FERS Pension COLA: What Federal Retirees Actually Get

Most FERS employees assume their pension keeps pace with inflation. It doesn't — at least not before age 62, and never at the full CPI rate afterward. Here's exactly what the rules say and what it means for your retirement income.

The FERS "diet COLA" formula

FERS COLAs use the same CPI-W measurement as CSRS and Social Security, but with a cap that produces lower adjustments when inflation is moderate or high:²

In 2026, CPI-W rose 2.8% — squarely in the 2–3% band — so FERS retirees get exactly 2.0% while CSRS retirees receive the full 2.8%. A CSRS retiree on a $80,000 annuity collects $2,240 more in 2026. A FERS retiree on the same annuity receives $1,600 more. The 0.8 percentage-point gap compounds every year.

The age-62 rule: zero COLA before then

The most consequential COLA rule for FERS employees is the age-62 threshold. If you retire at 57 with 30 years of service — one of the most common FERS exit paths — your annuity receives no cost-of-living adjustment for the first five years.³

FERS COLA begins on January 1st of the year after you turn 62. If you turn 62 on November 14, your first COLA is the following January 1st — a 14-month wait after your birthday.

At age 62 the FERS COLA kicks in — but it catches up from the nominal base ($42,000), not from where inflation has pushed purchasing power. The gap created during the pre-62 freeze never closes; it's locked in permanently.

CSRS vs. FERS COLA comparison

The trade-off by design: FERS employees pay less into the retirement system than CSRS employees did (0.8% to 4.4% of salary vs. 7% for CSRS), receive Social Security alongside their annuity, and get a funded TSP with a 5% agency match. In exchange, the annuity COLA is trimmed. CSRS employees paid more, got no SS, and receive a more inflation-protected annuity.

The FERS supplement has no COLA — at all

If you retire before 62 and receive the FERS Special Retirement Supplement, that payment receives zero COLA for its entire duration. No partial adjustment. No diet COLA. Completely flat in nominal dollars from retirement until it ends at your 62nd birthday.²

If you retire at 57 and receive a $1,200/month supplement, you will receive exactly $1,200/month at 61 — but that $1,200 buys meaningfully less in year 5 than year 1. This is an often-overlooked income erosion factor for early FERS retirees.

Exceptions: who gets COLA before 62

FERS disability retirement

Federal employees who retire on disability under FERS receive COLA beginning in the first year of retirement — they are not subject to the age-62 rule. The COLA formula is the same diet COLA after age 62, but starts immediately.⁴

Special category employees (LEO, firefighters, ATC)

Federal law enforcement officers, firefighters, and air traffic controllers who retire under FERS special provisions (typically at age 50 with 20 years, or any age with 25 years) receive COLA from the date of retirement — not from age 62. Their COLA uses the standard FERS diet formula (not full CSRS CPI), but it starts immediately.⁴

This is a significant benefit for LEOs and firefighters who may retire 7–12 years before the standard FERS COLA age-62 threshold.

Survivor annuities

If your surviving spouse receives a survivor annuity after your death, that benefit receives FERS COLAs following the same rules that would have applied to you — including the age-62 rule if applicable, or immediately if you were a special-provision retiree.²

Historical FERS vs. CSRS COLA rates

Note: in high-inflation years like 2022–2023, FERS retirees over 62 received substantially less than full CPI. Over those two years, a CSRS retiree accumulated 14.6% in COLAs; a FERS retiree accumulated 12.6% — a compounded difference that never closes.

The real planning implication: what to do about it

1. TSP as your inflation buffer

Your annuity doesn't keep pace with inflation, but your TSP can. Federal employees with well-invested TSP balances in C/S/I funds have historically seen long-run real returns that substantially outpace inflation. The inflation gap created by a frozen or capped annuity should be part of your TSP distribution strategy: withdraw from TSP to cover real purchasing-power losses in the early years.

2. The Roth conversion window

FERS retirees who retire before Social Security begins (often age 57–67) have a unique low-income window ideal for converting traditional TSP/IRA funds to Roth. Converting during this window locks in lower tax rates on funds that grow tax-free — useful both for inflation protection and for managing IRMAA. See our Roth conversion strategy guide for the mechanics.

3. Delay Social Security to maximize your inflation-adjusted income

Social Security's COLA is full CPI-W — no cap, no diet. Every additional year you delay beyond 62 increases your SS benefit by roughly 6–8% (delayed retirement credits). A higher SS benefit means a larger inflation-adjusted income stream for life. For FERS retirees whose annuity only partially tracks inflation, maximizing SS provides the most inflation-protected income in the overall plan.

4. Model the gap explicitly — don't assume it away

Run two scenarios in your retirement projections: one assuming 0% real annuity growth for the first 5 years (age 57–62), then partial COLA after 62; and one assuming 3–4% inflation. The difference in purchasing power at age 80 can exceed $200,000 in total income for a mid-level federal retiree. A federal-benefits specialist models this by income source — annuity, supplement, TSP, SS — each with its own COLA profile.

What this means for your retirement date

If you're on the fence between retiring at 57 vs. 59, consider what two additional years of pre-62 no-COLA exposure means in real terms. Two years at 3% average inflation erodes purchasing power by about 6%. For a $45,000 annuity, that's $2,700/year in lost real value compounding through retirement. The math doesn't necessarily favor staying — higher salary might increase your high-3, and an extra year of TSP contributions could more than compensate — but the COLA gap should be part of the calculation.

The FERS Retirement Calculator lets you model your annuity at different retirement dates to see how service years and high-3 interact. Pair that with an explicit inflation projection to see where the crossover point is.

Sources

1. NARFE — 2026 COLA Set: 2.8% for CSRS and Social Security, 2% for FERS (October 27, 2025). Confirmed at FedWeek and OPM pay notices.
2. OPM CSRS/FERS Handbook Chapter 2 — Cost-of-Living Adjustments (tiered FERS formula, FERS supplement no-COLA rule, survivor annuity COLA rules).
3. OPM FAQ — How is the COLA determined? (CPI-W measurement methodology, FERS vs. CSRS formula, age-62 eligibility rule).
4. OPM — Cost-of-Living Adjustments FAQ (disability retirement COLA exception, special provision employee COLA from retirement date, survivor benefit COLA rules).
5. Government Executive — Federal Retirees Face New COLAs, Premiums and Earnings Limits in 2026 (January 2026).

COLA rates and formula verified against OPM Chapter 2 and NARFE announcements. 2026 FERS COLA: 2.0%; 2026 CSRS/Social Security COLA: 2.8%. Rules established under 5 U.S.C. § 8340 (CSRS) and 5 U.S.C. § 8462 (FERS). Values verified as of May 2026.