The Basic Formula: Your 35 Highest-Earning Years

Social Security takes your earnings record from your entire working life, finds your 35 highest-earning years, and averages them. The result is called your Primary Insurance Amount, or PIA. This is the dollar figure the Social Security Administration uses to calculate what you receive each month.

If you worked fewer than 35 years, Social Security counts the missing years as zero. This means someone with 30 working years will have five zeros averaged in, which lowers the final amount. The agency does not skip the low years — it includes them in the math.

The calculation happens in three steps: first, your past earnings are adjusted for inflation using a wage index; second, those adjusted amounts are averaged; third, a formula called a bend point formula is applied to that average to produce your monthly benefit.

Key Takeaways

  • Social Security uses your 35 highest-earning years to calculate your benefit, and counts any missing years as zero.
  • Your past earnings are adjusted for inflation before being averaged, so a dollar earned in 1990 is not compared directly to a dollar earned in 2020.
  • The bend point formula replaces a higher percentage of lower earnings than higher earnings, which is why the system replaces more of a low-wage worker's income.
  • You can view your own earnings record and estimated benefit on your Social Security account at ssa.gov.
  • Claiming before your full retirement age reduces your monthly benefit permanently, and claiming after increases it.

How Earnings Are Adjusted for Inflation

Social Security does not straightforward add up your raw earnings from 1985, 1995, and 2015 and divide by three. Instead, it adjusts older earnings upward to account for wage growth and inflation. This adjustment is called wage indexing.

The agency uses a national wage index — a measure of average earnings across the entire economy — to scale your past earnings. Your 1985 earnings are multiplied by a factor that reflects how much wages have grown since then. Your most recent years of earnings (typically the last two years before you turn 60) are used at their actual amount, with little or no adjustment.

This means a person who earned $20,000 in 1985 will have that amount adjusted upward to reflect what $20,000 would be worth in the wage economy at the time of calculation. The adjustment is not the same as inflation — it is based on wage growth specifically, which usually outpaces inflation.

The Bend Point Formula and Why It Favors Lower Earners

Once your adjusted earnings are averaged, Social Security applies the bend point formula. This formula replaces a higher percentage of your income if you earned less, and a lower percentage if you earned more.

For someone turning 62 in 2024, the formula works roughly like this: the first portion of your average earnings (up to a certain dollar amount called the first bend point) is replaced at 90 percent. The next portion (between the first and second bend point) is replaced at 32 percent. Anything above the second bend point is replaced at 15 percent. The bend points themselves change each year based on wage growth.

This structure means a low-wage worker might receive a benefit that replaces 50 percent of their pre-retirement income, while a high-wage worker might receive a benefit that replaces 25 percent. The system is designed to provide a larger replacement rate for workers with lower lifetime earnings.

What Happens If You Claim Before or After Full Retirement Age

The calculation above produces your full retirement age benefit — the amount you receive if you claim at your full retirement age, which ranges from 66 to 67 depending on your birth year.

If you claim before full retirement age, your benefit is reduced by a percentage that depends on how many months early you claim. Claiming at 62 (the earliest age) reduces your benefit by roughly 30 percent if your full retirement age is 67. This reduction is permanent — you do not receive a higher amount later.

If you delay claiming past your full retirement age, your benefit increases by 8 percent per year until age 70. Someone born in 1957 with a full retirement age of 66 who waits until 70 receives roughly 32 percent more per month than they would have at 66.

How Work After Claiming Affects Your Benefit

If you claim Social Security before full retirement age and continue working, the Social Security Administration reduces your benefit by $1 for every $2 you earn above an annual limit. In 2024, that limit is $23,400, but it changes yearly.

Once you reach full retirement age, this earnings limit no longer applies. You can earn any amount without a reduction to your benefit. However, if you continue working, your earnings may be high enough to become one of your 35 highest-earning years, which could increase your benefit in the future.

The agency recalculates your benefit each year based on your updated earnings record. If a recent year of work pushes out one of your lower-earning years, your monthly benefit may go up. This recalculation happens automatically — you do not need to request it.

Government Pension Offsets and Windfall Elimination

Two rules can reduce your Social Security benefit if you also receive a pension from work not covered by Social Security — typically government employment.

The Windfall Elimination Provision (WEP) changes the bend point formula for people with non-covered pensions. Instead of replacing 90 percent of your lowest earnings, it may replace 40 percent or less. This reduction applies only to your own benefit, not to benefits you receive as a spouse or widow.

The Government Pension Offset (GPO) reduces spousal and survivor benefits by two-thirds of your government pension. If your government pension is $1,500 per month, your spousal benefit is reduced by $1,000. This can eliminate your spousal benefit entirely if the pension is large enough.

Where to Find Your Earnings Record and Estimate

You can view your actual earnings record and see a benefit estimate without contacting Social Security. Create an account at ssa.gov and log into your Social Security account. The site shows your earnings history year by year, flags any discrepancies, and provides an estimate of your benefit at different claiming ages.

The estimate assumes you continue working at your current pace until you claim. If you plan to retire earlier or later, or if your earnings will change significantly, the estimate will shift. You can adjust the assumed future earnings in the calculator to see how different work scenarios affect your benefit.

If you do not have an online account, you can request a paper statement by calling Social Security at 1-800-772-1213 or visiting a local office. The paper statement takes longer to arrive but shows the same information.

Frequently Asked Questions

Does Social Security count all the years I worked, or just the highest ones?

Social Security counts your 35 highest-earning years. If you worked fewer than 35 years, the missing years count as zero in the calculation. If you worked more than 35 years, the lowest-earning years are dropped from the calculation.

If I earned very little one year, does that hurt my benefit?

Only if that year is one of your 35 highest-earning years. If you have 35 or more years of work, a low-earning year will not be included in the calculation unless it is higher than one of your other years. If you have fewer than 35 years of work, low-earning years do count as zeros, which lowers your average.

Can I see how much my benefit will increase if I wait until 70 to claim?

Yes. Your Social Security account at ssa.gov shows your estimated benefit at ages 62, full retirement age, and 70. The difference between the full retirement age amount and the age 70 amount reflects the 8 percent annual increase for delayed claiming.

What if I made a mistake on my earnings record — can it be fixed?

Yes, but only within a limited time. You can correct earnings from the past three years, three months, and 15 days. For older years, you need documentation from your employer, such as a W-2 or tax return. Contact Social Security directly to report a discrepancy.

Does my spouse's earnings affect my benefit calculation?

No. Your benefit is based only on your own earnings record. Your spouse's earnings do not change your benefit amount. However, you may be able to receive a separate spousal benefit based on your spouse's record, which is calculated differently.