Per Diem Deductions for Truckers: The Rate Most Owner-Operators Get Wrong

The per diem deduction lets an owner-operator deduct a standard daily rate for meals and incidental expenses incurred while away from home for work, instead of tracking every individual receipt. The IRS publishes a special per diem rate for transportation workers subject to hours-of-service limits, which is typically higher than the standard rate used for other traveling employees.

In principle, this should be one of the simpler deductions in the entire return — multiply the daily rate by the number of days on the road. In practice, it's one of the most consistently miscalculated, because the number of qualifying days often gets estimated from memory at tax time instead of tracked as it happens.

A day only counts if you were away from your tax home long enough to require rest, consistent with hours-of-service rules — which usually means overnight, multi-day runs count cleanly, but the edges (a long day trip, a partial day at the start or end of a multi-day run) are where owner-operators either overclaim or, far more often, underclaim by rounding down out of caution.

The deduction is also only partially deductible — self-employed transportation workers can generally deduct a percentage of the per diem rate (the allowable percentage has changed in recent years and is worth confirming for the current tax year), not the full daily amount, which is another place a rough estimate tends to drift from what's actually allowed.

The reliable fix is a simple daily log — even a basic calendar note of departure and return dates — kept throughout the year rather than reconstructed in April. Once real, contemporaneous days-on-the-road data exists, recalculating the deduction against it is straightforward, and it's common for that recalculation to materially change the number from what a flat, habitual estimate would have produced.