The Basic Formula: Your 35 Highest-Earning Years

Social Security calculates your retirement benefit by looking at your earnings record over your entire working life. The system takes your 35 highest-earning years, adjusts them for inflation to current dollars, and then averages them together. If you worked fewer than 35 years, the formula includes zeros for the missing years, which lowers your average.

Once the Social Security Administration has your average monthly earnings, they explore a formula called the Primary Insurance Amount (PIA). This formula uses three "bend points" — dollar thresholds that change each year. The formula gives you a higher percentage of your earnings up to the first bend point, a lower percentage between the first and second bend point, and an even lower percentage above the second bend point. This structure means lower earners get a higher replacement rate than higher earners.

For 2024, the bend points are $1,174 and $7,078 per month of average indexed monthly earnings. These numbers shift annually based on national wage growth. The exact percentages applied at each bend point are 90%, 32%, and 15%, but these percentages do not change year to year.

Key Takeaways

  • Social Security uses your 35 highest-earning years to calculate your benefit, and years with no earnings count as zeros.
  • Your earnings are adjusted for inflation before being averaged, so older years are brought up to current wage levels.
  • The benefit formula uses bend points that change annually, giving you a higher percentage of lower earnings and a lower percentage of higher earnings.
  • Your full retirement age depends on your birth year and determines when you can receive your full benefit amount without reduction.
  • Claiming before or after your full retirement age permanently changes your monthly benefit — earlier claims reduce it, later claims increase it.

How Earnings Are Adjusted for Inflation

Social Security does not use your actual dollar earnings from 30 years ago. Instead, it adjusts older earnings upward using the National Average Wage Index, a figure published by the Social Security Administration each year. This index reflects the average wage earned by all workers in the United States in a given year.

The adjustment works like this: if you earned $20,000 in 1995, Social Security finds the ratio between the national average wage in 1995 and the national average wage in the year you turn 60. Your 1995 earnings are then multiplied by that ratio to show what they would be worth in current wages. Only earnings up to age 60 are adjusted this way; earnings from age 60 onward are counted at face value.

This indexing means that your benefit calculation reflects your actual earning power relative to other workers in your era, not the nominal dollars you made decades ago. A worker who earned $50,000 in 1990 will have that amount indexed upward significantly, while a worker who earned $50,000 in 2020 will have little or no adjustment.

Your Full Retirement Age and Benefit Reduction

The amount calculated by the PIA formula is your full retirement age benefit — the amount you receive if you claim at your full retirement age. Your full retirement age depends on your birth year and ranges from 66 to 67 for people born between 1943 and 1960. For people born in 1960 or later, full retirement age is 67.

If you claim before your full retirement age, your benefit is reduced. The reduction is 6.67% per year for the first three years before full retirement age, and 5% per year for each year before that. For example, if your full retirement age is 67 and you claim at 62, you lose roughly 30% of your benefit permanently.

If you delay claiming past your full retirement age, your benefit increases by 8% per year until age 70. Someone with a full retirement age of 67 who waits until 70 receives about 24% more per month than they would at 67. This increase continues only until age 70; there is no additional increase for waiting past 70.

How Work History Gaps Affect Your Calculation

The 35-year calculation window is strict. If you worked only 30 years, four zeros are included in your average, which significantly lowers your benefit. Each additional year of earnings you add can replace a zero or a low-earning year, raising your average.

Self-employment income counts toward Social Security the same way wages do, as long as you report it on your tax return and pay self-employment tax. Unpaid work — caregiving, volunteering, or raising children — does not count, even though it may have kept you out of the paid workforce. Some people who took time out for caregiving may be may have access to to credits based on a spouse's or ex-spouse's earnings record, but this is a separate calculation.

If you have a year with very low earnings or no earnings, you can request a Statement of Earnings from the Social Security Administration to verify what they have on record. Errors in your earnings record can be corrected, but you must report them within a specific timeframe. The Social Security Administration website allows you to create an account and view your earnings history online.

Cost-of-Living Adjustments After You Claim

Once you begin receiving benefits, your monthly amount is not fixed forever. Each year, Social Security applies a Cost-of-Living Adjustment (COLA) to all benefits. This adjustment is based on the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) and is announced in October for the following year.

The COLA percentage varies year to year. In recent years it has ranged from 0% (in 2010 and 2011) to 8.7% (in 2023). The adjustment is applied to your benefit starting in January of the following year. This means your benefit grows over time to keep pace with inflation, though the growth rate depends on inflation in the economy rather than on your individual circumstances.

Government Pension Offset and Windfall Elimination Provision

Two rules can reduce your Social Security benefit if you also receive a pension from work not covered by Social Security. The Government Pension Offset (GPO) reduces spousal or survivor benefits if you receive a government pension. The Windfall Elimination Provision (WEP) reduces your own retirement or disability benefit if you have a non-covered pension.

These rules explore mainly to people who worked for federal, state, or local government agencies that did not withhold Social Security taxes. Railroad workers and some other groups are also affected. If you have a non-covered pension, the Social Security Administration will calculate your benefit under WEP, which typically reduces it by up to 50% of your non-covered pension amount, though the reduction cannot exceed 50% of your PIA.

The Social Security Administration publishes a detailed worksheet showing how WEP applies to your specific situation. If you think either rule affects you, you can request a Benefit Estimate that shows the calculation with these provisions included.

How Earnings After Claiming Affect Your Benefit

If you claim Social Security before your full retirement age and continue working, your benefit may be reduced based on your earnings. The Earnings Test applies only before you reach full retirement age. For 2024, if you earn more than $23,400 per year, Social Security deducts $1 from your benefit for every $2 you earn above that threshold.

In the year you reach full retirement age, a different limit applies. For earnings before the month you reach full retirement age, the limit is $62,160 for 2024, and the deduction is $1 for every $3 earned above that amount. Once you reach your full retirement age, no earnings test applies, and you can earn any amount without affecting your benefit.

The Earnings Test does not permanently reduce your benefit. When you reach full retirement age, Social Security recalculates your benefit to account for the months benefits were withheld, which increases your monthly payment going forward. This is different from claiming early, which permanently reduces your benefit.

Frequently Asked Questions

What if I did not work 35 years?

Social Security includes zeros for any years under 35 that you did not work. These zeros lower your average earnings and reduce your benefit. Each additional year of earnings you add can replace a zero, raising your average. Working additional years after age 60 can significantly increase your benefit because those years are not indexed for inflation.

Can I see my earnings record before I claim?

Yes. You can create a my Social Security account at ssa.gov to view your earnings history, see an estimate of your benefit at different claiming ages, and check for errors. You can also request a paper Statement of Earnings from the Social Security Administration if you prefer not to use the online tool.

Does my spouse's earnings affect my benefit calculation?

Your own benefit is calculated only from your own earnings record. However, you may be may have access to to a separate spousal benefit based on your spouse's earnings, or a survivor benefit if your spouse has passed away. These are calculated differently and may be reduced by the Government Pension Offset if you receive a non-covered government pension.

What happens to my benefit if I claim at 62 instead of 67?

Your monthly benefit is reduced by roughly 30% if you claim at 62 instead of 67. This reduction is permanent and applies to every payment you receive for the rest of your life. However, you receive payments for five additional years, so the total amount you receive by age 80 may be similar to waiting until 67.

How often does Social Security recalculate my benefit after I start claiming?

Social Security recalculates your benefit each year if you continue working and have earnings that are higher than one of your 35 highest-earning years. The new earnings replace a lower year, raising your average and increasing your benefit. This recalculation happens automatically; you do not need to request it.