This bill, known as the "Congressional Pension Accountability Act," aims to prevent Members of Congress from receiving federal retirement annuities if they are expelled or resign due to serious misconduct. It specifies that all prior congressional service becomes noncreditable for calculating annuities under both the Civil Service Retirement System (CSRS) and the Federal Employees Retirement System (FERS) in such circumstances. This forfeiture applies if a Member is expelled, or if they resign after an investigative subcommittee of the House or Senate Ethics Committee adopts a Statement of Alleged Violation indicating substantial reason to believe misconduct occurred. The bill seeks to enhance accountability for Members by directly impacting their post-service financial benefits. Individuals whose service becomes noncreditable would receive a refund of their personal contributions to the retirement system. However, for those under FERS, all government contributions to their Thrift Savings Plan (TSP) and associated earnings would be forfeited. The legislation clarifies that any annuity payments properly received before the date of expulsion or the ethics committee's finding would not need to be repaid. Furthermore, a presidential pardon or commutation of a criminal sentence would not restore the forfeited annuity, and these provisions apply to acts or conduct committed after the bill's enactment date.