Exactly...it's not like someone magically says "Stop! You cannot invest your money!" once you've maxed out your RRSP and TFSA contribution room. It just won't be a tax deferring or tax-free gains vehicle. Also, depending on how old he is, I would've waited longer before maxing out RRSP. It's smart to keep contribution room for when you hit your peak earning years (typically 40's-50's), as salaries tend to scale exponentially when you move up through the ranks.I know you mean RRSP/TFSA but there are certainly other investing options aside from those that will earn more than .1% interest