How trucker per diem actually works in 2026
Per diem is not a payment and not a credit. It is a way of measuring one specific business expense — the meals and incidental costs of being away from home overnight — without keeping every receipt. Instead of adding up what you actually spent on food, you count the days you were away and multiply by a flat federal rate. The IRS publishes a special transportation-industry rate for workers whose jobs keep them moving, and that is the rate this calculator uses.
Under IRS Notice 2025-54, effective October 1, 2025, that rate is "$80 for any locality of travel in the continental United States" and "$86 for any locality of travel outside the continental United States." A separate incidental-expenses-only rate is "$5 per day." Those three figures are the only starting numbers on this page. Everything below is arithmetic applied to them, or a condition you have to meet before the arithmetic means anything.
Who can claim it, and who cannot
This is the part that changed, and it is the part most pages still get wrong.
If you are an owner-operator — self-employed, business income and expenses reported on Schedule C — per diem is an ordinary business expense. It reduces net business profit the same way fuel and tires do. That is the situation this calculator models.
If you are a company driver paid on a W-2, you generally cannot deduct it on your federal return at all. Unreimbursed employee travel was a miscellaneous itemized deduction. The 2017 tax law suspended that entire category starting with the 2018 tax year, and the 2025 tax law (OBBBA) made the disallowance permanent instead of letting the suspension expire. Narrow categories can still file Form 2106 — Armed Forces reservists among them — and those categories do not ordinarily include truck drivers. Several states never conformed to the federal change, so a state return can behave differently from the federal one. That is a question for someone who prepares returns in your state.
Which of those two paragraphs applies to you depends on how your income is actually reported, not on what your settlement statement or your recruiter calls you. Lease-purchase arrangements in particular can land on either side, and a driver who switched mid-year can have both in the same tax year.
For W-2 drivers the live question is your carrier's per diem pay plan, which is a payroll structure, not a deduction. Under a compliant accountable plan — business connection, substantiated travel, excess amounts returned — the employer's per diem payments are excluded from your taxable wages rather than claimed on your return. An allowance handed out with no substantiation requirement is ordinary taxable pay under a nicer name. And because accountable-plan per diem is excluded from wages, it does not appear as wages anywhere else either: your reported earnings are lower, along with anything else computed off that figure. Ask your carrier whether their program is an accountable plan, and ask what it does to your reported wages, before you enroll.
What "away from home" has to mean
The deduction covers travel away from your tax home, and only when the trip is long enough to require sleep or rest. Both conditions do real work, and neither is about mileage.
Your tax home is your regular place of business or post of duty — not automatically the house you own. A driver with no fixed base, who neither maintains a regular residence nor works out of a regular location, can be treated as itinerant, and an itinerant taxpayer is never considered away from home, because there is no home to be away from. The rest requirement is separate: a long turn that puts you back in your own bed the same night is not travel away from home, however many hours or miles it took. That is the distinction the calculator's day counts assume you have already applied.
Full days, partial days, and the ¾ rule
Days in the middle of a trip are full days at the full rate. The first and last day of a trip are not. Publication 463 is direct about it: "For both the day you depart for and the day you return from a business trip, you must prorate the standard meal allowance (figure a reduced amount for each day)."
It then offers a choice of method. The simple one is a fixed fraction — "You can claim 3/4 of the standard meal allowance" — which is $60 instead of $80 on a continental U.S. day, and $64.50 on a day outside CONUS. The alternative is broader: "You can prorate using any method that you consistently apply and that is in accordance with reasonable business practice." The operative word is consistently. Choose a method and hold to it, rather than picking whichever produces the larger figure on a given trip. This calculator uses the ¾ method.
Count travel days, not driving days. A day sitting at a receiver waiting on a door is still a day away from home. A day at your house between trips is not, even if you spent it on paperwork.
Why drivers get 80% and most workers get 50%
Business meal expense is generally limited to half its cost. The tax code writes a different percentage for one group: under IRC §274(n)(3), an individual subject to the Department of Transportation's hours-of-service limits deducts 80% rather than 50%. If your driving is governed by those HOS rules, 80% is the fraction that applies to the meal portion. The calculator asks about this directly because it is the single largest lever in the result, and because it is a statutory test — DOT hours-of-service limits — not a judgment call about how hard your week was.
The $5 incidentals-only rate is a separate election, for days you incur no meal costs or days you are deducting actual meal receipts instead. For any given day it is one or the other — never both — and it is not reduced by the 80% limit, because incidentals are not a meal expense.
CONUS, OCONUS, and the October 1 boundary
CONUS means the continental United States. OCONUS is everything outside it, which for most drivers means Alaska, Hawaii, or a run into Canada. The transportation-industry figure is a single flat rate on each side of that line: you do not look up the town you shut down in. That is the whole convenience of the method, and it is why the calculator asks only how many days fell on each side.
These rates run on the federal fiscal year, which is why the current ones took effect on October 1, 2025 rather than in January. A calendar tax year therefore straddles two notices. This page applies the current rates across every day you enter, including days on or after October 1, 2026; if a later notice changes the figures, the final quarter of 2026 is the part of your year that moves. The notice number and the review date are printed above the calculator so you can tell at a glance how current the numbers are.
Per diem is not the mileage rate
These two get mixed up constantly, and they are unrelated. The IRS standard mileage rate is a method for deducting the cost of operating an automobile for business. It is not a heavy-truck figure, and it does not describe anything about meals. Per diem covers food and incidentals while you are away overnight; your truck's operating costs — fuel, maintenance, insurance, depreciation, tolls, permits — are tracked and deducted separately, on their own actual amounts. Claiming a mileage allowance in place of your real tractor expenses is a different mistake entirely, and an expensive one. Our cost-per-mile calculator handles that side of the ledger.
A deduction is not money back
The number this tool produces is an expense figure, not a refund. A deduction reduces the income your tax is calculated on; what it is worth in dollars depends on your other income, your other expenses, and the rest of your return. Two owner-operators with identical trip sheets can end up in very different places. This page will not tell you what your tax outcome is, because it cannot see any of that — it tells you how large the expense is under the rules above.
What has to be behind the number
Using per diem removes the need for meal receipts. It does not remove the need for records. You still have to be able to show the dates you left and returned, where you traveled, and the business purpose of the trip. For a driver most of that evidence already exists — ELD records, settlement statements, trip sheets, fuel purchases that place you somewhere on a given date — but only if you keep it. Count the days honestly as well: days at home, days on vacation, and days sitting in the shop at your home terminal are not days away from home. Amounts your carrier already reimbursed you for are not yours to deduct a second time.
Worked example 2 — with Canada runs: 180 full and 24 partial days in the lower 48, plus 12 full and 4 partial days outside CONUS: (180 × $80) + (24 × $60) + (12 × $86) + (4 × $64.50) = $17,130, then × 80% = $13,704. Both figures come out of the same calculation the button above runs.
What this calculator cannot know
- Whether you have a tax home, or whether you would be treated as itinerant.
- How your income is actually reported — W-2, 1099, or both in one year.
- Whether your carrier's per diem program is a genuine accountable plan.
- Whether your state follows the federal treatment of employee travel.
- Which of your days genuinely required sleep or rest away from home. You enter those.
- Everything else on your return, which is what actually determines the outcome.
It multiplies your day counts by a published rate and applies two published adjustments. That is the entire job. Know the number, then take it to a tax professional who can see the rest of your situation.