For Millennials and Gen X-ers, it all depends on whether we can rein in spending after we stop working.

Roth 401(k)s are showing up in more workplaces, but only about 10% of eligible workers saved in one last year. That's a big mistake.

Save 15% of pay for 30 years and you will be fine, a new study shows. Save for longer, and it gets much easier.

Sure, young adults could get higher returns by investing in stocks, but many have good reasons to stay safe in cash right now.

Staying the course has rarely paid off so well as average retirement account balances soar.

Q: I just started my first job after college, and I want to sign up for my company’s 401(k). How should I invest it? A: By saving in a 401(k) plan while you're still in...