Is Per Diem Taxable? The 3 Tests That Decide (2026)

Is per diem taxable? Usually not, and not by default. Federal law treats per diem as a reimbursement, so it stays off your W-2 only while the payer can prove it: a real tax home you are still paying for, an accountable plan that asks for paperwork, and an amount at or under the federal ceiling for your city and month. Fail any one of the three and the answer flips to yes for the whole amount, not only the part above the line. The tests below check your own offer against each one, in order.

What “Per Diem” Actually Means in a Nurse Contract

Recruiters call the entire tax-free part of your package per diem. The IRS does not. Federally, per diem is a daily allowance for meals and incidental expenses, the M and IE line. Housing is a separate allowance with its own separate ceiling, its own rate table, and its own failure modes.

That distinction is where money is lost. Your housing ceiling and your meal ceiling come from two different numbers in the same government table, and they are tested separately. A package can be perfectly legal on housing and still be over the line on meals, or the reverse. If your offer letter shows one blended “stipend” number, ask for it split into the two parts before you sign.

Line in your offer	Ceiling comes from	Tested against
Housing stipend	GSA lodging rate for your assignment county	Per night, and it changes with the season
Meals and incidentals	GSA M and IE rate for the same county	Per day, first and last day at 75 percent
Blended “stipend”	Nothing. It is an agency word, not a tax category	Ask for it split, then test both halves

Test 1: Do You Have a Tax Home?

This is the test that fails most expensively, because failing it does not trim your per diem: it converts all of it into ordinary wages.

The IRS position is that travel is temporary only if you have somewhere to return to. Three factors decide it: where you are registered to vote, where your driver’s license is issued, and where you actually spend your time off. Add to that the practical requirement that you are paying for that home while also paying for housing on assignment (the duplicate expense) and you have the whole test.

The failure pattern I see most: a nurse lets go of the apartment, moves into a friend’s spare room for nothing, keeps working contracts. No rent, no utilities in their name, no second home cost. The stipend stops being a reimbursement and starts being a bonus, and bonuses are taxable. Our travel nurse tax home rules guide walks the three factors in detail and the duplicate expenses checklist lists the 17 line items that count.

Test 2: Is Your Plan Accountable?

An accountable plan has three requirements, all of them, or the arrangement is non-accountable by definition:

1. The allowance has a business connection: it is for work, not a reward.
2. You substantiate it: dates, location, receipts or a reasonable allocation, within a reasonable time.
3. You return anything above the documented amount.

Most agencies do run accountable plans, but not all. Some pay a flat weekly stipend with no paperwork at all, because it is easier to administer and reads better on a job board. That convenience has a tax cost: under a non-accountable plan every dollar is wages, subject to income tax and the 7.65 percent payroll tax, even if your rate is well under the government ceiling.

One question settles it: “What do I have to submit to substantiate my stipend, and is my plan accountable under IRS rules?” If the recruiter hesitates, get the answer in writing before signing.

Test 3: Are You Under the Ceiling for Your City and Month?

The federal government publishes a nightly lodging rate and a daily M and IE rate for every county it covers. Up to those numbers an agency can pay you a flat allowance and the tax code treats the expense as already documented, no receipts. Above them the money can still be tax-free, but only if you prove what you actually spent, so the federal figure marks where the paperwork starts.

Two details people miss:

The lodging rate is seasonal. It is not one number per city. San Francisco runs $325 a night in January through March and $232 in April through August. Same contract, same hospital, wildly different ceiling. Phoenix swings from $122 in summer to $232 in February and March.

M and IE is per day and it is much flatter. Most cities sit at $68, $80, $86 or $92 a day. The full tier list, city by city, is on its own page. GSA’s own split of a $68 day is $16 breakfast, $19 lunch, $28 dinner and $5 incidentals, and your first and last travel day count at 75 percent of the rate, which is $51. That matters when you are doing the arithmetic on a partial week.

Worked Example: Same City, Two Packages

Two nurses take the same 13-week Denver assignment starting in January. Denver’s FY2027 lodging rate for November through March is $170 a night and M and IE is $92 a day, so over 91 days the ceilings are $15,470 on housing and $8,372 on meals: $23,842 combined.

• Nurse A is offered $1,100 a week housing and $600 a week meals. Over 13 weeks that is $14,300 plus $7,800, inside both ceilings. Tax-free, assuming she keeps her tax home and files paperwork.
• Nurse B is offered $1,450 a week housing and $750 a week meals. That is $18,850 plus $9,750, which is $3,380 over the housing ceiling and $1,378 over the meals ceiling. $4,758 becomes taxable wages: about $364 of that is payroll tax before any income tax is applied.

Both recruiters will describe their package as “top of market.” Only one of them is telling the nurse the truth about what she keeps.

What Happens When You Go Over

Above the federal ceiling the money is not automatically tax-free. Without proof of what you actually spent, the excess is reclassified as wages. Three consequences follow, and the third is the one nobody mentions:

1. It is subject to federal income tax and, in most states, state income tax.
2. It picks up 7.65 percent in payroll tax on top, because it is now wages.
3. Your W-2 gets bigger, which can change your eligibility for the Saver’s Credit, raise your AGI for ACA subsidy purposes, and affect income-driven repayment calculations that key off reported income.

Agencies do not always catch this for you. Some pay above the ceiling knowingly and simply report the excess as wages: fine, if they tell you. Others label the excess a completion bonus, which is still wages, and you find out in April.

The Edge Cases That Trip Travelers Up

You extended past 12 months in one metro

Past roughly a year in the same location, the assignment stops being temporary in the IRS’s eyes and that city becomes your tax home. Your old home stops qualifying. Per diem stops being a reimbursement. This is why extensions are negotiated as new contracts in new metros more often than recruiters will explain.

You commute from your tax home

No sleep-or-rest requirement means no away-from-home deduction, no matter what the contract calls the money. If you drive home every night, the stipend is a bonus.

You keep a room at your parents’ house

It can work, but only as a real rental: a written agreement, fair-market rent, money actually moving, records to prove it. An address you use for mail does not survive examination.

You are a 1099 worker

There is no tax-free per diem on a 1099. Everything is gross income; you deduct actual housing, meals at 50 percent and mileage against it. Different math entirely: the 1099 versus W-2 comparison runs the numbers.

Frequently Asked Questions

Is per diem considered income?

Not when it clears all three tests. Then it is a reimbursement, not income, and it never appears as taxable wages. Fail any test and it is income in full.

Do I pay Social Security and Medicare on per diem?

No, when it is properly structured, because FICA applies to wages and an accountable-plan reimbursement is not wages. This is precisely why an agency shifting pay from stipend to hourly costs you 7.65 percent on the moved dollars.

How much per diem is tax-free?

Up to the federal ceiling for your county and your dates, no receipts are needed. Above that ceiling nothing is exempt by itself: the excess stays tax-free only if you document what you actually spent, which is paperwork most agencies never collect. The calculator above gives you the number for a specific city and month.

Do I need receipts for per diem?

For M and IE under the federal rate, substantiation is usually light: dates and location suffice, which is a genuine convenience. For housing you need to show the expense was incurred and that you maintained the duplicate cost at home.

Does per diem count for a mortgage application?

Increasingly yes, with documentation. Lenders will often count 12 months of consistent stipend deposits as qualifying income, but underwriters differ, and because tax-free stipends keep your AGI low they can also make you look like you earn less than you do. Keep pay stubs that show the stipend line separately.

What if my agency pays a flat weekly rate with no paperwork?

Then it is probably non-accountable and the whole amount is wages regardless of the ceiling. Ask before you sign; this single question changes your take-home more than most rate negotiations.

Related Guides

• The IRS three-factor tax home test
• Duplicate expenses checklist, with a printable PDF
• Housing stipend calculator by city
• 1099 vs W-2: which contract nets more
• Multi-state filing, step by step

Educational content, not personalized tax advice. Rates reset every federal fiscal year on October 1. Confirm current figures at gsa.gov/perdiem and irs.gov before signing.

Next step: Once you know which part of your pay is tax-free, budget around it. Our free travel nurse budget spreadsheet tracks taxable wages and tax-free stipend in separate columns instead of blending them into one income line.

Sources we checked

Every figure on this page came from one of the documents below, not from another blog. Links checked 10 October 2026.

• GSA FY2027 per diem rate file (XLSX, effective 1 October 2026): The workbook the city-by-city lodging and M&IE ceilings on this page were read from.
• GSA per diem rates: The FY2027 lodging and M&IE schedules the housing and per-diem figures on this page are measured against.
• GSA M&IE breakdowns: the per-meal split of the $68 standard rate ($16 breakfast, $19 lunch, $28 dinner, $5 incidentals) and the 75 percent first and last travel day figure.
• IRS Publication 463 – Travel, Gift, and Car Expenses: The tax-home definition, the temporary-versus-indefinite assignment test and the one-year rule every per-diem answer on this page rests on.
• IRS Topic No. 511 – Business travel expenses: The rule that an employee’s unreimbursed travel and mileage is not deductible, which is why the answer for a W-2 contract is zero.
• IRS Publication 15 (2026), Employer’s Tax Guide: The employer side of the same rule: a non-accountable travel payment is wages and carries income tax, Social Security, Medicare and FUTA.