AIME vs. PIA: What Every Social Security Beneficiary Needs to Know
Understand the crucial difference between Average Indexed Monthly Earnings (AIME) and your Primary Insurance Amount (PIA), and how progressive bend points link them.
Published · Updated
The difference between AIME and PIA
AIME and PIA are the two core milestones in Social Security benefit math. While they sound similar, they represent entirely different figures in your retirement calculation:
- AIME (Average Indexed Monthly Earnings): Your career wage average, computed from your highest 35 years of wage-indexed earnings divided by 420 months.
- PIA (Primary Insurance Amount): The monthly dollar benefit you are entitled to receive if you claim at your statutory Full Retirement Age.
How bend points turn AIME into PIA
Social Security does not simply pay a flat percentage of your earnings. Instead, the formula uses progressive "bend points" that replace a higher percentage of income for lower-wage earners. For a worker reaching age 62 in 2026, the bend points are $1,286 and $7,749:
- 90% of the first $1,286 of AIME
- 32% of AIME between $1,286 and $7,749
- 15% of AIME exceeding $7,749
Statutory rounding to the dime
When the three formula tiers are added together, the resulting raw PIA is rounded down to the nearest multiple of $0.10. For example, a calculated PIA of $2,450.68 becomes $2,450.60. Subsequent claiming reductions or delayed credits are applied to this rounded figure.
Official evidence Social Security Administration · as of 2026-09-02Calculate your exact AIME and PIA
Review your complete bend-point breakdown with our Social Security Benefits Calculator.
How benefits are calculatedThe 35-year ruleClaiming age decision guide
General information only. Confirm personal benefit details with SSA or your my Social Security account.