Social Security Calculator

This calculator starts from your Primary Insurance Amount rather than trying to rebuild it. PIA is the monthly retirement benefit tied to claiming exactly at full retirement age, and the reliable source is the full-retirement-age estimate on your Social Security Statement or my Social Security account. Reconstructing PIA requires 35 years of wage-indexed earnings run through SSA’s bend-point formula, and an incomplete earnings history produces a confidently wrong number, so the form asks for the figure SSA already computed for you. Full retirement age comes from 20 CFR 404.409 and depends only on birth year. It is 65 for anyone born in 1937 or earlier, then rises two months per year through the 1938–1942 cohorts, sits flat at 66 for 1943 through 1954, rises two months per year again across 1955 through 1959, and reaches 67 for anyone born in 1960 or later. If you were born on January 1, SSA’s age rule assigns you to the previous year, which can shift your FRA by two months. Claiming early applies a two-tier reduction, and the tiers are exact fractions rather than round percentages. Each of the first 36 months before FRA costs 5/9 of 1% of PIA; every additional early month costs 5/12 of 1%. With an FRA of 67, claiming at 62 is 60 months early: 36 months at 5/9 of 1% is 20%, plus 24 months at 5/12 of 1% is 10%, for a 30% cut leaving 70% of PIA. Someone with an FRA of 66 is only 48 months early and keeps 75%. Claiming after FRA earns delayed retirement credits of 2/3 of 1% per month — 8% a year — for anyone born after January 1, 1943, and those credits stop dead at age 70. An FRA of 67 delayed to 70 gives 124% of PIA; an FRA of 66 delayed to 70 gives 132%. Waiting past your 70th birthday adds nothing. The rounding is more particular than most tools admit, and it is the detail that makes results match an SSA worksheet to the dollar. The age factor is applied to PIA and carried to a dime, and only then is the payable amount floored to the next lower whole dollar. Delayed credits are handled as an increase computed and rounded separately, then added to PIA, because a decimal approximation of 2/3 of 1% can otherwise lose a dime. A payable amount below $1 keeps its cents rather than rounding to zero. Round the percentage first, or round to the nearest dollar, and you can be off by a dollar every month for life. The break-even figure divides the benefits you gave up by waiting by the monthly amount you gained, giving the age at which the later strategy overtakes claiming at 62 in cumulative dollars. Treat it as arithmetic, not advice: it carries no cost-of-living adjustments, no investment return, no tax, no discounting, no earnings test, and no survivor or spousal benefit — and for a married couple the larger survivor benefit a delayed claim leaves behind often outweighs the crossover entirely. Cost-of-living adjustments are left out because both early and delayed benefits generally receive the same percentage increase after entitlement, so omitting them keeps the timing comparison clean while making the dollar totals a comparison rather than a forecast. Because Social Security is only one leg of the stool, weigh the result alongside a retirement calculator for the whole picture, and an annuity calculator if you are pricing what an equivalent guaranteed income stream would cost to buy.