How the Windfall Elimination Provision Reduced Social Security Benefits

If you spent part of your career in a job that didn't pay into Social Security, you may have run into the Windfall Elimination Provision, or WEP. For decades, WEP reduced the Social Security retirement or disability benefit of workers who also collected a pension from that non-covered work and had fewer than 30 years of Social Security coverage, substituting a lower percentage for the standard 90% factor in the first bracket of the benefit formula. That provision was repealed in 2025, but understanding how it worked still matters if you're reviewing old benefit estimates, back pay, or just trying to make sense of why your Social Security statement once looked lower than you expected.

What WEP actually changed in the benefit formula

WEP didn't touch the middle or top brackets of the Social Security benefit formula at all — it only replaced the first-bracket 90% factor with a lower percentage, as low as 40%, for workers who had fewer than 30 years of substantial Social Security-covered earnings and who also received a non-covered pension. When WEP was first enacted, that drop to 40% was phased in gradually based on the year someone became eligible for benefits, finally reaching the full 40% for anyone first eligible in 1990 or later.

A worked example: $8,000 in average earnings, three outcomes

The Social Security Administration illustrates WEP using a hypothetical worker with $8,000 in average indexed monthly earnings, or AIME — a figure used purely to show how the math moves, not tied to any real person's benefit. Using 2024 bend points of $1,174 and $7,078, the middle bracket (32% of the AIME between those two points) always contributes $1,889, and the top bracket (15% of AIME above $7,078) always contributes $138 — those two pieces never change no matter how many years of coverage someone has, because WEP only ever touched the first bracket. What changes is the first bracket. A worker with only 20 years of coverage gets the full 40% reduction, so that first slice contributes just $470 instead of $1,056.60, producing a WEP PIA of $2,497. A worker with 29 years of coverage — one year short of being exempt entirely — gets an 85% factor instead, contributing $998 to that first bracket and landing at a WEP PIA of $3,025, much closer to the unreduced number.

How much did WEP actually cost this worker?

To see the size of the hit in dollars, it helps to calculate what this same $8,000-AIME worker would have received without any WEP reduction at all — meaning 30 or more years of coverage. Running the standard formula with the full 90% first-bracket factor produces a PIA of about $3,084. Compare that to the $2,497 WEP PIA for the worker with only 20 years of coverage, and you get a raw reduction of about $587 a month before any caps apply. That $587 figure matters because it is not necessarily the final cut — a separate guarantee limited how much WEP could reduce anyone's benefit, and that cap sometimes produced a smaller reduction than the raw formula difference.

• b1: 1174
• b2: 7078
• aime: 8000
• Formula: 0.90*b1 + 0.32*(b2-b1) + 0.15*(aime-b2)
• Result: 3084.18

Standard PIA calculation using the unreduced 90/32/15 formula and 2024 bend points, for the same $8,000 AIME used in SSA's WEP example.

The guarantee that capped how much WEP could take

SSA's own comparison of three hypothetical workers shows the guarantee in action: after applying the smaller of the raw WEP gap or the guarantee cap, the final benefits came to $921 for Worker A, whose reduction was capped, $1,155 for Worker B, whose full WEP reduction wasn't capped, and $1,609 for Worker C, who had no reduction at all.

Worker	WEP reduction applied	Final Social Security benefit
Worker A (reduction capped at half the pension)	$400	$921
Worker B (full WEP reduction, not capped)	$294	$1,155
Worker C (no reduction)	$0	$1,609

Illustrative SSA example comparing three hypothetical workers: capped WEP reduction, full WEP reduction, and no reduction.

WEP versus GPO: two different rules, two different benefits

It's easy to confuse WEP with its close relative, the Government Pension Offset, but they applied to different benefits entirely. WEP only affected a worker's own retirement or disability benefit — the one based on that person's individual earnings record. A separate rule, the Government Pension Offset, governed how a non-covered pension affected spousal or survivor benefits, which are based on someone else's earnings record.

The repeal: what changed in 2025

Both WEP and GPO were repealed by the Social Security Fairness Act, formally H.R. 82, which was signed into law on January 5, 2025. According to the Social Security Administration, these two provisions had reduced or eliminated benefits for more than 2.8 million people who receive a pension based on work not covered by Social Security. The repeal applies retroactively to benefits payable starting in January 2024, meaning the WEP formula described above no longer applies to those months forward. That said, SSA is clear that the increase isn't uniform: depending on the type of Social Security benefit and the size of a person's pension, some people's benefits barely moved while others became eligible for more than $1,000 extra per month.

Who was never affected in the first place

One point worth underlining: not every teacher, firefighter, or police officer saw a raise from the repeal, because not everyone was ever subject to WEP or GPO. SSA notes that about 72% of state and local public employees already pay into Social Security through their jobs and were never affected by either provision, so the 2025 repeal changed nothing for them.

Key takeaways

• WEP only ever modified the first bracket of the Social Security benefit formula, swapping the standard 90% factor for a lower percentage that was phased in by eligibility year — 80% in 1986, 70% in 1987, 60% in 1988, 50% in 1989, and 40% for anyone first eligible in 1990 or later — for those with a non-covered pension and fewer than 30 years of coverage.
• SSA's own comparison of three hypothetical workers shows the WEP guarantee at work: final benefits of $921 after a capped reduction, $1,155 after the full WEP reduction, and $1,609 with no reduction at all.
• WEP and the Government Pension Offset were repealed by the Social Security Fairness Act, signed January 5, 2025, retroactive to benefits payable from January 2024.
• About 72% of state and local public employees already paid into Social Security and were never subject to WEP or GPO, so the repeal did not change their benefits.

Frequently asked questions

If I worked a state job that paid into Social Security, was I ever affected by WEP?

Generally no. About 72% of state and local public employees already work in jobs covered by Social Security and pay Social Security taxes, and SSA says that group was not affected by WEP or GPO and will not see a benefit increase from the repeal.

Sources

• www.ssa.gov
• www.ssa.gov
• www.ssa.gov