FERS guide
FERS Special Retirement Supplement Explained
The FERS annuity supplement can matter for employees retiring before Social Security age, but eligibility and earnings questions deserve careful source review. Use this guide to separate supplement questions from the basic annuity estimate.
What to gather before you estimate
- Basic FERS annuity estimate
- Retirement type
- Annuity start date
- Expected earnings before Social Security age
- Official source review for current-year limits
Last reviewed 2026-05-01
What to separate from the basic annuity
The basic FERS annuity estimate and the annuity supplement are different planning questions. Start with the basic annuity, then review whether the supplement may apply.
Supplement eligibility can depend on retirement type and timing, so unsupported or special cases should not be guessed from a generic guide.
Why this page avoids stale dollar limits
Earnings-limit amounts can change. This guide does not publish a current-year dollar amount unless the page has a dated source review.
Use official OPM and Social Security source material for final supplement and earnings-test decisions.
Related calculator pages
Independent educational planning content. Not affiliated with OPM. Confirm official retirement and benefit decisions with agency or OPM materials.