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 together. That average becomes the foundation of your benefit amount. If you worked fewer than 35 years, the formula includes zeros for the missing years, which lowers your average.

The Social Security Administration (SSA) adjusts your past earnings for inflation using a wage index, so a dollar you earned in 1985 is not compared directly to a dollar you earned in 2020. This adjustment happens automatically — you do not do it yourself. The result is called your Average Indexed Monthly Earnings (AIME), and it is the number the SSA uses to calculate what you will receive.

Key Takeaways

  • Social Security uses your 35 highest-earning years; years with no earnings count as zeros and reduce your average.
  • Your earnings are adjusted for inflation using a wage index so older years are comparable to recent years.
  • The SSA applies a formula called the Primary Insurance Amount (PIA) that gives you a larger percentage of your first dollars earned and a smaller percentage of higher earnings.
  • You can see your actual earnings record and estimated benefit on your Social Security account at ssa.gov.
  • Your benefit changes if you claim before age 67 (reduced) or after age 67 (increased), and the reduction or increase is permanent.

From Average Earnings to Your Benefit: The PIA Formula

Once the SSA has your AIME, it applies a formula called the Primary Insurance Amount (PIA). This formula is not a straightforward percentage — it is a stepped calculation that replaces a larger share of your lower earnings and a smaller share of your higher earnings. This structure means that someone who earned less during their career gets a higher replacement rate than someone who earned much more.

The exact dollar amounts in the PIA formula change each year based on wage growth. For 2024, the formula bends at two points, but the SSA publishes the current bend points every October for the following year. You do not need to memorize these numbers — the SSA calculates your PIA automatically using your earnings record.

The result of the PIA formula is your Primary Insurance Amount, which is the benefit you would receive if you claimed at your full retirement age. This is the number the SSA uses as the starting point for any adjustments based on when you actually claim.

How Claiming Age Changes Your Benefit

Your full retirement age depends on your birth year. For people born between 1943 and 1954, it is 66. For people born between 1955 and 1959, it increases by two months for each year of birth. For people born in 1960 or later, it is 67. You can claim as early as age 62, but your benefit will be permanently reduced. You can also wait until age 70, and your benefit will be permanently increased.

The reduction for claiming before full retirement age is roughly 6.7 percent per year. If your full retirement age is 67 and you claim at 62, you lose five years of increases, which reduces your benefit by about one-third. The increase for delaying past full retirement age is roughly 8 percent per year. If you wait from age 67 to age 70, you gain three years of increases, which raises your benefit by about 24 percent.

These adjustments are permanent. Once you claim, your benefit amount is locked in. The only exception is if you withdraw your claim within 12 months of starting benefits — a rare option that requires repaying all benefits received so far.

Earnings Records and Wage Reporting

Your Social Security benefit is based on what your employer reported to the SSA through your Social Security number. If you were self-employed, your earnings came from your tax return. The SSA matches these reports to your account, and errors can lower your benefit permanently if they are not caught.

You should check your earnings record every few years to make sure the SSA has the correct amounts. You can view your record online at ssa.gov by creating a my Social Security account. If you find an error — a missing year, an amount that seems too low, or earnings attributed to the wrong year — contact the SSA with your W-2 or tax return as proof. The SSA can correct records going back three years, three months, and 15 days from the date of the error.

If you worked for a government employer that did not withhold Social Security taxes, or if you have non-covered earnings, the SSA may reduce your benefit using the Government Pension Offset or Windfall Elimination Provision. These rules are complex and explore only in specific situations, but they can significantly lower your benefit if you are affected.

What Your Benefit Estimate Means

The SSA sends benefit estimates to workers age 60 and older who are not yet receiving benefits. You can also request an estimate by creating a my Social Security account online. These estimates show what you might receive at different claiming ages — typically at 62, at full retirement age, and at 70.

The estimate assumes you will continue working at your current earnings level until you claim. If your earnings change significantly, your estimate will change. The estimate also assumes current law — if Congress changes Social Security rules, future benefits could be different. The estimate is not a promise; it is a projection based on your record as it stands today.

Factors That Do Not Change Your Benefit Calculation

Your marital status, number of children, or health does not change how your own benefit is calculated. Your benefit is based solely on your earnings record and when you claim. However, if you are married, divorced, or widowed, you may be able to receive a benefit based on your spouse's or ex-spouse's earnings record, and that benefit is calculated differently.

Cost-of-living adjustments (COLAs) happen every year and raise all benefits by the same percentage, but they do not change the formula used to calculate your initial benefit. Once you start receiving benefits, your monthly amount increases with the COLA each January, but the underlying calculation stays the same.

How to Review Your Calculation

The SSA does not send you a detailed breakdown of how your benefit was calculated, but you can request a detailed earnings record and benefit calculation statement by calling 1-800-772-1213 or visiting your local Social Security office. You can also create a my Social Security account at ssa.gov to see your earnings record and get an estimate.

If you believe there is an error in your calculation, the SSA can review it. Bring your Social Security card, birth certificate, and any documents related to your earnings — W-2s, tax returns, or pay stubs. If the SSA made an error, it can correct your benefit retroactively, but only if you report it within a certain time frame.

Frequently Asked Questions

What happens to my benefit if I did not work for 35 years?

The SSA includes zeros for any years you did not work, which lowers your average earnings. If you worked 30 years, five zeros are included in the calculation. Working additional years can replace those zeros if your new earnings are higher than your lowest-earning years already counted.

Can I see the exact bend points used to calculate my benefit?

Yes. The SSA publishes bend points every October for the following year on its website. You can also call 1-800-772-1213 and ask for the current bend points, or request a detailed benefit calculation statement that shows the formula applied to your earnings.

If I claim early and my benefit is reduced, does it stay reduced forever?

Yes. The reduction for claiming before full retirement age is permanent. If you claim at 62 instead of 67, your monthly benefit will be roughly one-third lower for the rest of your life, even after you reach full retirement age.

Does working after I start receiving benefits change my calculation?

No. Once you claim and your benefit is calculated, future earnings do not change your benefit amount. However, if you are under full retirement age and earn above a certain limit, the SSA will withhold part of your benefit temporarily. After you reach full retirement age, there is no earnings limit.

How do I know if my earnings record has an error?

Create a my Social Security account at ssa.gov and review your earnings record. Look for missing years, amounts that seem too low, or earnings you do not recognize. If you find an error, contact the SSA with your W-2 or tax return as proof. Errors can be corrected going back three years, three months, and 15 days.