What the WEP Actually Does to Your Benefit Formula

The Windfall Elimination Provision replaces the standard 90% factor on your first AIME bend point with a reduced factor, anywhere from 40% to 85%, depending on your years of substantial Social Security-covered earnings.

Here is the standard Social Security benefit formula for 2025, without the WEP:

• 90% of the first $1,226 of your Average Indexed Monthly Earnings (AIME)
• 32% of AIME between $1,226 and $7,391
• 15% of AIME above $7,391

The WEP replaces that 90% with a lower percentage. If you have fewer than 21 years of substantial covered earnings, the factor drops to 40%. The closer you get to 30 years of substantial earnings, the closer that factor returns to 90%. At exactly 30 years, the WEP no longer applies.

The maximum WEP reduction equals the difference between 90% and 40% of the first bend point: (90% - 40%) x $1,226 = $613. The SSA then caps the actual reduction at 50% of your non-covered pension. In 2025, the published maximum WEP reduction is $587/month after applicable adjustments.

The Substantial Earnings Threshold Over Time

The SSA defines "substantial earnings" differently by year. For 2025, the threshold is $31,275 in Social Security-covered wages. For 2024, it was $30,750. For 2000, it was $17,475.

You must count only years in which you met or exceeded the threshold for that specific year. Years in which you paid into Social Security but did not meet the threshold do not count toward your substantial earnings total. The SSA publishes the full table in its WEP Fact Sheet. You can confirm each year's threshold using your Social Security Statement, available at ssa.gov.

Years of substantial earnings determine your WEP factor:

• 20 or fewer years: 40%
• 21 years: 45%
• 22 years: 50%
• 23 years: 55%
• 24 years: 60%
• 25 years: 65%
• 26 years: 70%
• 27 years: 75%
• 28 years: 80%
• 29 years: 85%
• 30 or more years: 90% (no WEP reduction)

Worked Example 1: Teacher with 18 Years of Covered Earnings

A retired Texas public school teacher receives a $2,800/month pension from the Teacher Retirement System of Texas, which is not covered by Social Security. She also worked 18 years in Social Security-covered employment. Her AIME from that covered work is $1,900.

Standard formula (no WEP):

• 90% x $1,226 = $1,103.40
• 32% x ($1,900 - $1,226) = 32% x $674 = $215.68
• Total Primary Insurance Amount (PIA) = $1,319.08

WEP-adjusted formula (18 years = 40% factor):

• 40% x $1,226 = $490.40
• 32% x $674 = $215.68
• WEP-adjusted PIA = $706.08

The WEP reduces her monthly benefit by $613.00 before the 50% cap check. Her non-covered pension is $2,800/month. Fifty percent of that is $1,400. Since $613 is less than $1,400, the full $613 reduction applies.

Her actual monthly Social Security benefit is $706.08, not $1,319.08. Over a 20-year retirement, that difference totals $147,120 in foregone income.

Worked Example 2: State Employee with 27 Years of Covered Earnings

A retired Ohio state employee receives a $1,600/month pension from the Ohio Public Employees Retirement System. He has 27 years of substantial Social Security-covered earnings. His AIME is $3,400.

Standard formula (no WEP):

• 90% x $1,226 = $1,103.40
• 32% x ($3,400 - $1,226) = 32% x $2,174 = $695.68
• Total PIA = $1,799.08

WEP-adjusted formula (27 years = 75% factor):

• 75% x $1,226 = $919.50
• 32% x $2,174 = $695.68
• WEP-adjusted PIA = $1,615.18

The WEP reduction here is $183.90/month. The 50% pension cap check: 50% x $1,600 = $800. Since $183.90 is less than $800, the full reduction applies.

His actual monthly benefit is $1,615.18. The WEP costs him $183.90/month, or $2,206.80 per year. Over 20 years, that is $44,136. Still significant, but the 27 years of substantial earnings kept the damage contained.

The 50% Pension Cap: When It Limits the WEP Reduction

The WEP reduction cannot exceed 50% of your non-covered pension in the month you become eligible. This cap protects lower-income pension holders.

If your non-covered pension is $900/month, the maximum WEP reduction is $450/month, regardless of your years of substantial earnings or your AIME. For someone with fewer than 21 years of covered earnings who would otherwise face the full $587 reduction, a $900 pension actually limits the damage to $450.

To check whether the cap applies: divide your monthly non-covered pension by 2. If that result is less than the calculated WEP reduction from the formula, use the smaller (capped) number.

What the WEP Does Not Affect

The WEP applies only to your own retired worker or disability benefit. It does not reduce survivor benefits paid to your spouse or dependents. It also does not apply to Supplemental Security Income (SSI) payments.

The Government Pension Offset (GPO) is a separate provision that reduces spousal and survivor Social Security benefits for those receiving non-covered government pensions. Many retirees confuse the two. WEP affects your own earned benefit. GPO affects derivative benefits you would collect based on a spouse's record.

How to Pull the Exact Inputs You Need

Your AIME does not appear directly on your Social Security Statement. The SSA calculates it from your indexed covered earnings history. To estimate it yourself, pull your earnings record from ssa.gov, apply the SSA wage indexing factors for each year, average the highest 35 years, and divide by 12.

For most people, the faster path is to use the SSA's WEP calculator at ssa.gov/planners/retire/wep.html or run the figures through a retirement calculator that applies the WEP formula directly.

Run Your WEP-Adjusted Estimate Before You File

Filing at 62 with an incorrect benefit estimate can result in permanent reduction of your Social Security income. Social Security applies the WEP reduction before calculating your early-filing reduction or delayed retirement credits. An overestimated PIA locked in at 62 compounds into a permanent shortfall.

The CalcMoney retirement calculator applies the WEP factor, the 50% pension cap, and your filing age reduction in sequence. Enter your AIME, your years of substantial earnings, and your non-covered pension amount. The calculator returns your WEP-adjusted PIA and projects your cumulative lifetime benefit at every filing age from 62 to 70.

Calculate your WEP-adjusted Social Security benefit now →

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Results are estimates for informational purposes only. Consult a licensed financial professional before making financial decisions.