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How are Social Security benefits calculated?

Financial Toolset Team5 min read

Benefits are based on your Average Indexed Monthly Earnings (AIME) from your highest 35 years of earnings. The Social Security Administration applies bend points to your AIME: 90% of the first $1,2...

How are Social Security benefits calculated?

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Understanding How Social Security Benefits Are Calculated

Social Security benefits are a fundamental part of retirement planning for many Americans, but understanding how these benefits are calculated can often seem daunting. In reality, the process is systematic and based on your earnings history. This article will break down the calculation into simple steps, providing clear examples and key considerations to help you plan effectively for your retirement.

The Three-Step Process to Calculate Social Security Benefits

Step 1: Average Indexed Monthly Earnings (AIME)

The foundation of your Social Security benefits is your Average Indexed Monthly Earnings (AIME). The Social Security Administration (SSA) calculates your AIME by looking at your 35 highest-earning years. Each year's earnings are adjusted for inflation to reflect national wage growth. If you haven't worked for a full 35 years, zeros are added for the missing years.

  • Calculation: Total your adjusted earnings for the top 35 years and divide by 420 months to get your AIME.

Step 2: Primary Insurance Amount (PIA)

Your AIME is then used to determine your Primary Insurance Amount (PIA), which is the monthly benefit you would receive at your full retirement age (currently 67 for those born in 1960 or later). The SSA uses a progressive formula with "bend points" to calculate your PIA. For 2025, these bend points are:

  • 90% of the first $1,226 of AIME
  • 32% of AIME between $1,226 and $7,391
  • 15% of AIME over $7,391

This approach ensures that lower earners receive a higher percentage of their pre-retirement earnings.

Step 3: Claiming Age Adjustments

Your actual benefit amount can vary depending on when you decide to start claiming. If you claim before reaching full retirement age, your benefits are reduced. Conversely, delaying your claim past full retirement age increases your benefit amount through delayed retirement credits.

Real-World Examples

Let's take a look at how this formula works with specific numbers:

  • Example 1: A worker with an AIME of $5,825 retiring in 2026 would have their PIA calculated as follows:

    • 0.9 × $1,226 = $1,103.40
    • 0.32 × ($5,825 - $1,226) = $1,468.80
    • Total PIA = $1,103.40 + $1,468.80 = $2,572.20 (before rounding)
  • Example 2: A higher earner with an AIME of $11,724 would receive:

    • 0.9 × $1,226 = $1,103.40
    • 0.32 × ($7,391 - $1,226) = $1,972.80
    • 0.15 × ($11,724 - $7,391) = $650.45
    • Total PIA = $1,103.40 + $1,972.80 + $650.45 = $3,726.65 (before rounding)

Common Mistakes and Considerations

Bottom Line

Understanding how Social Security benefits are calculated can empower you to make informed decisions about your retirement. By familiarizing yourself with the AIME and PIA calculations, and considering the impact of your claiming age, you can optimize your benefits. Remember, using tools such as the SSA's Online Benefits Calculator and creating a my Social Security account can provide personalized estimates based on your actual earnings record. Careful planning and informed decisions can help ensure financial stability in your retirement years.

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Benefits are based on your Average Indexed Monthly Earnings (AIME) from your highest 35 years of earnings. The Social Security Administration applies bend points to your AIME: 90% of the first $1,2...
How are Social Security benefits calculated? | FinToolset