Title 5 › Part III— EMPLOYEES › Subpart G— Insurance and Annuities › Chapter 84— FEDERAL EMPLOYEES’ RETIREMENT SYSTEM › Subchapter II— BASIC ANNUITY › § 8421
People who get certain annuities under the federal retirement rules also get a monthly annuity supplement while they remain eligible. Some annuity types only qualify if the person is at or above the minimum retirement age for them. No supplement is paid if the annuity does not start before the person is 62. The supplement stops after the last day of the month before the first month the person would be eligible for Social Security old‑age benefits if they applied, but in any case it ends no later than the last day of the month in which they turn 62. Each month’s supplement equals the Social Security old‑age benefit the person would get at age 62 (figured under special rules) multiplied by a fraction equal to the person’s years of service divided by 40. Years of service are rounded to the nearest whole year, with a half year rounded up, and the numerator cannot exceed 40. The Social Security amount is calculated as if the person were fully insured on January 1 of the year their supplement starts, counts only basic pay as earnings, treats some years after separation as zero earnings, and applies the maximum reduction under section 202(q) for people born in the same year. “Benefit computation year,” “average total wages of all workers,” and “service” are defined under the Social Security rules, and “service” does not include military service. For accounting under section 8467, this supplement is treated the same as amounts figured under section 8415.
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Government Organization and Employees — Source: USLM XML via OLRC
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Reference
Citation
5 U.S.C. § 8421
Title 5 — Government Organization and Employees
Last Updated
Apr 3, 2026
Release point: 119-73not60