Social Security survivor benefits are the broadest source. A surviving spouse can claim from age 60 (50 if disabled), receiving a reduced amount then and up to 100% of what the deceased worker was entitled to at the survivor's own full retirement age, including any delayed retirement credits the worker earned. Minor children and dependent parents can also qualify, and a surviving divorced spouse can claim on a former spouse's record after a marriage of at least ten years. Nothing needs to have been elected in advance.
A pension survivor option works on the opposite logic. Federal law protects spouses here rather than leaving it to the participant's goodwill: a married participant in a private-sector pension must be offered a qualified joint and survivor annuity that continues at least half the benefit to the surviving spouse, and giving that up requires the spouse's own written, witnessed consent. The protection is real but it has a price: the joint-and-survivor payment is lower than a single life annuity, because the plan expects to pay it over two lifetimes instead of one.
The military's Survivor Benefit Plan follows the same election-in- advance pattern: a retiring member decides at retirement whether to cover a spouse, pays a premium out of retired pay, and needs the spouse's concurrence to decline or reduce coverage.
A commercial annuity pays a survivor only if its payout option says so. A single life annuity stops at the annuitant's death, however soon that comes; a joint and survivor annuity continues to a second person at a lower monthly amount. That choice is made at annuitization and is generally irreversible.
Life insurance is the one source that pays a lump sum rather than income, and it goes to whoever the beneficiary designation names, which is why a stale designation is one of the most common and most avoidable failures in this whole area. A will does not override it. Two cross-cutting rules are worth knowing. Taxation differs by source: a life insurance death benefit is generally received free of income tax, while a pension or annuity survivor payment is ordinary income, and Social Security survivor benefits are taxed under the same provisional income test that applies to any other Social Security benefit. Remarriage rules also differ: remarrying before 60 generally bars a Social Security survivor benefit on a former spouse's record, while remarrying at 60 or later does not, and a pension or annuity survivor benefit, once it is being paid, generally continues regardless.