What Is a Backdoor Roth IRA and Should You Do One?

If your income is above a certain threshold, the IRS won't let you contribute directly to a Roth IRA. For 2026, that phase-out starts at $153,000 for single filers and cuts off completely at $168,000. If you're married filing jointly, the range is $242,000 to $252,000.

A lot of high earners hear this and assume the Roth door is permanently closed. It's not. There's a legal workaround called the backdoor Roth IRA, and it's been used for years by people in exactly your situation.

Here's what it is, how it works, and when you need to be careful before doing it.

What Is a Backdoor Roth IRA?

The backdoor Roth is a two-step process. First, you make a nondeductible contribution to a traditional IRA. Then you convert that traditional IRA to a Roth IRA. The end result: money sitting in a Roth IRA growing tax-free, even though your income was above the limit.

Congress has known about this for years and has explicitly chosen not to close it. It's legal. It's widely used. It's not a loophole in any shady sense of the word.

The 2026 contribution limit for IRAs is $7,500 ($8,600 if you're 50 or older). That's the max you can put in per year using this strategy.

Step-by-Step: How to Actually Do It

This doesn't require anything exotic. Most major brokerages (Fidelity, Vanguard, Schwab) make the process pretty clean.

• Step 1: Contribute to a traditional IRA. Open a traditional IRA if you don't have one. Make a nondeductible contribution up to the $7,500 limit. Because your income is above the phase-out, you're not getting a tax deduction on this contribution. That's fine. You're tracking it on IRS Form 8606, which tells the IRS this was already after-tax money.
• Step 2: Convert to Roth. Once the contribution settles (usually a day or two), convert the traditional IRA to your Roth IRA. If you do this quickly, before the money earns anything, there's little to no taxable gain. The conversion itself is not a taxable event for the principal, since you already paid taxes on it.
• Step 3: File Form 8606. Your tax preparer or software handles this. It documents the nondeductible contribution so you're not taxed on it again down the road.

Do this before the tax filing deadline (April 15) for the prior year if you want it to count for a previous tax year.

The Pro-Rata Rule: Why You Might Want to Wait

Here's where things get complicated, and where a lot of people get tripped up.

If you have other pre-tax money sitting in a traditional IRA anywhere, the IRS doesn't let you just convert the clean after-tax contribution cleanly. It looks at all your IRA money combined and applies a pro-rata calculation.

Say you have $93,000 in a pre-tax rollover IRA from an old job, and you just added $7,500 in nondeductible contributions. Your total IRA balance is $100,500. Only about 7.5% of that total is after-tax. So when you convert $7,500, only 7.5% of it ($562) comes out tax-free. The other 92.5% ($6,938) is taxable at your ordinary income rate.

That's the opposite of what you were going for.

This doesn't mean the strategy is dead if you have pre-tax IRAs. But it means you need to think about it. One common solution: if your current employer's 401(k) plan accepts rollovers, you can roll your pre-tax IRA money into the 401(k) first, clearing out the pre-tax IRA balance. Then do the backdoor Roth on a clean slate.

Not all 401(k) plans allow this. Check with your HR or plan administrator before assuming it's an option.

Who Should Do a Backdoor Roth?

The backdoor Roth makes the most sense if you're in a few specific situations:

• Your income is above the phase-out and you want Roth exposure in retirement
• You don't have pre-tax IRA money that would complicate the pro-rata calculation, or you can roll it into a 401(k) first
• You're already maxing your 401(k) and want another tax-advantaged bucket
• You believe your tax rate in retirement will be similar to or higher than it is today

If you're in the $150,000 to $168,000 range and phasing out, double-check whether a direct Roth IRA contribution is still partially available to you. The phase-out is a gradual reduction, not a cliff. You might be able to contribute something directly before needing to go the backdoor route.

Who Should Be More Careful

If you have a large rollover IRA from old jobs and your current 401(k) won't accept incoming rollovers, the backdoor Roth becomes less efficient due to the pro-rata rule. It's not necessarily a reason to skip it, but you'd want to model out the tax cost before pulling the trigger.

Also worth saying: if you're in a very high bracket right now, adding ordinary income (even a small conversion amount) has real cost. It's usually still worth it for $7,500 given the long-term Roth benefits, but the calculus changes if you're looking at a larger conversion amount.

The backdoor Roth is not complicated once you understand what you're doing. The pro-rata rule is the main thing that catches people. If you're unsure where you stand, it's worth running the numbers with a fee-only advisor before contributing.

For more on how Roth and traditional accounts compare in general, see Roth IRA vs. 401(k): How to Choose. And if you're thinking about whether a conversion makes sense in a low-income year, read When Should You Do a Roth Conversion?

Frequently Asked Questions

Is the backdoor Roth IRA legal?

Yes. It's been available since 2010 and Congress has explicitly declined to close it. The IRS is aware of it, it's documented on Form 8606, and there is nothing improper about using it. That said, do it correctly and document it, which any competent tax preparer can help you with.

Can I do a backdoor Roth if I have a 401(k) at work?

Yes, the two are separate. Having a 401(k) doesn't affect your ability to do a backdoor Roth. The only thing that creates a problem is pre-tax IRA money due to the pro-rata rule. Your 401(k) is a different type of account and doesn't factor into the calculation.

What happens if I contribute to a Roth IRA directly and my income ends up over the limit?

The IRS calls this an excess contribution. You'll owe a 6% penalty on the excess for every year it stays in the account. The fix is to recharacterize the contribution to a traditional IRA (which your brokerage can do), then convert it to Roth. Many brokerages allow this before the tax deadline. Act quickly if you realize the mistake.

Do I have to convert immediately after contributing?

No, but most people do it quickly to avoid the money earning gains in the traditional IRA before conversion. If it earns $20 in interest before you convert, that $20 is taxable. It's a small amount, but converting promptly keeps things clean and simple.

What is the 2026 income limit for a Roth IRA?

For single filers, the phase-out begins at $153,000 and ends at $168,000. For married filing jointly, it's $242,000 to $252,000. Above those limits, you can't contribute directly, which is where the backdoor Roth comes in.

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Disclosure: This article is for educational purposes only and does not constitute personalized investment, tax, or legal advice. Individual situations vary. Please consult a qualified financial professional before making financial decisions. Villaire Financial, LLC is a registered investment adviser. Schedule a free intro call if you'd like to talk through your specific situation.