The bad news: most people will need far more than that for a comfortable retirement. The common 4% rule for example, dictates that $250,000 would provide only $10,000 a year in retirement income.

Of course, 401(k) balances are just a snapshot of the retirement savings landscape since savers often have multiple investments and accounts like Individual Retirement Accounts (IRAs) and annuities. Fidelity, for example, found IRA holders had an average balance of $92,200 in 2014