Prior to 1984, neither federal civil service employees nor Members of Congress paid Social Security taxes, nor were they eligible for Social Security benefits. Members of Congress and other federal employees were instead covered by a separate pension plan called the Civil Service Retirement System (CSRS). The 1983 amendments to the Social Security Act (P.L. 98-21) required federal employees first hired after 1983 to participate in Social Security. These amendments also required all Members of Congress to participate in Social Security as of January 1, 1984, regardless of when they first entered Congress. Because CSRS was not designed to coordinate with Social Security, Congress directed the development of a new retirement plan for federal workers. The result was the Federal Employees’ Retirement System Act of 1986 (P.L. 99- 335).
Members of Congress first elected in 1984 or later are covered automatically under the Federal Employees’ Retirement System (FERS). All Senators and those Representatives serving as Members prior to September 30, 2003, may decline this coverage. Representatives entering office on or after September 30, 2003, cannot elect to be excluded from such coverage. Members who were already in Congress when Social Security coverage went into effect could either remain in CSRS or change their coverage to FERS. Members are now covered under one of four different retirement arrangements:
- CSRS and Social Security;
- The “CSRS Offset” plan, which includes both CSRS and Social Security, but with CSRS contributions and benefits reduced by Social Security contributions and benefits;
- FERS; or
- Social Security alone.