FERS Disability Retirement COLA: How Cost-of-Living Adjustments Work

FERS Disability Retirees Get COLA Earlier Than Standard Retirees

Standard FERS retirees do not receive any cost-of-living adjustment on their basic annuity until they turn 62. Disability retirees are an exception. If you retire on FERS disability, your annuity receives COLA adjustments starting after your first 12 months on the disability roll — regardless of your age.

This matters for younger disability retirees. An employee who retires on disability at age 45 would wait 17 years for COLA under standard FERS rules. Under disability retirement rules, they start receiving adjustments in their second year.

During your first 12 months, your annuity is 60% of your high-three average salary (offset by 100% of SSDI). No COLA applies during this period. Starting in month 13, your annuity drops to 40% of your high-three (offset by 60% of SSDI), but COLA adjustments begin accumulating on the 40% base.

How the FERS COLA Formula Works

The FERS COLA formula is less generous than the CSRS or Social Security COLA formula. The adjustment is based on the year-over-year change in the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W), but with a cap:

• If CPI-W increase is 2% or less, FERS COLA equals the full CPI-W increase
• If CPI-W increase is between 2% and 3%, FERS COLA is capped at a flat 2.0%
• If CPI-W increase exceeds 3%, FERS COLA equals CPI-W minus 1 percentage point

For 2026, the CPI-W increase was 2.8%. Under the FERS formula, that translates to a flat 2.0% COLA for FERS retirees. By comparison, CSRS retirees and Social Security recipients received the full 2.8% adjustment.

Over a long retirement, this gap compounds. A FERS disability retiree who spends 15 years on the disability roll before the age-62 recalculation will see their purchasing power erode more than a CSRS retiree receiving the same nominal annuity, because each year's COLA undershoots inflation by the formula's haircut.

COLA and the Age-62 Recalculation

At age 62, OPM automatically converts your disability annuity to a regular FERS retirement benefit. The recalculation uses your original high-three average salary, but with a critical adjustment: OPM increases the high-three by every FERS COLA that was applied during your time on disability retirement.

This means the COLAs you received from month 13 onward do not just protect your current income — they permanently raise the salary base used to calculate your final retirement annuity. The recalculated annuity uses the formula:

Adjusted high-three × total service years × accrual rate

Total service years include your actual federal service plus the years you spent receiving the disability annuity. If that total reaches 20 or more years by age 62, the accrual rate increases from 1.0% to 1.1% per year of service.

What COLA Does Not Apply To

The FERS COLA applies only to your basic annuity — the 40% of high-three amount from month 13 onward. It does not adjust:

• SSDI benefits (Social Security applies its own COLA separately using the full CPI-W increase)
• VA disability compensation (adjusted separately by VA)
• TSP withdrawals or distributions
• FEHB premiums (premiums are set annually during Open Season, not by COLA)

Your total retirement income includes components from multiple sources, each with its own inflation adjustment mechanism. The FERS annuity COLA is just one piece.

Why This Matters for Financial Planning

The FERS COLA cap creates a slow but persistent erosion of purchasing power for disability retirees who spend many years on the disability roll before age 62. An annual 0.8% gap between actual inflation and FERS COLA — which is roughly what the 2026 numbers produce — compounds to roughly a 12% loss of real purchasing power over 15 years.

Disability retirees who want to maintain their standard of living through the pre-62 period typically need supplemental income sources that are not subject to the FERS COLA cap: SSDI (which receives full CPI-W COLA), VA compensation (also adjusted at full CPI-W), TSP growth, or earned income below the 80% earnings limit.

The FERS Disability Retirement Guide includes an annuity estimator that models the COLA accumulation through age 62 and shows how the adjustments feed into the recalculation.

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