Keep a deceased person’s Social Security card, or at least a secure record of the number, until every estate task is finished. In practice, that means holding onto it for at least three years after the final federal tax return is filed, and closer to six or seven years if the finances were complicated. The physical card has no legal use once the death is reported, but the nine-digit number itself stays in demand far longer than most families expect.
Why the Number Outlives the Card
Almost every step in settling an estate asks for the deceased’s Social Security number. It appears on the final federal income tax return, on the estate’s own tax filings if the estate earns income during probate, and on IRS Form 56, which executors and personal representatives file to establish their authority.1Internal Revenue Service. Instructions for Form 56 Banks, insurers, credit bureaus, and the SSA itself all ask for it when you close accounts, claim survivor benefits, or apply for the one-time death payment.
So the real question isn’t how long the piece of cardboard has value. It’s how long institutions will keep asking for the number printed on it. That answer is set mostly by the IRS.
The IRS Clock Sets the Real Timeline
The general statute of limitations for the IRS to assess additional tax is three years after a return is filed. If a return understates gross income by more than 25%, that window stretches to six years. If no return was filed, or a fraudulent one was filed, there is no time limit at all.2Office of the Law Revision Counsel. 26 USC 6501 – Limitations on Assessment and Collection3Internal Revenue Service. How Long Should I Keep Records?
Because the deceased’s SSN appears on the final income tax return, on any estate tax return that was required, and on Form 56, you need to be able to produce that number for as long as those returns could be questioned. For most estates that means at least three years after the final return is filed. For estates with complex finances, foreign assets, or any reporting the IRS might challenge, six to seven years is the safer floor.3Internal Revenue Service. How Long Should I Keep Records?
Once you are past that window and every account, benefit claim, and probate proceeding is closed, the number no longer serves any official purpose.
Other Deadlines That Keep the Number in Play
A few benefits deadlines can extend the period you need the SSN handy, even if the tax picture is simple.
The lump-sum death payment of $255 must be claimed within two years of the death.4Social Security Administration. Lump-Sum Death Payment Monthly survivor benefits for spouses, ex-spouses, dependent children, and dependent parents are claimed on the deceased worker’s earnings record, and every application requires the deceased’s SSN along with a certified death certificate and proof of relationship.5Social Security Administration. Survivors Benefits – Section: How Do I Apply for Benefits? A surviving spouse may not claim right away; someone widowed at 55, for example, might not file until age 60. The number needs to be reachable when they do.
Financial cleanup can also take longer than expected. After a death is reported, the SSA adds the person’s SSN, name, and dates of birth and death to its death records, and shares versions of that file with federal agencies, state agencies, and, through the Department of Commerce, with banks and credit companies.6Social Security Administration. Requesting SSAs Death Information Institutions use those records to flag accounts, which is useful for fraud prevention but can freeze funds the estate still needs. Sorting that out means proving identity with the SSN again.
How to Store the Number, and When to Destroy the Card
Record the SSN somewhere secure and separate from the card itself. A locked filing cabinet, a safe deposit box, or a password-protected digital file all work. Keep it with the other estate paperwork you’re already holding onto: the certified death certificate copies, the deceased’s most recent W-2 or self-employment return, marriage or divorce records if survivor benefits are in play, and birth certificates for any dependent children.
The physical card is a different matter. Once the number is recorded elsewhere, shredding the card eliminates one route for misuse. There is no legal requirement to return it to the SSA or destroy it, so some families keep it with other personal documents. Either choice is fine as long as the card is stored securely until you decide.
When the IRS window has closed and every account and claim is settled, the record of the number can go too. Shred paper copies. Delete digital ones from wherever they’ve been stored.
Protecting the Identity While You Still Hold the Number
Identity thieves target deceased people because fraudulent activity often goes undetected for months. The SSA’s death records help, but they don’t reach every corner of the financial system right away.
Contact each of the three major credit bureaus (Equifax, Experian, and TransUnion) to report the death and ask for a deceased alert on the file. Once the alert is in place, new credit applications under that SSN should be blocked. Pull the deceased’s credit reports at the same time and read them carefully. Accounts you don’t recognize can be a sign of fraud that started before the death was reported.
Treat the stored SSN with the same care you would your own. The person is gone; the number, until you’re safely past the IRS clock and every claim is closed, still opens doors.