The Windfall Elimination Provision, explained for federal employees who also have non-federal work.

The Windfall Elimination Provision is one of the two Social Security adjustments that catches federal employees by surprise. (The other is the Government Pension Offset, which is a separate provision.) WEP applies to a federal employee who has also earned a pension from work not covered by Social Security— typically state or local government work, or work for a foreign government, or certain nonprofit employment. If that describes your work history, WEP can reduce your Social Security retirement or disability benefit.

WEP exists because Social Security’s benefit formula is progressive in a way that advantages low earners. A worker who spent most of their career in low-paid, Social-Security-covered work gets a higher percentage of their pre-retirement earnings replaced than a worker who spent most of their career in higher-paid work. Congress decided that this progressivity should not also apply to workers who also have a non-covered pension, because that pension effectively replaces the earnings that Social Security’s progressivity was meant to address.

How WEP changes the Social Security formula.

Social Security’s Primary Insurance Amount (PIA) is calculated using a three-bend-point formula. The first bend point is applied at a 90% replacement rate, the second at 32%, and the third at 15%. The 90% rate is the most generous, and it is the rate that WEP changes.

For a worker affected by WEP, the 90% first-bend-point rate is replaced with a flat 40% rate. The 32% and 15% rates are unchanged. The effect is to reduce the PIA — and therefore the monthly Social Security benefit — for workers whose career average earnings fall in the first bend point.

The dollar cap and the proportionality rule.

WEP includes a maximum reduction and a proportionality adjustment. The maximum reduction is generally the lesser of 50% of the non-covered pension or a published dollar amount that is adjusted annually. For 2026, the published maximum is set by Social Security and applies to all affected beneficiaries.

The proportionality rule is the part most federal employees find counterintuitive. WEP’s effect is scaled by the share of the worker’s career that was in Social-Security-covered employment. A worker with 30 years of substantial Social Security coverage gets a smaller WEP reduction than a worker with 10 years of substantial coverage. After 30 years of substantial coverage, WEP does not apply at all.

Who is most likely to be affected.

The federal employees most likely to see WEP apply are those who also have:

• A state or local government pension from work not covered by Social Security (often referred to as a “non-SS-covered” public pension).
• A pension from work for a foreign government or international organization not covered by U.S. Social Security.
• A pension from certain nonprofit or religious organizations that opted out of Social Security coverage.

A federal employee with a single, continuous federal career has nothing to worry about from WEP. Federal employment is covered by Social Security under FERS. The Social Security benefit that a career FERS employee earns is calculated normally, and WEP does not apply.

What WEP does not touch.

WEP applies only to Social Security retirement and disability benefits based on the affected worker’s own earnings record. It does not apply to benefits paid to the worker’s spouse based on the worker’s record (those are governed by a different set of rules). WEP also does not reduce the federal FERS annuity, the FERS supplement, FEHB, FEGLI, or any other federal benefit. It is a single, narrow adjustment to a single federal benefit.

The Social Security statement and the WEP disclosure.

Social Security publishes an annual statement to every worker age 60 and older, available through the my Social Security portal. The statement includes a personalized estimate of the WEP reduction, if any, based on the non-covered pension the worker has reported. The estimate is a projection, not a guarantee, but it is usually close to the actual reduction applied at claim.

For workers who have not yet claimed Social Security, the WEP disclosure on the statement is the cleanest way to estimate the impact. For workers who have already claimed, the benefit verification letter from Social Security shows the actual reduction being applied each month.

How to plan around WEP.

Planning around WEP is not glamorous, but it is real. The most useful steps for a federal employee with a non-covered pension are:

• Confirm whether your non-federal pension is from Social-Security-covered or non-covered employment. The answer is in your Social Security statement and in your pension plan’s documentation.
• Check your years of substantial Social Security coverage. WEP scales by years of substantial coverage, and 30 years exempts the worker entirely.
• Use the my Social Security portal to view your personalized WEP estimate. The estimate is the closest available answer to “how much will my Social Security benefit be reduced?”
• Coordinate the timing of your Social Security claim with your FERS retirement and your non-covered pension. WEP applies regardless of when you claim, but the cumulative effect on lifetime benefits depends on the claiming age.

For more on how WEP interacts with spousal and survivor benefits, and on the related Government Pension Offset, read what the Government Pension Offset (GPO) is.