Social Security Benefits Guide

Core Benefit Calculation

Social Security benefits are based on your average indexed monthly earnings (AIME) over your 35 highest-earning years. The Primary Insurance Amount (PIA) formula uses "bend points" to calculate your base benefit amount. As of 2025, the formula is:

90% of first 1,143USD of AIME + 32% of AIME between 1,143USD and 6,889USD + 15% of AIME over 6,889USD

These bend points are adjusted annually for inflation through Cost of Living Adjustments (COLA). The most recent COLA was 2.5% for 2025.

Full Retirement Age

Your full retirement age (FRA) depends on your birth year:

Born in 1955: 66 years and 2 months Born in 1956: 66 years and 4 months Born in 1957: 66 years and 6 months Born in 1958: 66 years and 8 months Born in 1959: 66 years and 10 months Born in 1960 or later: 67 years

Early vs. Delayed Retirement

Taking benefits before your FRA permanently reduces them. The reduction is calculated monthly:

• At age 62: Maximum reduction of about 30%
• Between 62 and FRA: Reduction decreases as you approach FRA
• Each month you delay past FRA increases benefits by about 0.67% (8% per year)
• Delayed retirement credits stop at age 70

The exact reduction percentage depends on how many months early you claim. The first 36 months before FRA reduce benefits by 5/9 of 1% per month. Beyond 36 months, the reduction is 5/12 of 1% per month.

Work History Impact

Your benefit calculation uses your 35 highest-earning years. Years without earnings count as zeros. Working longer can:

• Replace zero-earning years with earning years
• Replace lower-earning years with higher-earning years
• Increase your average indexed monthly earnings (AIME)

A minimum of 40 credits (approximately 10 years of work) is required to qualify for benefits.

Working While Receiving Benefits

If you claim benefits before FRA and continue working:

• Earnings above annual limits will reduce your benefits
• The reduction is 1 USD for every 2 USD earned above the limit
• At FRA, benefits are recalculated to credit back months when benefits were withheld
• After FRA, no earnings limits apply

Spousal Benefits

Married individuals can claim:

• Their own retirement benefit based on their work record
• Up to 50% of their spouse's FRA benefit amount
• The higher of the two amounts (not both)

Spousal benefits are reduced if claimed before FRA. They do not increase beyond FRA and are not eligible for delayed retirement credits.

Taxation and Government Pensions

Benefits may be subject to federal income tax if your combined income exceeds certain thresholds. Up to 85% of benefits can be taxable, depending on your total income and filing status.

The Government Pension Offset (GPO) and Windfall Elimination Provision (WEP) may reduce benefits if you receive a pension from work not covered by Social Security.

Using the Calculator

To get the most accurate estimate:

Input your actual earnings history when possible. The calculator uses a simplified AIME calculation, but provides a reasonable estimate of future benefits.

Try different retirement age scenarios to understand how timing affects your benefits. The calculator assumes an average life expectancy of 85 years when projecting lifetime benefits.

Remember that benefit estimates are based on current law and assume you'll continue earning at similar levels until retirement.

Additional Planning Considerations

Social Security typically replaces about 40% of pre-retirement income for average earners. Consider additional retirement savings to maintain your desired standard of living.

Review your Social Security statement annually to verify your earnings record is correct. Errors could affect your future benefits if not corrected.

The Social Security Administration provides detailed benefit information through their website at www.ssa.gov, including access to your personal earnings record and benefit estimates.

Regular updates to bend points, income limits, and benefit amounts help maintain purchasing power over time. The calculator automatically incorporates these adjustments in its projections.