Sound Financial Bancorp, Inc.

(a)Evaluation of Disclosure Controls and Procedures.

An evaluation of the Company’s disclosure controls and procedures (as defined in Rule 13a -15(e) under the Securities Exchange Act of 1934 (the “Exchange Act”), as of March 31, 2025, was carried out under the supervision and with the participation of the Company’s principal executive officer and principal financial officer, and several other members of the Company’s senior management. The Company’s principal executive officer and principal financial officer concluded that, as of March 31, 2025, the Company’s disclosure controls and procedures were effective in ensuring that the information required to be disclosed by the Company in the reports it files or submits under the Exchange Act is: (i) accumulated and communicated to the Company’s management (including the Company’s principal executive officer and principal financial officer) in a timely manner, and (ii) recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms.

We intend to continually review and evaluate the design and effectiveness of the Company’s disclosure controls and procedures and to improve the Company’s controls and procedures over time and to correct any deficiencies that we may discover in the future. The goal is to ensure that senior management has timely access to all material financial and non-financial information concerning the Company’s business. While we believe the present design of our disclosure controls and procedures is effective to achieve this goal, future events affecting our business may cause the Company to modify its disclosure controls and procedures.

The Company does not expect that its disclosure controls and procedures will prevent all error and all fraud. A control procedure, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control procedure are met. Because of the inherent limitations in all control procedures, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the Company have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur because of simple errors or mistakes. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the control. The design of any control procedure is also based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions; over time, controls may become inadequate because of changes in conditions, or the degree of compliance with the policies and procedures may deteriorate. Because of the inherent limitations in a cost-effective control procedure, misstatements due to error or fraud may occur and not be detected.

(b)Changes in Internal Control over Financial Reporting.

There were no changes in our internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) that occurred during the three months ended March 31, 2025, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.