Basis of Presentation	3 Months Ended
Mar. 31, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Note 1: Basis of Presentation BancPlus Corporation (the “Company”) is a bank holding company headquartered in Ridgeland, Mississippi operating in one reportable segment. BankPlus (the “Bank”), the principal operating subsidiary and sole banking subsidiary of the Company, is a commercial bank primarily engaged in the business of commercial and consumer banking. In addition to general and consumer banking, other products and services offered through the Bank’s subsidiaries include certain insurance and annuity services, asset and investment management and financial planning services. Oakhurst Development, Inc. (“Oakhurst”) is a real estate subsidiary originally formed by the Company to liquidate a real estate development that was acquired by the Bank through foreclosure in 2002. Oakhurst became active again in March 2009 and holds loans. The unaudited interim consolidated financial statements include the accounts of the Company and all other entities in which the Company has a controlling financial interest, and reflect all adjustments (consisting of normal recurring adjustments) that are necessary in the opinion of the Company’s management to fairly present the financial position, results of operations and cash flows of the Company. They have been derived from the audited consolidated financial statements for the fiscal year ended December 31, 2025; however, certain notes and information have been omitted from the interim periods. Therefore, these unaudited interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2025. All significant intercompany balances and transactions have been eliminated in consolidation. The accounting and financial reporting policies followed by the Company conform, in all material respects, to the accounting principles generally accepted in the United States (“GAAP”) and to general practices within the financial services industry. The results of operations for the interim periods are not necessarily indicative of the results to be expected for future interim periods or for the entire year. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. The allowance/provision for credit losses, the fair value of financial instruments and the status of contingencies are particularly subject to change. Material estimates that are subject to significant change in the near term are the allowance for credit losses, provision for credit losses, valuation of other real estate owned and fair values of financial instruments. Actual results could differ from these estimates. Unless otherwise indicated, references to “BancPlus” refer to BancPlus Corporation and its subsidiaries, on a consolidated basis, and references to “BankPlus” refer to BankPlus, our wholly-owned subsidiary, as applicable. Branch Sale On March 20, 2026, the Company completed the previously disclosed sale of its branch located in McComb, Mississippi, including all of its assets and liabilities. The Company completed the sale which included cash paid of $31.1 million, the transfer of $47.4 million of deposits at an 8% deposit premium, and loans of $11.6 million. As a result of the transaction, the Company recognized a net gain of $3.6 million. Effect of Recently Issued, But Not Yet Adopted Accounting Standards Accounting Standards Update 2024-03 (“ASU 2024-03”), “Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures.” In November 2024, the FASB issued ASU 2024-03 which requires entities to disclose details about specific expenses, such as inventory purchases, employee compensation, depreciation, amortization and depletion, included within commonly presented income statement expense captions. The disaggregated expense captions must be disclosed in a tabular format in the notes to the financial statements. ASU 2024-03 is effective for annual periods beginning on January 1, 2027 and interim periods beginning on January 1, 2028. The adoption of ASU 2024-03 is not expected to materially impact the Company’s consolidated financial statements. Accounting Standards Update 2025-08 (“ASU 2025-08”), “Financial Instruments - Credit Losses (Topic 326): Purchased Loans.” In November 2025, the FASB issued ASU 2025-08 which expands the scope of the “gross‑up” method, formerly applicable only to purchased credit‑deteriorated ("PCD") assets, to include acquired non‑PCD loans that meet certain criteria, now referred to as “purchased seasoned loans” ("PSLs"). Under this model, an allowance for expected credit losses is recognized at acquisition, offsetting the loan’s amortized cost basis, thereby eliminating the day-one credit‑loss expense previously required for non‑PCD assets. PSLs are defined as non‑PCD loans acquired either through a business combination or purchased more than 90 days after origination when the acquirer was not involved in origination. ASU 2025-08 is effective, on a prospective basis for loans acquired on or after the adoption date, for interim and annual reporting periods beginning on January 1, 2027, though early adoption is permitted. The adoption of ASU 2025-08 is not expected to materially impact the Company’s consolidated financial statements. Accounting Standards Update 2025-10 ("ASU 2025-10"), "Government Grants (Topic 832): Accounting for Government Grants Received by Business Entities." In December 2025, the FASB issued ASU 2025-10, which establishes comprehensive U.S. GAAP guidance for the recognition, measurement, presentation, and disclosure of government grants received by business entities. Under ASU 2025-10, a government grant is recognized only when it is probable the business will meet the grant's conditions and will receive the grant, and when it meets the recognition criteria for either an asset-related or income-related grant. The update permits either a cost-accumulation or deferred-income approach for asset-related grants, while income-related grants must be recognized systematically over the related expense periods. Entities must also present grant-related income appropriately and disclose the nature of the grants, the accounting policies applied, and significant terms and conditions. ASU 2025-10 is effective on December 15, 2028 for all public entities, with early adoption permitted. The adoption of ASU 2025-10 is not expected to materially impact the Company's consolidated financial statements.

BancPlus Corporation (the “Company”) is a bank holding company headquartered in Ridgeland, Mississippi operating in one reportable segment. BankPlus (the “Bank”), the principal operating subsidiary and sole banking subsidiary of the Company, is a commercial bank primarily engaged in the business of commercial and consumer banking. In addition to general and consumer banking, other products and services offered through the Bank’s subsidiaries include certain insurance and annuity services, asset and investment management and financial planning services. Oakhurst Development, Inc. (“Oakhurst”) is a real estate subsidiary originally formed by the Company to liquidate a real estate development that was acquired by the Bank through foreclosure in 2002. Oakhurst became active again in March 2009 and holds loans.

The unaudited interim consolidated financial statements include the accounts of the Company and all other entities in which the Company has a controlling financial interest, and reflect all adjustments (consisting of normal recurring adjustments) that are necessary in the opinion of the Company’s management to fairly present the financial position, results of operations and cash flows of the Company. They have been derived from the audited consolidated financial statements for the fiscal year ended December 31, 2025; however, certain notes and information have been omitted from the interim periods. Therefore, these unaudited interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2025. All significant intercompany balances and transactions have been eliminated in consolidation. The accounting and financial reporting policies followed by the Company conform, in all material respects, to the accounting principles generally accepted in the United States (“GAAP”) and to general practices within the financial services industry. The results of operations for the interim periods are not necessarily indicative of the results to be expected for future interim periods or for the entire year.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. The allowance/provision for credit losses, the fair value of financial instruments and the status of contingencies are particularly subject to change. Material estimates that are subject to significant change in the near term are the allowance for credit losses, provision for credit losses, valuation of other real estate owned and fair values of financial instruments. Actual results could differ from these estimates.

Unless otherwise indicated, references to “BancPlus” refer to BancPlus Corporation and its subsidiaries, on a consolidated basis, and references to “BankPlus” refer to BankPlus, our wholly-owned subsidiary, as applicable.

Branch Sale

On March 20, 2026, the Company completed the previously disclosed sale of its branch located in McComb, Mississippi, including all of its assets and liabilities. The Company completed the sale which included cash paid of $31.1 million, the transfer of $47.4 million of deposits at an 8% deposit premium, and loans of $11.6 million. As a result of the transaction, the Company recognized a net gain of $3.6 million.

Effect of Recently Issued, But Not Yet Adopted Accounting Standards

Accounting Standards Update 2024-03 (“ASU 2024-03”), “Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures.” In November 2024, the FASB issued ASU 2024-03 which requires entities to disclose details about specific expenses, such as inventory purchases, employee compensation, depreciation, amortization and depletion, included within commonly presented income statement expense captions. The disaggregated expense captions must be disclosed in a tabular format in the notes to the financial statements. ASU 2024-03 is effective for annual periods beginning on January 1, 2027 and interim periods beginning on January 1, 2028. The adoption of ASU 2024-03 is not expected to materially impact the Company’s consolidated financial statements.

Accounting Standards Update 2025-08 (“ASU 2025-08”), “Financial Instruments - Credit Losses (Topic 326): Purchased Loans.” In November 2025, the FASB issued ASU 2025-08 which expands the scope of the “gross‑up” method, formerly applicable only to purchased credit‑deteriorated ("PCD") assets, to include acquired non‑PCD loans that meet certain criteria, now referred to as “purchased seasoned loans” ("PSLs"). Under this model, an allowance for expected credit losses is recognized at acquisition, offsetting the loan’s amortized cost basis, thereby eliminating the day-one credit‑loss expense previously required for non‑PCD assets. PSLs are defined as non‑PCD loans acquired either through a business combination or purchased more than 90 days after origination when the acquirer was not involved in origination. ASU 2025-08 is effective, on a prospective basis for

loans acquired on or after the adoption date, for interim and annual reporting periods beginning on January 1, 2027, though early adoption is permitted. The adoption of ASU 2025-08 is not expected to materially impact the Company’s consolidated financial statements.

Accounting Standards Update 2025-10 ("ASU 2025-10"), "Government Grants (Topic 832): Accounting for Government Grants Received by Business Entities." In December 2025, the FASB issued ASU 2025-10, which establishes comprehensive U.S. GAAP guidance for the recognition, measurement, presentation, and disclosure of government grants received by business entities. Under ASU 2025-10, a government grant is recognized only when it is probable the business will meet the grant's conditions and will receive the grant, and when it meets the recognition criteria for either an asset-related or income-related grant. The update permits either a cost-accumulation or deferred-income approach for asset-related grants, while income-related grants must be recognized systematically over the related expense periods. Entities must also present grant-related income appropriately and disclose the nature of the grants, the accounting policies applied, and significant terms and conditions. ASU 2025-10 is effective on December 15, 2028 for all public entities, with early adoption permitted. The adoption of ASU 2025-10 is not expected to materially impact the Company's consolidated financial statements.