The formula uses your 35 highest-earning years

Social Security calculates your monthly payment by taking your 35 highest-earning years, adjusting them for inflation, and then applying a formula that replaces a percentage of your pre-retirement income. The result is your Primary Insurance Amount (PIA) — the base payment you receive at your full retirement age. If you claim before full retirement age, the payment is reduced. If you delay past full retirement age, it increases.

The calculation happens in stages, and each stage matters. You do not have to do the math yourself — the Social Security Administration (SSA) maintains your earnings record and computes your payment. But understanding how it works helps you see why your payment is what it is, and what happens if you claim at different ages.

Key Takeaways

  • Social Security uses your 35 highest-earning years, adjusted for inflation, to calculate your payment amount.
  • The formula replaces roughly 90% of your first $1,174 in average monthly earnings, 32% of the next $5,900, and 15% of earnings above that (bend points change yearly).
  • Your full retirement age depends on your birth year and ranges from 66 to 67; claiming early reduces your payment, claiming late increases it.
  • The SSA sends you an earnings statement showing your record; you should check it for errors before you claim.

How the SSA builds your earnings record

Social Security tracks your earnings through payroll taxes. Every year you work and pay into the system, the SSA records your gross income (before taxes). If you have fewer than 35 years of earnings, the SSA counts zeros for the missing years — which lowers your average. If you have more than 35 years, the SSA drops your lowest-earning years and keeps only the highest 35.

The SSA adjusts your historical earnings for inflation using a process called wage indexing. This means your 1990 earnings are not compared directly to your 2020 earnings. Instead, the SSA scales your earlier years up to match the wage level of the year you turn 60, so all 35 years are on the same financial footing. After that adjustment, the SSA divides the total by 420 months (35 years × 12 months) to get your Average Indexed Monthly Earnings (AIME).

The bend-point formula that determines your payment

Once the SSA knows your AIME, it applies a formula with three bend points. These are dollar thresholds that change yearly. The formula replaces a high percentage of your first dollars of earnings, a lower percentage of your middle earnings, and an even lower percentage of your highest earnings. This structure means Social Security replaces a larger share of income for lower-wage workers than for higher-wage workers.

For someone turning 62 in 2024, the bend points are $1,174 and $7,078. The formula works like this: take 90% of your AIME up to $1,174, plus 32% of your AIME between $1,174 and $7,078, plus 15% of your AIME above $7,078. Add those three amounts together and you have your Primary Insurance Amount. Bend points are adjusted each year based on wage growth, so the thresholds change annually.

This formula is why two workers with very different earnings histories can end up with different replacement rates. A worker who earned $30,000 a year might replace 40% of pre-retirement income, while a worker who earned $150,000 a year might replace 25%. Both receive real money, but the lower-wage worker's benefit covers a larger slice of what they used to earn.

How your age when you claim affects your payment

Your Primary Insurance Amount is what you receive if you claim at your full retirement age. That age depends on your birth year: people born in 1943–1954 have a full retirement age of 66; those born in 1955 have an age of 66 and 2 months; and those born in 1960 or later have an age of 67. The SSA phases in these changes gradually.

If you claim before full retirement age, your payment is permanently reduced. The reduction is roughly 0.556% per month for the first 36 months before full retirement age, and 0.416% per month for months beyond that. Someone born in 1960 (full retirement age 67) who claims at 62 receives about 70% of their full payment. If you claim at 70, your payment increases by roughly 8% per year beyond full retirement age, up to age 70.

These adjustments are permanent. If you claim at 62 and receive a reduced payment, that reduction stays with you for life. If you delay to 70, your payment is higher for life. The choice between claiming early, at full retirement age, or late depends on your health, family history, and financial needs — there is no single right answer for everyone.

What the SSA sends you before you claim

The Social Security Administration sends you a Social Security Statement (also called a benefit estimate) starting at age 60. This document shows your earnings record, your estimated payment at different claiming ages, and your estimated family benefits if you have dependents. You can also create a my Social Security account online and view your statement anytime.

The statement is important because it gives you a chance to catch errors in your earnings record before you claim. If the SSA has recorded a year of earnings incorrectly or missed a year entirely, you can request a correction. The SSA has a time limit for corrections — generally three years, three months, and 15 days from the end of the year the earnings were reported — so checking early matters. If you spot an error, contact your local Social Security office or call 1-800-772-1213 with your W-2s or tax returns as proof.

How family benefits and survivor benefits use the same calculation

If you are married, divorced, or have dependent children, they may receive benefits based on your earnings record. The SSA calculates a family maximum — usually 150% to 180% of your Primary Insurance Amount — and divides that amount among all family members receiving benefits. Your spouse, ex-spouse, or children do not get the full amount you get; instead, they each receive a percentage of your PIA, and the total cannot exceed the family maximum.

If you die, your family members may receive survivor benefits calculated the same way. Your widow or widower, children under 19 (or 19 if still in high school), and dependent parents can all draw from your earnings record. The family maximum applies here too. Understanding this matters if you are deciding whether to claim early: a reduced payment for you also means reduced payments for any family members drawing on your record.

Why your payment might be different from the estimate

The statement the SSA sends you is an estimate based on the assumption that you continue to work and earn at roughly the same level until you claim. If your earnings change — if you earn more, less, or stop working — your actual payment will differ from the estimate. The SSA recalculates your AIME using your actual earnings history up to the month you claim.

If you work after you start receiving benefits before full retirement age, your payment may be temporarily reduced. For every $2 you earn above an annual limit (the limit changes yearly), Social Security withholds $1 from your benefit. Once you reach full retirement age, this earnings test no longer applies, and you receive your full payment regardless of how much you earn.

Frequently Asked Questions

What if I did not work for 35 years?

The SSA counts zeros for any years you did not work, which lowers your average. If you have only 30 years of earnings, five years count as zero. This is why people who took time out of the workforce — for caregiving, illness, or other reasons — often have lower payments. Some people can drop years of very low earnings if they have more than 35 years of work history.

Can I see the exact bend points for my birth year?

Yes. The SSA publishes bend points for each year on its website under "Primary Insurance Amount Bend Points." Bend points change yearly based on wage growth, so the thresholds that applied when you turned 60 are the ones used in your calculation. You can also call 1-800-772-1213 and ask for your specific bend points.

Does my payment change after I start receiving it?

Your payment increases each year by a Cost of Living Adjustment (COLA) if inflation has occurred. The COLA is based on the Consumer Price Index and is announced in October for the following year. Your payment does not decrease if inflation is negative, but it also does not increase in years with no inflation.

What happens if I made very high income some years and low income other years?

The SSA uses only your 35 highest-earning years. If you had five years of very low earnings and 40 years of higher earnings, the SSA drops the five lowest years. This means high earners who took time off benefit from having those low-earning years excluded from the calculation.

How do I know if my earnings record is correct?

Create a my Social Security account at ssa.gov or request a paper statement by mail. Review the earnings listed for each year against your tax returns or W-2s. If you spot an error, contact Social Security with proof of the correct amount. Errors are most common for self-employed workers or when employers reported earnings incorrectly.