What Actually Triggers an IRS Review of Travel Nurse Stipends

What Actually Triggers an IRS Review of Travel Nurse Stipends

Your agency tells you your stipends are “tax-free.” That’s shorthand, not a rule — the actual rule is a specific IRS test with a name, a citation, and edge cases that agencies routinely skip over because they aren’t tax professionals. Here’s what the IRS actually requires, sourced directly to its own guidance rather than to travel-nursing folklore.

This article won’t tell you how many nurses get audited or invent a dollar figure for what an audit costs — nobody publishes IRS audit-selection statistics by occupation, and any number claiming to be one is a guess dressed up as data. What it will do is walk through the three tests that actually govern whether your stipends are tax-free, with citations, so you can check your own situation against the real rule instead of a recruiter’s paraphrase of it.

Test 1: Is Your Assignment “Temporary” Under the One-Year Rule?

Tax-free treatment of travel and living-expense reimbursements under IRC §162(a)(2) depends on being “away from home” for work — which requires that your tax home stay put somewhere else while you travel for an assignment. The IRS’s controlling guidance on what counts as “temporary” is Revenue Ruling 93-86, summarized in IRS Topic 511 and Publication 463:

• An assignment you realistically expect to last one year or less, and that actually does, is temporary.
• An assignment you expect to last more than one year is indefinite from day one — regardless of how it actually turns out.
• An assignment that starts out realistically expected to last a year or less but is later extended past a year becomes indefinite on the date your expectation changes — not retroactively from the start, but also not excused just because the overrun wasn’t your idea.

The practical trap here isn’t the 13-week contract — it’s the extension, and there is no grace period for “it ran long for reasons outside my control.” If you sign a 13-week contract at one hospital, then a same-facility extension, then another, the moment you know (or should know) the total will run past 12 months is the moment your tax home at that location changes — regardless of whose decision extended it. Stipends paid after that point are taxable income, even though the ones paid before it were fine. And if you never updated your expectation but the assignment actually runs past a year anyway, don’t assume the “temporary” label survived by default — that’s exactly the fact pattern a reviewer would ask you to explain.

What Publication 463 says happens if your assignment is indefinite: you must include in income “any amounts you receive from your employer for living expenses, even if they are called travel allowances and you account to your employer for them.” There’s no partial credit — indefinite status doesn’t just cap your deduction, it converts the whole reimbursement to wages.

Test 2: Do You Have a Real Tax Home to Be “Away” From?

Rev. Rul. 93-86 also supplies the tax home definition itself: your tax home is your regular place of business. If you have no regular place of business (true of most full-time travelers), your tax home is instead where you maintain personal and business connections “in a real and substantial sense.”

This is the test that actually catches people, because it’s about substance, not paperwork. The IRS and the Tax Court look for facts like:

• You pay for lodging at your claimed home location while also paying for lodging at the assignment — this is the “duplicate expenses” test. A room at your parents’ house you don’t pay for isn’t a duplicate expense.
• You have an economic reason to return there between assignments (a lease, a mortgage, local PRN work, family you support).
• You actually go back periodically, rather than treating it as a mail-forwarding address.

None of this is about hitting a specific number of nights per year or filing a particular form — those are agency-invented rules of thumb, not IRS tests. If you can’t show duplicated expenses and real ties, the IRS’s position is that you don’t have a tax home distinct from wherever you’re currently working, which means you can’t be “away from home” no matter how many assignments you string together.

Test 3: Did Your Per Diem Stay Within the Federal Rate?

This is the one agencies most often get backwards. Under the accountable-plan regulations (Treas. Reg. §1.62-2) and the per diem substantiation procedures (most recently Rev. Proc. 2019-48), a per diem payment is only “deemed substantiated” — and therefore excludable from income — up to the applicable federal per diem rate for that locality. Anything paid above that rate for a given day is, in the IRS’s own language, “treated as paid under a nonaccountable plan” — meaning it’s taxable wages, subject to withholding, whether or not you kept receipts for it.

For a travel nurse on assignment in the continental US, “the applicable federal per diem rate” is the GSA locality rate for lodging plus the M&IE (meals & incidentals) tier for that city — the same numbers our GSA Rate Explorer pulls directly from GSA’s own per-diem API. Alaska and Hawaii are the exception: GSA doesn’t set rates there at all — the federal per diem for those states is published by the Department of Defense’s Per Diem, Travel and Transportation Allowance Committee, not GSA, so a GSA locality lookup simply doesn’t apply to an Alaska or Hawaii assignment. If your combined weekly housing and meal stipend exceeds the applicable locality’s federal ceiling, the excess is taxable, full stop — not a gray area, not something a recruiter’s internal policy can wave through.

Two things this does not mean:

• It doesn’t mean your stipend has to be “reasonable” by some vague standard. It means it has to be at or below a specific published number for that specific city and month, which you can look up.
• It doesn’t mean every dollar over the ceiling triggers automatic scrutiny of your whole return. It means that specific excess is owed as ordinary income tax — an amount you (or your agency’s payroll withholding) can true up on your own.

The Statute of Limitations, Correctly Stated

Travel-nursing forums often cite a flat “3-year audit window.” That’s the general rule under IRC §6501, but it isn’t the only one:

• 3 years from filing, in the ordinary case.
• 6 years, if you omit gross income exceeding 25% of what you reported (§6501(e)) — a bar that a large, unreported stipend excess could plausibly clear on its own.
• No limit, if a return is fraudulent or was never filed at all.

There’s no fixed dollar figure that “back taxes plus penalties” adds up to across a multi-year travel career — that depends entirely on your bracket, how many years and how much excess stipend were involved, and whether the failure was to report an accountable-plan excess versus something more serious. Anyone quoting you a specific total for “what an audit costs a travel nurse” is guessing.

What to Actually Do About It

Check your assignment length against the one-year rule before you sign an extension, not after. If a string of contracts at one facility is trending past 12 months, that’s the moment to either plan a real break or accept that stipends after that point are taxable.

Keep the proof of a duplicated tax home as you go, not when a letter arrives: your lease or mortgage statement, utility bills, and — if relevant — pay records from local PRN work. Rev. Rul. 93-86 is a facts-and-circumstances test; the facts are what you’re being asked to show.

Check your locality’s federal per diem rate directly rather than trusting an agency’s “standard” stipend for a market. Our GSA Rate Explorer shows each locality’s annual peak lodging rate — useful as an upper bound, but roughly 1 in 3 GSA localities (Austin and Bozeman are two) set a lower rate for part of the year. If your assignment falls in an off-peak month for a seasonal locality, being under the peak figure shown doesn’t guarantee you’re under that month’s actual ceiling — check the month-specific rate on GSA’s own per diem lookup before relying on the peak number as your ceiling.

Run your specific facts through a structured checklist before you file. Our Tax Home Validator walks through the same duplicate-expense and temporary-assignment questions covered above and flags which ones your situation doesn’t clearly satisfy.

If your situation is genuinely borderline — long strings of same-facility extensions, an ambiguous tax home, or a stipend you now realize exceeded the federal rate for months — that’s a conversation for a CPA or enrolled agent, not an article. The tests above tell you what the IRS is actually checking for; a licensed preparer who can see your specific contracts and lease is the one who can tell you where you land.

---

If your stipend does turn out to be partly or fully taxable, that changes your real take-home pay materially. Run the taxable-vs-nontaxable comparison in our Travel Nurse Pay Calculator to see what a fully-taxed rate would need to look like to leave you in the same place.