What is a Backdoor Roth IRA? Step-by-Step Guide for 2026

If you’re a high-income earner, you’ve probably already run into the frustrating reality that many of the best tax-free investment options are off-limits to you. One of the biggest culprits? The Roth IRA. 

For 2026, the IRS is holding firm on income limits that keep a lot of people out of Roth IRAs. But here’s the thing: there’s a perfectly legal, IRS-approved strategy that lets you still get your money into a Roth account, even if you make way too much to qualify. It’s called the backdoor Roth, and it’s one of the best-kept secrets for building long-term tax-free retirement income.

In this post, we’ll walk through exactly how the backdoor Roth works, step-by-step. We’ll also show you a sneaky tax rule that could completely derail your plan if you’re not careful (and how to avoid it). 

Why High-Income Earners Get Shut Out of Roth IRAs 

The Roth IRA is popular for good reason. You pay taxes on the money before it goes in, and from that point on, it can grow and be withdrawn completely tax-free, assuming you follow the rules. 

For 2026, if you’re single and your Modified Adjusted Gross Income (MAGI) is $153,000 or less, or married filing jointly and earning $242,000 or less, you can contribute the full $7,500 ($8,600 if you’re 50 or older) to a Roth IRA. But if you’re a single filer making $168,000 or more – or a married couple earning $252,000 or more – you’re locked out of making direct Roth contributions altogether. 

That’s where a backdoor Roth comes in. It’s a workaround that uses a traditional IRA as the entry point to move money into a Roth, bypassing those pesky income caps. 

How the Backdoor Roth Strategy Works 

This process really boils down to four steps: 

Step 1: Open a traditional IRA if you don’t already have one.

Step 2: Open a Roth IRA if you don’t already have one.

Step 3: Make a nondeductible contribution to the traditional IRA.

Step 4: Convert that money from your traditional IRA to your Roth IRA. 

At first glance, that seems almost too easy. But each step has a few important details you have to get right. 

Why Your Contribution Will Be Nondeductible 

If you make too much to contribute directly to a Roth IRA, you also make too much to deduct traditional IRA contributions. That means any contribution you make to your traditional IRA will be with after-tax dollars; you’ve already paid tax on this money once. The upside? You won’t owe taxes on it again when it’s withdrawn. 

This nondeductible contribution is the key to successfully completing the backdoor Roth strategy. 

Avoiding Double Taxation 

Here’s the first tax pitfall: when you make that nondeductible contribution to your traditional IRA, you must report it on IRS Form 8606. This form officially tells the IRS, “Hey, this portion of my IRA has already been taxed.” Skip this, and you risk getting taxed again on that money down the road. 

Watch Out for Gains Before Converting 

The second tax trap happens if your money grows inside the traditional IRA before you convert it to your Roth. If you contribute $7,500 and it grows to $7,700 before converting, that extra $200 is taxable at your regular income rate. 

The workaround? Convert as soon as possible after making the contribution, so there’s no time for gains to build up. This will require some pre-planning to ensure a smooth rollover, but it’s worth the effort. 

The Big One: The Aggregation Rule 

The most dangerous pitfall in the backdoor Roth process is something called the aggregation rule. This rule says the IRS looks at all of your IRA accounts combined – traditional, SEP, and SIMPLE IRAs – when calculating the taxable portion of your conversion. 

You can’t just “pick” the nondeductible dollars to convert. The IRS forces you to take a proportional amount of both pre-tax and after-tax money. Here’s an example: 

Say you have $72,000 total in your IRAs: $67,000 from past pre-tax contributions, and $5,000 from your new nondeductible contribution this year. That $5,000 is only 6.94% of your total IRA balance. So, if you try to convert “just” that $5,000, the IRS says only 6.94% ($347) is tax-free. The remaining $4,653 gets taxed at your ordinary income rate. 

That’s a nasty surprise you definitely want to avoid. 

How to Avoid the Aggregation Rule 

The easiest way to sidestep the aggregation rule is to have nothing to aggregate with. In other words, make sure you have no pre-tax money already sitting in IRAs when you do the conversion. 

If you have pre-tax IRA money now, you may be able to roll it into an employer-sponsored 401(k) before starting the backdoor Roth process. 401(k)s don’t count toward the aggregation rule. 

Is a Backdoor Roth Right for You? 

The backdoor Roth strategy can be a powerful tool for high-income earners who want tax-free growth potential in retirement. But it’s not for everyone. If you have large pre-tax IRA balances, or if you don’t plan carefully around timing and reporting, you could end up with an unexpected tax bill.

If you’re not sure whether it’s a fit for you, it’s worth talking with a financial professional who can look at your full picture, including your tax situation, and guide you through the process. 

If you’d like to learn how a backdoor Roth might work in your specific situation and to explore other strategies that seek to maximize your retirement income, click here to reach out and schedule a free review. We’ll help you see exactly how to take advantage of this strategy while avoiding costly mistakes.

Contributions to a traditional IRA may be tax deductible in the contribution year, with current income tax due at withdrawal. Withdrawals prior to age 59 ½ may result in a 10% IRS penalty tax in addition to current income tax.

A Roth IRA conversion—sometimes called a backdoor Roth strategy—is a way to contribute to a Roth IRA when income exceeds standard limits. The converted amount is treated as taxable income and may affect your tax bracket. Federal, state, and local taxes may apply. If you’re required to take a minimum distribution in the year of conversion, it must be completed before converting.

To qualify for tax-free withdrawals, you must generally be age 59½ and hold the converted funds in the Roth IRA for at least five years. Each conversion has its own five-year period, and early withdrawals may be subject to a 10% penalty unless an exception applies. Income limits still apply for future direct Roth IRA contributions.

This material is for informational purposes only and does not constitute tax, legal, or investment advice. Please consult a qualified tax professional regarding your individual circumstances.