Roth Conversion for CRNAs: 2026 Strategy

A Roth conversion for nurse anesthetists involves considerations specific to CRNA income patterns, because a CRNA sits above the direct Roth IRA income limit yet earns in bursts that swing between W-2 staff contracts, 1099 assignments, and locum stretches. That volatility, plus the SEP-IRA most 1099 CRNAs get handed, is a key factor in whether a conversion may be favorable in a given year, and outcomes depend on your specific facts.

Roth conversion for nurse anesthetists: why your income pattern changes the math

Two things about CRNA pay change the calculation. First, the money. Nurse anesthetists are among the higher-paid advanced-practice nurses (median wage about $212,650 in May 2023; Source: U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics), which pushes almost every full-time CRNA past the 2026 Roth IRA phase-out of $153,000 to $168,000 single and $242,000 to $252,000 married filing jointly (Source: IRS Notice 2025-67). Direct Roth contributions are off the table.

Second, the shape of the income. A staff CRNA on a stable W-2 salary has a flat tax picture. A 1099 or locum CRNA sees income spike during heavy contract years and drop during school, licensing gaps, or a voluntary slowdown. A Roth conversion has no income cap, is taxed as ordinary income in the year you do it, must be completed by December 31, and is irreversible after 2017 (Source: IRS Roth conversion guidance; Tax Cuts and Jobs Act, Pub. L. 115-97, section 13611). Those rules make the low-income years the opportunity.

Backdoor Roth for CRNAs vs. Roth conversion vs. mega backdoor Roth

Most CRNAs conflate three separate moves. A backdoor Roth is a two-step workaround for high earners: contribute to a nondeductible traditional IRA, then convert it to Roth. A Roth conversion is the broader act of moving any pre-tax IRA or 401(k) money to Roth and paying tax now. A mega backdoor Roth is an entirely different lever inside a 401(k) that uses after-tax employee contributions.

• Backdoor Roth: lets a phased-out CRNA still fund a Roth IRA (2026 IRA limit $7,500, or $8,600 at age 50+; Source: IRS Notice 2025-67).
• Roth conversion: targets existing pre-tax balances, sized to a tax bracket, often over several years.
• Mega backdoor Roth: available only inside a plan that allows after-tax contributions and in-plan Roth conversions, such as a properly documented Solo 401(k).

High-income Roth conversion strategy: why CRNAs lose the direct Roth IRA

The direct Roth IRA closes above the 2026 phase-out ($153,000 to $168,000 single; $242,000 to $252,000 married filing jointly; Source: IRS Notice 2025-67). A full-time CRNA usually clears the top of that range, so the direct contribution is disallowed. The workarounds, the backdoor Roth and multi-year conversions, exist precisely because Congress placed an income ceiling on contributions but none on conversions.

That distinction is why a high-income Roth conversion strategy for a CRNA is not one transaction. It is a plan that decides how many dollars to move each year and which year to move them. Our page on how much to convert to Roth walks through the bracket-filling logic in detail.

Does your SEP-IRA break the pro-rata rule on a backdoor Roth?

Yes, and this is the trap that is easy to miss. The pro-rata rule aggregates the December 31 balance of every traditional, SEP, and SIMPLE IRA you own and treats them as one pool. A SEP-IRA (the account most 1099 and locum CRNAs are handed first) counts in that pool, so a “tax-free” backdoor Roth becomes partly taxable in proportion to your pre-tax balance.

Example: you make a $7,500 nondeductible contribution but hold $92,500 of pre-tax money in a SEP-IRA. Your combined IRA pool is $100,000, only 7.5% of it is basis, so converting $7,500 makes about 92.5% of the conversion taxable. The nondeductible contribution did almost nothing. The mechanics and the Form 8606 math are covered on our pro-rata rule page.

The fix: employer plan balances (a 401(k)) are excluded from the pro-rata pool. A Solo 401(k) that accepts incoming rollovers may be able to absorb the SEP-IRA balance, which can reduce the year-end IRA pool so that a backdoor Roth may convert with little or no tax, depending on your specific facts. Rolling the SEP-IRA into a Solo 401(k) before the backdoor step is generally the sequence that can support a cleaner conversion, though the outcome depends on your individual circumstances.

SEP-IRA vs. Solo 401k for CRNAs

For a 1099 or locum CRNA, the account choice is not neutral. A SEP-IRA is simple to open but poisons future backdoor Roths and has no employee deferral or Roth option. A Solo 401(k) allows an employee elective deferral, a Roth sub-account, incoming rollovers, and (with the right plan document) the mega backdoor Roth. Same income, very different flexibility.

For many self-employed CRNAs the Solo 401(k) is the more flexible account, and the SEP-IRA is often the one a CRNA later unwinds.

Solo 401k for nurse anesthetists: 2026 contribution limits

A Solo 401(k) is a one-participant 401(k), so it uses standard 401(k) limits. For 2026, the employee elective deferral is $24,500, plus an employer profit-sharing contribution of up to about 20% of net self-employment earnings (25% of compensation as defined by the plan), with the two combined capped at the section 415(c) limit of $72,000 (Source: IRS Notice 2025-67; IRS One-Participant 401(k) Plans).

Catch-up sits on top of that $72,000 and does not count toward the 415(c) cap. Age 50+ adds $8,000 (effective max about $80,000), and ages 60 to 63 add a super catch-up of $11,250 (effective max about $83,250) for 2026 (Source: IRS Notice 2025-67). See our detailed Solo 401(k) contribution limits for 2026 breakdown. A CRNA with strong contract income can shelter far more here than in a SEP-IRA, and the balance stays out of the pro-rata pool.

Mega backdoor Roth for CRNAs inside a Solo 401k

A mega backdoor Roth lets a self-employed CRNA route after-tax dollars into Roth well beyond the $24,500 deferral, up to the $72,000 total-additions limit for 2026 (Source: IRS Notice 2025-67). It requires a Solo 401(k) plan document that explicitly permits both after-tax employee contributions and in-plan Roth conversions. Off-the-shelf brokerage Solo 401(k) plans usually do not allow it.

The sequence is after-tax dollars going in, then a prompt conversion to the Roth sub-account so little or no growth is taxed. This is separate from the backdoor Roth IRA and can be run alongside it. Our mega backdoor Roth for high earners guide details the plan-document requirements a CRNA should confirm before relying on it.

1099, W-2, and locum tenens CRNA retirement plans

The account rules follow the paycheck type. A W-2 hospital-employed CRNA saves through the employer 401(k) or 403(b) and does the backdoor Roth entirely in a personal IRA. A 1099 or locum CRNA opens a Solo 401(k) (or, less ideally, a SEP-IRA) and controls the plan design directly. Many CRNAs hold both W-2 and 1099 income in the same year, so both tracks can apply.

One 2026 wrinkle splits the two. SECURE 2.0 Act section 603 requires age-50 catch-up contributions to be made as Roth for high earners, effective 2026, using a prior-year FICA-wage threshold set at $145,000 (indexed) under the statute (Source: SECURE 2.0 Act of 2022, section 603). A W-2 CRNA over that wage figure with one employer is subject to the mandatory-Roth catch-up in that plan. A purely 1099 CRNA has net self-employment earnings rather than FICA wages, so that CRNA generally falls outside the mandate and may still elect Roth voluntarily.

Roth conversion tax-bracket strategy: which year a CRNA should convert

The cheapest conversions happen in a CRNA’s natural low-income windows, not during peak contract years. Because conversions are taxed as ordinary income (Source: IRS Roth conversion guidance), the goal is to fill the space inside a lower bracket rather than convert a lump sum on top of a peak contract year. For many CRNAs the low-cost years are structural, not accidental.

• School years: the RN/ICU-to-CRNA transition and the DNP/DNAP program, when clinical income drops sharply.
• The gap year: between finishing the program and starting the first high-paying contract.
• Ramp-down years: a voluntary part-time or locum slowdown before full retirement.

The 2026 standard deduction ($32,200 married filing jointly; Source: IRS Rev. Proc. 2025-32) plus an unusually low earning year can leave a wide, cheap bracket to fill. The scenarios below assume married filing jointly and are illustrative only; actual brackets depend on filing status, deductions, and total income, so confirm figures with your CPA.

Illustrative only, not a projection of any client result. Tax on a conversion is ordinary income; the point is to convert where the rate is low, not simply to convert.

Will a CRNA Roth conversion trigger IRMAA Medicare surcharges?

It can, for CRNAs near or in Medicare age. IRMAA (the income-related Medicare Part B and Part D surcharge) is based on modified adjusted gross income from two years prior, and a large conversion inflates that MAGI. A conversion done at 63 or 64 can raise Part B and Part D premiums at 65 and 66. For a CRNA converting decades before Medicare, IRMAA is not a factor.

The planning response is to size conversions so they clear a bracket without crossing an IRMAA tier in the two-year lookback window, and to concentrate the largest conversions before that window opens. See the current tiers on our Medicare IRMAA 2026 brackets page. High 1099 income can also expose a CRNA to the net investment income tax and additional Medicare tax, which a conversion year should account for.

Form 8606 and the nondeductible IRA: the paperwork CRNAs miss

Form 8606 is where a CRNA reports every nondeductible traditional IRA contribution and every conversion. It is how the IRS tracks your basis, the after-tax dollars that should not be taxed again. Skipping it risks paying tax twice on the same money, and it leaves no record proving the backdoor Roth contribution was nondeductible.

File Form 8606 for the year you make the nondeductible contribution and again for the year you convert. If both spouses do a backdoor Roth, each files a separate 8606. Because the pro-rata calculation uses your December 31 IRA balances, clearing a SEP-IRA into a Solo 401(k) before year end may help the Form 8606 reflect a lower taxable conversion, depending on your December 31 IRA balances (Source: IRS Form 8606 and instructions).

How Rothology works for nurse anesthetists

Rothology Premier Roth Conversion is a flat-fee, fiduciary planning engagement built for the CRNA income pattern, billed as a single $11,000 one-time fee. Q3 Advisors is a registered investment adviser and sells no products. The service maps your pre-tax balances, models multi-year conversion amounts against your projected contract income, and coordinates the SEP-IRA-to-Solo-401(k) rollover step when a clean backdoor Roth is the goal.

A typical engagement includes a written multi-year conversion plan, tax projections coordinated with your CPA, and annual reviews to adjust as locum or contract income changes. Typical clients hold $750,000 or more in pre-tax assets. The first conversation is educational. You can review our Roth conversion break-even analysis before deciding whether a conversion fits your year.

Frequently asked questions

Can nurse anesthetists contribute to a Roth IRA if they make over $200K?

Not directly, in most cases. The 2026 Roth IRA phase-out ends at $168,000 single and $252,000 married filing jointly (Source: IRS Notice 2025-67), and a full-time CRNA usually earns past those limits. The route that still works is the backdoor Roth: a nondeductible traditional IRA contribution (2026 limit $7,500, or $8,600 at age 50+) followed by a conversion to Roth.

Does my SEP-IRA mess up a backdoor Roth (the pro-rata rule)?

Yes. The pro-rata rule pools every traditional, SEP, and SIMPLE IRA you hold on December 31, so SEP-IRA pre-tax dollars make your backdoor Roth conversion mostly taxable. The fix is to roll the SEP-IRA into a Solo 401(k), which is excluded from the IRA pool, before converting. That can reduce the year-end IRA pool, so a backdoor Roth may convert with little or no tax, depending on your circumstances.

Should a 1099 CRNA use a Solo 401k or a SEP-IRA?

For most 1099 or locum CRNAs, a Solo 401(k) is the more flexible account. It allows a $24,500 employee deferral plus profit sharing up to a combined $72,000 for 2026 (Source: IRS Notice 2025-67), a Roth sub-account, incoming rollovers, and the mega backdoor Roth. A SEP-IRA offers none of those and sits in the pro-rata pool, complicating future backdoor Roths.

Which year is typically the lowest-cost year for a CRNA to do a Roth conversion?

A low-income year. Conversions are taxed as ordinary income (Source: IRS Roth conversion guidance), so the lowest-cost years for a CRNA are structural dips: the DNP/DNAP school years, the gap between finishing the program and the first contract, and a voluntary part-time or locum ramp-down before retirement. Filling a lower bracket in those years costs far less than converting during a peak contract year.

Can I do a mega backdoor Roth through my Solo 401k as a self-employed CRNA?

Yes, if your Solo 401(k) plan document specifically permits after-tax contributions and in-plan Roth conversions. Standard brokerage plans usually do not. When allowed, after-tax dollars can move to Roth up to the $72,000 total-additions limit for 2026 (Source: IRS Notice 2025-67). A prompt conversion of the after-tax amount keeps taxable growth minimal.

Will a Roth conversion push me into IRMAA / higher Medicare premiums?

Only if you are near Medicare age. IRMAA uses modified adjusted gross income from two years prior, so a large conversion at 63 or 64 can raise Part B and Part D premiums later. Sizing conversions to stay under an IRMAA tier in the lookback window, and front-loading larger conversions before then, manages the surcharge. Converting decades before 65 does not affect IRMAA.

Is a Roth conversion worth it if I’m in the 32% or 35% bracket?

Often not in that year. Paying 32% or 35% now rarely beats a lower future rate, so a CRNA in a peak contract year usually defers and converts in a lower-income year instead. Conversion value depends on your current versus expected future bracket, whether outside cash pays the tax, and RMD exposure. It is a break-even question, not an automatic yes.

Sources

• IRS Notice 2025-67 and IRS Newsroom, “401(k) limit increases to $24,500 for 2026, IRA limit increases to $7,500” (2026): deferral, IRA, 415(c), catch-up, and phase-out figures.
• IRS Rev. Proc. 2025-32 (2026 inflation adjustments): standard deduction and federal income-tax bracket thresholds.
• IRS, “One-Participant 401(k) Plans” and “Self-employed individuals: Calculating your own retirement plan contribution and deduction.”
• IRS Form 8606 and instructions; IRS Roth conversion and recharacterization guidance.
• Tax Cuts and Jobs Act, Pub. L. 115-97, section 13611 (recharacterization of conversions repealed after 2017).
• SECURE 2.0 Act of 2022, section 603 (mandatory Roth catch-up for high earners, effective 2026).
• U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics (nurse anesthetist compensation).
• Centers for Medicare & Medicaid Services (IRMAA income-related Medicare surcharges).