Your benefit is based on your highest 35 years of earnings, adjusted for inflation

Social Security calculates your monthly benefit by taking your 35 highest-earning years, adjusting each year's earnings for inflation, and then averaging them across 420 months. The result is your Primary Insurance Amount (PIA) — the full benefit you receive at your full retirement age. If you were born in 1943 or later, your full retirement age ranges from 66 to 67, depending on your birth year. If you claim before that age, your benefit is reduced. If you claim after, it increases.

The Social Security Administration (SSA) does not use your actual dollar amounts from decades ago. Instead, it adjusts older earnings upward using a national wage index so that a dollar earned in 1990 is worth roughly what it would be today. This means your early career earnings count toward your benefit even though they were smaller in nominal terms.

You can see your own earnings record and estimated benefit on your Social Security account at ssa.gov. The SSA mails a statement to people not yet receiving benefits, or you can create an account online to view it anytime. This record is the actual starting point for your calculation — not an estimate, but the wages SSA has on file for you.

Key Takeaways

  • Your benefit uses your 35 highest-earning years; if you worked fewer than 35 years, zeros are included in the calculation, which lowers your benefit.
  • Earnings are adjusted for inflation using a national wage index so that older earnings count fairly against recent ones.
  • Your Primary Insurance Amount is the benefit you receive at full retirement age; claiming earlier reduces it, claiming later increases it.
  • You can view your actual earnings record and estimated benefit amount on your Social Security account at ssa.gov.
  • If your earnings record contains errors, you must report them to SSA within three years, three months, and 15 days of the year the wages were earned.

The 35-year earnings window and how missing years affect your benefit

Social Security looks back at your entire work history and selects your 35 highest-earning years. If you worked for 40 years, the five lowest-earning years are dropped. If you worked for only 20 years, SSA includes 15 years of zero earnings in the calculation, which significantly reduces your benefit.

This is why work history matters. A person who took time out of the workforce for caregiving, unemployment, or other reasons will have zeros counted in their 35-year window. Those zeros pull down the average, even if the years they did work were high-earning. There is no way to remove zeros from the calculation — they are part of the formula by design.

If you are still working and have not yet reached full retirement age, you can see how future earnings might change your benefit. The SSA's online account shows an estimate based on your current record, and you can adjust the estimate to see what happens if you earn a certain amount in future years. This is useful if you are deciding whether to work longer.

How inflation adjustment works in the calculation

Each of your 35 highest-earning years is multiplied by a wage index factor specific to that year. The wage index reflects the average wage earned by all workers in the United States that year. SSA uses the index to adjust your historical earnings forward so that they are comparable to current wages.

For example, if you earned $20,000 in 1990, SSA does not use $20,000 in your calculation. Instead, it multiplies $20,000 by the wage index factor for 1990 (which is roughly 2.7 in recent calculations). This brings that $20,000 up to approximately $54,000 in today's wage terms. The adjustment happens automatically — you do not need to do anything.

The wage index is published by SSA each year in October and applies to earnings from two years prior. So the 2024 wage index, published in October 2024, is used to adjust earnings from 2022. This lag exists because SSA needs time to collect and verify wage data from employers and the IRS.

The bend points formula that determines your actual monthly amount

Once your 35 years are adjusted and averaged, SSA applies a formula with three "bend points" to calculate your actual monthly benefit. The bend points are dollar thresholds that change each year based on wage growth. For 2024, the bend points are $1,174 and $7,078 (these amounts vary by year).

Here is how the formula works: you receive 90 percent of your average monthly earnings up to the first bend point, 32 percent of earnings between the first and second bend point, and 15 percent of earnings above the second bend point. The percentages are fixed, but the dollar amounts where they explore change annually.

This structure means lower earners receive a higher percentage of their pre-retirement income, while higher earners receive a lower percentage. A person who averaged $2,000 per month gets a larger replacement rate than someone who averaged $8,000 per month. This is intentional — Social Security is designed to replace a larger share of income for lower-wage workers.

How work credits and age affect when you can receive benefits

To receive any Social Security benefit, you must have earned enough work credits. You earn one credit for each $1,705 of wages in 2024 (this amount increases yearly). You can earn up to four credits per year. Most people need 40 credits total to receive retirement benefits, which typically means working for at least 10 years.

Your age when you claim determines the percentage of your Primary Insurance Amount you receive. If you claim at 62 (the earliest age), your benefit is reduced by roughly 30 percent. If you claim at your full retirement age, you receive 100 percent. If you delay until 70, your benefit increases by roughly 24 percent per year you wait, for a total increase of about 76 percent above your full retirement age amount.

The reduction or increase is permanent — it applies to your benefit for life and also affects any benefits paid to your spouse or children based on your record. This is why the timing of your claim is a significant financial decision.

Earnings after you start receiving benefits

If you claim Social Security before your full retirement age and continue to work, SSA reduces your benefit by $1 for every $2 you earn above an annual limit. For 2024, that limit is $23,400. In the year you reach full retirement age, the reduction is $1 for every $3 earned above $62,160, but only for earnings before the month you reach full retirement age.

Once you reach full retirement age, there is no earnings limit — you can earn any amount and receive your full benefit. This rule applies only to earned income (wages or self-employment income), not to investment income, pensions, or other retirement income.

The earnings test is temporary. Any benefits withheld due to earnings are not lost — SSA recalculates your benefit at full retirement age to account for the months benefits were withheld, which increases your monthly amount going forward.

Correcting errors in your earnings record

Your Social Security benefit is only as accurate as the earnings record SSA has on file. If your employer reported your wages incorrectly, or if wages were not reported at all, your benefit will be lower than it should be.

You can review your earnings record on your Social Security account at ssa.gov. Look for missing years, years with unusually low earnings, or years where you know you earned more than what is shown. If you find an error, contact SSA with documentation — typically a W-2, tax return, or pay stub from that year.

There is a time limit: you must report an error within three years, three months, and 15 days of the year the wages were earned. For example, wages earned in 2020 must be reported by April 15, 2024. After that important date, SSA generally cannot correct the record, even if the error is documented. This is why checking your record periodically, starting in your 50s, is important.

How family benefits are calculated based on your record

If you are receiving Social Security, your spouse, ex-spouse, children, and parents may also receive benefits based on your earnings record. These benefits are calculated as a percentage of your Primary Insurance Amount, not as a separate calculation of their own earnings.

A spouse at full retirement age receives up to 50 percent of your PIA. A spouse claiming before full retirement age receives less. Children under 19 (or up to 22 if in high school) receive up to 50 percent of your PIA each. There is a family maximum — the total amount paid to all family members based on your record cannot exceed 150 to 180 percent of your PIA, depending on your situation.

If you claim early, your PIA is reduced, which also reduces the amount available to your family members. This is another reason why your claiming age affects more than just your own benefit.

Frequently Asked Questions

What if I did not work for 35 years?

SSA includes zeros for any year you did not work, up to 35 years total. If you worked 30 years, five zeros are included in your calculation, which lowers your average and your benefit. There is no way to remove the zeros, but working additional years can replace lower-earning years and increase your benefit.

Does Social Security count self-employment income?

Yes. Self-employment income is counted the same way as wages, but you must pay both the employee and employer portion of Social Security tax (15.3 percent total). You report self-employment income on Schedule C of your tax return, and SSA receives the information from the IRS.

Can I see how much my benefit will be if I claim at different ages?

Yes. Your Social Security account at ssa.gov shows your estimated benefit at different claiming ages — typically at 62, full retirement age, and 70. These are estimates based on your current earnings record and assume you do not earn additional income before you claim.

What happens to my benefit if I move to another country?

If you are a U.S. citizen, you can receive Social Security anywhere in the world. If you are not a U.S. citizen, restrictions explore depending on your country of residence. Contact SSA before moving to confirm your situation.

If I was married multiple times, can I use more than one ex-spouse's record?

No. If you are divorced, you can receive a benefit based on your own record or on one ex-spouse's record — whichever is higher. You choose one. You cannot combine benefits from multiple ex-spouses' records.