Social Security breakeven calculator

By Tom, CPA · Updated October 25, 2026

TL;DR: Enter your full-retirement-age benefit and two claiming ages. The calculator applies SSA's early-claiming reductions and 8%-a-year delayed credits, finds the age when waiting catches up in cumulative benefits, and lets you add a real discount rate.

Educational only, not tax, legal, or investment advice. Examples are illustrations, not predictions. Rules and limits change; verify current figures and talk to a qualified professional about your situation.

Find the age where waiting pays off. Then guess your lifespan. Every Social Security claiming decision trades smaller checks sooner for bigger checks later. This calculator does the arithmetic so you can focus on the hard part: deciding how long to plan for, and how much you value guaranteed inflation-adjusted income.

CPA Warning Label: The breakeven age is easy to compute and impossible to know if you'll reach. The calculator handles the first part.

Inputs

• PIA. Your primary insurance amount, the monthly benefit at full retirement age. Your SSA statement shows an estimate; early retirees should adjust it for zero years using the zero years calculator.
• Full retirement age. 67 for anyone born in 1960 or later. For birth years 1955 through 1959, it's 66 plus 2 to 10 months; enter it as a decimal, such as 66.5 for 66 and 6 months.
• Two claiming ages to compare, between 62 and 70.
• Discount rate. 0 gives the classic breakeven. A positive real rate values earlier dollars more, reflecting investment returns you might earn.

Reduction and credit math

SSA's rules, which the calculator follows:

• Before full retirement age: the benefit is reduced 5/9 of 1% for each of the first 36 months early, plus 5/12 of 1% for each additional month. With FRA 67, claiming at 62 is 60 months early: 20% + 10% = 30% reduction, matching SSA's published figure.
• After full retirement age: delayed retirement credits of 2/3 of 1% per month, 8% a year, for people born in 1943 or later, up to age 70.

Benefits are in today's dollars. COLAs raise both options proportionally, so they don't change a zero-discount breakeven.

Breakeven output

The breakeven age is the first month when cumulative benefits from the later claim equal or exceed those from the earlier claim. If you expect to live past it, waiting yields more total benefits; if not, claiming earlier does. The calculator also shows cumulative totals through 85 for a feel for magnitudes.

Illustration: PIA $2,000, FRA 67.

• 62 vs 67: $1,400 vs $2,000 a month, breakeven about 78.75.
• 67 vs 70: $2,000 vs $2,480, breakeven about 82.5.
• 62 vs 70: $1,400 vs $2,480, breakeven about 80.4. Through 85, the 70 claim has paid $446,400 vs $386,400.

Discount rate option

With a 2% real discount rate, the 62 vs 70 breakeven moves from about 80.4 to about 82.75. Higher rates push it later. The choice of rate is a judgment: if you'd otherwise draw from bonds earning a low real return, a low rate fits; if you believe you'll earn high returns on money you didn't need to withdraw, a higher rate fits. Remember the portfolio carries market risk; Social Security doesn't.

Caveats

• Breakeven isn't the whole story. Social Security also insures against outliving savings. See claiming strategies.
• Couples: the higher earner's claim affects the survivor benefit, which this single-person calculator doesn't model. See spousal and survivor benefits.
• Taxes, the earnings test and ACA MAGI are ignored.
• Policy risk: benefits could change; as of Oct 2026, no reform has been enacted.

How to read the result

Take the breakeven age and ask a simple question: is there a meaningful chance I, or my surviving spouse, will live past it? For most healthy 62-year-olds, the answer is yes. That doesn't automatically mean waiting is right, because money received earlier can be spent while you're most active, and because some people simply don't have the savings to bridge the gap. But it does mean the decision isn't a sure loss either way.

A useful exercise is to run three scenarios: a discount rate of 0, a modest real rate like 2%, and a higher one like 4%. If the breakeven stays within your plausible lifespan in all three, waiting is robust. If it only works at 0%, the case is weaker.

Illustration: comparing 65 and 68

Illustration: PIA $2,400, FRA 67. Claiming at 65 is 24 months early, a 13.33% reduction, for $2,080 a month. Claiming at 68 adds 8%, for $2,592. The breakeven with no discount is about 80.2: from 68 the later claim earns $512 more each month and must make up the $74,880 it gave up in the three years from 65 to 68. Run the calculator with your own numbers to see where your lines cross.