How to Find an Old 401(k)

Billions of dollars sit in forgotten workplace retirement accounts. People change jobs, the paperwork stops arriving, and a balance quietly stays behind. The good news: the money doesn't disappear, and every legitimate way of finding it is free. Work through these in order.

1. Contact the former employer

The fastest route. Ask HR or payroll for the name of the plan administrator — the company that actually holds the money, such as Fidelity, Vanguard or Empower. Then contact the administrator directly with your dates of employment and Social Security number.

If the employer was acquired or went out of business, keep going — the plan still exists somewhere.

2. Search the DOL Form 5500 database

Every workplace plan files an annual Form 5500 with the Department of Labor, and those filings are public and searchable at efast.dol.gov. Search by employer name. The filing lists the plan administrator and a contact — which is exactly what you need if the company no longer exists.

3. Try the Retirement Savings Lost and Found

The Department of Labor runs a national database, created under SECURE 2.0, designed for precisely this problem. It matches you against plans that have reported holding a balance for you. It's the newest tool on this list and worth checking even if the others come up empty.

4. Check the National Registry of Unclaimed Retirement Benefits

An industry-run registry where employers voluntarily list former employees with unclaimed balances. A free Social Security number search tells you whether a participating employer is holding something for you.

5. Check state unclaimed property

If a plan is terminated and the administrator can't find you, the balance can end up with the state as unclaimed property. Search missingmoney.com, plus the unclaimed property site for every state you've lived or worked in. There's more on this in our guide to finding unclaimed money and inheritance.

What to do once you find it

1. Roll it into an IRA or your current 401(k). A direct trustee-to-trustee transfer avoids withholding and keeps the money tax-deferred.
2. Don't take a cash-out unless you have to. You'll owe income tax, plus a 10% penalty if you're under 59½.
3. Name a beneficiary immediately. Old plans are the single most common place for a blank or badly out-of-date beneficiary form — and that form beats your will.
4. Write the account down somewhere your family can find it.

Doing this for someone who has died

The same databases work, but you'll need a certified death certificate and proof that you're the named beneficiary or the estate's executor. Start with the employer, then Form 5500, then the state. What happens to the money once you find it is covered in what happens to your 401(k) when you die.

And the reason this search is necessary at all: nobody wrote the account down. Keeping a current list of where your accounts live — in a digital inheritance vault, on paper, anywhere reachable — is what spares your family this entire exercise.