Per diem is the most valuable deduction available to an over-the-road owner-operator and the one most often claimed incorrectly. Both of those things are true at once, which is why it shows up so frequently in examination adjustments.
Here is who actually qualifies, what the rules allow, and what you need to keep.
The two advantages
For drivers subject to Department of Transportation hours-of-service limits, the tax law provides two distinct benefits.
The 80% rule. Business meals are generally deductible at 50%. Individuals subject to DOT hours of service get a special rule allowing 80%. On a driver with substantial road days, that difference alone is worth thousands.
The per diem rate. Rather than tracking actual meal costs and keeping every receipt, a driver may use a standard per diem amount for meals and incidental expenses. There is a special transportation industry rate published for this purpose, and it is generally higher than the standard rate for other travelers.
Combined, those two provisions let a qualifying driver deduct 80% of a fixed daily amount for every qualifying day, with no meal receipts at all. That is a genuinely favorable rule, and it exists because the alternative — asking drivers to keep receipts for every meal at every truck stop for a year — is unrealistic.
The requirement that disqualifies people
Per diem is a travel expense, and travel expenses require you to be away from your tax home substantially longer than an ordinary day's work, and long enough that you need sleep or rest to meet the demands of the job.
In practice, that means an overnight. Not a long day. Not fourteen hours logged. An actual period away from home requiring rest.
So:
- Over-the-road drivers who sleep away from home — qualify for the days they are out.
- Regional drivers with a mix — qualify for the nights out, not for the days they are home.
- Local drivers home every night — do not qualify, regardless of hours worked, miles driven, or how much they spend on food. This includes a great many oilfield and short-haul drivers.
Claiming per diem for days you slept in your own bed is one of the most reliably adjusted items in this industry, and it is not a gray area.
Partial days
The day you leave and the day you return are partial days, and the rules provide a reduced amount for them — commonly three-fourths of the full daily rate. Drivers who claim a full day for every calendar day on the road, including departure and return, are overstating the deduction on every single trip.
Company drivers: the hard truth
A W-2 company driver generally cannot deduct per diem on their personal return. Unreimbursed employee business expenses are not deductible for federal income tax purposes under current law — the miscellaneous itemized deduction that used to carry them is suspended.
That is a real change from how things worked before 2018, and drivers who remember deducting meals, gear, and phone costs are sometimes still trying to.
The route that remains open is on the carrier's side: an accountable per diem reimbursement plan, where the carrier pays a portion of the driver's compensation as a non-taxable per diem reimbursement rather than as wages. That is worth asking your carrier about, though it is worth understanding that it reduces reported W-2 wages, which can affect Social Security credits, and loan and mortgage qualification.
Owner-operators filing Schedule C, or through a partnership or S-corporation, are in a completely different and much better position.
What you need to keep
Using the per diem rate removes the need for meal receipts. It does not remove the need to substantiate time, place, and business purpose.
What that means practically is a record of the days you were away from your tax home overnight. Your logs or ELD records generally establish this, and they are the strongest evidence available because they were created contemporaneously for another purpose entirely.
What we recommend on top of that is a simple day count — a calendar or spreadsheet noting nights out, maintained through the year. It takes seconds a day, it reconciles against your ELD data, and it turns a potentially contentious examination item into a five-minute conversation.
Your tax home
One complication worth flagging. Per diem requires being away from your tax home, which is generally your regular place of business or, if you have none, your regular abode. Drivers without a permanent residence — who live in the truck full time and use a relative's address for mail — can find they have no tax home at all, in which case they are never "away" from it and per diem is unavailable.
This is a real issue for a small number of drivers and it is worth addressing deliberately if it describes you.
If you are an S-corporation
An owner-operator who has elected S-corporation treatment is an employee of their own corporation, and the employee rule above applies to them too. The corporation needs an accountable plan to reimburse per diem, and the reimbursement has to follow the plan's requirements.
Set up correctly, this works fine. Set up by nobody, which is the usual case after a DIY S-corp election, the per diem simply does not get claimed — one of several reasons an S-corp election made too early can cost more than it saves.
What to do
Count your nights out. Apply the partial-day rule at each end of every trip. Keep the day log alongside your ELD records. And if you are running local and have been claiming per diem, get that corrected before it gets corrected for you.
We handle per diem substantiation, owner-operator returns, and entity analysis for drivers across Texas. More on trucking tax services.