Intro
If you’re retiring from federal service before age 62, the FERS Supplement is often the single reason the numbers work. It bridges the gap between your retirement date and the day Social Security opens up — usually adding $700 to $2,000 per month to your income. For many federal retirees, it’s the difference between “I can retire now” and “I need to work another three years.”
But the FERS Supplement comes with a rule most retirees underestimate: the earnings test. If you earn income after retiring — from a second career, consulting, part-time work, or even a side business — some or all of that FERS Supplement can disappear. The rule surprises people every year, and by the time they see it in their annuity statement it’s too late to unwind.
This guide walks through exactly how the earnings test works, when it kicks in, how much income triggers it, and what federal retirees typically do to plan around it.
What the FERS Supplement is (and isn’t)
The FERS Supplement — technically the Special Retirement Supplement — is a payment for eligible FERS retirees who leave federal service before age 62. It approximates the Social Security benefit you’ll receive at 62 based on your years of federal service, and it stops the month you turn 62 regardless of whether you actually file for Social Security.
Who’s eligible:
- FERS employees retiring under an unreduced immediate annuity at their Minimum Retirement Age with 30 years of service (or 20 years at 60)
- Special-category employees like law enforcement, firefighters, and air traffic controllers who retire at 50+
- FERS employees offered discontinued service or early-out retirement in certain workforce reduction scenarios
Who isn’t eligible:
- MRA+10 retirees (retiring at your Minimum Retirement Age with 10+ years but under 30)
- Deferred retirees
- Employees who resigned and drew a delayed annuity
- CSRS-only employees (CSRS has no equivalent)
How the earnings test actually works
Once you’re receiving the FERS Supplement, OPM applies an earnings test each year starting the year after your retirement. It works like Social Security’s earnings test, and shares the same annual threshold.
Two thresholds matter:
The exempt amount. For 2026, the Social Security earnings test exempt amount is around $23,400 (it adjusts each year with wage inflation — check the OPM or Social Security site for the current number). Earnings up to this threshold don’t affect your FERS Supplement at all.
The reduction rate. Every $2 you earn above the exempt amount reduces your annual FERS Supplement by $1. There’s no cap. If you earn enough, the entire Supplement can be reduced to zero.
Here’s what that looks like in practice.
Example 1: The consulting retiree. Anna retires from federal service at 58 under an unreduced FERS annuity with a $1,400/month Supplement ($16,800/year). In her first full year of retirement she consults part-time and earns $60,000. Her earnings over the exempt threshold: $60,000 – $23,400 = $36,600. Her Supplement reduction: $36,600 / 2 = $18,300. That’s more than her entire annual Supplement — so her Supplement is reduced to zero for that year.
Example 2: The part-time federal-adjacent worker. Mike retires at 60, receives a $900/month Supplement ($10,800/year), and works part-time earning $32,000. Earnings over threshold: $32,000 – $23,400 = $8,600. Reduction: $8,600 / 2 = $4,300. His annual Supplement drops to $10,800 – $4,300 = $6,500 for that year.
Example 3: The threshold-conscious retiree. Sarah retires at 57, earns $22,000 the following year from part-time bookkeeping, and stays below the threshold. Her FERS Supplement pays out in full.
What counts as earnings — and what doesn’t
The rule catches a lot of retirees because “earnings” isn’t as intuitive as it sounds.
What counts:
- W-2 wages from any employer, including working for a federal contractor
- Self-employment income (subject to the same Social Security earnings-test rules)
- Consulting fees
- Any earned income reported on your Schedule SE
What doesn’t count:
- Your FERS annuity (obviously)
- TSP withdrawals
- IRA and 401(k) withdrawals
- Social Security benefits (once they start)
- Pension income from other employers
- Investment income — dividends, interest, capital gains
- Rental income (usually — check with your accountant if you’re a real estate professional)
- Distributions from an S-corp (this one has nuances — consult a tax professional if this is your situation)
This last category is where planning matters. A retiree who lives on TSP withdrawals and their annuity while their Supplement pays out — and who limits any consulting to under the threshold — keeps the Supplement fully intact.
When OPM applies the reduction
This is where retirees often get blindsided. OPM doesn’t reduce your Supplement in real time. The reduction is applied the year AFTER you earn the income.
Here’s the timeline:
- You retire mid-year and start receiving the FERS Supplement.
- In year one (partial year after retirement), earnings don’t count against your Supplement.
- In year two (your first full year of retirement), you may earn income.
- In year three, OPM asks you to report your year-two earnings (typically through a form they send in April).
- Any reduction is applied to your year-three Supplement payments — not year two.
The practical effect: if you have a great year of consulting income while collecting the Supplement, the check-back doesn’t hit until 12 to 18 months later. Some retirees are surprised when their annuity drops the following year even though their earnings pattern has changed.
Common planning mistakes
Assuming the earnings test is trivial. For someone earning $50,000+ in a second career, the earnings test frequently reduces the FERS Supplement to zero. That’s real money — $1,000 or more per month.
Not knowing the difference between “earned” and “unearned” income. The retiree who lives entirely on TSP and IRA withdrawals with a $500,000 nest egg pays no earnings test penalty. The retiree who takes a $60,000 consulting job to “stay busy” loses their entire Supplement. Same total income, radically different Supplement outcome.
Retiring on the last day of the calendar year. Some retirees do this to maximize their unused annual leave payout, but a full year’s W-2 income from your federal job counts as earnings for the year you retire — with the exception that OPM excludes federal earnings prior to retirement from the FERS Supplement earnings test. This detail is worth confirming with OPM for your specific situation.
Ignoring the Supplement in “should I take this job?” decisions. A $65,000 consulting engagement that also costs you $18,000 in reduced Supplement is really worth $47,000. It changes the math substantially.
Planning around the earnings test
Federal retirees who want to work in retirement without losing their FERS Supplement generally choose one of these paths.
Stay under the threshold. For 2026 that’s around $23,400. Many retirees intentionally cap their part-time or consulting income at the threshold to keep their full Supplement.
Wait until age 62. The Supplement stops at 62 anyway. Some retirees who want a second career simply take the first few years of retirement to travel or focus on family, then start earning meaningfully at 62 when the earnings test no longer applies.
Structure income to be “unearned.” Investment income, TSP and IRA withdrawals, rental income, and pension income from prior employers don’t trigger the earnings test. Retirees with significant investment assets often bridge the pre-62 years primarily on unearned income.
Convert to S-corp distributions. For consultants building a small business, structuring earnings as S-corp distributions (rather than W-2 or 1099 income) can — with correct legal and tax setup — reduce earned income while maintaining pass-through profits. This requires professional help and has to be done correctly to withstand IRS scrutiny.
What we tell federal retirees at Stonebridge
Every FERS retiree planning to work in retirement should model both scenarios before making the decision: keep the Supplement intact vs. work above the threshold and lose all or part of it. The right choice depends on the total after-tax value of the working income, how many years remain until age 62, and how much the Supplement contributes to the retirement budget.
The FERS Supplement Calculator on this site estimates your monthly Supplement based on your projected earnings. Combining that with an earnings-test scenario can turn a fuzzy decision into a clean number.
If you want to see the full picture — Supplement, earnings test, TSP withdrawal timing, and how it all interacts with Social Security at 62 — a personalized Federal Retirement Report walks through it for your specific situation. There’s no charge and no obligation.
The FERS Supplement is a benefit worth understanding before you leave federal service, not after. The earnings test is the part most retirees underestimate.