Social Security is a federal program that provides monthly income benefits to retired workers, disabled individuals, and survivors of deceased workers. Funded by payroll taxes, it is one of the most important sources of retirement income for American workers. Understanding how Social Security works — and when to claim your benefits — can be worth tens of thousands of dollars over your lifetime.
How Social Security Benefits Are Calculated
Your Social Security benefit is based on your 35 highest-earning years, adjusted for inflation. The Social Security Administration (SSA) calculates your Average Indexed Monthly Earnings (AIME) and then applies a formula to determine your Primary Insurance Amount (PIA) — the monthly benefit you receive at your full retirement age.
The formula is progressive: it replaces a higher percentage of income for lower earners. In 2026, the formula replaces:
- 90% of the first $1,226 of monthly earnings
- 32% of earnings between $1,226 and $7,391
- 15% of earnings above $7,391
If you have fewer than 35 years of earnings, zero-income years are averaged in, which reduces your benefit. Working additional years can replace low-earning years and increase your benefit.
Full Retirement Age (FRA)
Your Full Retirement Age depends on your birth year:
- Born 1943–1954: FRA is 66
- Born 1955–1959: FRA phases from 66 and 2 months to 66 and 10 months
- Born 1960 or later: FRA is 67
You can claim as early as age 62 or as late as age 70. The timing affects your benefit amount significantly.
When to Claim: Early vs Late
This is the most important Social Security decision you will make:
- Claim at 62: Benefits are permanently reduced by up to 30% compared to your FRA amount.
- Claim at FRA (67): You receive your full calculated benefit.
- Claim at 70: Benefits increase by 8% per year past FRA, up to a 24% bonus over the FRA amount.
The break-even point for delaying from 62 to 70 is roughly age 80. If you expect to live past 80, delaying usually pays off significantly. If you have serious health issues or need the income, claiming earlier may make more sense.
Social Security Spousal Benefits
Married individuals can claim a spousal benefit worth up to 50% of their spouse’s PIA, if that is higher than their own benefit. This is relevant for spouses who had lower lifetime earnings or took time out of the workforce. You must be at least 62 to claim spousal benefits, and you cannot claim spousal benefits before your spouse begins collecting.
Divorced spouses may also qualify if the marriage lasted at least 10 years and you have not remarried.
Social Security and Taxes
Up to 85% of your Social Security benefits may be taxable depending on your “combined income” (adjusted gross income + nontaxable interest + half of Social Security benefits):
- Combined income below $25,000 (single) or $32,000 (married): no tax on benefits
- Combined income $25,000–$34,000 (single) or $32,000–$44,000 (married): up to 50% of benefits taxable
- Combined income above $34,000 (single) or $44,000 (married): up to 85% of benefits taxable
Tax-efficient withdrawal planning in retirement can reduce the amount of your benefits that are taxed.
How to Maximize Your Social Security Benefits
- Work at least 35 years. Every zero-earning year reduces your average and your benefit.
- Maximize earnings during your peak years. Higher earnings in the final decade before claiming can replace earlier low-earning years.
- Delay claiming if you can. Every year past FRA up to 70 adds 8% permanently.
- Coordinate with your spouse. The higher earner delaying to 70 maximizes the survivor benefit for the other spouse.
- Check your earnings record. Errors in the SSA’s records can reduce your benefit. Verify your record at ssa.gov annually.