Your benefit is based on your 35 highest-earning years, not your total lifetime earnings

Social Security looks back at your work history and picks out your 35 highest-earning years. It then adjusts those earnings for inflation, adds them up, and divides by 420 months (35 years × 12 months). That average is the foundation of your benefit amount. If you worked fewer than 35 years, Social Security counts the missing years as zeros, which lowers your average.

The calculation does not reward you for earning more in recent years or penalize you for lower earnings early in your career — it treats all 35 years the same way after adjusting for inflation. This means a year you earned $30,000 in 1990 and a year you earned $60,000 in 2020 are both counted, but the 1990 figure is adjusted upward to reflect what that money would be worth in today's dollars.

If you have not yet reached age 62, Social Security does not know your final 35 years yet. The agency uses your most recent earnings record to estimate what your benefit might be, but that estimate changes every year you continue to work.

Key Takeaways

  • Social Security uses your 35 highest-earning years after adjusting each year's earnings for inflation, then divides the total by 420 months to find your average.
  • Years you did not work count as zeros, so working fewer than 35 years reduces your benefit amount.
  • The agency applies a bend formula to your average earnings, which means lower earners get a higher percentage of their average as a benefit.
  • Claiming before your full retirement age permanently reduces your monthly payment, while delaying past full retirement age increases it.
  • You can view your actual earnings record and benefit estimate on your Social Security account at ssa.gov.

The bend formula: why lower earners receive a higher percentage

Once Social Security calculates your average monthly earnings, it does not straightforward pay you a percentage of that amount. Instead, it uses a bend formula that replaces a higher percentage of earnings for people who earned less.

The bend formula has two bend points — dollar thresholds that change each year. For 2024, the first bend point is $1,174 and the second is $7,078. If your average monthly earnings fall below the first bend point, Social Security replaces 90 percent of that amount. Earnings between the first and second bend points are replaced at 32 percent. Earnings above the second bend point are replaced at 15 percent.

This structure means a person who averaged $2,000 per month receives a higher percentage of their earnings as a benefit than someone who averaged $8,000 per month. The bend points adjust annually based on national wage growth, so the thresholds are different each year.

How working longer can increase your benefit

If you have fewer than 35 years of work history, each additional year you work replaces a zero in the calculation, which raises your average earnings and increases your benefit. Even if your recent earnings are lower than your peak years, adding a year of work is usually better than leaving a zero in place.

If you already have 35 or more years of work history, additional years only help if your new earnings are higher than one of your current 35 highest years. Social Security automatically drops your lowest-earning year from the calculation and includes the new year instead. This means working longer helps only if you are still earning more than you did in your lowest-earning year of the past 35.

You can see which years Social Security is counting by viewing your earnings record online. This shows you exactly which years are in your top 35 and which years are being excluded.

Claiming age and how it affects your monthly payment

The amount calculated above is your Primary Insurance Amount (PIA) — the benefit you receive if you claim at your full retirement age. Full retirement age ranges from 66 to 67 depending on your birth year.

If you claim before full retirement age, your monthly payment is permanently reduced. Claiming at 62 (the earliest age) results in roughly a 30 percent reduction, though the exact percentage depends on your birth year. If you delay claiming past full retirement age, your benefit increases by about 8 percent per year until age 70.

This means two people with identical work histories can receive very different monthly amounts depending on when they claim. The total amount you receive over your lifetime may be similar regardless of claiming age, but your monthly payment and the timing of when you receive it differ significantly.

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 — typically government employment.

The Windfall Elimination Provision (WEP) changes how your bend formula is calculated if you have a non-covered pension. Instead of replacing 90 percent of your lowest earnings, it may replace as little as 40 percent, depending on your years of coverage. The Government Pension Offset (GPO) reduces spousal or survivor benefits by two-thirds of your non-covered government pension amount.

These rules explore only if you worked in a job where you did not pay Social Security taxes — such as some state or local government positions, railroad work, or foreign government employment. If you worked in covered employment for at least 30 years, WEP has a much smaller effect.

Why your estimate may change year to year

Social Security sends you an estimate of your future benefit, but that number is not final until you actually claim. Your estimate changes if you continue working, because the agency recalculates using your updated earnings record.

Your estimate also changes if bend points or other factors used in the calculation shift. Bend points adjust annually based on national wage growth, so the formula itself changes each year. Additionally, if you have not yet reached full retirement age, your estimate assumes you will continue working at a similar level until you claim.

You can request an updated estimate at any time by creating or logging into your account at ssa.gov. The agency also mails benefit estimates to people age 60 and older who are not yet receiving benefits.

How to find your actual earnings record and verify the calculation

Your Social Security earnings record is the starting point for everything in this calculation. You can view it free by creating an account at ssa.gov and selecting "Earnings Record" under the "Benefits" section. The record shows what Social Security has on file for each year you worked.

Check this record for errors — missing years, years with unusually low reported earnings, or years you know you worked but do not appear. If you find an error, you can report it to Social Security with documentation such as tax returns, W-2 forms, or pay stubs. Corrections can take several months, so it is worth checking well before you plan to claim.

Your benefit estimate appears in the same account under "Benefit Estimates." This shows the amount you would receive if you claimed at 62, at full retirement age, and at 70. These estimates are based on your current earnings record and assume you stop working when you claim.

Frequently Asked Questions

Does Social Security count self-employment income the same way as W-2 wages?

Yes. Self-employment income is reported on your tax return and sent to Social Security the same way W-2 wages are. You must pay both the employee and employer portions of Social Security tax on self-employment income, but the amount credited to your record is the same as if you were a W-2 employee earning that amount.

What happens if I have a year with very high earnings — does it help my benefit even if I only worked part of that year?

Yes. Social Security counts the full year's earnings regardless of when during the year you worked. A year you earned $80,000 in six months counts the same as a year you earned $80,000 over twelve months. This can help if you had a high-earning year even if it was brief.

Can I see which of my 35 years Social Security is actually using in the calculation?

Your earnings record on ssa.gov shows all your years of work, but it does not explicitly label which 35 are being used. However, you can identify them by looking at your highest 35 years of earnings. Social Security automatically uses the 35 highest, so you can count down from your highest-earning year to find where the cutoff falls.

If I worked in another country, does that time count toward Social Security?

Only if you paid Social Security taxes on those earnings. Most countries do not participate in the U.S. Social Security system. However, the U.S. has totalization agreements with some countries that allow work in both countries to count toward benefits. You would need to contact Social Security directly to determine whether your foreign work is covered.

Does my spouse's earnings affect how my benefit is calculated?

No. Your benefit is calculated solely on your own work history and earnings record. Your spouse's earnings do not change your calculation. However, your spouse may be able to receive a separate benefit based on their own record, or a spousal benefit based on your record, depending on their age and work history.