Social Security has to be told, and told early. In most cases the funeral home reports the death to the Social Security Administration for you, using the deceased's Social Security number. It is not automatic and it is not guaranteed. Confirm the funeral home did it. If you are not sure, report it yourself by calling 1-800-772-1213 or visiting a local office. You cannot report a death to Social Security online.[1]
Once Social Security has the death on file, benefits stop. A person has to live the entire month to be owed that month's payment, and Social Security pays in the month after it is due, so a payment that arrives after the death usually has to be returned. Do not spend it. If benefits were direct-deposited, the bank is typically instructed to return the funds; if paper checks arrive, do not cash them.[1]
The same call is where survivor money starts. A surviving spouse or dependent child may qualify for monthly survivor benefits, and a surviving spouse who was living with the person, or an eligible dependent child, may receive a one-time lump-sum death payment of $255.[1] Reporting the death through Social Security also covers Medicare, so you do not have to notify Medicare separately.[2]