Updated · Built and checked by the PlinzoTools team, formulas tested against published sources
Estimate how claiming Social Security early or late adjusts your monthly benefit compared to your full retirement age amount.
This tool estimates the percentage adjustment to your Social Security benefit based on when you claim relative to your full retirement age (FRA): a reduction of 5/9 of 1% per month for the 36 months immediately before FRA (working out to a 25% reduction at exactly 4 years early for an FRA of 66), plus 5/12 of 1% per month for any additional months earlier than that; or an increase of 8% per year (2/3 of 1% per month) for each month you delay past FRA, up to age 70.
Enter your birth year (to determine your FRA) and your planned claiming age. Optionally enter your estimated FRA monthly benefit (from your Social Security statement) to see an adjusted dollar estimate. Your percentage adjustment appears instantly.
The tool first looks up your full retirement age (FRA) from your birth year. Anyone born from 1943 through 1954 has an FRA of 66. For birth years 1955 through 1959 the FRA rises by two months per year (someone born in 1957 gets 66 years and 6 months, for example), and anyone born in 1960 or later has an FRA of 67. It then compares your chosen claiming age against that FRA, counted in months, and applies the reduction or increase rules described above.
One detail worth knowing: the claiming age field takes whole years (62 through 70). If you plan to claim at, say, 63 and 6 months, you can enter 63 or 64 and treat the result as a bracket, or estimate somewhere between the two. Delayed credits are also capped at age 70, so entering a higher age will not increase the figure beyond the age-70 amount.
Early claiming: reduction = (first 36 months early x 5/9 of 1%) + (any earlier months x 5/12 of 1%). Late claiming: increase = months past FRA x 2/3 of 1%, up to age 70.
Suppose someone was born in 1985, so the FRA is 67, and their statement shows a hypothetical FRA benefit of 2,000 dollars per month. Consider three claiming ages:
The gap between claiming at 62 and 70 in this example is more than 1,000 dollars per month, for life. That is why the decision deserves more thought than simply taking money as soon as it is available.
This is an estimate for planning conversations, not an official benefit determination. For your exact figure and for questions about spousal, disability or survivor rules, use your my Social Security account or contact SSA directly. A fee-only financial planner can help you model claiming strategies alongside your other income.
Create a free account at ssa.gov to view your personalized benefit statement, which shows your estimated benefit at different claiming ages based on your actual earnings history.
No -- delayed retirement credits stop accruing at age 70, so there's no additional benefit increase for waiting beyond that age.
No. It compares claiming ages using your FRA benefit as the base. Cost-of-living adjustments apply to benefits after the initial amount is set, so they work on top of the figure shown here.
Your FRA depends on your birth year under SSA's schedule, and the size of each early or late adjustment is measured against it. Entering the birth year lets the tool derive the FRA automatically and show it beside the result.
Retirement benefits generally cannot start before 62, so the useful range is 62 through 70. Results for ages outside that range should not be treated as meaningful.
That is a personal decision that depends on your circumstances, spouse, and other income. The calculator only shows the monthly percentage difference, so consider speaking with SSA or a financial professional before deciding.
Reference: Social Security Administration