USA Today, using Vanguard data reports on the average 401(k) balance by age: Under 25: $5,236 25 - 34: $30,017 35 - 44: $76,354 45 - 54: $142,069 55 - 64: $207,874 65 and older: $232,710 This data is substantially lower than Fidelity's savings rate. With the possibility of an employer match, when available, contributing to a 401(k) is one of the best ways to meet your retirement goals.