The Locum CRNA Tax Home Trap: The $40K Mistake Nobody Warns You About

There are two kinds of locum CRNAs: the ones with a valid tax home and the ones the IRS considers "itinerant." The difference can be $30,000 to $50,000 per year in after-tax income. Most agencies don't explain it. Most new locum providers find out the hard way.

Here's the entire trap, in plain English.

What a tax home actually is

Your tax home is not where you live. It's where your regular place of business or employment is — the city or general area from which you normally work. Housing stipends, meals, mileage, and lodging are only deductible (or tax-free when reimbursed) when you're away from your tax home overnight for work.

If the IRS decides you don't have a tax home, you're "itinerant." Every dollar your agency pays you for housing, meals, or travel gets added to your taxable income, and nothing becomes deductible.

A full-time locum CRNA with no tax home getting $3,000/month in housing stipends turns $36,000 of previously-tax-free reimbursements into taxable income. At a marginal federal rate of 32% plus state tax, that's $12,000–$15,000 of additional tax. On an average-size locum year with per diem meals stacked in, the total cost of itinerant status commonly hits $25,000–$50,000.

The three requirements for a valid tax home

The IRS looks for all three:

1. A regular place of business or a home in the area where you work regularly.
2. Duplicate living expenses. You maintain housing costs (mortgage, rent, utilities) at your tax home while paying for housing at your work location.
3. A personal connection to the area. Voter registration, driver's license, family ties, community involvement.

Missing any one of these puts you on thin ice. Missing two usually means itinerant status.

What kills tax home status (real examples)

• You moved in with family, rent-free, as your "home base." No duplicate living expenses. IRS position: your tax home follows you.
• You're on the road 11 months a year with one week "home" at a friend's spare bedroom. Too little connection, no real residence.
• You "live" at an RV park you visit four weeks a year. Personal connection is weak; duplicate expenses argument is weak.
• You sold your house to fund the locum lifestyle. No residence = no tax home.

What protects tax home status

• Own or rent real housing year-round in one state. Mortgage, utilities, cable, renter's insurance — the paper trail. The house can be used by family, rented short-term, or empty. It just needs to be real.
• Return home between assignments. The IRS doesn't define "how often," but a pattern of returning home between 4-12 week assignments is strong. A pattern of never returning home is bad.
• Register everything at home. Driver's license, voter registration, car registration, professional license (where legal), primary credit card billing address, bank statements. If any of these are at a PO box or a family member's address, IRS will question it.
• Work at least some of the year "at home." Even part-time W2 work in your home state, or telehealth consulting, strengthens the argument substantially.
• Keep records. Calendar showing days at home vs. away. Utility bills. Rent or mortgage statements. Travel receipts.

The per diem deduction most locums miss

When you have a valid tax home and are working away from it overnight, the IRS publishes standard per diem rates (see Publication 463) for meals and incidentals. In 2026, this is typically $60–$80/day depending on the city you're assigned to.

A full-time locum CRNA spending 180 days away from home at $70/day averages $12,600 in above-the-line per diem deductions. If you're 1099, this goes on Schedule C. If you're W2 through an agency, you lose most of this (post-TCJA) — a strong reason for most full-time locums to operate as 1099.

The agency housing stipend math

Agencies typically structure locum comp as some combination of hourly pay plus a housing stipend or agency-provided housing. The tax treatment:

Your status	Agency-provided housing	Housing stipend	Hourly pay
Valid tax home, away from home	Tax-free (if for employer convenience)	Tax-free up to IRS per diem	Fully taxable
Itinerant (no tax home)	Taxable at FMV	Fully taxable	Fully taxable

The difference for a provider earning $200/hr at 1,900 hours plus $3,000/month housing: roughly $36,000 in taxable income swings based entirely on tax-home status.

The documentation you actually need

If you're audited — and locum CRNAs are audited at rates well above the general population — the IRS wants to see:

• A lease or mortgage in your name at your tax home
• Utility bills in your name at that address (year-round)
• Bank statements mailed to that address
• A mileage log or travel calendar showing assignment-level away-from-home time
• Original receipts or agency documentation for housing, meals, and travel (keep 7 years)
• Proof of your personal ties: driver's license, voter registration, vehicle registration

None of this is hard if you set it up when you start locum work. All of it is a mess if you try to reconstruct it three years after the fact.

Common agency advice that's wrong

• "Just get a cheap apartment in [low COL state] and that's your tax home." Only if you actually live there sometimes and maintain real expenses. An empty apartment you visit twice a year is not a tax home.
• "RV lifestyle CRNAs have their RV as their tax home." The IRS has explicitly rejected this in multiple rulings. An RV is not a tax home.
• "Your agency handles the tax home question." No agency has standing to decide your tax home status. They handle payroll; you handle your tax situation.

When to talk to a CPA who knows locum tax

Before your first locum year, not during your third. A 1-hour consult with a CPA who specializes in healthcare 1099 practice costs $300–$600 and will save you $10,000+ over a career. The CPA should be comfortable with:

• Schedule C reporting for 1099 CRNA income
• Per diem deductions under Publication 463
• Tax home analysis
• Multi-state tax allocation (nexus rules vary)
• S-Corp election timing if your 1099 income exceeds ~$150K

The practical checklist

1. Own or rent real housing in one state. Maintain it year-round.
2. Register everything at that address.
3. Work at least some days per year at or from that address.
4. Keep a travel calendar.
5. Keep utility bills and receipts for 7 years.
6. Find a CPA who has done this before.

Get these right and the locum life's real financial upside opens up. Get them wrong and you'll spend the rest of the decade paying back the IRS on income you thought was tax-free.

This is the single most important financial decision a new locum CRNA will make in their first year. Nobody else is going to make it for you.

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Want to run the actual numbers? Try the Should I Go 1099? decision tool, the 1099 vs W2 Calculator, and the Quarterly Tax Estimator. For the full locum playbook, see the Locum Life guide.