Social Security Spousal Benefit Calculator

How this calculator works

A husband or wife can receive a Social Security benefit based on their spouse's work record, worth up to half of the worker's full benefit. If the spouse also has a benefit from their own work, SSA pays their own benefit first and adds a spousal "top-up" only if half the worker's benefit is larger. This calculator works out that combined amount.

The inputs. Enter the worker's Primary Insurance Amount (PIA), which is the worker's benefit at full retirement age (FRA), not the amount they actually receive. Then enter the spouse's own PIA (zero if they have no work record), the spouse's birth year, and the age at which the spouse will claim.

The formula.

1. Maximum spousal benefit = 50% of the worker's PIA.
2. Excess spousal amount = 50% of worker's PIA − spouse's own PIA. If the result is zero or negative, no spousal top-up is payable.
3. Spouse's own benefit is adjusted for claiming age: reduced by 5/9 of 1% per month for the first 36 months before FRA and 5/12 of 1% for each extra month.
4. The excess spousal amount is reduced by 25/36 of 1% per month for the first 36 months early, then 5/12 of 1% for each extra month.
5. Total = spouse's own (age-adjusted) benefit + reduced excess spousal amount.

Spousal benefits do not earn delayed retirement credits, so there is no gain from waiting past FRA to collect the spousal portion. With an FRA of 67, a spousal benefit claimed at 62 is 65% of the full spousal amount, which equals 32.5% of the worker's PIA.

Worked example. David's PIA is $2,400. His wife Ellen, born in 1962, has an own PIA of $800 and an FRA of 67. She plans to claim at 64, which is 36 months early. David has already filed for his benefits.

If Ellen waited until 67, she would receive her full $800 plus the full $400 top-up, a total of $1,200. Claiming at 64 costs her $260 a month for life. If you do not know the PIA figures, estimate them with our benefit calculator. Our spousal benefits guide explains eligibility in more depth, including the rules for divorced spouses.

Limits of this estimate. The tool assumes the worker has already filed for benefits, which is required before a spouse can collect on their record (divorced spouses can sometimes be an exception). It assumes the spouse is not caring for a qualifying child, which follows different rules. It does not apply the family maximum, which can limit total benefits when several relatives draw on one record. Because of deemed filing rules, people born in 1954 or later who apply for one benefit are generally treated as applying for both, so you cannot take only the spousal benefit and let your own grow.