Social Security uses your 35 highest-earning years to calculate your monthly payment

The Social Security Administration (SSA) looks back at your entire work history and picks out your 35 years with the highest earnings. If you worked fewer than 35 years, they count the missing years as zero. They adjust each year's earnings for inflation so that $20,000 earned in 1990 counts fairly against $20,000 earned in 2020. Then they average those 35 years together and divide by 12 to get a number called your Primary Insurance Amount (PIA) — this is the foundation of what you'll receive.

The SSA doesn't take your actual dollar amounts and divide them straight across. Instead, they apply a formula with three "bend points" — thresholds where the percentage of your earnings that counts toward benefits drops. The first portion of your average earnings counts at a higher rate than the second, and the second at a higher rate than the third. This structure means lower-income workers get a larger percentage of their earnings replaced by Social Security, while higher-income workers get a smaller percentage.

Key Takeaways

  • The SSA counts your 35 highest-earning years; years you didn't work count as zero, which lowers your average.
  • Earnings are adjusted for inflation before calculation so that older years of work count fairly against recent years.
  • A three-tier formula applies different percentages to different portions of your average earnings, replacing a larger share for lower-income workers.
  • Your age when you claim determines your final monthly payment — claiming at 62 reduces it, claiming at 70 increases it.
  • Spousal benefits, survivor benefits, and government pension offsets can all change what you actually receive.

The 35-year work history and how missing years affect your benefit

Social Security requires 40 credits to be insured for retirement benefits — roughly 10 years of work at current earnings levels. But the payment calculation itself looks at 35 years. If you worked 40 years, the SSA throws out your five lowest-earning years and uses the 35 best ones. If you worked only 20 years, they count those 20 years and add 15 zeros, which significantly reduces your average.

This is why people who took time out of the workforce — to raise children, care for a parent, or recover from illness — often see lower benefits than they expected. Each year you didn't work is a zero in the calculation. Some people can request deemed wages for certain periods (military service, for example), but most gaps simply lower the average. If you're considering working longer before claiming, adding even one or two higher-earning years can replace low-earning or zero years and raise your benefit.

How earnings are adjusted for inflation before the calculation

The SSA uses a process called wage indexing to make sure that $15,000 earned in 1985 counts fairly against $60,000 earned in 2020. They index (adjust) each year's earnings up to the year you turn 60, using the average wage index for the nation that year. After age 60, earnings are counted at their actual dollar amount with no further adjustment.

This means your early career earnings are scaled up to reflect wage growth over time, so the calculation doesn't unfairly penalize you for working when wages were lower. The bend points themselves — the dollar thresholds in the benefit formula — also change each year based on the national average wage index. This keeps the formula relevant as wages rise across the economy.

The bend point formula that determines your Primary Insurance Amount

Once the SSA has your average indexed monthly earnings (AIME), they apply the bend point formula. For 2024, the formula works roughly like this: you receive 90% of the first $1,174 of your AIME, then 32% of earnings between $1,174 and $7,078, then 15% of earnings above $7,078. These dollar amounts change each year. The bend points are designed so that a worker who earned the minimum wage their whole life gets a higher percentage of their earnings replaced than a high-income earner.

The result of this formula is your Primary Insurance Amount (PIA) — your full retirement age benefit. This is the number the SSA uses as the starting point before any reductions for early claiming or increases for delayed claiming. If you were born in 1960 or later, your full retirement age is 67. If you were born earlier, it's between 65 and 67 depending on your birth year.

How your claiming age changes your monthly payment

Your Primary Insurance Amount is what you receive if you claim at your full retirement age. Claim before that age, and your benefit is permanently reduced. Claim after, and it increases. The reduction for early claiming is roughly 6.67% per year before full retirement age, though the exact percentage depends on how many months early you claim. If your full retirement age is 67 and you claim at 62, you lose about 30% of your benefit for life.

Delayed claiming works the opposite way. For each year you wait past your full retirement age, your benefit increases by about 8% per year, up to age 70. Someone with a full retirement age of 67 who waits until 70 receives roughly 24% more per month than they would have at 67. This higher payment also lasts for life, and it affects any survivor benefits your family may receive.

Spousal and survivor benefits based on your record

If you're married, your spouse may be able to receive a benefit based on your work record — up to 50% of your Primary Insurance Amount if they claim at their full retirement age. If you pass away, your widow, widower, or ex-spouse (if married 10+ years) can receive survivor benefits. Your children under 19 (or 19 if still in high school) can also receive benefits on your record.

These benefits don't reduce your own payment. However, the total amount the SSA will pay to your entire family is capped at roughly 150% to 180% of your Primary Insurance Amount, depending on your family structure. If multiple family members claim on your record, the SSA divides that family maximum among them, which can reduce what each person receives.

Government Pension Offset and Windfall Elimination Provision

If you receive a pension from work where you didn't pay Social Security taxes — such as some government jobs, teaching positions, or foreign employment — two rules may reduce your benefits. The Windfall Elimination Provision (WEP) reduces your own Social Security benefit if you also have a non-covered pension. The Government Pension Offset (GPO) reduces or eliminates spousal or survivor benefits you can receive on someone else's record.

These rules are complex and depend on when you were born, when you started the non-covered job, and how much your pension is. If you have any non-covered pension, contact the SSA directly to understand how it affects your specific situation. The reduction is not automatic — the SSA applies it only if the rules apply to you — but many people are surprised to find their benefit is lower than expected because of a pension they forgot to mention.

Frequently Asked Questions

What if I didn't work 35 years?

The SSA counts each year you didn't work as a zero in your 35-year average. If you worked 30 years, they add five zeros, which lowers your average earnings and your benefit. You can still receive Social Security with fewer than 35 years of work, but your payment will be reduced compared to someone with a full 35-year history at the same earnings level.

Does working longer actually increase my benefit?

Yes, if your recent earnings are higher than your lowest-earning years in the 35-year calculation. Adding a higher-earning year can replace a zero or a low-earning year, raising your average. However, if you're already at 35 years and your new earnings are lower than your current lowest year, working longer won't help.

Can I see my estimated benefit before I claim?

Yes. You can create an account at ssa.gov and view your Social Security Statement, which shows your earnings history and estimated benefits at different claiming ages. The SSA also mails statements to people not yet receiving benefits. These estimates assume you continue working at your current pace until you claim.

How much does claiming at 62 instead of 67 reduce my benefit?

The reduction is roughly 30% for someone with a full retirement age of 67. The exact percentage depends on your birth year and the number of months between your claiming age and full retirement age. This reduction is permanent — you receive the lower amount for life, even if you live into your 90s.

What happens to my benefit if I'm still working when I claim?

If you claim before your full retirement age and earn above a certain amount (roughly $23,400 in 2024), the SSA withholds $1 in benefits for every $2 you earn above that limit. Once you reach full retirement age, there's no earnings limit. The withheld benefits aren't lost — the SSA recalculates your benefit at full retirement age to account for the months they withheld payment.