5 CFR §839.501
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
If you were moved out of CSRS or CSRS Offset due to a qualifying retirement coverage error and were placed in FERS, you may elect CSRS Offset or remain in FERS. If you were moved out of CSRS or CSRS Offset due to a qualifying retirement coverage error and were placed in Social Security-Only, you may elect CSRS Offset or remain in Social Security-Only. This is summarized in the following chart: