The Basic Formula: Your 35 Highest-Earning Years

Social Security takes your earnings record from the 35 years you earned the most money, adjusts those earnings for inflation, and calculates an average. That average becomes the foundation for your monthly benefit. If you worked fewer than 35 years, Social Security counts the missing years as zeros, which lowers your average and your benefit.

The agency does not use your actual dollar amounts from decades ago. Instead, it adjusts older earnings upward using a wage index so that $10,000 earned in 1990 is treated as equivalent to $10,000 earned in 2024 in terms of purchasing power. This adjustment happens automatically — you do not need to do anything.

Once Social Security has your average indexed monthly earnings, it applies a formula called the Primary Insurance Amount (PIA). This formula has three "bend points" — dollar thresholds where the percentage of your earnings counted changes. The formula is designed so that workers with lower lifetime earnings replace a higher percentage of their pre-retirement income, while higher earners replace a smaller percentage.

Key Takeaways

  • Social Security uses your 35 highest-earning years; if you worked fewer years, the missing years count as zero and reduce your benefit.
  • Your earnings are adjusted for inflation using a wage index before they are averaged, so older earnings are not penalized straightforward for being old.
  • The Primary Insurance Amount formula applies different percentages to different portions of your average earnings, giving lower-income workers a higher replacement rate.
  • Your birth year determines your Full Retirement Age, which is the age at which you receive 100 percent of your calculated benefit.
  • Claiming before Full Retirement Age reduces your monthly benefit permanently; claiming after increases it until age 70.

How the Bend Points Work

The bend point formula takes your average indexed monthly earnings and divides it into three segments. Social Security replaces 90 percent of the first segment, 32 percent of the second segment, and 15 percent of the third segment. The dollar amounts of these segments change each year based on wage growth.

For someone born in 1960 with a benefit calculated in 2024, the first bend point might be around $1,174 and the second around $7,078 (these numbers vary by year and are published by Social Security each October). If your average indexed monthly earnings were $3,000, Social Security would calculate: (90% × $1,174) + (32% × $5,904) + (15% × $0) = $1,056.60 + $1,889.28 = $2,945.88 per month.

A worker with lower lifetime earnings might have an average of $1,500, which would yield: (90% × $1,174) + (32% × $326) = $1,056.60 + $104.32 = $1,160.92 per month. The lower-income worker's benefit replaces about 77 percent of their pre-retirement earnings, while the higher-income worker's benefit replaces about 98 percent. This is intentional — the system is designed to provide a basic income floor.

Full Retirement Age and How It Affects Your Benefit

The amount calculated using the bend point formula is your benefit at Full Retirement Age (FRA) — the age at which you receive 100 percent of what Social Security calculated. Your Full Retirement Age depends on your birth year. For people born between 1943 and 1954, it is 66. For those born between 1955 and 1960, it increases by two months for each birth year, reaching 67 for those born in 1960 or later.

Full Retirement Age is not the same as retirement age. You can claim Social Security as early as 62, but doing so permanently reduces your monthly benefit. If you claim at 62 and your Full Retirement Age is 67, your benefit is reduced by about 30 percent. If you wait until 70, your benefit increases by about 24 percent per year of delay, reaching roughly 124 percent of your Full Retirement Age amount.

The reduction or increase is permanent. If you claim at 62 and receive $1,500 per month, you will receive $1,500 per month (adjusted for cost-of-living increases) for the rest of your life. If you had waited until 67, you would have received about $2,150 per month for life. This is why the decision of when to claim is significant — it affects not just your benefit but also your spouse's and survivor benefits.

Earnings Records and How to Check Yours

Social Security's calculation depends entirely on the earnings record it has on file for you. If your employer did not report your wages correctly, or if you worked under a name different from the one on your Social Security card, your record may be incomplete or inaccurate. You can view your earnings record online through your my Social Security account at ssa.gov.

You should check your record every few years, especially if you have changed jobs, been self-employed, or worked under different names. If you spot an error — a year with no earnings when you know you worked, or earnings that seem too low — you can contact Social Security with documentation like W-2s or tax returns to request a correction. Corrections are usually made within a few months, but the sooner you report an error, the sooner it can be fixed.

If you do not have a my Social Security account, you can create one at ssa.gov using your email, Social Security number, and identity verification. Once you are logged in, you can see your estimated benefit at different claiming ages, your earnings history, and your work credits toward benefits.

Government Pension Offsets and Windfall Elimination

Two rules can reduce your Social Security benefit if you also receive a pension from work not covered by Social Security — typically government employment like teaching, police work, or civil service in certain states.

The Windfall Elimination Provision (WEP) changes the bend point formula for people with non-covered pensions. Instead of replacing 90 percent of the first segment of earnings, it may replace as little as 40 percent. This can reduce your benefit by up to half of your non-covered pension amount. The reduction is capped, but it can be substantial.

The Government Pension Offset (GPO) affects spousal and survivor benefits. If you receive a government pension and also claim a benefit as a spouse or widow, your spousal or survivor benefit is reduced by two-thirds of your pension amount. In many cases, this eliminates the spousal or survivor benefit entirely. These rules explore only if your government pension is from work not covered by Social Security.

Cost-of-Living Adjustments and How They Work

Once you begin receiving benefits, your monthly amount is adjusted each year for inflation using the Cost-of-Living Adjustment (COLA). Social Security calculates COLA by comparing the Consumer Price Index from the third quarter of one year to the third quarter of the previous year. If prices have risen, your benefit rises by the same percentage.

COLA is announced in October and takes effect in January. In years when inflation is flat or negative, there is no increase — your benefit stays the same. This happened in 2010, 2011, and 2016. In other years, COLA has ranged from less than 1 percent to over 8 percent, depending on inflation.

COLA applies to all benefits paid on your record — your own retirement benefit, any spousal benefits, and any survivor benefits paid to your family. It is automatic; you do not need to do anything to receive it.

Frequently Asked Questions

Does working longer increase my Social Security benefit?

Yes, if your recent earnings are higher than some of your earlier years. Social Security uses your 35 highest-earning years, so if you work an additional year and that year's earnings are higher than your lowest year in the 35-year average, your benefit increases. However, if you are already past 35 years of work and your new earnings are lower than your current lowest year, your benefit will not change.

What if I did not work for 35 years?

Social Security counts any years you did not work as zeros. If you worked 30 years, five years count as zero, which lowers your average and your benefit. You can still receive a benefit, but it will be smaller than someone with 35 years of earnings. Working additional years can replace those zeros if your new earnings are higher than zero.

Can I see my estimated benefit before I claim?

Yes. Log into your my Social Security account at ssa.gov and view your earnings record and benefit estimates. The estimates show what you would receive if you claimed at 62, at Full Retirement Age, and at 70. These are projections based on your current earnings record and assume you continue working at your current pace until you claim.

Does my spouse's benefit affect my benefit amount?

No. Your own retirement benefit is calculated based only on your earnings record. Your spouse may be may have access to to a separate spousal benefit based on your record, but that does not change the amount you receive. Spousal benefits are calculated separately using different rules.

What happens to my benefit if I claim early and then change my mind?

If you claim before Full Retirement Age, you can withdraw your claim within 12 months and repay all benefits received. This restarts your benefit at a higher amount. After 12 months, you cannot withdraw your claim, but you can suspend your benefit at Full Retirement Age and let it grow until 70, though this is less common now due to rule changes.