Social Security replaces a portion of your pre-retirement income based on your lifetime earnings. It is not designed to be your only retirement income.
How benefits are calculated
The Social Security Administration averages your highest 35 years of inflation-indexed earnings, then applies a progressive formula that replaces a larger percentage of lower earnings. The result is your primary insurance amount, or the benefit at full retirement age.
Claiming age
Full retirement age is 67 for anyone born in 1960 or later. Claiming at 62 reduces your benefit by about 30%. Delaying past full retirement age raises it by 8% per year until age 70. The best age depends on health, other income, marital status and longevity expectations.
Planning tips
Create an account at ssa.gov to see your earnings record and estimated benefits. Check for errors. Married couples can coordinate claiming strategies, and survivors can take the higher of two benefits. Benefits may be partially taxable depending on your income.
Try the numbers
Use our Social Security Benefit Estimator to see this in practice. With its default example (Average annual earnings (indexed): $75,000; Years worked: 35; Claiming age: 67 (full)), it shows estimated monthly benefit: $2,746. Adjust the inputs to match your situation.
Key takeaways
- Benefits depend on your highest 35 years of earnings.
- Delaying until 70 increases the monthly benefit by about 8% per year.
- Check your earnings record at ssa.gov.
This article is for general education and is not personalized financial, tax or legal advice. Rules and limits change; confirm current figures with official sources such as IRS.gov, SSA.gov and StudentAid.gov, or consult a qualified professional. © 2026 FinanzCalc.