How Social Security Retirement Benefits Are Calculated

Published September 3, 2026 · Updated September 4, 2026

The statutory 5-step calculation process

Your Social Security retired-worker benefit is derived through a strict statutory formula established by the Social Security Act. It is not based on your final salary or account balance, but on your highest 35 years of wage-indexed earnings.

Step 1: Capping covered earnings at the annual maximum

Only wages subject to Social Security payroll tax (FICA) are counted. In each calendar year, earnings are capped at the Contribution and Benefit Base—such as $176,100 in 2025 and $184,500 in 2026. Earnings above this annual cap do not pay Social Security tax and are not credited toward your benefit.

Step 2: National wage indexing through age 60

To ensure historical earnings reflect modern standard of living, SSA multiplies each year's covered earnings prior to age 60 by an indexing factor. This factor equals the National Average Wage Index (AWI) for the year you turn age 60 divided by the AWI of the earnings year. Earnings at age 60 and later are taken at actual face value without indexing.

Step 3: Selecting the top 35 years and calculating AIME

SSA selects your highest 35 years of indexed earnings. The sum of these 35 years is divided by 420 months (35 years × 12 months) and rounded down to the next lower dollar. This produces your Average Indexed Monthly Earnings (AIME).

Step 4: Applying the progressive 3-tier bend point formula

Your Primary Insurance Amount (PIA)—the benefit payable at Full Retirement Age—is calculated using two statutory bend points set for your eligibility year (the year you turn 62). For example, for 2026 eligibility, the formula is:

• 90% of the first $1,286 of AIME, plus
• 32% of AIME between $1,286 and $7,749, plus
• 15% of AIME above $7,749.

The sum is rounded down to the nearest ten cents ($0.10) to establish your raw PIA.

Step 5: Applying COLAs and claiming age adjustments

Starting in the year you turn 62, Cost-of-Living Adjustments (COLAs) compound onto your PIA annually. When you claim, your actual monthly check is adjusted based on your claiming age relative to Full Retirement Age, and rounded down to the whole dollar.

Estimate your benefit with your real earnings history

Calculate your top 35 years and compare early vs. delayed retirement scenarios using our Social Security Benefits Calculator.

The 35-year rule explained·AIME vs. PIA·When to claim Social Security