Many don't save during the early years of their career. But it might still be possible to catch up. Here's a look at how long ...

A retirement calculator can also help you estimate how much you need to save monthly to reach your goal, which is helpful in figuring out if you actually need to max out your 401(k) this year.

The average can vary dramatically by age group, and the average and median 401(k) balances are very different.