1.7% vs 1% FERS Accrual: Why Firefighter Overtime Skips the Pension

HR leaders know the definition of 'pay' can matter more than the paycheck itself. Federal wildland firefighters who log brutal overtime seasons see bigger checks that barely move their FERS pension—because the high-three calculation excludes overtime and bonuses—while the same hours count toward Social Security. For anyone managing a specialized, high-burnout workforce, this is a case study in why pay classification and total-rewards communication cannot be an afterthought.

Federal wildland firefighters who bank on a punishing Montana fire season to build a bigger retirement are running into a quiet, consequential mismatch: the two systems that measure their work — the Federal Employees Retirement System and Social Security — do not use the same definition of pay. Overtime that may never appear in a FERS pension can still be covered earnings on a Social Security record, and the difference between 'retirement-creditable basic pay' and 'premium compensation' determines whether an exhausting summer of long rolls and night work actually compounds into a larger benefit.

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The catch is the annual taxable maximum: earnings above that ceiling — $176,100 in 2025, rising to $181,800 for 2026 — generate no additional Social Security credit.

The mechanics start with FERS's high-three. A federal pension begins with the worker's highest average basic pay during any three consecutive years of service. The Office of Personnel Management states that the high-three generally excludes overtime and bonuses. That means the extra hours that make a fire-season paycheck look dramatically different from quieter months are, for pension purposes, largely invisible. Firefighters covered by the special retirement provisions do receive an enhanced formula — pension credit accrues at 1.7% per year for the first 20 years of service, compared with the standard 1% FERS rate — but that higher accrual still applies only to retirement-creditable basic pay, not to every dollar earned.

Social Security sits on the other side of the package and applies different rules. The same overtime that FERS excludes can be covered wages on a worker's Social Security earnings record, building future benefits. The catch is the annual taxable maximum: earnings above that ceiling — $176,100 in 2025, rising to $181,800 for 2026 — generate no additional Social Security credit. For a firefighter whose livelihood swings sharply with fire season, that distinction can turn an exhausting summer into a surprisingly productive Social Security year, but only up to the cap. Anyone relying on overtime to lift their eventual benefit should first verify they have not already hit the ceiling through base pay and earlier-season hours.

There is a wrinkle specific to today's wildland workforce. Beginning in 2025, the federal government implemented new special base rates for qualifying wildland firefighters. Those higher rates are basic pay, which means they can improve the eventual high-three and therefore the pension. Fire-incident premium pay, by contrast, is classified as premium compensation rather than retirement-creditable basic pay, so it does not move the pension calculation even though it shows up in the season's take-home pay. In short, the fire season is not entirely invisible to the pension — but only the portion of pay the government has chosen to label 'basic' gets counted.

The embedded sponsor message in the coverage — a pitch for a fiduciary matching service — is itself a reminder of the stakes. The distinction between a fiduciary and a salesperson mirrors the distinction between covered earnings and retirement-creditable pay: what gets counted depends on who is doing the counting and under which rule. A federal employee who assumes every overtime hour builds a bigger pension is making the same category error as an investor who assumes a commission-based product recommendation is objective advice. The Office of Personnel Management's rules are the arbiter for the pension; the Social Security Administration's wage-base rules are the arbiter for the benefit.