5 Secrets of 401(k) Millionaires

Fidelity reports 769,000 401(k) millionaires in Q2 2026, up 19% from Q1. The average 401(k) millionaire is 59 years old with 26 years of investing experience. Key success factors include: starting early, steadily increasing contributions over time, automating savings to pay yourself first, capturing full employer matching, staying invested through market downturns, and keeping investments simple with low-cost index funds or target-date funds.