Will my pension affect my Social Security benefit?
If your pension is from a job where you paid Social Security taxes, then it won’t affect your Social Security benefit. However, if your pension is from a job where you did not pay Social Security taxes (such as certain government jobs) two special provisions may apply.
The first provision, called the government pension offset (GPO), may apply if you’re entitled to receive a government pension as well as Social Security spousal retirement or survivor’s benefits based on your spouse’s (or former spouse’s) earnings. Under this provision, your spousal or survivor’s benefit may be reduced by two-thirds of your government pension (some exceptions apply).
The windfall elimination provision (WEP) affects how your Social Security retirement or disability benefit is figured if you receive a pension from work not covered by Social Security. The formula used to figure your benefit is modified, resulting in a lower Social Security benefit.