The FERS Supplement and the Earnings Test: How Working in Retirement Can Shrink Your Check
The FERS Annuity Supplement is one of the most valuable — and most misunderstood — pieces of a federal retirement before age 62. It can be worth well over $1,000 a month. It can also quietly shrink to zero if you take the wrong job after retiring, and plenty of retirees only discover the earnings test after the reduction letter arrives. Here's how it actually works.
What the supplement is
The supplement (formally the FERS Annuity Supplement, often called the Special Retirement Supplement) is a bridge payment that approximates the Social Security benefit you earned during your federal service, paid from retirement until age 62 — when you become eligible for Social Security itself. The standard approximation: take your projected age-62 Social Security benefit, multiply by your years of FERS service divided by 40. An employee with 30 years of FERS service and a projected $2,000 age-62 Social Security benefit would estimate a supplement around $1,500/month.
Three properties worth knowing:
- It ends at 62 no matter what — even if you plan to claim Social Security later. Your income can step down at 62 if you delay claiming; map this in your plan.
- It receives no cost-of-living adjustments. The dollar amount is fixed for the years you receive it.
- It's computed by OPM at finalization — during the current backlog, don't expect it in your first interim payments.
Who gets it — and who doesn't
| Situation | Supplement? |
|---|---|
| Immediate, unreduced retirement: MRA with 30 years, or age 60 with 20 | Yes, from retirement to 62 |
| Special provisions (LEO / firefighter / ATC) retiring on their early eligibility | Yes, from retirement to 62 |
| VERA (early-out) retirement before MRA | Yes, but starting at MRA, not at separation |
| MRA+10 (reduced) retirement | No |
| Retiring at 62 or later | No — you're already Social Security eligible |
The earnings test
The supplement is means-tested against earned income using the same annual exempt amount as the Social Security earnings test (the limit was $23,400 in 2025; it's indexed annually — check SSA for the current figure). The mechanics:
- For every $2 of earned income above the limit, the supplement is reduced by $1.
- Only wages and self-employment income count. Your FERS annuity, TSP withdrawals, investment income, rental income, and a spouse's earnings do not.
- OPM applies the reduction based on an annual earnings survey — meaning the reduction typically shows up the year after the earnings, which surprises people twice: once when nothing happens, and again when it does.
Practical effect: a retiree earning a $70,000 salary in a second career will usually see the supplement reduced to zero. A retiree doing $20,000 of part-time consulting keeps all of it. The zone in between is exactly the kind of thing worth modeling before accepting a job offer, not after.
Scenarios worth comparing before you decide anything
- Second career vs. part-time under the limit. A salary just over the limit can be worth less than it looks once the supplement reduction is netted out. Compare take-home including the supplement effect.
- VERA at 53 vs. waiting to MRA. The supplement's start date moves with that decision — see our VERA framework.
- Income at 62. Supplement ends; Social Security claiming is now a choice (62 vs. later, with permanently different amounts). Chart your income across the transition rather than discovering the step-down live.
See your supplement, tested against your plans
The FedRetireCheck Readiness Report estimates your supplement, shows when it starts and stops under each scenario, and models how planned earnings interact with the test — every figure cited to the governing rule.
Get the $49 report