The formula
How it works
Estimate your monthly Social Security benefit from your average career earnings. The calculator converts earnings into the indexed monthly average and applies the benefit formula to give your primary insurance amount.
FAQ
What is the AIME and PIA?
The AIME is your average indexed monthly earnings — roughly your career earnings averaged into a monthly figure. The PIA, or primary insurance amount, is the benefit that AIME produces at full retirement age, using a progressive formula that replaces more of a lower earner’s income than a higher earner’s.
How accurate is this estimate?
It is a simplified projection. Real benefits depend on your highest 35 years of inflation-indexed earnings, your exact retirement age and future cost-of-living adjustments. This uses your average earnings and the current bend points, so treat it as a ballpark for planning rather than an official figure from the SSA.
What is full retirement age?
Full retirement age is when you qualify for 100% of your PIA, currently 66 to 67 depending on your birth year. Claiming before it permanently reduces your monthly benefit, while delaying past it increases the benefit up to age 70.
Why are only 35 years of earnings used?
The formula averages your highest 35 years of inflation-indexed earnings; if you worked fewer than 35 years, the missing years count as zero and pull the average down. Working additional high-earning years can raise your AIME by replacing lower or zero-earning years.
What is the taxable maximum or wage base?
It is the cap on earnings subject to Social Security tax each year — $168,600 in 2024. Earnings above that amount are not taxed for Social Security and do not increase your benefit.
How do the bend points make the formula progressive?
Earnings below the first bend point are credited at 90%, the middle band at 32%, and everything above the second bend point at just 15%. This means lower earners get back a much larger share of their income than higher earners.
Can a spouse or survivor claim benefits based on my record?
Yes, spouses and eligible survivors can often claim a benefit based on your earnings record instead of their own, typically up to 50% of your PIA for a spouse. This calculator only estimates your own worker benefit, not spousal or survivor amounts.
About the Social Security calculator
This calculator estimates the monthly Social Security retirement benefit you might receive at full retirement age. Benefits are based on your average lifetime earnings, run through a progressive formula that deliberately replaces a larger share of income for lower earners. The calculator turns your average annual earnings into a monthly benefit using the current formula and its bend points.
How to use it
Enter your average annual earnings over your working career — a rough average of what you have earned, capped each year at the taxable maximum. The calculator converts it to average indexed monthly earnings and applies the benefit formula. For example, average earnings of $60,000 produce an AIME of $5,000 and an estimated benefit of about $2,280 a month at full retirement age.
The formula
The benefit, or PIA, is , where , and are the portions of your average indexed monthly earnings below the first bend point, between the two bend points, and above the second. The 90%, 32% and 15% factors make the formula progressive, replacing much more of a modest income than a high one.
Where it is used
People approaching retirement use it to gauge how much of their income Social Security will cover and how big a gap their savings need to fill. It illustrates why the system favours lower earners and why delaying or claiming early changes the payout. For a precise figure, the Social Security Administration’s own statement is authoritative, but this gives a quick planning estimate.