Social Security Spousal Benefit Calculator

The spousal benefit is described everywhere as half the higher earner's benefit. That figure is correct only if you claim at your own full retirement age, and only as an upper bound. Claim at 62 and it falls by 35%.

The reduction is also harsher than the one applied to your own benefit. Under 20 CFR 404.410 a worker's own retirement benefit is reduced by 5/9 of 1% for each of the first 36 months claimed early; a spousal benefit is reduced by 25/36 of 1% over the same months. That is a quarter faster. Beyond 36 months both fall at 5/12 of 1%.

So a spouse claiming five years early loses 35% of the spousal amount while a worker claiming five years early loses 30% of their own. The difference is small in percentage terms and large over a thirty-year retirement.

A worker who waits past full retirement age earns delayed retirement credits worth 8% a year up to age 70. This is the single strongest argument for waiting, and it is repeated constantly.

It does not apply to spousal benefits. The spousal amount is fixed at 50% of the higher earner's primary insurance amount from your full retirement age onward, and waiting adds nothing whatever. A spouse with no record of their own who delays from 67 to 70 receives exactly the same monthly amount and has simply forgone three years of payments.

For someone entitled on both records the position is mixed: your own benefit keeps growing to 70 while the spousal top-up does not. That means the answer depends on how much of your total is your own — which is exactly what this calculator separates out.

The related trap is that the spousal amount depends on the higher earner's benefit at their full retirement age, not on what they actually claim. Their delaying to 70 raises their own cheque substantially and does nothing at all for yours.

The common picture is that you receive whichever benefit is larger. The mechanic is different, and the difference matters when the two are claimed at different times.

If you qualify on both records you receive your own benefit plus the excess of the spousal amount over your own primary insurance amount. Each part carries its own reduction factor. A spouse with a $900 PIA against a $3,000 earner receives their own reduced $900 plus a reduced share of the $600 excess — not a flat $1,500 and not simply "the larger one".

Two conditions gate the whole thing. The higher earner must have filed for their own benefit before anything can be paid on their record. And anyone born after 1 January 1954 is subject to deemed filing: claiming either benefit is treated as claiming both, which closed the restricted application strategy of drawing a spousal benefit while your own grew to 70. That option survives only for people born on or before that date, a group now past 70.

Divorced spouses are treated more generously than most expect. If the marriage lasted at least ten years and you have not remarried, you can claim on an ex-spouse's record, and after two years of divorce they need not have filed at all. It has no effect on what they or their current spouse receive.