Retirementradar Updated Aug 29, 2026

Answer from Retirementradar

Your monthly Social Security retirement benefit is calculated using your highest 35 years of inflation-adjusted earnings, a specific formula, and your age when you begin receiving benefits.

The Social Security Administration (SSA) determines your retirement benefit by first calculating your average indexed monthly earnings (AIME) over your highest 35 years of earnings. These earnings are adjusted for inflation to reflect their value in today's dollars. Then, a formula is applied to your AIME to arrive at your primary insurance amount (PIA), which is the benefit you would receive at your full retirement age. Finally, your benefit amount is adjusted based on whether you start receiving benefits before, at, or after your full retirement age.

This information provides a general overview of how Social Security retirement benefits are calculated and does not constitute financial advice.

What are the specific steps in the Social Security benefit calculation formula?

Retirementradar

The Social Security benefit calculation involves several key steps. First, your annual earnings are 'indexed' to account for inflation, bringing them to their value in the years just before you turn 62. Next, the SSA identifies your 35 highest indexed earnings years. These are summed and divided by 420 (the number of months in 35 years) to determine your Average Indexed Monthly Earnings (AIME). Finally, a progressive formula is applied to your AIME to calculate your Primary Insurance Amount (PIA), which is the benefit you receive at your full retirement age. For example, for 2023, the formula was 90% of the first $1,115 of AIME, plus 32% of AIME between $1,115 and $6,721, plus 15% of AIME over $6,721. This PIA is then adjusted based on your claiming age.

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