Social Security Benefits Estimator
How It Works
Social Security is the foundation of retirement income for most Americans. The program provides monthly benefits based on your lifetime earnings, with the amount you receive depending heavily on when you choose to start collecting. Understanding how your benefit is calculated and how claiming age affects your payment is essential for making an informed retirement plan.
Your Social Security benefit is based on your Average Indexed Monthly Earnings (AIME), which represents your average monthly income across your 35 highest-earning years, adjusted for wage inflation. The Social Security Administration then applies a progressive formula to your AIME to determine your Primary Insurance Amount (PIA) — the benefit you would receive at your full retirement age. This formula uses "bend points" that change annually: in 2026, you receive 90% of the first $1,174 of AIME, 32% of AIME between $1,174 and $7,078, and 15% of AIME above $7,078.
Your full retirement age (FRA) is 67 if you were born in 1960 or later. If you claim benefits before FRA, your monthly payment is permanently reduced. Claiming at 62 — the earliest possible age — results in a reduction of up to 30% compared to your FRA benefit. The reduction is calculated as 5/9 of 1% per month for the first 36 months before FRA, and 5/12 of 1% for each additional month beyond 36.
Conversely, if you delay claiming past your FRA, you earn delayed retirement credits of 8% per year (2/3 of 1% per month) until age 70. This means that claiming at 70 gives you a benefit that is 24% higher than your FRA benefit. After age 70, there is no additional increase for delaying, so there is never a financial reason to wait past 70 to claim.
The optimal claiming age depends on your individual circumstances, including your health, other retirement income, spousal benefits, and whether you plan to continue working. While delaying increases your monthly payment, claiming earlier means you receive more total payments. A common break-even point is around age 80-82 — if you live beyond that age, delaying tends to produce more total lifetime income. This calculator helps you compare these tradeoffs by showing your estimated monthly benefit, annual income, and total lifetime benefits at different claiming ages.
Formula Breakdown
Social Security benefits are calculated using the Primary Insurance Amount (PIA) formula: Step 1 — Calculate AIME (Average Indexed Monthly Earnings): AIME = Annual Income / 12 (simplified proxy) Step 2 — Apply PIA Bend Points (2026): PIA = 90% of first $1,174 + 32% of ($1,174 to $7,078) + 15% above $7,078 Step 3 — Apply Age Adjustment: If claiming before FRA (67): First 36 months early: reduce by 5/9 of 1% per month Additional months early: reduce by 5/12 of 1% per month If claiming after FRA (67): Delayed retirement credits: 2/3 of 1% per month (8% per year) up to age 70 Example with $75,000 income, claiming at age 62: - AIME = $75,000 / 12 = $6,250 - PIA = (0.90 x $1,174) + (0.32 x ($6,250 - $1,174)) = $1,056.60 + $1,624.32 = $2,680.92 - Months early = 60 (5 years before FRA of 67) - Reduction = (36 x 5/9 of 1%) + (24 x 5/12 of 1%) = 20% + 10% = 30% - Benefit at 62 = $2,680.92 x 0.70 = $1,876.64/month
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