If you earn too much to fund a Roth IRA directly, the backdoor Roth has been the go-to workaround for years.
You put money into a traditional IRA, convert it to a Roth, and pay tax only on the gains.
The catch sits in a rule that's been on the books since 2014 but is finally getting more attention: the once-per-year limit on indirect IRA rollovers.
Mess up the timing, and you can trigger taxes and penalties you never saw coming.
You're allowed one indirect rollover — meaning money leaves your IRA and lands back in another within 60 days — per 12-month period across all your IRAs.
That includes Roth conversions if you take a distribution first and redeposit it yourself.
Do a second one too soon and the IRS treats the extra as a taxable distribution.
Most people avoid this by doing a direct trustee-to-trustee transfer, where the money never touches your hands.
That's the safest path and the one financial planners recommend.
But a surprising number of people still write themselves a check and assume they can do it again a few months later.
There's another wrinkle that trips up high earners.
If you have any pre-tax money sitting in a traditional IRA — from an old 401(k) rollover, say — the IRS uses a pro-rata formula to figure out how much of your conversion is taxable.
That means you could owe tax on a chunk of your backdoor Roth even though you thought you were converting after-tax dollars.
The fix is to move pre-tax IRA money into your current employer's 401(k) before doing the conversion, if your plan allows it.
Not every plan does, and that's where people get stuck.
The conversion gets reported on Form 8606, and the IRS wants to see it every year you make a nondeductible contribution or do a conversion.
Skip it, and you may get a letter months later asking why your basis doesn't match.
None of this makes the backdoor Roth a bad move.
For many high earners, it's still one of the few ways to get tax-free growth in retirement.
But the "backdoor" label makes it sound simpler than it is.
If you're not sure whether you have pre-tax IRA money, check your statements before you convert.
And if you've already done an indirect rollover this year, don't do another one until the 12 months pass.
A five-minute call to your custodian can save you a tax bill that runs into the thousands.
The rules aren't new, but the penalties for ignoring them are real.
Final Thoughts
Treat the backdoor Roth like what it is — a strategy that rewards attention to detail, not a set-it-and-forget-it account.