Paths & Proofs

Social Security: couples

When should each of you start Social Security?

Claim early and you collect smaller checks for longer. Wait and you collect larger checks for less time. For a couple, one rule changes everything: when either spouse dies, the survivor keeps the larger of the two checks. So the higher earner isn't buying time for themselves — they're setting the floor the survivor inherits.

Your numbers

Start with an example, then adjust any number to match your own:

Lifetime benefits: waiting vs. claiming early

Each line is one strategy for the higher earner; the lower earner claims at the same age in both. The chart starts at the earlier of your two planning ages — that's when the model assumes the first spouse dies; the x-axis shows how long the survivor lives from there. Where waiting overtakes claiming early is your breakeven — if the longer-living spouse reaches past that age, waiting paid off.

What it works out to

Both lifespans at once

Each cell is a pair of lifespans colored by which strategy produces more lifetime household income. The two strategies differ only in the higher earner's claiming age — the lower earner claims at the same age in both (see legend). Every cell is computed independently; the white dot just marks your current planning ages. When the higher earner dies very young (left edge), both strategies produce similar totals — that's why those cells appear gray.

What this does and doesn't account for, and where the rules come from

This models a married couple: two benefit amounts, two claiming ages, the spousal benefit (a lower earner can draw up to 50% of the higher earner's full-retirement-age amount), and the survivor rule (when one spouse dies, the survivor keeps the larger of the two checks). It does not account for the earnings test if you keep working before full retirement age, income tax on benefits, or divorced-spouse benefits — each can move the answer.

Full retirement age by birth year. The "higher earner: birth year" and "lower earner: birth year" inputs set each person's full retirement age (FRA) using the SSA's actual table. Born 1960 or later: FRA is 67. Born 1943–1954: FRA is 66. Born 1955–1959: FRA steps up from 66 years 2 months to 66 years 10 months (two months per birth year). The default is 1960; if either of you was born before 1960, adjust that input.

The discount rate is the real (inflation-adjusted) return you assume you could earn on benefits taken earlier; a higher rate makes claiming early look better. At real returns above roughly 4–5%, early claiming tends to win even across long lifespans — that's the math working correctly, not an error. Most financial planning uses 2–3% real as a conservative baseline. The life-expectancy inputs are planning ages you choose — they're marked on the chart, not predictions, and you can move them to see how the answer shifts.

Cost-of-living adjustments (COLA) aren't modeled, but they scale both strategies equally and don't move the crossover — so they don't change which claiming age comes out ahead.

A real age gap, derived from your birth years. The model derives the age gap between you from the birth years you enter for each spouse, then advances each of you through your own age — offset by that gap — instead of assuming you're the same age. Worker, spousal, and survivor eligibility line up with your real timeline. The gap is a fixed whole-year offset derived from birth years, not exact birth dates. The "your planning age" marker always shows the later of your two chosen planning ages — in unusual cases that number won't exactly match what you typed for whichever of you the chart happens to be tracking at that point, though it's still marking the same underlying age.

What the chart shows. Two death orders are possible — the higher earner dies first, or the lower earner does — and they don't give the same answer: when the higher earner dies first, a widow(er) limit floors what the survivor inherits, which narrows the gap between claiming early and waiting. When the lower earner dies instead, the higher earner lives out the comparison on their own record with no such floor, so waiting's advantage shows up in full. Since which of you goes first isn't something this tool can know, the chart computes both orders for your numbers and shows whichever one is more cautious — the one that asks more of the survivor's lifespan before waiting pays off. That way the age shown holds regardless of which of you actually goes first. To see every combination of both lifespans at once, including the order not shown here, see the grid below.

Before state tax. These figures are benefits before any state tax. Most states — and the nine with no income tax — don't tax Social Security benefits at all. Eight still do in 2026 (Colorado, Connecticut, Minnesota, Montana, New Mexico, Rhode Island, Utah, and Vermont), each under income thresholds that exempt many retirees entirely. If you live in one and your income is above its limit, your after-tax numbers will be somewhat lower than shown — though because state tax tends to fall on both early and delayed benefits alike, it rarely changes which claiming age comes out ahead.

This is information to help you think, not financial advice.

Where the rules come from — each links to the government page that defines it: