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

Social Security calculates your monthly benefit by looking at your work history — specifically, your 35 highest-earning years. The Social Security Administration (SSA) adjusts those earnings for inflation so that money from 1985 counts fairly against money from 2023. If you worked fewer than 35 years, they count the missing years as zero, which lowers your total. The SSA then takes your average monthly earnings from those 35 years and applies a formula that gives you a larger percentage of your first dollars earned and a smaller percentage of higher earnings.

This formula is called the Primary Insurance Amount, or PIA. It is the foundation of what you receive. The exact dollar amounts in the formula change each year based on national wage growth. Your actual monthly check depends on when you start taking benefits — claim at 62 and you get less per month for life; wait until 70 and you get more per month for life.

Key Takeaways

  • The SSA uses your 35 highest-earning years to calculate your benefit, adjusted for inflation, so early career earnings count fairly against recent ones.
  • If you worked fewer than 35 years, the missing years count as zero earnings, which permanently reduces your benefit amount.
  • Your benefit increases by roughly 8 percent for each year you delay claiming between age 62 and 70, so timing affects your lifetime total.
  • You can view your actual earnings record and estimated benefit amounts on your my Social Security account at ssa.gov.
  • Spousal and survivor benefits are calculated separately using your Primary Insurance Amount as a starting point.

Why your work history matters more than your current income

Social Security is not means-tested, meaning your current bank account or income does not reduce your benefit. What matters is what you earned and paid taxes on during your working years. The SSA pulls your earnings record from the W-2 forms your employers filed or the self-employment tax returns you submitted. If you were paid under the table or your employer did not report your wages, those years do not count toward your benefit.

This is why checking your earnings record is important. You can request a copy from the SSA or view it through your my Social Security account. If you spot an error — a missing year, a year with too-low earnings, or a duplicate entry — you can ask the SSA to correct it. You typically have three years, three months, and 15 days from the end of the year in which you earned the money to report an error, though some corrections can be made later if you have proof.

How the benefit formula actually works

Once the SSA has your 35 highest years and calculated your average monthly earnings (called your Average Indexed Monthly Earnings, or AIME), it plugs that number into a three-part formula. The formula gives you 90 percent of your first $1,174 in AIME, then 32 percent of earnings between $1,174 and $7,078, then 15 percent of anything above $7,078. These dollar amounts, called bend points, change each year.

The result is your Primary Insurance Amount. For someone with very low lifetime earnings, the formula replaces a larger share of their income. For someone with high lifetime earnings, it replaces a smaller share. This is intentional — Social Security is designed to replace a higher percentage of income for lower earners and a lower percentage for higher earners. A worker who earned the average wage might see Social Security replace about 40 percent of their pre-retirement income; a high earner might see 25 to 30 percent.

What happens if you have gaps in your work history

If you worked only 30 years, the SSA counts five years of zero earnings in your 35-year average. Those zeros significantly reduce your benefit. Each missing year is like averaging in a year where you earned nothing. For someone who took time out for caregiving, education, or unemployment, this can mean a 10 to 15 percent reduction in their benefit compared to someone with 35 full years of work.

There is no way to remove those zero years once you claim, but you can still work and earn wages that replace them. If you are still working and earning, those new earnings can replace your lowest-earning years in the calculation. The SSA recalculates your benefit each year you continue to work, so your benefit can grow even after you start receiving it — though this only happens if your new earnings are high enough to replace one of your lowest 35 years.

How claiming age changes your monthly amount

Your Primary Insurance Amount is your benefit at your full retirement age, which depends on your birth year. For people born in 1960 or later, full retirement age is 67. You can claim as early as 62, but your benefit is reduced by roughly 30 percent. You can delay until 70, and your benefit increases by roughly 8 percent per year you wait past full retirement age — a total increase of about 24 percent by age 70.

This is not a choice between a smaller total and a larger total over your lifetime — the math is more complex. If you claim at 62 and live to 80, you will have received more total dollars than if you waited until 70. If you live past 80, waiting until 70 usually pays more in total. Your health, family longevity, and financial need all factor into the decision. The SSA's my Social Security tool shows you your estimated benefit at different claiming ages so you can see the monthly difference.

How spousal and survivor benefits connect to your amount

If you are married, your spouse may be able to receive a benefit based on your earnings record. A spouse's benefit is typically up to 50 percent of your Primary Insurance Amount, though it is reduced if they claim before their own full retirement age. If you die, your spouse and children may receive survivor benefits based on your record. The total amount paid to your family cannot exceed about 175 to 180 percent of your Primary Insurance Amount, so the SSA divides that pool among all may be able to access family members.

This is why your Primary Insurance Amount matters to people other than you. A higher benefit for you means a higher potential benefit for your spouse or children. Conversely, if you claim early and your benefit is reduced, any family benefits based on your record are also reduced.

Where to find your actual numbers

The SSA sends a Social Security Statement to workers age 60 and older who are not yet receiving benefits. The statement shows your earnings history and your estimated benefit at different claiming ages. You can also create a my Social Security account at ssa.gov to view your earnings record, check for errors, and see your estimates anytime. You do not need to wait for a mailed statement.

Your estimate assumes you will keep working at your current pace until you claim. If you plan to retire earlier or work longer, your actual benefit will differ. The SSA's online calculator lets you adjust your assumptions and see how different work and claiming scenarios affect your benefit. If you have questions about your specific record, you can call the SSA at 1-800-772-1213 or visit a local Social Security office.

Frequently Asked Questions

Can I increase my Social Security benefit after I start receiving it?

Yes, if you continue to work and earn wages higher than one of your lowest 35 years, the SSA recalculates your benefit each year and increases it. You can also request to suspend your benefits at full retirement age and let them grow until 70, though this is less common now. If you claimed early and later regret it, you can withdraw your process within 12 months and reapply later at a higher rate, but you must repay all benefits received.

What if I worked in another country or for the federal government?

Work in most other countries counts toward Social Security if you paid Social Security taxes on it. Federal employees hired before 1984 are covered by a different system (CSRS) and may not receive Social Security, though some federal workers are covered by both systems. If you have a mix of covered and non-covered work, the SSA has rules about how to calculate your benefit fairly.

Does my spouse's income affect my Social Security benefit?

No. Your benefit is based only on your own earnings record. Your spouse's income, savings, or benefits do not change what you receive. However, if your spouse also receives Social Security, their benefit is based on their own record, and there are rules about how much a family can receive in total.

What happens to my benefit if I take time off work to raise children?

Years with no earnings count as zero in your 35-year average, which lowers your benefit. Social Security does not have a child-rearing credit that removes those years. However, if you return to work and earn enough to replace your lowest-earning years, your benefit can grow. The longer you work after returning, the more those zero years can be replaced.

Can I see how my benefit would change if I worked a few more years?

Yes. The my Social Security account shows your estimated benefit based on your current record. You can also contact the SSA directly and ask them to show you a projection that assumes you will work for a specific number of additional years at your current or expected earnings level.