Doctors Earning $400K Are Quietly Funneling $70,000 a Year Into a Roth the IRS Says They Can’t Have

A physician pulling $400,000 a year sits well above the Roth IRA contribution income limit. The IRS closes the front door. It leaves the side and back doors wide open, and a growing number of doctors are walking through both to move roughly $70,000 a year into Roth accounts the direct rules would forbid.

Here is how the play works, why the employment setup matters, and where the pro-rata trap eats the strategy alive.

Why the Front Door Is Closed

Direct Roth IRA contributions phase out once modified adjusted gross income crosses IRS thresholds that reset each year (verify the current-year phase-out at IRS.gov). A single physician earning $400,000 is far above the cutoff. So is most married-filing-jointly attending income once both spouses work.

The tax stakes are real. In tax year 2026, single filers hit the 32% bracket at $201,775 and the 35% bracket at $256,225. A $400K single-filing doctor is squarely in 35% territory. Every dollar that grows tax-free in a Roth is a dollar that avoids decades of drag at those rates in retirement.

Door One: The Backdoor Roth IRA

The mechanic is boring and legal. As Suze Orman puts it, “You simply open up a non-deductible IRA, you do not take it off your taxes, and you convert it to a Roth IRA, because you can convert any amount of money you want and there are no income limitations on conversion.” Clark Howard describes the same maneuver: “People can do a non-deductible IRA, and if you jump through the right hoops, you can then virtually immediately convert it into a Roth IRA.”

That gets a physician the annual IRA contribution amount into Roth. Useful, but small. The real money is behind door two.

Door Two: The Mega Backdoor Roth (Where the $70K Comes From)

The IRS caps employee elective deferrals to a 401(k) at one number and caps total annual additions (employee + employer + after-tax) at a much bigger one, roughly the $70,000 range in recent years (verify the 2026 415(c) limit at IRS.gov). The gap between those two caps is the mega backdoor.

The sequence for a hospital-employed physician whose plan allows it:

1. Max the pre-tax or Roth 401(k) elective deferral.
2. Count employer match toward the total 415(c) limit.
3. Fill the remaining space with after-tax (non-Roth) 401(k) contributions.
4. Immediately convert those after-tax dollars via in-plan Roth conversion or in-service rollover to a Roth IRA.

Stack the backdoor Roth IRA on top and the total funneled into Roth accounts lands near the headline figure. The IRS blocked the direct Roth contribution; it did not block this.

The Employment Split Changes the Playbook

W-2 hospitalist or academic physician: The mega backdoor only works if the employer’s 401(k) or 403(b) allows after-tax contributions and in-service conversions. Many academic 403(b) plans do not. Read the summary plan description. If both features exist, a 403(b) plus a governmental 457(b) can stack elective deferrals across two plans, a quirk unique to hospital and university systems.

1099 locum, moonlighter, or practice owner: A Solo 401(k) from a provider that permits after-tax contributions and in-plan Roth conversions replicates the mega backdoor for self-employed income. Employer profit-sharing is set by the physician-owner, so the full 415(c) space is controllable. This is the cleanest path, and most brokerage default Solo 401(k) plans do not allow it. A custom plan document is usually required.

The Pro-Rata Trap That Sinks Doctors

The IRS applies a pro-rata rule to Roth conversions from IRAs. A physician with a large rollover IRA from a residency-era 401(k) will find that a “backdoor” conversion is taxed proportionally across pre-tax and after-tax balances, not just on the new $7,000 non-deductible contribution.

The fix, when a current employer plan accepts incoming rollovers, is to roll pre-tax IRA balances into the 401(k) or 403(b) before December 31 of the conversion year. That empties the IRA side of the pro-rata calculation. Suze Orman notes the same logic for anyone protecting a backdoor Roth: “You would be better off to just simply roll your traditional 401(k) from your former employer into your new employer’s 401(k) plan.”

What to Verify Before Executing

• The current-year Roth IRA phase-out, 401(k) elective deferral limit, and 415(c) total additions limit at IRS.gov.
• Whether the employer plan document permits after-tax contributions and in-service conversions.
• Any IRA balances that would trigger pro-rata taxation on conversion.
• State tax treatment of Roth conversions.

A CPA or fiduciary advisor familiar with physician compensation should sign off before a doctor moves five figures through this structure.

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