StacksVerified U.S. regulatory reference

5 CFR §839.903

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Except for the last 3 years, the money you erroneously paid into Social Security will remain to your credit in the Social Security fund. The Social Security Administration will include all but those last 3 years in determining your eligibility for, and the amount of, future benefits.
  2. (b)The amount you paid into Social Security for the last 3 years will be used to help pay your CSRS retirement deductions.