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

Once attending income exceeds the Roth IRA income limits, direct contributions are no longer available. The backdoor Roth IRA solves this -- but only if executed correctly.

Why Physicians Cannot Contribute Directly to a Roth IRA

The Roth IRA is one of the most powerful accounts in the tax code: contributions are made with after-tax dollars, growth is completely tax-free, and qualified withdrawals in retirement are also tax-free. There are no required minimum distributions during the lifetime of the account owner. For a physician who builds a significant Roth balance over a career, the tax-free compounding over 30 years is transformative.

The problem is income limits. In 2024, direct Roth IRA contributions phase out for single filers above $146,000 and are eliminated entirely above $161,000. For married filers, the phase-out begins at $230,000. Most physicians exceed these thresholds in their first year of attending practice -- which means direct Roth IRA contributions are unavailable for most of a physician career.

The backdoor Roth IRA is the solution. It is a legal, IRS-sanctioned two-step process that achieves the same outcome as a direct Roth contribution regardless of income level.

How the Backdoor Roth Works

Step 1: Contribute to a Traditional IRA. There is no income limit for Traditional IRA contributions -- only for the deductibility of those contributions. A physician earning $400,000 can contribute $7,000 (2024 limit, $8,000 if age 50 or older) to a Traditional IRA. At attending income levels, this contribution is non-deductible -- there is no upfront tax benefit. The contribution is made with after-tax dollars and the basis is recorded on IRS Form 8606.

Step 2: Convert the Traditional IRA to a Roth IRA. After the contribution is made, the balance is converted to a Roth IRA. Because the contribution was non-deductible (after-tax), the conversion is tax-free -- assuming no earnings have accumulated between contribution and conversion. The funds are now in a Roth IRA and will grow and be withdrawn completely tax-free.

Execute both steps in the same tax year. Contribute as early in January as possible and convert promptly to minimize the earnings that accumulate between contribution and conversion. A small amount of earnings on the contribution before conversion is taxable -- minimizing the gap minimizes the tax.

The Pro-Rata Rule: The Step That Trips Physicians Up

The backdoor Roth is clean and simple when executed correctly. It becomes complicated -- and potentially expensive -- when a physician has pre-tax money sitting in a Traditional IRA.

The IRS does not allow a taxpayer to convert only the after-tax portion of a Traditional IRA. Instead, all Traditional IRA balances are treated proportionally. If a physician has $100,000 in a pre-tax rollover IRA from a previous employer and contributes $7,000 in non-deductible after-tax dollars, the total Traditional IRA balance is $107,000. The after-tax portion is $7,000 divided by $107,000, which equals approximately 6.5%. When converting $7,000 to Roth, only 6.5% of that conversion is tax-free -- the remaining 93.5% is taxable at ordinary income rates.

For a physician in the 37% bracket, this turns a tax-free strategy into a significant unexpected tax bill. The solution is straightforward: eliminate all pre-tax Traditional IRA balances before executing the backdoor Roth. Rollover IRA balances from previous employers can typically be rolled into the current employer 401(k) or 403(b), if the plan accepts rollovers. Once the pre-tax IRA balance is zero, the backdoor Roth proceeds cleanly.

The pro-rata rule is the most common and most expensive backdoor Roth mistake. Check for pre-tax IRA balances before the first contribution. Eliminate them before converting.

Step-by-Step Execution at Fidelity, Vanguard, or Schwab

Step 1: Open a Traditional IRA if one does not already exist. There is no minimum balance required.

Step 2: Make a non-deductible contribution of $7,000 (or $8,000 if age 50 or older). The brokerage will ask whether the contribution is deductible or non-deductible -- select non-deductible.

Step 3: Leave the contribution in cash or a money market fund -- do not invest it. Invested funds generate earnings that complicate the conversion.

Step 4: Convert the Traditional IRA balance to the Roth IRA. This is typically done through the brokerage interface under "Convert to Roth" or "Roth conversion." Select the full balance.

Step 5: File IRS Form 8606 with the annual tax return. This form records the non-deductible basis and confirms the conversion was tax-free. Do not skip this step -- it is the documentation that protects the tax-free status of the conversion.

The Married Couple Version

Both spouses can execute the backdoor Roth independently, even if one spouse has no earned income, as long as the couple files jointly and has sufficient combined earned income. A married physician couple can contribute $14,000 per year ($7,000 each) to Roth IRAs through the backdoor process -- $280,000 over 20 years in contributions alone, plus decades of tax-free compounding on top of that.

Why Roth Assets Are Especially Valuable for Physicians

Roth withdrawals in retirement do not count as income for Medicare IRMAA surcharge calculations, which can add $1,000 to $6,000 per person annually to Medicare costs for high-income retirees. They do not affect the taxation of Social Security benefits. And they are not subject to required minimum distributions, which begin at age 73 for pre-tax accounts and can create taxable income the physician does not need or want.

A physician who executes the backdoor Roth every year from age 32 to 62 contributes $210,000 over 30 years. At a 7% average return, that account grows to approximately $660,000 -- completely tax-free, with no RMDs, invisible to Medicare surcharge calculations. Execute it every year. The cost is about 20 minutes of annual effort.