) is equal to or greater than 5 percent of total income taxes paid (net of refunds received). The amendments also require that all entities disclose the following information: (1) Income (or loss) from continuing operations before income tax expense (or benefit) disaggregated between domestic and foreign, and (2) Income tax expense (or benefit) from continuing operations disaggregated by federal (national), state, and foreign. The ASU is effective for public business entities for annual periods beginning after December 15, 2024. Early adoption is permitted for annual financial statements that have not yet been issued or made available for issuance. The amendments should be applied on a prospective basis. Retrospective application is permitted. The Company will adopt this ASU, and does not expect the amendments to have a material impact to the annual financial statements of the Company. In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. The new standard requires tabular disclosure of certain costs and expenses including more detailed disclosures of certain categories of expenses such as employee compensation, depreciation and intangible asset amortization that are components of existing expense captions presented on the face of the income statement. The ASU should be applied prospectively for annual reporting periods beginning after December 15, 2026, with retrospective application and early adoption permitted. The Company is currently evaluating the impacts of this guidance on the Company’s consolidated financial statements. Subsequent events have been evaluated through the date of issuance of the unaudited Consolidated Financial Statements. No significant subsequent events have occurred through this date requiring adjustment to the financial statements or disclosures.

The accompanying unaudited consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and conform to practices within the banking industry. The accounting policies followed in the preparation of the interim consolidated financial statements are consistent with those used in the preparation of the annual financial statements. The interim consolidated financial statements reflect all normal and recurring adjustments that are necessary, in the opinion of management, for fair statement of results for the interim periods presented. Results for the three- and nine-months period ended December 31, 2025, are not necessarily indicative of the results that may be expected for the year ending March 31, 2026, or any other period.

Nature of Operations—Central Plains Bancshares, Inc. (the “Company”) was formed to serve as the holding company for Home Federal Savings and Loan Association of Grand Island (the “Association”), upon conversion into the stock form of organization, which was completed on October 19, 2023.

The Company completed its stock offering on October 19, 2023. The Company sold 4,130,815 shares of common stock at $10.00 per share in its subscription offering for gross proceeds of approximately $41.3 million. Shares of the Company's common stock began trading on October 20, 2023 on the Nasdaq Capital Market under the trading symbol "CPBI."

The Association is a federally chartered stock savings and loan association whose primary business is providing mortgage, consumer, commercial real estate, and commercial loans in the Grand Island, Nebraska area, with additional lending opportunities through the Association’s participation network of banks in Nebraska and other states, and acquiring consumer and commercial deposits to fund these investments.

Basis of Presentation—The accompanying unaudited Consolidated Financial Statements were prepared in accordance with GAAP and the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with Central Plains Bancshares, Inc.’s Consolidated Financial Statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the year ended March 31, 2025. The unaudited Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

Management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and reported amounts of revenues and expenses during the reporting period. Significant estimates that are particularly susceptible to change in the near term relate to the determination of the allowance for credit losses, as well as the fair value measurements of investment securities. As with any estimate, actual results could differ from those estimates.

The Company's revenue is primarily derived from the business of banking. The Company's financial performance is monitored on consolidated basis by Mr. Dannel Garness, President and CEO, who is considered to be the Company's Chief Operating Decision Maker ("CODM").

All of the Company’s financial results are similar and considered by management to be aggregated into one reportable operating segment. While the Company has assigned certain management responsibilities by business-line, the Company’s Chief Operating Decision Maker ("CODM") evaluates financial performance on a Company-wide basis. The Company's assigned business lines have similar economic characteristics, products, services and customers. Accordingly, all of the Company’s operations are considered by management to be aggregated in one reportable operating segment.

Financial performance is reported to the CODM monthly, and the primary measure of performance is consolidated net income. The allocation of resources throughout the Company is determined annually based upon consolidated net income performance. The presentation of financial performance to the CODM is consistent with amounts and financial statement line items shown in the Company's consolidated balance sheets and consolidated statements of operations. Additionally, the Company's significant expenses are adequately segmented by category and amount in the consolidated statements of operations to include all significant items when considering both qualitative and quantitative factors. Significant expenses of the Company include salaries and employee benefits, equipment and occupancy expense, data processing, professional services and advertising.

In March 2024, the FASB issued ASU No. 2024-01, “Compensation—Stock Compensation (Topic 718): Scope Applications of Profits Interests and Similar Awards” (ASU 2024-01). ASU 2024-01 adds an example to Topic 718 which illustrates how to apply the scope guidance to determine whether profits interests and similar awards should be accounted for as share-based payment arrangements under Topic 718 or under other U.S. GAAP. ASU 2024-01 is effective for annual periods beginning after December 15,

2025, although early adoption is permitted. Upon adoption, ASU 2024-01 is not expected to have a material impact on the Company’s consolidated balance sheets or consolidated statements of operations.

On December 14, 2023, the FASB issued ASU 2023-09 “Income Taxes (Topic 740): Improvements to Income Tax Disclosures”. The amendments require that public business entities on an annual basis (1) disclose specific categories in the rate reconciliation, and (2) provide additional information for reconciling items that meet a quantitative threshold (if the effect of those reconciling items is equal to or greater than 5 percent of the amount computed by multiplying pretax income (or loss) by the applicable statutory income tax rate). The amendments require that all entities disclose on an annual basis the following information about income taxes paid: (1) The amount of income taxes paid (net of refunds received) disaggregated by federal (national), state, and foreign taxes, and (2) The amount of income taxes paid (net of refunds received) disaggregated by individual jurisdictions in which income taxes paid (net of refunds received) is equal to or greater than 5 percent of total income taxes paid (net of refunds received). The amendments also require that all entities disclose the following information: (1) Income (or loss) from continuing operations before income tax expense (or benefit) disaggregated between domestic and foreign, and (2) Income tax expense (or benefit) from continuing operations disaggregated by federal (national), state, and foreign. The ASU is effective for public business entities for annual periods beginning after December 15, 2024. Early adoption is permitted for annual financial statements that have not yet been issued or made available for issuance. The amendments should be applied on a prospective basis. Retrospective application is permitted. The Company will adopt this ASU, and does not expect the amendments to have a material impact to the annual financial statements of the Company.

In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. The new standard requires tabular disclosure of certain costs and expenses including more detailed disclosures of certain categories of expenses such as employee compensation, depreciation and intangible asset amortization that are components of existing expense captions presented on the face of the income statement. The ASU should be applied prospectively for annual reporting periods beginning after December 15, 2026, with retrospective application and early adoption permitted. The Company is currently evaluating the impacts of this guidance on the Company’s consolidated financial statements.

Subsequent events have been evaluated through the date of issuance of the unaudited Consolidated Financial Statements. No significant subsequent events have occurred through this date requiring adjustment to the financial statements or disclosures.