The Backdoor Roth IRA for Physicians: The 2026 Walkthrough and the Pro-Rata Trap

Why the backdoor exists

Congress limits direct Roth IRA contributions by income but, since 2010, places no income limit on converting a traditional IRA to a Roth IRA. Anyone can make a non-deductible contribution to a traditional IRA regardless of income. Put the two rules together and a high earner can contribute to a traditional IRA, convert it to Roth, and end up with the same result as a direct Roth contribution. The strategy is widely used, reported on a dedicated tax form, and was explicitly acknowledged in Congressional records when the rules were written.

The steps

1. Confirm you have no pre-tax balances in any traditional, SEP, or SIMPLE IRA. If you do, see the pro-rata section before proceeding.
2. Open a traditional IRA and a Roth IRA at the same custodian if you do not already have them.
3. Contribute up to $7,500 for 2026 to the traditional IRA as a non-deductible contribution. Leave it in cash.
4. Convert the traditional IRA balance to the Roth IRA. Most custodians process this online in a day or two. There is no required waiting period.
5. Invest the money inside the Roth IRA.
6. File Form 8606 with your tax return to report the non-deductible contribution and the conversion. If a spouse does the same, the spouse files a separate Form 8606.

Done correctly, the conversion produces little or no taxable income, because the contribution was made with after-tax dollars and the money was not invested long enough to grow before conversion.

The pro-rata rule

When you convert, the IRS does not let you choose which dollars you are converting. It treats all of your traditional, SEP, and SIMPLE IRA balances as one pool and taxes the conversion in proportion to the pre-tax share of that pool, measured on December 31 of the conversion year. A physician with $92,500 of pre-tax money in an old rollover IRA who converts a $7,500 non-deductible contribution has a pool that is 92.5 percent pre-tax, so 92.5 percent of the conversion, about $6,900, is taxable. The backdoor still works, but it stops being free.

The fix is to move pre-tax IRA balances out of the IRA system before December 31. Most employer plans, including hospital 403(b) and 401(k) plans, accept roll-ins of pre-tax IRA money. Once the IRA balances are zero at year-end, the conversion is clean. Roth IRA balances do not count toward the rule.

Moonlighting income and the SEP trap

Physicians who moonlight often open a SEP-IRA for the 1099 income because it is simple. A SEP-IRA is a traditional IRA for pro-rata purposes, and every dollar in it dilutes the backdoor. A Solo 401(k) offers the same or higher contribution room for self-employment income and does not count toward the rule. If you plan to use the Backdoor Roth, choose the Solo 401(k).

The mega backdoor

Some employer plans allow after-tax contributions beyond the $24,500 employee deferral limit and permit in-plan Roth conversions or in-service rollovers of those after-tax dollars to a Roth IRA. Where available, this mega backdoor Roth can add tens of thousands of dollars of Roth space per year. Read the plan document or ask the plan administrator specifically about after-tax contributions and in-plan conversion.

Mistakes to avoid

• Converting with pre-tax IRA balances outstanding and receiving a surprise tax bill.
• Forgetting Form 8606, which can cause the conversion to be taxed as if the contribution were pre-tax.
• Deducting the traditional IRA contribution, then converting it.
• Opening a SEP-IRA for moonlighting income.
• Skipping the spouse. Each spouse can do a Backdoor Roth, including a spouse with no earned income, based on the working spouse’s income.