That did make a lot of sense. Thank you so much for the explanation johnny847.
That also brings up an interesting point though. If you make too much for a Roth contribution and can, somehow, ever manage to reset your tIRA balances, you essentially have a perpetual Roth backdoor available to you. Once reset, is there a reason why you couldn't just make a $5500 non-deductible contribution to a fresh tIRA, immediately convert it to a Roth, and then repeat the same process every year going forward?
Once you do the reset, that's correct - just keep doing the backdoor every year as long as it still makes sense for you tax wise (as in your income is still high enough for you to be in this position).
At that point why not just remove the cap on the Roth contributions? Is the underlying assumption that most people can't get into this state to begin with, because they won't have the opportunity to reset tIRA balances?
Nobody ever said Congress makes laws that always makes sense ;)
All kidding aside, two things
1) Not everyone can do that reset though. Some 401k's just don't allow incoming tIRA rollovers.
2) It may have been an oversight when Congress passed the law. Apparently there are talks about closing this backdoor - a way of raising taxes without actually having to raise taxes.
Oh yeah, just a terminology thing that I don't think you used incorrectly, but I've seen other people do:
There is no such thing as a deductible tIRA or a non deductible tIRA. There's only deductible and non deductible
contributions. If you make non deductible contributions to a tIRA, your tIRA now has a
basis.
And yes, make sure you file that Form 8606!