Social Security Calculator

Estimate how claiming early or delaying past full retirement age changes your monthly Social Security check, using the SSA's official adjustment percentages.

Quick Facts

Early claim penalty
5/9% per month (first 36 mo.)
Then 5/12% per month beyond 36 months early
Delayed retirement credit
2/3% per month (8%/year)
Accrues from FRA up to age 70
Full retirement age (FRA)
66-67
Depends on your birth year

Results

Calculated
Monthly benefit at claiming age
—
Adjusted for early/delayed claiming
Percent of full (FRA) benefit
—
100% = claiming exactly at FRA
Change vs. FRA benefit
—
Dollars per month, +/-
Estimated annual benefit
—
Monthly benefit x 12

Ready

Enter your birth year, FRA benefit estimate, and planned claiming age, then press Calculate.

How this calculator works

Social Security lets you claim retirement benefits any time between age 62 and age 70, but the monthly amount changes depending on when you start. Your Primary Insurance Amount (PIA) — the benefit you'd receive at your full retirement age (FRA) — is fixed once you know your earnings record; the SSA publishes it on your online statement. This tool takes that FRA benefit and applies the Social Security Administration's official month-by-month adjustment formula to show what you'd actually receive at any claiming age from 62 to 70.

The formula

Your full retirement age depends on your birth year: it is 66 for anyone born 1943-1954, rises two months per birth year from 1955 through 1959, and is 67 for anyone born 1960 or later. From there, the SSA applies these adjustments per month away from FRA:

  • Claiming early (before FRA): the benefit is reduced by 5/9 of 1% for each of the first 36 months early, then by 5/12 of 1% for each additional month beyond 36 — claiming at the earliest possible age, 62, typically yields about 70-75% of the FRA benefit.
  • Claiming at FRA: you receive 100% of your PIA, with no reduction or increase.
  • Delaying past FRA (up to age 70): the benefit increases by 2/3 of 1% for every month you wait, equal to 8% per year — delaying all the way to 70 typically yields about 124-132% of the FRA benefit, depending on your exact FRA.

Delayed retirement credits stop accruing at age 70, so there is no benefit to waiting any longer.

Interpreting the results

The first result card is your adjusted monthly check at the claiming age you entered. The second shows that amount as a percentage of your full FRA benefit, so you can see the size of the reduction or increase at a glance. The third shows the dollar change per month versus claiming at FRA, and the fourth annualizes the adjusted monthly benefit.

Frequently Asked Questions

What is full retirement age (FRA)?
FRA is the age at which you receive 100% of your Primary Insurance Amount (PIA) with no early-claiming reduction or delayed credit. It is 66 for people born 1943-1954, increases by two months per birth year for 1955-1959, and is 67 for anyone born in 1960 or later.
How much do I lose by claiming at 62?
Claiming at the earliest allowed age, 62, means you are up to 60 months early if your FRA is 67. The reduction is 5/9% per month for the first 36 months (20%) plus 5/12% per month for the remaining 24 months (10%), for a total reduction of about 30% versus your FRA benefit.
Is it worth delaying benefits to age 70?
Delaying past FRA adds 2/3 of 1% per month, or 8% per year, up to age 70 — a guaranteed, inflation-protected increase that is hard to match with other low-risk investments. Whether it's "worth it" depends on your health, other income, and how long you expect to live; a longer expected lifespan generally favors delaying.
Where do I find my FRA benefit estimate?
The SSA calculates your Primary Insurance Amount from your 35 highest-earning, wage-indexed years using a bend-point formula. Rather than re-deriving that from raw earnings, use the estimate on your my Social Security statement (ssa.gov) as the FRA benefit input here — this calculator then shows how claiming earlier or later changes that number.