All High Earners Need to Know About the Mega Backdoor Roth

The mega backdoor Roth strategy lets high earners contribute far more to Roth retirement savings through a 401(k).

High earners can use a mega backdoor Roth to save beyond normal retirement contribution limits. Vyaseleva Elena/Shutterstock

If done the right way, a mega backdoor Roth can allow investors to save in a workplace retirement plan such as a 401(k) beyond the typical contribution limits.

It also can allow investors to save in a Roth account when they otherwise would not have been able to do so because of certain restrictions.

So let’s take a closer look at this complex, but potentially beneficial strategy for high earners.

What Is a Mega Backdoor Roth?

The mega backdoor Roth is a strategy that involves making after-tax contributions to a 401(k) and then making a conversion of those contributions into either a Roth IRA or Roth 401(k).

Why Use a Mega Backdoor Roth IRA?

Many people take the mega backdoor Roth approach because they can’t contribute to a Roth IRA due to income limits, or they’ve already maxed out their traditional 401(k) via salary deferrals and want to make additional contributions.

In 2026, you can’t contribute to a Roth IRA at all if your modified adjusted gross income (MAGI) is $168,000 as a single filer or $252,000 if married and filing jointly.

How Does a Mega Backdoor Roth Work?

If your plan administrator allows it, you can make after-tax contributions to your traditional 401(k) and then convert those contributions to a Roth IRA via an in-service distribution. Or, if the plan allows it, you can convert those after-tax contributions into a Roth 401(k) portion of the plan.

The key here is after-tax contributions.

After-tax 401(k) contributions are different from Roth 401(k) contributions and pretax contributions, which are associated with traditional 401(k)s.

But after-tax contributions may allow you to contribute to a workplace retirement plan like a 401(k) beyond the annual contribution limits for pretax and Roth contributions.

So let’s take a close look at these contribution limits for 2026.

You can contribute up to $24,500 in pretax and/or Roth contributions to your 401(k) if you’re under the age of 50.

Because of catch-up contributions, those aged 50 or older can contribute up to $32,500.

If your plan allows for super catch-up contributions, those between the ages of 60 and 63 can contribute up to $35,750.

But by factoring in after-tax contributions, those below age 50 may be able to save up to $72,000. Those between the ages of 50 to 59 or 64-plus can save up to $80,000. And those between the ages of 60 to 63 can save up to $83,250 if the plan allows super catch-up contributions.

But any employer contributions would count toward these limits.

Drawbacks to the Mega Backdoor Roth

Taking the mega backdoor Roth route can leave you with a hefty tax bill. This is because when you make qualified withdrawals in retirement, any investment earnings would be taxed as ordinary income.

And the earnings portion of the conversion into a Roth IRA would be subject to taxation at the time of the conversion.

In addition, your capacity to make after-tax contributions could be restricted by IRS nondiscrimination rules that affect highly compensated employees. These rules may limit how much highly compensated employees can contribute compared to non-highly compensated employees.

For 2026, you’re a highly-compensated employee if you made $160,000 or more in 2025 compensation, or if you owned more than 5 percent of the company at any time during the current or previous year.

And some plans don’t allow after-tax contributions to be eligible for employer matches.

And that brings us to one of the biggest downsides. Your plan administrator simply may not allow you to engage in the mega backdoor Roth strategy. Some employers won’t let you move money from the 401(k) and into a Roth IRA while you’re still employed by them. Or they may not allow you to transfer money from the after-tax portion of your plan into a Roth 401(k) part of the plan.

So you need to contact your plan administrator or human resources department to learn what their rules are.

The Bottom Line

Many high earners face some barriers when it comes to contributing to a Roth account. But this is when the mega backdoor Roth can come into play. This is a strategy involving making after-tax contributions to a traditional 401(k) and converting those contributions into a Roth IRA or a Roth 401(k) within the plan. But there are a few obstacles; not all companies let you take these steps within their 401(k) or other type of workplace retirement plan. There also may be some important tax implications, and the overall process could be highly complex. That’s why you need to be interested enough to brush up on your plan’s rules and take the backdoor route approach the right way. So it’s highly recommended you engage in this strategy with the guidance of a qualified tax professional.

The Epoch Times copyright © 2026. The views and opinions expressed are those of the authors. They are meant for general informational purposes only and should not be construed or interpreted as a recommendation or solicitation. The Epoch Times does not provide investment, tax, legal, financial planning, estate planning, or any other personal finance advice. The Epoch Times holds no liability for the accuracy or timeliness of the information provided.