How Social Security Benefits Are Calculated in 2026

Social Security benefits are calculated from your 35 highest-earning years, each wage-indexed to account for inflation, then averaged to produce the Average Indexed Monthly Earnings (AIME). The AIME is run through a progressive benefit formula to produce the Primary Insurance Amount (PIA) — your monthly benefit if you claim at Full Retirement Age (67 for those born in 1960 or later). Claiming early at 62 permanently reduces this by approximately 25–30%; delaying to 70 increases it by about 24–32%.

How social security benefits are calculated

1. Build your earnings record — the SSA tracks your wages and self-employment income each year up to the Social Security wage base ($176,100 in 2025). You need 40 credits (10 years of work) to qualify for benefits.
2. Index past earnings to today's wages — the SSA multiplies each year's earnings by an index factor to account for wage growth since that year. Earnings from 1990, for example, are multiplied by a factor of approximately 3.5× to reflect 35 years of wage inflation.
3. Take the top 35 years and average them — the 35 highest indexed-earnings years are summed and divided by 420 months (35 × 12) to produce the AIME. Years with no earnings count as zero.
4. Apply the benefit formula — the AIME is run through the PIA formula with three "bend points" that provide higher replacement for lower earners.
5. Adjust for claiming age — the PIA is then adjusted up or down based on when you begin benefits relative to your Full Retirement Age.

The PIA benefit formula: 2025 bend points

The Primary Insurance Amount (PIA) is calculated as:

• 90% of the first $1,174 of AIME, plus
• 32% of AIME between $1,174 and $7,078, plus
• 15% of AIME above $7,078

The bend points ($1,174 and $7,078) are adjusted annually by the SSA. The progressive structure means a person with a $1,500 AIME receives a higher percentage of their earnings replaced (about 80%) than a person with a $5,000 AIME (about 42%). This is intentional — Social Security provides proportionally greater income replacement for lower earners.

Worked example: calculating a Social Security benefit

Claiming age: the biggest decision in Social Security

The age you claim Social Security is the single largest lever you control in your benefit amount. The permanent adjustments:

The breakeven point for delaying from 62 to 70 is typically around age 82–83. If you expect to live past 83, delaying to 70 maximises lifetime benefits. If health or financial need requires early claiming, the permanent reduction is the cost.

Authoritative sources

• Social Security Administration — PIA Formula and Bend Points — Official SSA documentation of the Primary Insurance Amount formula, bend points, and how they are adjusted annually — the primary reference for any Social Security benefit calculation.
• Social Security Administration — My Social Security Account — Your personal SSA account where you can view your actual earnings record, estimated benefit at different claiming ages, and verify your earnings history for accuracy.

Key takeaways

• Your Social Security benefit is calculated from your 35 highest earning years, wage-indexed for inflation. Years with zero earnings reduce the average — working a full 35 years maximises your AIME.
• The PIA formula is progressive: lower earners receive a higher replacement rate (up to 90% of AIME up to the first bend point). Higher earners receive proportionally less replacement.
• Claiming at 62 permanently reduces your benefit by 25–30%. Delaying to 70 increases it by 24–32% above your Full Retirement Age amount. The breakeven for delay is approximately age 82.
• The maximum Social Security benefit for someone retiring at FRA in 2026 is approximately $4,018/month — requiring the maximum taxable wage base ($176,100 in 2025) in 35 years of work.
• Check your SSA earnings record at ssa.gov/myaccount for errors. A missing year of earnings or an uncredited self-employment contribution permanently reduces your AIME — and thus your lifetime benefit.
• Social Security was designed to replace approximately 40% of pre-retirement income for average earners. Your retirement savings — guided by the right savings rate — should bridge the remaining gap.

Frequently asked questions

How is my Social Security benefit calculated?

Your benefit is calculated from your Average Indexed Monthly Earnings (AIME) — the average of your 35 highest-earning years, indexed for inflation. The AIME is run through a progressive benefit formula (called the Primary Insurance Amount, or PIA) that provides a higher replacement rate for lower earners. Claiming at 62 reduces the benefit permanently; claiming at 70 increases it by 8%/year above full retirement age.

What is the maximum Social Security benefit in 2026?

The maximum Social Security benefit for someone retiring at full retirement age (67 for those born after 1960) in 2026 is approximately $4,018/month. To receive the maximum, you must have earned the Social Security wage base ($176,100 in 2025) for 35 years. Most Americans receive significantly less — the average benefit in 2024 was approximately $1,900/month.

Does Social Security replace my full salary in retirement?

No. Social Security is designed to replace approximately 40% of pre-retirement earnings for average earners — less for higher earners due to the progressive benefit formula. Fidelity's retirement benchmarks assume Social Security replaces 55–65% of income for lower earners and 25–35% for higher earners. Your retirement savings should bridge the gap.

What happens if I claim Social Security at 62 vs 70?

Claiming at 62 (the earliest eligible age) permanently reduces your benefit by approximately 25–30% vs claiming at full retirement age. Claiming at 70 increases your benefit by 8% per year above full retirement age — roughly a 24–32% increase over claiming at 67. The breakeven point for delaying from 62 to 70 is typically around age 82.

Can I collect Social Security and still work?

Yes, but if you claim before full retirement age, earnings above the annual exempt amount ($22,320 in 2024) reduce your benefit by $1 for every $2 earned. In the year you reach full retirement age, the reduction is $1 for every $3 above a higher threshold ($59,520 in 2024). After reaching full retirement age, there is no earnings limit.