FERS Special Retirement Supplement: Eligibility, Calculation, and the 2026 Earnings Test

The FERS Supplement is one of the most valuable — and most misunderstood — benefits in federal retirement. It can pay $1,000 to $2,500+ per month from the day you retire until you turn 62. But get the earnings test wrong, and you could lose most of it without realizing it until months later.

What the FERS Supplement is (and why it exists)

When you retire early from federal service under FERS, you're entitled to your pension immediately. Social Security, however, doesn't start until at least age 62. That gap — often 5 to 10 years — is where the FERS Special Retirement Supplement (SRS) comes in.

The supplement approximates the Social Security benefit you've earned through your FERS-covered service, paid monthly by OPM from your retirement date until your 62nd birthday. It's not Social Security — it's a separate OPM payment designed to make the income picture roughly comparable to what you'd have if SS started earlier.

A federal employee who retires at 57 with 30 years of FERS service might receive $1,400–$1,800/month from the supplement for five years — roughly $84,000–$108,000 in total before Social Security begins. That's real money, and it changes every financial planning decision you make about your TSP.

Who qualifies — and who doesn't

The supplement is only available to FERS employees who retire under an immediate, unreduced annuity before age 62. That's a narrower category than most people assume.

Eligible

• MRA + 30 years: Retire at your Minimum Retirement Age (MRA) with at least 30 years of creditable service. Supplement starts immediately.
• Age 60 + 20 years: Retire at 60 with at least 20 years of creditable service. Supplement starts immediately.
• Special category employees: Law enforcement officers (LEOs), firefighters, and air traffic controllers who meet their special retirement eligibility (typically age 50 with 20 years, or 25 years at any age). Supplement starts at retirement.
• VERA (Voluntary Early Retirement Authority): Agency-offered early-out retirement. Supplement is payable, but it doesn't start until you reach your MRA.

Not eligible

• MRA+10 retirees: If you retire at your MRA with 10–29 years of service, your annuity is reduced 5% for each year under age 62. No supplement — this is not an "immediate unreduced" annuity.
• Deferred retirees: Left federal service before meeting retirement age minimums and will collect the pension later. No supplement.
• Age 62+ at retirement: Already eligible for Social Security. No supplement needed (and none paid).
• CSRS employees: CSRS is not FERS. No supplement. (CSRS already has a higher annuity formula to compensate for the lack of Social Security coverage.)

How to calculate your supplement

The formula is straightforward. What's less obvious is where to get the SS benefit estimate you need as an input.

Formula:

Estimated Social Security benefit at age 62 × (Years of FERS service ÷ 40)

OPM uses "years" rounded to the next higher year (so 29 years and 3 months counts as 30). The SS benefit estimate is what your statement shows for claiming at exactly age 62 — not FRA, not age 70.

Example A: 30-year federal employee

• Estimated SS at 62: $2,000/month
• FERS years: 30
• Supplement: $2,000 × (30 ÷ 40) = $1,500/month
• Annual value: $18,000/year until age 62

Example B: 25-year federal employee retiring at 60

• Estimated SS at 62: $2,200/month
• FERS years: 25
• Supplement: $2,200 × (25 ÷ 40) = $1,375/month
• Annual value: $16,500/year for two years

Where to get your SS estimate

Log into ssa.gov/myaccount and view your Statement. The "age 62" column is the number you plug into the formula. If you haven't created an account, do it — you'll also use this number for your full retirement income modeling.

One nuance: the SSA estimate on your statement assumes you keep working until that age. If you're retiring early at 57, your actual SS at 62 will be slightly lower (fewer high-earning years). OPM uses the statement figure anyway, but plan your SS income conservatively.

The 2026 earnings test: the rule that catches people off guard

The supplement has an earnings test identical in structure to the Social Security retirement earnings test. If you earn wages or self-employment income after retirement, OPM will reduce the supplement if those earnings exceed the annual exempt amount.

2026 exempt amount: $24,480¹

For every $2 you earn over $24,480, your supplement is reduced by $1.

Example: part-time consulting after retirement

• Supplement: $1,500/month ($18,000/year)
• Consulting income: $36,480
• Excess over limit: $36,480 − $24,480 = $12,000
• Reduction: $12,000 ÷ 2 = $6,000/year
• Supplement after reduction: $18,000 − $6,000 = $12,000/year ($1,000/month)

At $44,480 in consulting income — $20,000 over the limit — your $1,500/month supplement is entirely eliminated ($10,000 reduction against $18,000 annual supplement).

What counts as "earned income"

The earnings test applies to wages from employment and net self-employment income. It does not apply to:

• TSP withdrawals or IRA distributions
• Investment income (dividends, capital gains, interest)
• Rental income
• Your FERS annuity itself
• Social Security income

This distinction matters enormously for TSP planning: you can take substantial TSP withdrawals during the supplement years without triggering the earnings test reduction at all.

Timing: the reduction hits a year later

OPM learns about your earnings through an annual survey (the FERS Annuity Supplement Survey) that you submit each spring. If you exceed the limit in 2026, OPM calculates the overage and begins reducing your supplement in July 2027, continuing through June 2028. You won't feel the hit until 13–18 months after the earnings year — but you will feel it.

LEO/firefighter/ATC exception

Special category employees (LEOs, firefighters, air traffic controllers) are exempt from the earnings test until they reach their MRA. This applies even if they retired at 50 on the special retirement provisions. After MRA, the standard test applies.

The supplement ends at 62 — no matter what

OPM terminates the supplement the month you turn 62, regardless of whether you claim Social Security. If you delay SS to 67 or 70, you'll have a gap between when the supplement stops and when SS starts. This gap needs to be filled — typically by TSP withdrawals — and the sizing of those withdrawals is a key planning decision.

The supplement also receives no COLA. Your FERS pension gets an annual cost-of-living adjustment (2.0% for 2026), but the supplement's purchasing power erodes every year it's in payment.

How the supplement changes your TSP strategy

The FERS Supplement has three major implications for how you manage your TSP.

1. The Rule of 55 — don't give it up by rolling over too soon

If you separate from federal service in or after the calendar year you turn 55, you can take distributions from your TSP without the 10% early withdrawal penalty. This "Rule of 55" applies to the TSP directly — it does not automatically transfer if you roll the balance to an IRA.

For a federal employee who retires at 57 with the supplement in place:

• TSP: penalty-free withdrawals available immediately.
• Rolled-to-IRA: withdrawals before 59½ trigger the 10% penalty (unless you qualify for a different exception).

The supplement covers much of your pre-62 income need — but if you need TSP income on top, and you're under 59½, rolling out prematurely costs you a valuable access option. Keep the TSP until at least age 59½ if you need pre-62 flexibility.

2. The Roth conversion window

The years when you receive the supplement — often ages 57 to 62 — are among the most tax-efficient of your financial life:

• FERS annuity is modest (often $35,000–$55,000/year)
• Supplement adds $12,000–$24,000/year
• No Social Security yet
• TSP balance not yet touched (if you don't need to withdraw)

If your total income in this window puts you in the 12% or low 22% federal bracket, you can convert traditional TSP to Roth IRA at those rates. By the time SS starts and RMDs kick in at 73, your traditional balance will be lower — reducing the forced taxable income that could push you into 24–32% territory.

This strategy requires an IRA rollover to enable conversions (TSP doesn't allow in-plan Roth conversions). The rollover itself is not taxable; each subsequent conversion is. Sizing the conversions to stay under the IRMAA threshold ($212,000 modified AGI for married filers in 2026) is an additional constraint.²

3. TSP withdrawals don't trigger the earnings test

As noted above, TSP distributions are not "earned income" under the earnings test. If you're doing Roth conversions or taking supplemental TSP income to cover expenses, you can do this freely without reducing your supplement — as long as you aren't also taking on consulting work or part-time employment that pushes wages over $24,480.

What a fee-only specialist actually models here

The supplement sounds simple — multiply two numbers — but the planning around it is not. A specialist who works with federal employees builds a multi-year projection that shows:

• Supplement amount and duration based on your service history and estimated SS
• Whether consulting income after retirement will partially or fully eliminate the supplement (and whether the after-tax math still makes sense)
• Optimal Roth conversion amounts for each year from retirement to SS start — sized to avoid IRMAA, stay in target bracket, and reduce future RMD exposure
• TSP vs IRA rollover timing relative to Rule of 55 access and conversion goals
• The income cliff at 62 when the supplement terminates, and whether TSP provides the bridge to the SS start date you choose

Each of these decisions compounds: the Roth conversion amounts affect your IRMAA tiers, which affect Medicare costs, which affect the real value of delaying SS. A specialist runs all of this in one model, not in isolation.

1. 2026 FERS Supplement earnings limit $24,480: SSA.gov — Retirement Earnings Test exempt amounts; confirmed by FedTools 2026 supplement earnings limit. Same threshold as Social Security retirement earnings test below FRA.
2. 2026 IRMAA threshold ($212,000 MAGI for MFJ): Medicare.gov — Part B costs.
3. FERS supplement eligibility and formula: OPM — FERS retirement eligibility; OPM — FERS Annuity Supplement Survey FAQ.
4. SECURE 2.0 § 325 — no Roth TSP lifetime RMDs starting 2024; § 107 — RMD age 73 (born 1951–1959) / 75 (born 1960+): SECURE 2.0 Act of 2022, Pub. L. 117-328.

Values verified as of April 2026. IRMAA thresholds and SS earnings test limits adjust annually; confirm for the year you retire.