There's a retirement savings trick that lets you stash up to $46,000 extra into a tax-free account each year, and most Americans have never heard of it.
It's called the mega backdoor Roth, and it's perfectly legal.
It's also out of reach for a huge chunk of workers, which is exactly why it stays under the radar.
A normal 401(k) lets you contribute $23,000 in 2024, plus a catch-up if you're 50 or older.
But your employer can also allow something called after-tax contributions on top of that, pushing your total annual additions toward $69,000.
The mega backdoor Roth is the maneuver that converts those after-tax dollars into Roth money, where growth and withdrawals can eventually be tax-free.
The catch is buried in your plan documents.
Your employer has to offer after-tax contributions, and many simply don't.
Even when they do, the plan must permit either an in-service conversion or automatic rollovers to a Roth account.
If your HR department shrugs when you ask, you're likely out of luck.
Mostly higher earners at large companies with generous benefits teams, often in tech, finance, and consulting.
If you're maxing out your regular 401(k) and still have thousands left over each month, this is a legitimate way to shelter more.
If you're paycheck to paycheck, it might as well be a rumor.
The people promoting this strategy online tend to be the same folks selling wealth management services, which is worth remembering.
After-tax contributions don't get the upfront tax break, so your take-home pay shrinks now.
Conversions can trigger paperwork headaches and, in some cases, taxable earnings if you delay.
And if you leave your job, the rules for moving that money can get messy.
Anyone pitching this as a simple hack is glossing over the fine print.
The bigger picture is that retirement tax breaks increasingly reward people who already have money.
The mega backdoor Roth is legal, but it's a symptom of a system where the best perks hide in plan documents nobody reads.
Before chasing it, check whether your plan even allows it, and run the numbers with a fee-only advisor who isn't earning a commission on your decision.
Our take: this is a legitimate tool, not a scam, but it's also not the life-changing secret the internet makes it out to be.
If you qualify, it's worth a conversation.
Final Thoughts
If you don't, don't lose sleep over a loophole your employer never offered you in the first place.