GPO Calculator: How to Use It
The Government Pension Offset cuts spousal and survivor Social Security benefits by two-thirds of a government pension. For many retirees, it wiped the benefit out entirely. The Social Security Fairness Act of 2025 eliminated it.
What this calculator does
The GPO Calculator computes the reduction to your spousal or survivor Social Security benefit caused by the Government Pension Offset. It applies the two-thirds rule to your monthly government pension and shows whether any spousal or survivor benefit remains after the offset. It also shows the comparison between the pre-GPO benefit you would have received and the post-GPO amount.
Because the Social Security Fairness Act of 2025 eliminated GPO, the calculator also shows what your benefit looks like under current law. If you were receiving a reduced benefit due to GPO, you're entitled to an increased benefit going forward and potentially retroactive payments.
What each input means
Monthly government pension amount
The gross monthly benefit from the government employer that didn't withhold Social Security taxes. For most people, this is a CSRS pension, a state teacher retirement pension, or a local government pension. Use your gross monthly benefit before any deductions for taxes, health insurance, or survivor benefit elections.
If you have multiple non-covered pensions, total them. GPO applies to the combined amount. If you haven't started your pension yet, use your estimated monthly benefit at the age you plan to start it.
Spousal or survivor Social Security benefit
This is the benefit based on your spouse's earnings record, not your own. Spousal benefits are up to 50% of a living spouse's Primary Insurance Amount at FRA. Survivor benefits are up to 100% of a deceased spouse's benefit. Find these figures on your Social Security Statement or by calling SSA at 800-772-1213.
If your spouse hasn't claimed yet, SSA estimates the eventual spousal benefit based on projected earnings. The statement at ssa.gov/myaccount shows current estimates.
How the GPO reduction works
Two-thirds of your monthly government pension is subtracted from your spousal or survivor Social Security benefit. If two-thirds of the pension exceeds the Social Security benefit, the Social Security benefit goes to zero. There's no refund or credit for the excess.
Example: $1,500/month CSRS pension. Two-thirds is $1,000. If the spousal Social Security benefit is $800, GPO eliminates it entirely. If the spousal benefit is $1,200, $200 remains. The $200 is then subject to any other reductions (like claiming early).
GPO vs. WEP: the distinction
GPO and WEP are frequently confused. WEP reduces your own Social Security retirement benefit if you receive a non-covered pension. GPO reduces spousal or survivor benefits. They can both apply to the same person. A retired teacher with a state pension and Social Security from earlier private-sector work might face WEP on their own retirement benefit and GPO on any spousal benefit from a spouse's covered earnings.
The Social Security Fairness Act
Congress passed and President Biden signed the Social Security Fairness Act in January 2025, eliminating both WEP and GPO. If you were subject to GPO, your spousal or survivor benefit should now be paid in full, and SSA owes you retroactive payments back to January 2024. Implementation has been rolling out through 2025. If you haven't received a notice from SSA, contact them directly.
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Frequently asked questions
What is the Government Pension Offset?
GPO reduces spousal or survivor Social Security benefits by two-thirds of a government pension from employment not covered by Social Security. It only affects benefits based on a spouse's earnings record, not your own Social Security retirement benefit.
How is the GPO reduction calculated?
Two-thirds of your monthly non-covered pension is subtracted from your spousal or survivor Social Security benefit. If two-thirds of your pension is $1,000 and your spousal benefit would be $900, GPO eliminates the Social Security benefit entirely.
Does GPO affect my own Social Security retirement benefit?
No. GPO only affects benefits based on a spouse's record. Your own Social Security retirement benefit from your own covered work history is not touched by GPO. WEP is the provision that reduces your own benefit.
Who is subject to GPO?
Workers who receive a pension from non-Social-Security-covered employment (CSRS, many state jobs, some local government) and are also entitled to spousal or survivor Social Security benefits. FERS employees pay into Social Security and are generally not subject to GPO.
Did the Social Security Fairness Act eliminate GPO?
Yes. Signed January 2025, the Act eliminated both GPO and WEP. If you were affected, your full spousal or survivor benefit should now be paid, with retroactive payments back to January 2024. Contact SSA to confirm your updated amount.