How a mega backdoor Roth works
The mega backdoor Roth allows you to put up to $37,500 in a Roth IRA or Roth 401(k) in 2020, on top of the regular contribution limits for those accounts. If you have a Roth 401(k) at work (and the plan allows for the mega option as described below), generally you can choose whether the final destination of your mega contributions is the Roth 401(k) or a Roth IRA. If your employer offers only a traditional 401(k), then your mega contributions would end up in a Roth IRA.
Here’s a quick summary of what you need to have in place for the ideal mega backdoor Roth strategy:
- A 401(k) plan that allows “after-tax contributions.” After-tax contributions are a separate bucket of money from your traditional and Roth 401(k) contributions. About 43% of 401(k) plans allow after-tax contributions, according to a 2017 survey of large and midsize employers by consulting firm Willis Towers Watson.
- Your employer offers either in-service distributions to a Roth IRA — that is, you can take money out of the 401(k) plan while you’re still working at the company — or lets you move money from the after-tax portion of your plan into the Roth 401(k) part of the plan. If you’re not sure, ask your human resources department or plan administrator.
- You’ve got money left over to save, even after maxing out your regular 401(k) and Roth IRA contributions. In 2020, that means being able to save more than $25,500 (that’s $19,500 to a 401(k) plus $6,000 to a Roth IRA), or more than $33,000 if you’re 50 or older ($26,000 to a 401(k) and $7,000 to a Roth).
