Backdoor Roth IRA: How High Earners Fund a Roth in 2026

A backdoor Roth IRA is an indirect way for high earners to get around the income limits on contributing to a Roth IRA directly, by first contributing to a non-deductible (traditional) IRA with no income limit, then converting the funds in that account to a Roth. Although there is a legal work-around of using this method as an alternative to direct contributions, because your existing pre-tax IRA dollars may be subject to the "pro rata" rule when you do your conversion, there can be tax consequences.

That last sentence is the entire problem. Whether this costs you almost nothing (depending on how much money you have in your Traditional, SEP and Simple IRAs) or will cost you actual taxes is entirely determined by the size of those retirement accounts.

What is a backdoor Roth IRA?

A backdoor Roth IRA is not an account you open. It's two regular transactions, a nondeductible contribution to a Traditional IRA (everyone can put money in one) and then a conversion of that account to a Roth. The reason this works is because the income limit applies to deductibility, not to contributions. Because there have been no income limits for conversions since 2010, this means if your income level would normally bar you from contributing to a Roth Directly (like some people with higher incomes), now you can use these two steps and still get that money into a Roth. The 2026 limit will be $7,500, the ceiling on all IRAs. If you're age 50 or over, then when you make that first contribution you'll also have access to a $1,100 catch-up.^[1] This isn't really an "account" type of strategy, it's simply two very specific types of transactions done in order. So while many people use it and it does work within the rules of tax law, everything about it depends upon how much tax is owed during those two steps.

Who actually needs the backdoor?

You only need the backdoor if your income shuts down the front door. There is a MAGI (modified adjusted gross income) band for direct contributions to Roth IRAs, and once you exceed this band's high end you are not able to make a single dollar contribution to a Roth IRA using the direct method.^[1] Below the band, simply skip the backdoor and contribute directly into a Roth. These are the 2026 thresholds at which the front door is closed for direct contributions:

You have to make sure that as a self-employed owner you really do cross that line first, because the self-employed IRA contribution limits and deductions can pull your MAGI back under it during a lean year.

How do you do a backdoor Roth IRA?

There are three steps to process the mechanics of this, and the order matters because the tax report is based on it:

1. Contribute to a nondeductible traditional IRA

   You may contribute as much as $7,500 per year (or $8,600 at age 50 and over) to a traditional IRA and do not deduct it. Since you are taking no deduction for this contribution, income limits are not a factor here. Therefore, you will have an after-tax basis in the account of that amount.

2. Convert the traditional IRA to a Roth

   Convert your money to a Roth Individual Retirement Account (IRA). There are no income limits in converting to a Roth IRA. However, if you convert from a traditional IRA to a Roth IRA, any earnings prior to the conversion date will be taxable. As such, many people convert as soon as they have contributed funds into an account.^[2]

3. Report both on Form 8606

   File Form 8606 with your return. Part I of this form shows the nondeductible contribution and your basis. Part II of this form reports the conversion. Without sending this information to the IRS, there will be no record that you've already paid taxes on the nondeductible contribution you made to your traditional IRA (which may subject you to double taxation).^[3]

The custodian sends a Form 1099-R for the distribution on the traditional side, and then this Form 8606 reconciles it against the basis you create, so the two have to be consistent.

What is the pro-rata rule, and why does it matter?

The pro-rata rule taxes your conversion across every pre-tax IRA dollar you have, and it is not limited to the after-tax dollars in each account. Many people believe that if they made a post-tax contribution (e.g., $7,500), that was the only money that converted tax-free. They are incorrect. Under Internal Revenue Code section 408(d)(2) the IRS uses an "all-in-one" approach for conversions from your traditional, SEP or SIMPLE IRAs as of December 31. It combines all of those accounts into one big pool of money and then taxes every conversion based on how much of that pool comes from after-tax contributions versus how much comes from before-tax contributions.^[4] Let's say you make a $6,000 nondeductible contribution, but also have a $54,000 pre-tax rollover IRA. Your combined balance is now $60,000 and only $6,000 of that balance represents after tax contributions which represent a 10 percent portion of your total balance, therefore when you perform a $6,000 conversion your funds split as follows:

You may be left with some "leftover" basis that does not vanish but remains on your Form 8606 and continues to follow you into subsequent conversions, however, you are going to receive a tax bill for this year's conversion. The timing of your conversion does not rescue you. The rules use your December 31 balance (the figure on line 6 of Form 8606) as the reference point to determine your pre-tax total, not the day you convert.^[6] Therefore, converting in January won't help you avoid having a balance at the end of December, and if you want a clean backdoor, you'll need to have little to no pre-tax IRA funds remaining at year end. You can check your pro-rata split first.

How does a SIMPLE IRA balance change the math?

The pro rata calculation sweeps SEP and SIMPLE IRA accounts in with your traditional IRAs, therefore, you cannot just disregard a funded SIMPLE IRA versus a traditional IRA plan as if it were a separate account. Using the example of an $80,000 SIMPLE IRA which has pre-tax deferrals and match in the denominator, that means a $7,500 nondeductible contribution against an $87,500 combined balance converts at roughly 9 percent basis, so approximately 91 percent is taxable. When looking at potential ways to do a backdoor Roth conversion, owners weighing a SEP IRA against a SIMPLE IRA will be able to see that both drag on the backdoor the same way, because both live in IRAs the rule aggregates. However, an employer sponsored 401(k) plan does not, because there is no aggregation or inclusion of it within these rules.

One way out of this is to roll your pre-tax IRA into a 401(k) that will accept rollovers which will get rid of the IRA side. Not always open on all doors: for example, you cannot roll a SIMPLE IRA into any 401(k) during the first 2 years. So the fix will be closed off for exactly those small business owners covered in this section. But rollover restrictions do have some lift when the 2 year clock runs down, and if your company has a designated Roth option, then you can compare the backdoor with a Roth SIMPLE IRA, which has no income limitations whatsoever.

Is the backdoor Roth legal?

Yes. The concern is the application of the step-transaction doctrine. In other words, will the IRS be able to combine both steps into a single disallowed direct Roth contribution? The fear appears to have dissipated since the IRS has not objected to the general order of events. Nondeductible contributions and conversions are described with respect to taxation in Publication 590-A and Publication 590-B, and they do so without treating the pairing as abusive.^[5] There is one item that you must complete for reporting purposes: you must report it on Form 8606. In addition, if you missed a past year, file a stand-alone Form 8606 for such prior tax year (without amending the entire return) so that your basis can be reflected again in the records of the Service. Late filing or non-filing may result in imposition of a $50 penalty under Internal Revenue Code section 6693. However, reasonable cause may result in abatement of such penalty.^[7]

The Bottom Line

A backdoor Roth IRA allows those who are over the 2026 income limits ($168,000 single, $252,000 joint) to create a Roth account by converting their non-deductible traditional IRA. Then there is the "pro rata" rule: All of your balances in all of your Traditional, SEP and SIMPLE IRAs are combined and if you have a large amount of money in these accounts when you make this conversion, the conversion will be taxable as ordinary income. Make sure you do not have any money in any of your other Pre-Tax IRA accounts prior to doing this and File Form 8606.

This guide is educational and summarizes IRS rules for IRAs and Roth IRA conversions. It is not investment, legal, or tax advice. Your account documents and current IRS limits control. Talk to your tax advisor about your circumstances.