The decision that outlives one spouse

When one spouse dies, the household generally keeps the larger of the two benefits, not both. Total Social Security income falls, often at the same time the survivor begins filing taxes as a single filer with narrower brackets.

This makes the higher earner's claiming age structurally different from the lower earner's. Delaying the larger benefit raises the floor for whichever spouse lives longer, which is why couples are frequently analysed as a pair rather than individually.

Spousal benefits, benefits for a surviving spouse, and benefits based on the record of a former spouse after a marriage of at least ten years all have their own rules and timing.

The rules are specific and the amounts are not trivial. Confirming the details against your own earnings record — rather than an estimate — is usually the first step.