US Social Security Calculator: Benefits by Claiming Age
Estimate your monthly Social Security check based on claiming age: early at 62 (-30%), FRA at 67 (100%), or delayed at 70 (+24%).
Social Security: benefit by claiming age, from 62 to 70
Your US Social Security benefit depends on when you claim it: for anyone born in 1960 or later, full retirement age (FRA) is 67, claiming at 62 cuts the benefit by 30%, and each year of delay after 67 adds 8%, up to 124% at 70. The tool recalculates these percentages from the full retirement age of your birth year and applies them to your full-retirement-age benefit (PIA).
The grid applied (born 1960 or later)
| Claiming age | % of PIA |
|---|---|
| 62 | 70% |
| 63 | 75% |
| 64 | 80% |
| 65 | 86.7% |
| 66 | 93.3% |
| 67 | 100% |
| 68 | 108% |
| 69 | 116% |
| 70 | 124% |
The reduction is 5/9 of 1% per month for the 36 months before FRA, then 5/12 of 1% per month beyond; delayed credits add 8% a year (7.5% for 1941-1942, 7% for 1939-1940, 6.5% for 1937-1938, 6% for 1935-1936). The tool derives your FRA from your birth year (66 for 1943-1954, then 2 more months per year up to 67 for 1960 and later) and builds the grid from it: born in 1957 (FRA of 66 and 6 months), 72.5% at 62 and 128% at 70; born in 1954 (FRA of 66), 75% and 132%.
Example (default values)
Born in 1965, PIA of $2,400 a month. Claiming at 62: $1,680 a month; at 67: $2,400 ($28,800 a year); at 70: $2,976. Cumulatively and without cost-of-living increases, claiming at 70 overtakes claiming at 62 around age 80.4, the value the tool calculates (80.5 with an FRA of 66); 67 overtakes 62 around 78.7.
Limits
- Whole ages only, constant dollars: no annual COLA (2.8% on 1 January 2026), no earnings test (above $24,480 of earnings in 2026 before FRA), no tax and no spousal benefits.
- Your actual PIA appears on your my Social Security statement. Estimate only, not financial advice.
Sources and dates: ages and percentages from the Social Security Administration (Retirement Benefits Planner, Retirement Benefits 2026 booklet); 2.8% COLA and $24,480 earnings-test limit for 2026 (SSA 2026 COLA fact sheet, release of 24/10/2025) (checked on 14/10/2026).
Frequently Asked Questions
How much do I lose by claiming Social Security at 62?
30%, permanently, for anyone born in 1960 or later, whose full retirement age is 67. With a $2,400 PIA, the benefit drops to $1,680 a month instead of $2,400.
How much more do I get by waiting until 70?
Each year of delay past full retirement age adds 8%, giving 124% of PIA at 70 with an FRA of 67. With a $2,400 PIA that is $2,976 a month. Credits stop at 70, so waiting longer adds nothing.
At what age does waiting until 70 pay off?
Adding up benefits without cost-of-living increases, claiming at 70 overtakes claiming at 62 at about age 80.4; that is the value the tool calculates, taking your full retirement age into account (80.5 with an FRA of 66). Claiming at 67 overtakes 62 at about 78.7, and 70 overtakes 67 at about 82.5.
What is full retirement age by birth year?
66 for people born from 1943 to 1954, then 2 more months per birth year (66 and 10 months for 1959) and 67 from 1960 on. The tool shows this FRA and builds its percentage grid from it.
Is this tool really free?
Yes, all tools on Kristools are 100% free and accessible without registration.
Is my data protected?
Yes. All processing is performed directly and securely inside your browser. No personal data is sent to our servers.