About the Social Security Calculator
A social security calculator estimates your monthly US retirement benefit from average indexed monthly earnings and your chosen claiming age. When you claim has an enormous permanent effect — the difference between 62 and 70 is roughly 77 percent.
The formula
PIA from bend-point formula, adjusted for claiming ageAIME is average indexed monthly earnings over your highest 35 years. The primary insurance amount applies 90, 32, and 15 percent to successive earnings bands, then adjusts for when you claim.
How to use this calculator
- 1Enter your Average Indexed Monthly Earnings ($). The field starts at
5000, which you can overwrite. - 2Enter your Claiming Age. The field starts at
67, which you can overwrite. - 3Read the result straight away — it recalculates as you type, so there is no button to press. Use Share to copy a link that reopens the page with your exact numbers filled in.
Worked example
| Input | Value |
|---|---|
| Average Indexed Monthly Earnings ($) | 5000 |
| Claiming Age | 67 |
Result
PIA (at 67): $2280.92/mo
Benefit at age 67: $2280.92/mo
Annual Benefit: $27371.04
Those are the values the page loads with, so you can reproduce this result yourself and then change one field at a time to see what drives the outcome.
Understanding your result
The bend-point formula is deliberately progressive: the first band of earnings is replaced at 90 percent, the next at 32, and the highest at only 15. This means additional earnings late in a high-earning career add relatively little benefit, while the early bands do most of the work for lower earners.
Claiming age is the largest lever available. Claiming at 62 permanently reduces the benefit by about 30 percent against full retirement age; delaying to 70 increases it by about 24 percent above it. Delaying is effectively buying an inflation-linked lifetime annuity at a rate no commercial product matches, which makes it attractive for anyone with reasonable life expectancy and other income to bridge the gap.
Things worth knowing
- Benefits are based on your highest 35 years. Years with no earnings count as zero and drag the average down.
- Delaying past full retirement age earns roughly 8 percent per year until 70, after which there is no further increase.
- Spousal benefits can reach 50 percent of the higher earner's amount, and survivor benefits up to 100 percent.
- Working while claiming before full retirement age can temporarily withhold benefits above an earnings limit.
- Up to 85 percent of benefits become taxable at higher combined income levels.
Frequently asked questions
When should I claim social security?+
Delaying to 70 maximises the monthly amount, gaining roughly 8 percent per year after full retirement age. Claiming at 62 gives more years of smaller payments. Health, other income, and spousal considerations all matter.
How is my benefit calculated?+
From average indexed monthly earnings across your highest 35 years, run through a progressive formula that replaces 90, 32, and 15 percent of successive earnings bands, then adjusted for claiming age.
How much does claiming early cost me?+
About 30 percent permanently if you claim at 62 rather than a full retirement age of 67. The reduction does not reverse later, though it means eight additional years of payments.
Are social security benefits taxable?+
Up to 85 percent can be taxable depending on your combined income. Below certain thresholds they are untaxed, which makes withdrawal sequencing from other accounts worth planning.
What If Scenario