Social Security Calculator
Adjust the inputs below. Results update as you type.
How it works
Benefit is calculated from your top-35 earning years, indexed for inflation, to produce AIME (Average Indexed Monthly Earnings). PIA (Primary Insurance Amount) applies a progressive bend-point formula. Claiming at 62 reduces benefits by up to 30%; delaying to 70 increases by 8%/year after full retirement age. Break-even for delayed claiming is typically around age 80. Spousal and survivor benefits have separate rules.
Input guidance
- Use realistic rates from lender or provider quotes instead of headline averages.
- Model conservative, baseline, and optimistic scenarios before deciding.
- Include recurring real-world costs (fees, taxes, insurance, maintenance) where relevant.
The formula
Benefits are based on your highest 35 years of indexed earnings, converted to an average indexed monthly amount, then run through a progressive formula to set the benefit at full retirement age, adjusted up or down for the claiming age.
Worked example
Claiming at 62 permanently reduces the benefit by around 25–30% versus full retirement age, while delaying to 70 increases it by roughly 24–32% through delayed retirement credits.
More examples to test
- Conservative case: use a higher interest rate and lower growth assumptions to stress-test affordability.
- Optimistic case: use a lower rate with stable income assumptions to compare upside potential.
How to interpret results
Treat this as a planning model, not a final approval tool. Compare at least two scenarios and focus on total-cost and cash-flow trade-offs.
When this can be inaccurate
Results can diverge due to fees, changing rates, tax rules, lender policies, and behavior changes that simplified models cannot fully capture.
Change history
- July 2026: Quality-reviewed for publication with formula checks and explanatory copy updates.
Site-wide corrections also appear on the corrections log.
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Offers and rates vary by eligibility.
Frequently asked questions
When should I claim?+
Claiming early gives smaller checks for longer; delaying gives larger checks for a shorter time. Health, other income, and life expectancy drive the best choice.
How many years of work count?+
Your benefit uses your highest 35 earning years. Fewer than 35 years means zeros are averaged in, lowering the benefit.
Are benefits taxed?+
Up to 85% of benefits can be taxable depending on your combined income, so other retirement income can pull part of your Social Security into taxation.
How should I use this result?+
Treat it as a planning estimate. Compare at least two realistic scenarios, then confirm with statements, quotes, or a qualified professional before acting.
How often should I refresh assumptions?+
Refresh whenever rates, income, costs, or policy limits change materially, and before making irreversible commitments.
Guided next steps
Want the full workflow? Use this calculator inside a step-by-step guide.