[Fezzik]

According to the IRS the maximim contribution to a Roth IRA is far less: $5,500.

https://www.irs.gov/retirement-plans/plan-participant-employ...

[jlgaddis]

Yep, though once you reach a certain age it goes up to $6,000/year.

The $18,000 number sounds familiar. I think that's the maximum annual contributon to a 401(k) but don't quote me on that.