How Social Security Benefits Are Calculated
Your Social Security benefit starts from your 35 highest-earning years, then goes through AIME and PIA. Here is the calculation in plain English.
Your Social Security benefit starts from your 35 highest-earning years, then goes through AIME and PIA. Here is the calculation in plain English.
Your benefit is built in three steps:
- AIME — Your 35 highest-earning years (adjusted for wage growth) are averaged into an Average Indexed Monthly Earnings. Years with no earnings count as zero.
- PIA — The Primary Insurance Amount is computed from AIME using a progressive formula (bend points replace a higher share of low earnings than high earnings).
- Adjustments — Your PIA is reduced for claiming before FRA or increased with delayed credits past FRA (see the claiming age chart).
If you have fewer than 35 years of earnings, zeros drag the average down — that is why working a few extra years can raise your benefit. Your exact PIA appears in your my Social Security statement at ssa.gov; plug that number into the break-even calculator for your claiming decision.
Frequently Asked Questions
How many years of work count toward Social Security?
Your 35 highest-earning years are averaged. Fewer than 35 years means zeros fill the gaps, lowering your benefit.
What is a bend point?
Bend points are the AIME thresholds where the replacement rate drops (90%, then 32%, then 15%) — they make the formula progressive.
Where do I find my exact benefit?
Your my Social Security account at ssa.gov shows your estimated benefit at 62, FRA, and 70 — use those numbers in our calculators.