Updated August 6, 2026. Quick answer: an unmarried partner receives no spousal benefit and no survivor benefit, however long you have lived together. Social Security has no category for you. There are two things worth knowing anyway: a common-law marriage counts if your state recognised one, and your children’s benefits do not depend on whether you ever married.
Why there is no partner benefit
The benefit categories are written in terms of marriage and nothing else. 20 C.F.R. §404.330 conditions a spouse’s benefit on being “the insured’s wife or husband based upon a relationship described in §§404.345 through 404.346”, and the widow’s and widower’s benefits at 42 U.S.C. §402(e) and (f) are built the same way. There is no length of cohabitation that converts into eligibility on its own. But there is a route in, and we previously said there was not. The same regulation looks to state law, and where a state’s intestacy law would give a registered domestic partner or civil union partner the share a spouse takes, SSA can treat that relationship as marital for benefit purposes. California is the clearest case — Fam. Code §297.5 gives a registered partner a spouse’s intestate share. It is state-dependent, it is not automatic, and the nine-month duration rule below still applies. If you are registered anywhere, this is worth asking SSA about directly rather than assuming the answer is no.
It is worth being precise about what is lost, because it is usually the largest single number in an older couple’s planning. A married survivor can step up to the higher of the two benefits for life. An unmarried survivor keeps their own and nothing else.
The one exception: a marriage you may already have
Social Security does not ask whether you had a ceremony. It asks whether the state says you are married. 20 C.F.R. §404.345: “To decide your relationship as the insured’s wife or husband, we look to the laws of the State where the insured had a permanent home when you applied… To decide your relationship as the insured’s widow or widower, we look to the laws of the State where the insured had a permanent home when he or she died.”
So in a state that recognised common-law marriage, a couple who met its requirements is married for Social Security purposes, with no licence and no ceremony. That matters to long-term couples far more often than they expect, and it is worth establishing while both of you are alive rather than leaving a survivor to prove it afterwards.
Do not confuse this with the deemed valid marriage at §404.346, which is a different doctrine entirely: a good-faith ceremonial marriage defeated by a legal impediment, such as an undissolved earlier marriage. The two get run together constantly and they solve different problems.
Your children are not affected
This is the part most couples in this position have never been told. A worker’s child qualifies for benefits regardless of whether the parents married. 20 C.F.R. §404.355 gives four independent routes: the child could inherit as the natural child under the applicable state’s intestacy law; the parents attempted a ceremonial marriage defeated by a legal impediment; the insured acknowledged the child in writing, was decreed by a court to be the parent, or was ordered by a court to pay support; or other evidence of parentage exists together with proof that the insured lived with the child or contributed to their support.
Marital status appears in none of them. A child’s survivor benefit, and a disabled adult child’s benefit on a parent’s record, are unaffected by the parents never having married.
If you do marry, the clock is nine months
A survivor benefit generally requires that “[y]our relationship to the insured as a wife or husband lasted for at least 9 months immediately before the insured died” (20 C.F.R. §404.335). The exceptions are real and specific: accidental death, death in the line of duty on active military service, a prior marriage to the same person lasting nine months, being the natural parents of a child together, and already being entitled to a survivor-type benefit the month before the marriage.
Nine months is short. For couples weighing this at older ages it is usually the smallest of the considerations rather than the decisive one — the whole calculation, including what marrying can cost you, and separately what remarriage does to a benefit you are already receiving.
Sources
20 C.F.R. §§404.330, 404.335, 404.345, 404.346 and 404.355, and 42 U.S.C. §402, read at the Legal Information Institute on 2026-08-06. Quotations are from the regulation text.
Honest gap: which states recognise common-law marriage, and on what conditions, is a state-by-state question this page does not answer. It decides the exception above, so treat it as the thing to check rather than something to assume either way.
See methodology and corrections. General information about published statutes, not legal advice. No affiliate links, nothing sold.