After-Tax 401(k) Roth Conversion
A Mega Backdoor Roth is a strategy allowing high earners to move significantly more money into a Roth account than standard contribution limits allow, using after-tax 401(k) contributions converted to Roth.
It's a legal way to move up to $46,500 extra into Roth in a single year, even if your income is too high for a normal Roth IRA contribution.
Go deeper on how this actually works and how it's used.