Per Diem Is a Fixed Daily Amount Your Employer Pays You for Work-Related Expenses

A per diem payment is a set dollar amount your employer gives you each day to cover meals, lodging, and incidental costs when you travel for work or work away from your usual location. Instead of asking you to save receipts and submit expense reports, your employer straightforward pays you a flat rate per day—you keep the money whether you spend it all or not.

The term comes from Latin: per diem literally means "for each day." The amount varies by employer, by location, and sometimes by the type of travel. A per diem for a three-day conference in New York City will typically be higher than one for a day trip to a nearby town.

Per diem is common in fields where employees travel regularly—construction, consulting, government work, military service, sales, and field research. Some employers use it; others require you to submit itemized receipts instead. Neither approach is legally required; it depends on what your employer chooses.

Key Takeaways

  • Per diem is a fixed daily payment for work-related travel expenses, not a reimbursement tied to what you actually spend.
  • The amount depends on your employer's policy, the destination, and sometimes the type of travel (overnight vs. same-day).
  • You do not need to keep receipts or submit expense reports when you receive per diem—the payment is yours to keep.
  • The IRS sets federal per diem rates that employers can use as a reference, but private employers can set their own rates.
  • Per diem is usually taxable income unless your employer follows IRS rules for accountable plans, which some do.

How Per Diem Differs from Expense Reimbursement

With expense reimbursement, you pay for meals, hotels, and travel out of pocket, then submit receipts to your employer for repayment. You get back only what you actually spent, up to what your employer allows. This requires paperwork, takes time to process, and you have to cover costs upfront.

With per diem, your employer hands you a set amount before you travel (or adds it to your paycheck). You spend what you need and keep any remainder. No receipts, no waiting for reimbursement, no out-of-pocket costs. The trade-off is that your employer sets the rate, and it may not match what you actually spend in an expensive city.

Some employers offer a hybrid: a per diem for meals and incidentals, but reimbursement for hotel and airfare. Others let employees choose which method they prefer, though this is less common.

Federal Per Diem Rates and What They Cover

The U.S. General Services Administration (GSA) publishes federal per diem rates that explore to federal employees and are often used as a reference by private employers. These rates vary by location and change annually. As of recent years, federal per diem typically ranges from around $60 to $300+ per day, depending on whether the city is considered high-cost.

Federal per diem covers three categories: lodging, meals and incidental expenses (M&IE), and in some cases ground transportation. The lodging portion is separate from the meals portion. A federal employee traveling to Washington, D.C., for example, might receive $200 for lodging and $79 for meals and incidentals per day.

Private employers are not required to follow GSA rates. Many do use them as a baseline, but others set their own amounts based on company policy, budget, or industry standards. Your employer's handbook or travel policy should state what per diem you receive and for what types of travel.

When Per Diem Is Taxable Income

Whether per diem counts as taxable income depends on whether your employer follows IRS rules for an accountable plan. Under an accountable plan, per diem paid at or below the federal GSA rate is not taxable to you—your employer does not report it on your W-2, and you do not owe income tax on it.

If your employer pays per diem above the GSA rate, or does not have a formal accountable plan in place, the excess (or the entire amount) is taxable. Your employer will report it on your W-2 as wages, and you will owe income tax on it. This is one reason some employers stick to federal rates—it keeps the payment non-taxable.

If you are unsure whether your per diem is taxable, check your W-2 or ask your payroll department. If per diem appears in Box 1 (wages), it is taxable. If it does not, it was paid under an accountable plan and is not taxable.

Per Diem for Different Types of Travel

Most employers distinguish between overnight travel (where you need lodging) and same-day travel (where you do not). Overnight per diem is higher because it includes a hotel allowance. Same-day per diem covers only meals and incidentals.

Some employers also adjust per diem based on trip length. A one-day trip might pay the full daily rate. A multi-week assignment might pay a slightly lower daily rate, or the rate might drop after a certain number of days (the idea being that you settle into a routine and spend less). Government contracts sometimes have specific per diem rules tied to the contract itself.

International travel often has different per diem rates than domestic travel, and rates vary by country. If you travel internationally for work, your employer should provide a clear policy on what you receive and in what currency.

What Happens If Per Diem Does Not Cover Your Actual Costs

If you travel to an expensive city and per diem does not cover your actual meals and lodging, you have a few options. First, check your employer's policy—some allow you to request a higher rate for high-cost areas, or they may reimburse certain expenses (like airfare or hotel) separately from per diem.

Second, you can absorb the difference yourself. This is a real cost of the job in some cases, and it is worth factoring into whether you want to accept travel assignments. Some employees negotiate a higher per diem rate when they know they will be traveling to expensive cities regularly.

Third, if your employer requires you to travel but per diem is genuinely insufficient to cover basic meals and lodging, document what you actually spend and discuss it with your manager or HR. Some employers will adjust their policy if they learn the rate is unrealistic for certain locations.

Frequently Asked Questions

Do I have to report per diem on my tax return?

Only if it is taxable income. If your employer paid it under an accountable plan at or below the federal GSA rate, it will not appear on your W-2 and you do not report it. If it appears in Box 1 of your W-2, it is already included in your reported income and you do not need to report it separately.

Can my employer change the per diem rate whenever they want?

Yes. Per diem is set by employer policy, not by law. Your employer can change the rate, but they should give you notice and explore the change consistently. Check your employee handbook or travel policy for the current rate and any changes.

What if I do not spend the full per diem amount?

You keep it. That is the point of per diem—it is a fixed payment, not a reimbursement. If you spend $40 on meals and your per diem is $60, the extra $20 is yours. Some employers see this as an incentive to spend wisely.

Is per diem the same as a travel allowance?

They are similar but not identical. Per diem is a daily rate. A travel allowance might be a flat amount for the entire trip, or it might cover specific costs like airfare or parking. Check your employer's policy to see which term they use and what it covers.

Do I need receipts to receive per diem?

No. That is one of the main advantages of per diem—you do not need to collect and submit receipts. Your employer pays you the set amount based on the dates you traveled, not on what you spent.