If you searched for average 401k balance by age, start with one warning: averages run high because a smaller group of long-tenured, high-income workers pulls the number up. Median balances, access to a plan, income, and tenure usually tell the truer story.
The cleanest current age table comes from Fidelity's workplace-plan data, which covers 25.6 million 401(k) participants as of March 31, 2026. Vanguard's participant data gives us the longer trend. Federal Reserve, BLS, IRS, ICI, Census, Pew, and EBRI data help explain the bigger retirement savings by age picture.
This page is informational only. It is not investment, tax, or legal advice.

