How to Do a Backdoor Roth IRA (Even If You ‘Make Too Much’)

The Roth IRA is the rare financial product that delivers exactly what it promises: pay tax on the way in, never again on the way out. The catch is that high earners aren't allowed to contribute directly. The backdoor Roth IRA is the well-trodden workaround — and despite the name, it's completely legal, completely ordinary, and completely misunderstood.

Why the backdoor exists

Roth IRA contributions have income limits — phase-outs that shut the door entirely once you're solidly in the upper brackets. But the law has no income limit on converting a traditional IRA to a Roth. So the strategy is simple: contribute to a traditional IRA (no income limit on contributions, just no deduction if you're covered by a workplace plan), then convert that balance to a Roth.

The step-by-step

Step one: open a traditional IRA if you don't already have one. Step two: contribute up to the annual IRA limit. Step three: convert the balance to a Roth IRA — most brokers have a button for this. Step four: report the non-deductible contribution and the conversion on Form 8606 with your taxes. That last step is the one everyone forgets, and it's the one that keeps the IRS from taxing your conversion twice.

Timing note: the conversion can happen days after the contribution, but the contribution itself must be made by the tax filing deadline to count for that year. The longer the money sits in the traditional IRA, the more growth you'll owe tax on at conversion — so the backdoor part works best when done quickly.

The pro-rata rule: the trap in the room

Here's where the strategy dies for a lot of people. The IRS doesn't let you convert only your non-deductible dollars. If you have other traditional IRA balances — from old rollovers or deductible contributions — the conversion is taxed proportionally. That's the pro-rata rule, and it can turn a clean backdoor into an unexpected tax bill.

The usual fix is to roll pre-tax IRA money into a workplace 401(k) before converting, if your plan allows it. That clears the traditional IRA of pre-tax balances and restores the clean backdoor. It's a chore, but it's a chore with a tax-free retirement account at the end of it.

When to think twice

The backdoor makes sense when you're above the Roth income limits and you've already maxed your other tax-advantaged space. It makes less sense if you're retired, if you expect to need the money soon (conversions can't be undone), or if you're in a year where the pro-rata rule would sting. It also depends on the law staying where it is — Congress has discussed closing the backdoor for years, and one day it might. Max it while it's open, and keep your Form 8606 records forever.

Is the backdoor Roth right for you? If you're a high earner with no traditional IRA balances and a long runway to retirement, it's hard to argue against. Run the numbers with your tax software or a professional — then enjoy the rare experience of a loophole that works in your favor.