Gather your old employer names, dates of employment, and any past addresses
Check old pay stubs, W-2s, tax returns, and benefit statements
Search your email and paper records for 401(k) plan documents or account statements
Contact former employers’ HR or benefits departments
Ask the former employer which financial institution or plan administrator handled the 401(k)
Contact the plan administrator directly with your personal information
Use the National Registry of Unclaimed Retirement Benefits
Check the U.S. Department of Labor’s abandoned plan search tools
Search your state’s unclaimed property database
Review any old IRA rollovers if the 401(k) may have been moved
Contact the Social Security Administration for earnings history if needed to confirm employment dates
Call the IRS if you need help locating tax-related retirement account records
Check with current or past financial advisors or brokerage firms
Look for any old account numbers, statements, or rollover checks
Verify whether the account was cashed out, rolled over, or left with the plan
Keep a list of each search result and follow up on any leads