The Social Security Administration publishes a Windfall Elimination Provision, or WEP, chart at SocialSecurity.gov. The chart shows the maximum amount of reduction of Social Security benefits based on the eligibility year for recipients of windfall payments.
The chart’s maximum reduction amounts depend on the number of years that the worker paid Social Security tax on substantial earnings. For example, a recipient who became eligible in 1990 and paid Social Security tax for 25 years may have his benefit reduced by $89 per month after receiving a windfall payment. Notably, if a worker paid Social Security tax for more than 30 years, the Windfall Elimination Provision does not apply to him and his benefit reduction is zero, no matter what year he became eligible for benefits.