Short answer: To find an old 401(k), start with the places that already have a record of it: your Fidelity NetBenefits login, old statements and tax forms, and your former employer’s HR or plan administrator. If those fail, search the U.S. Department of Labor’s Retirement Savings Lost and Found database at lostandfound.gov, your state’s unclaimed property office, and your Social Security earnings record to list past employers. Your account number is on your statements and, for plans at Fidelity, in NetBenefits.
Step 1: Check Fidelity NetBenefits and Full View
- If the old plan was at Fidelity, log in to NetBenefits and look at the list of plans and accounts. Old plans may still appear there.
- Use Fidelity Full View to add accounts held at other providers. See our guide to adding a NetBenefits 401(k) to Full View.
- Search your email for messages from Fidelity or NetBenefits, even from years ago.
Step 2: Look for Paper and Email Records
- Old statements and welcome letters list the plan name, provider and account number.
- Form 1099-R shows distributions and the payer’s name. Summary plan descriptions and enrollment emails also name the provider.
- Old pay stubs show 401(k) deductions, confirming you participated.
Step 3: Contact Your Former Employer
Ask the HR or benefits team who administers the plan, and for the plan name and plan number. If the company was acquired or closed, ask the successor company or look at the plan’s Form 5500, which lists the plan sponsor and administrator. You can search Form 5500 filings on the Department of Labor’s EFAST website.
Step 4: Search the Department of Labor Lost and Found Database
- The database at lostandfound.gov was created under SECURE 2.0 to help people find retirement plans where they once participated.
- You need an identity-verified Login.gov account, which uses your Social Security number and a photo of a state-issued ID.
- A result tells you which plan and contact to ask. It does not confirm that you are owed benefits, and the information can be outdated.
- It does not cover IRAs and some government and religious plans.
Step 5: Check Unclaimed Property and Other Sources
- State unclaimed property. Plans sometimes send dormant balances to the state. Search your state’s unclaimed property website or the national site missingmoney.com.
- Social Security earnings record. Your my Social Security account lists the employers that reported your earnings, which jogs memory about old jobs.
- PBGC. If a pension plan ended, the Pension Benefit Guaranty Corporation has a search for unclaimed pensions.
Small Balances May Have Been Moved
Plans can move small balances out of the plan when you leave. Under current law a plan may force out balances up to $7,000, and balances over $1,000 are generally rolled into an IRA in your name. So your money may be sitting in an IRA at a different provider than you expect. Ask the former plan administrator whether a forced transfer happened.
How to Find Your Fidelity 401(k) Account Number
- On a statement: The account number is printed near the top of quarterly statements.
- In NetBenefits: Open your plan and look for account or plan details. For rollovers, Fidelity often asks for the plan name and your account information.
- Ask your plan administrator if you cannot find it. Do not share your account number with anyone who contacts you first.
For a rollover, you give the account number of the receiving account at Fidelity, and the plan name and account details of the old plan. See our rollover guide.
What to Do Once You Find It
- Check the balance, the investments, and any fees. See our 401(k) fees guide.
- Decide whether to leave it, roll it to your new employer’s plan, or roll it to an IRA. See what to do with your 401(k) after leaving a job.
- Update your beneficiaries and your address so you do not lose track again.
Be careful of scams. Fake “401(k) recovery” services charge fees for work you can do free. Never pay to find your own account, and only use official government and Fidelity websites.
Frequently Asked Questions
How do I find an old Fidelity 401(k)?
Check NetBenefits and Full View, then your old statements, your former employer, and lostandfound.gov.
How do I find my Fidelity 401(k) account number?
On your statement or in NetBenefits under your plan details. Your plan administrator can also help.
Can I find an old 401(k) with my Social Security number?
The Department of Labor Lost and Found database uses your identity-verified Login.gov account, which is tied to your Social Security number. Be wary of any other site that asks for it.
What happens to an abandoned 401(k)?
It may stay in the plan, be moved to an IRA in your name, or be sent to state unclaimed property. Contact the plan administrator.
Is there a fee to find a lost 401(k)?
The government tools are free. Avoid services that charge a fee.
UseFidelity.com is an independent site and is not affiliated with Fidelity Investments. This article is general information, not tax, legal or investment advice. Figures last checked 3 November 2026.
Sources
- U.S. Department of Labor Retirement Savings Lost and Found (lostandfound.gov), as described by Retirement Savings Lost and Found coverage at Rethinking65
- IRS and Department of Labor guidance on forced-out small balances under SECURE 2.0