CRNA Locum Tenens Financial Planning: What's Different and What Most Advisors Miss

Locum CRNA work has a financial profile unlike any other position in nursing. You can earn $300,000–$500,000+ per year as a pure 1099 contractor, choose which states you practice in, and control your schedule in ways hospital employment never allows. But that autonomy comes with a stack of financial decisions — entity structure, retirement account timing, multi-state tax optimization, benefits replacement — that most generalist advisors are not equipped to model accurately. This guide covers the complete financial picture for CRNAs doing locum work, whether you're transitioning from W-2 employment or already established in locum practice.

How locum CRNA arrangements are structured

Not all locum arrangements are the same from a tax standpoint, and the difference determines your financial planning options.

Direct 1099 contracts

You contract directly with a hospital, ASC, or physician group as an independent contractor. They pay you a 1099. You are fully self-employed — responsible for your own taxes, benefits, and business expenses. This arrangement gives you the most flexibility and the highest gross rates (typically $180–$280/hour for experienced CRNAs), but it requires you to handle all the administrative and financial infrastructure yourself.

Agency 1099 contracts

A locum tenens agency (AMN Healthcare, CompHealth, Barton Associates, etc.) finds the placement and handles credentialing logistics. They pay you as a 1099 contractor. You still bear full self-employment tax liability. Rates are typically $150–$230/hour — lower than direct contracts, but the agency handles scheduling, credentialing, and sometimes malpractice. Verify whether the agency covers malpractice or requires you to carry your own.¹

Agency W-2 arrangements

Some agencies employ locum CRNAs as W-2 employees and handle payroll taxes on their behalf. This eliminates your self-employment tax liability but reduces your gross pay to reflect the agency's FICA cost. A key downside: if the agency doesn't offer a retirement plan (many don't), you lose the ability to contribute to a Solo 401(k) on that income — because Solo 401(k) contributions require self-employment (1099) earnings. If you're taking W-2 from an agency without a retirement plan, your retirement savings vehicle is a standard IRA or, if eligible, a Roth IRA — far less than the Solo 401(k) capacity you'd have as a 1099 contractor.

S-corp election: when it makes sense for locum CRNAs

If you're contracting as a 1099 locum CRNA, an S-corp election can materially reduce your self-employment tax burden. The math depends on your income level and the cost of running the entity properly.

The SE tax problem

As a sole proprietor or single-member LLC (default disregarded entity), all of your net Schedule C income is subject to self-employment tax at 15.3% up to the Social Security wage base ($184,500 in 2026), then 2.9% Medicare on amounts above.² A CRNA netting $300,000 from Schedule C faces roughly $26,000–$28,000 in SE tax annually before any other federal or state income tax. Half is deductible, which reduces the effective cost, but it's still a substantial burden.

How an S-corp reduces SE tax

An S-corp is a pass-through entity. You, as the sole owner-employee, pay yourself a "reasonable salary" via W-2 payroll. The S-corp pays the employer half of FICA (7.65%) on that salary, and you pay the employee half. Net profits of the S-corp above your W-2 salary are distributed to you as a shareholder distribution — which is not subject to SE tax. This is where the savings occur.

Example: A locum CRNA nets $380,000 after business expenses as an S-corp owner. She pays herself a W-2 salary of $175,000 (a reasonable salary for a CRNA in her market). The remaining $205,000 flows as a shareholder distribution — not subject to FICA. The combined FICA savings versus a sole proprietor arrangement is approximately $15,000–$18,000 per year.³

When the S-corp is worth it

Running an S-corp has real costs: payroll service fees ($50–$150/month), a separate business tax return (Form 1120-S, typically $800–$1,500/year to prepare), and the administrative overhead of running payroll. At lower income levels, these costs consume the FICA savings. General rule of thumb:

• Below $80,000 net self-employment income: S-corp savings rarely exceed cost. Stick with sole proprietorship.
• $80,000–$150,000: Marginal — model the specific numbers with a CPA before electing.
• Above $150,000 net: The S-corp election is almost always worth it for a locum CRNA. At $250,000+ net, the annual savings can easily exceed $10,000.

Solo 401(k): maximum retirement savings for locum CRNAs

The Solo 401(k) (also called the Individual 401k or Self-Employed 401k) is the highest-capacity retirement savings vehicle for self-employed CRNAs. It allows contributions in two tiers:

• Employee deferral: Up to $24,500 in 2026 (plus $8,000 catch-up if age 50+, or $11,250 super-catch-up if ages 60–63).⁴
• Employer contribution: Up to 25% of W-2 compensation (for S-corp owners) or 20% of net self-employment income (for sole proprietors), up to a combined limit of $72,000 in 2026 (plus applicable catch-up).

How the Solo 401(k) works with an S-corp

If you operate as an S-corp, the "employer" contribution is 25% of your W-2 salary paid by the S-corp — not 25% of total S-corp net income. Your salary determines both your FICA exposure and your Solo 401(k) employer contribution room.

Example: $175,000 W-2 salary from the S-corp.

• Employee deferral: $24,500 (you contribute from your paycheck)
• Employer contribution: 25% × $175,000 = $43,750 (S-corp contributes to the plan)
• Total 2026 Solo 401(k): $24,500 + $43,750 = $68,250 (under the $72,000 415c cap)

Increasing the salary to $190,000 would allow: $24,500 + $47,500 = $72,000 (the 415c cap). Above that, additional salary doesn't create more Solo 401(k) space. The contribution limit is the binding constraint once salary is set to $190,000 or more.

Solo 401(k) setup timing

The Solo 401(k) plan must be established by December 31 of the tax year for which you want to make contributions. Employee deferrals must be contributed by December 31. Employer (profit-sharing) contributions can be made up to the tax return due date, including extensions — typically October 15 of the following year. If you transition to locum work mid-year and miss the December 31 deadline to establish the plan, you lose that year's deferral opportunity.

Multi-state tax strategy for locum CRNAs

Locum work frequently involves assignments across multiple states. The tax implications depend on where you work, where you live, and how long each assignment runs.

How states tax locum income

Most states that have an income tax require non-residents to file and pay tax on income earned within the state — including income earned during temporary locum assignments. If you do a 13-week assignment in California, California will tax the income you earn there at California rates (up to 13.3%). You'll also owe your home state's income tax on the same income if your home state taxes income, with a credit for taxes paid to other states (to avoid double-taxation). The credit reduces, but doesn't always eliminate, the combined tax burden.⁵

Strategic assignment location

Some locum CRNAs consciously choose assignment states based in part on state income tax:

• No-income-tax states: Texas, Florida, Nevada, Tennessee, Washington, Wyoming, South Dakota, Alaska. An assignment in Texas generates no state income tax for work performed there (and no credit needed on your home state return for Texas, since Texas has no tax to report).
• High-income-tax states: California (up to 13.3%), New York (up to 10.9%), New Jersey (up to 10.75%). High rates and aggressive non-resident filing requirements make these states expensive for locum work. The higher locum rates in these markets may or may not offset the state tax burden — model the after-tax numbers before accepting a placement.

This is not a reason to refuse high-tax state assignments — shortage premiums in California and New York can be substantial, and the pre-tax income difference often exceeds the state tax differential. But it's a real variable in the net income calculation that many CRNAs underestimate.

Reciprocity agreements and de minimis rules

Some neighboring states have reciprocity agreements that allow residents of one state to pay income tax only to their home state, regardless of where they work. These are generally limited to W-2 employees with regular cross-border commuting patterns — they typically don't apply to locum contractors doing temporary assignments. A few states also have de minimis thresholds (number of days worked before non-resident filing is required). These vary widely by state and change, so confirm current rules with a CPA who handles multi-state returns before assuming any exemption applies.

Benefits replacement for locum CRNAs

When you leave W-2 employment for locum work, you lose the benefit package that made W-2 employment look cheaper than it was. The economic replacement cost is substantial and must be factored into any income comparison.

Health insurance

Without employer-sponsored coverage, you're in the individual market. Options:

• ACA marketplace plans: Premiums vary widely by age, location, and plan tier. A CRNA earning $300K+ will not qualify for ACA subsidies (subsidy eligibility phases out above 400% of FPL, which is approximately $60,000 for a single filer). Expect $600–$1,800/month for an individual plan, more for family coverage.
• Short-term health plans: Lower premiums but limited benefits. Not a substitute for comprehensive coverage given the financial exposure of a catastrophic event during a CRNA's working years.
• COBRA: If leaving employer coverage, you can continue it via COBRA for up to 18 months — but you pay both the employer and employee portions. This is often expensive but useful as a bridge while evaluating permanent options.

As an S-corp owner, premiums you pay for your own health insurance (and your family's) are deductible as an above-the-line adjustment — but only after the S-corp reports the premiums on your W-2 as income. This effectively makes the deduction available, but the mechanics require coordination with your payroll provider.

Disability insurance

Your employer's group long-term disability plan disappears when you leave. Individual own-occupation disability insurance is a non-negotiable replacement — a CRNA earning $350,000/year has a financial asset (their earning capacity) worth several million dollars. Loss of that earning capacity to illness or injury without coverage is catastrophic.

Key considerations for locum CRNAs: locum and independent contract work is sometimes treated differently by disability insurers. Some carriers view your occupation as "medical professional" broadly (favorable); others may view frequent assignment changes or your specific practice setting as a higher-risk factor and limit the benefit period or impose exclusions. Work with a broker who specializes in healthcare professional disability to find coverage that applies own-occupation definitions to anesthesia practice — not a generalized "medical professional" definition that might qualify you for benefits only if you can't practice nursing at all.

Malpractice insurance

As noted above, locum CRNAs need individual professional liability coverage. Occurrence-based policies are strongly preferred — they eliminate the tail coverage obligation each time you change assignments. See our detailed guide on CRNA malpractice insurance for a full breakdown of occurrence vs claims-made, tail costs, and the AANA group program.

Financial checklist before going locum

Before you submit your resignation letter, confirm each of these:

1. Entity established and bank account open. LLC or S-corp formation (if electing S-corp treatment) takes 2–6 weeks depending on state. Do this before your first assignment, not after.
2. EIN obtained from IRS. You need an Employer Identification Number to open a business bank account, run payroll, and open a Solo 401(k). Takes minutes at IRS.gov.
3. Solo 401(k) plan established. Open the plan before December 31 of your first year of locum income. Fidelity, Vanguard, and Schwab offer no-cost Solo 401(k) plans; Fidelity allows after-tax contributions (for mega-backdoor Roth) if that matters to you.
4. Quarterly estimated tax schedule set up. Locum income has no withholding. Quarterly estimated payments (April 15, June 15, September 15, January 15) are required to avoid underpayment penalties. Estimate conservatively — a CRNA moving from $220,000 W-2 to $380,000 gross locum income will have a substantial first-year tax liability even after business deductions and retirement contributions.
5. Individual malpractice coverage bound. You must have individual coverage before your first 1099 assignment begins. Don't start working while waiting for underwriting to complete — schedule this 4–6 weeks before your first locum day.
6. Health insurance secured. If COBRA-bridging, enroll within 60 days of your W-2 coverage ending. If going direct to an individual plan, compare marketplace options during your open enrollment window or qualify for a special enrollment period (job loss qualifies).
7. Disability insurance applied for. Don't let your W-2 group LTD lapse without an individual policy in force. Underwriting takes 4–8 weeks. Apply before you resign.
8. Tax-home documentation in place. If you're traveling for assignments and deducting housing and travel as business expenses, your tax home (principal place of business) must be established and documented. Assignments that are "temporary" (expected to last less than one year) at a location away from your tax home generate deductible travel expenses. If an assignment extends beyond one year or is indefinite, it becomes your new tax home and travel expenses are no longer deductible. Keep records from day one.

Sources

1. AANA — Locum Tenens Resources for CRNAs — locum tenens practice guidance, credentialing requirements, and malpractice coverage considerations for independent CRNAs.
2. IRS — Self-Employment Tax — SE tax rate 15.3% (12.4% SS + 2.9% Medicare) on net self-employment income up to SS wage base; 2.9% Medicare on amounts above. 2026 SS wage base $184,500 per IRS Rev. Proc. 2025-67.
3. IRS — S Corporations — S-corp structure, reasonable compensation requirement, and shareholder distribution treatment for FICA purposes.
4. IRS — One-Participant 401(k) Plans (Solo 401k) — employee deferral limit $24,500 (2026); total 415(c) annual additions limit $72,000 (2026); employer contribution 25% of W-2 compensation for S-corp owners.
5. Nolo — State Income Tax for Traveling Workers — non-resident state filing obligations for income earned in states other than your domicile; reciprocity agreement limitations for contractor vs employee workers.

Tax limits and contribution maximums verified as of Q2 2026 against IRS Rev. Proc. 2025-67. State tax rates and rules change — confirm current non-resident filing requirements with a CPA who handles multi-state returns. Entity and S-corp election timing rules are federal rules; state conformity varies.