The Backdoor Roth IRA for Physicians - A Step by Step Guide

High-earning physicians cannot contribute directly to a Roth IRA. The backdoor Roth is the workaround. Here is exactly how it works and how to do it cleanly.

Why Physicians Need the Backdoor Roth

The Roth IRA is one of the most valuable accounts in a long-term financial plan - contributions grow tax-free and qualified withdrawals in retirement are completely tax-free. But the IRS limits direct Roth IRA contributions based on income. In 2025, the ability to contribute directly phases out for single filers earning between $150,000 and $165,000, and for married filers between $236,000 and $246,000. Most attending physicians exceed these thresholds, which means direct contributions are not available.

The backdoor Roth is the legal workaround. It involves making a nondeductible contribution to a traditional IRA and then converting that amount to a Roth IRA. There is no income limit on nondeductible traditional IRA contributions, and there is no income limit on Roth conversions. The result is effectively the same as a direct Roth contribution - money in a Roth IRA growing tax-free - just accomplished in two steps instead of one.

The Step by Step Process

Step one: contribute to a traditional IRA. In 2025, the limit is $7,000 per person, or $8,000 if you are 50 or older. Make the contribution as a nondeductible contribution - meaning you do not take a tax deduction for it. This is the correct treatment since you are likely ineligible for the deduction at your income level anyway. File IRS Form 8606 with your tax return to document the nondeductible basis. This step is critical and often missed - without Form 8606, the IRS has no record that you already paid tax on this money.

Step two: convert the traditional IRA to a Roth IRA. Log into your brokerage account and initiate a Roth conversion for the full amount you just contributed. Do this promptly after the contribution - ideally within a few days - before the funds have time to earn any interest. A small amount of earnings in the traditional IRA before conversion creates a slightly taxable event that complicates the math.

Do the backdoor Roth early in January each year. Contributing and converting in the same calendar year keeps the accounting simple. Waiting until April to make a prior-year IRA contribution and then converting in the current year creates a two-year paper trail that increases the chance of an error.

The Pro-Rata Rule - The Most Important Complication

The backdoor Roth works cleanly only if you have no pre-tax money sitting in any traditional IRA. If you have a rollover IRA, a SEP-IRA, or a SIMPLE IRA with pre-tax funds, the IRS applies what is called the pro-rata rule when you do a conversion. Instead of treating your nondeductible contribution as the only money being converted, the IRS looks at all of your traditional IRA balances combined and calculates what percentage is pre-tax versus after-tax. That percentage determines how much of your conversion is taxable.

For example, if you have $93,000 in a rollover IRA from a previous employer and you make a $7,000 nondeductible contribution, your total traditional IRA balance is $100,000. Your nondeductible basis is 7 percent of the total. When you convert $7,000, only 7 percent - $490 - is tax-free. The remaining $6,510 is taxable income. The solution for most physicians in this situation is to roll the pre-tax IRA balance into a current employer 401k or 403b plan, which removes it from the pro-rata calculation and allows the backdoor Roth to work cleanly going forward.

Spousal Backdoor Roth

If you are married, your spouse can also do a backdoor Roth IRA using the same process, doubling the annual household contribution to $14,000 or $16,000 for couples over 50. Each spouse has a separate IRA and executes the contribution and conversion independently. The pro-rata rule applies separately to each spouse is own IRA balances - a clean slate for one spouse does not help the other if that spouse has pre-tax IRA funds.

Run this process annually and document it consistently. The backdoor Roth is well-established in tax law and the IRS has not challenged properly executed transactions. Working with a CPA who is familiar with the process ensures your Form 8606 is filed correctly each year and that your basis tracking remains accurate over time.