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How the SSA actually calculates your benefit

Social Security looks at all years of work where you paid FICA taxes, indexed for wage inflation up to the year you turn 60. It picks your highest 35 indexed years, sums them, and divides by 420 (35 years × 12 months) to get your Average Indexed Monthly Earnings (AIME). If you have fewer than 35 years of work, the missing years count as $0, which can dramatically pull down the average, especially for people who left the workforce early.

The AIME runs through the PIA formula with "bend points" updated annually. For 2026, the formula is: 90% of the first $1,226 of AIME, plus 32% of AIME from $1,226 to $7,391, plus 15% of any AIME above $7,391. The progressive structure means lower-income workers replace a higher percentage of their working income than higher-income workers. A worker with $30,000 average lifetime earnings might see a 60% replacement rate from SSA alone; a worker with $200,000 sees about 25%.

The 2026 Social Security wage base is $184,500 (set by 2025 SSA Cost-of-Living adjustment announcements). Income above that ceiling pays no FICA tax and doesn't count toward your benefit. Maxing out the wage base for 35 years gets you the maximum possible benefit. A worker who earned $184,500+ for 35 straight indexed years can expect roughly $4,000/month at FRA and around $4,990/month at age 70.

The age 62 vs 70 decision: the math and the realities

For someone with FRA of 67, filing at 62 produces about 70% of the FRA benefit (a 30% permanent reduction). Filing at 70 produces about 124% of FRA (8% annual delayed retirement credits for 3 years). The crossover age where total cumulative benefits paid by waiting equals total cumulative benefits from filing early is around age 80-82, depending on your specific FRA.

If you live past 82, waiting to 70 produces more total lifetime benefits. If you die before 82, filing at 62 was better. Average life expectancy at age 62 is now about 85 for men and 87 for women (SSA period life tables, 2024 update), so the math favors waiting for most healthy retirees. Health, family longevity history, and other income sources all factor into the right answer.

Strategic considerations beyond pure breakeven: Filing early locks in spousal benefits at lower rates. Filing late forces you to bridge income from other sources (taxable brokerage, IRA withdrawals, part-time work). Couples can stagger filings, one spouse files early for cash flow while the other waits to maximize the survivor benefit. The lower-earning spouse usually files early; the higher earner waits to maximize what will become the surviving spouse's benefit.

Other rules that affect your check

• Earnings test (filed before FRA): If you file at 62-66 and keep working, SSA withholds $1 for every $2 earned above $23,400 (2026 figure). The year you reach FRA, the limit jumps to $62,160 and the withholding is $1 for every $3 above. After FRA, no earnings test. Withheld benefits aren't lost, they're added back to your monthly amount once you reach FRA.
• Spousal benefits: A non-working or lower-earning spouse can claim up to 50% of the higher earner's PIA, starting at age 62 (reduced). Spouse must wait for the primary earner to file first (since 2016 changes ended "file and suspend" strategies).
• Survivor benefits: A widow/widower can collect 100% of the deceased spouse's full benefit at their own FRA. Starting at age 60, it's available at a reduced rate. This is why maximizing the higher earner's benefit by delaying often makes financial sense for couples.
• Windfall Elimination & Government Pension Offset (WEP/GPO): If you receive a pension from work that didn't pay FICA (some teachers, state/local government), your SS benefit can be reduced under WEP. The 2024 Social Security Fairness Act eliminated both for retirees claiming benefits in 2024 and later, a significant change for affected workers.
• Taxation of benefits: Up to 85% of SS benefits can be federally taxable above income thresholds (single $34K, married $44K provisional income). Thirteen states tax SS to some degree in 2026, most others fully exempt it. Roth IRA withdrawals don't add to provisional income, which is a strategic advantage in retirement planning.

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