Owner-operator deductions, and the trap in the biggest one

The single most valuable deduction available to an owner-operator is also the one with a trap attached that can wipe it out entirely. Start there, then work down the list.

Per diem: the big one

Drivers subject to DOT hours-of-service rules get a special meals-and-incidentals allowance. Instead of saving every receipt from every truck stop, you deduct a flat daily amount for each day you're away from home overnight.

Rate effective October 1, 2025 through September 30, 2026. Most taxpayers get 50% on meals; DOT-regulated drivers get 80% by statute.

Run 280 nights out and that's roughly $17,900 in deductions from a rule most people apply carelessly or not at all.

One consistency requirement: if you use the special transportation rate for any trip in a year, you must use it for all trips that year. You can't cherry-pick per diem on some trips and actual receipts on others.

Also worth knowing: company drivers on a W-2 cannot deduct per diem or any unreimbursed expenses. That deduction was suspended and the suspension is now permanent. Only self-employed owner-operators filing Schedule C, and lease-purchase contractors, can take it. This is the most persistent confusion in trucking tax, and it's why advice from a company driver at the fuel desk is often wrong for you and vice versa.

Why you can't use the standard mileage rate

You'll see the standard mileage rate quoted everywhere — 72.5 cents a mile for 2026. It does not apply to your tractor, and the reason usually given for that is wrong.

It's not a weight rule. There are three actual reasons:

• Vehicle type. The standard mileage rate exists for "automobiles, including vans, pickups, or panel trucks." A sleeper tractor is none of those.
• Depreciation disqualifiers. You can't use the mileage rate on a vehicle where you've claimed Section 179, bonus depreciation, or MACRS — which is essentially every financed tractor.
• First-year lock-in. The mileage method has to be chosen in the first year the vehicle is placed in service. Take depreciation in year one and you're permanently barred from mileage on that vehicle.

So you use actual expenses on the truck, which is fine — it's almost always the larger deduction anyway. The mileage rate may still matter for a personal pickup you use for business errands.

Two rules that work in your favor because of the truck's weight: the luxury-auto depreciation caps don't apply to vehicles used to transport property for hire, and a cargo vehicle over 14,000 lbs isn't "listed property," so you don't have to log business-versus-personal use on it.

Depreciating the truck

An over-the-road tractor is 3-year property under MACRS. Trailers are 5-year. That short recovery period on the tractor is unusually favorable.

On top of that, for 2026:

• Bonus depreciation is 100% and permanent for property acquired after January 19, 2025 — new or used. No dollar cap, and unlike Section 179 it can create a loss.
• Section 179 allows up to $2,560,000, phasing out above $4,090,000 of property placed in service. Far above anything a single-truck operation will hit — but note §179 is capped at your business taxable income, which is a real constraint for a one-truck business.

The SUV limit you'll see mentioned ($32,000) applies to vehicles rated at 14,000 lbs or less. It does not touch a Class 8 tractor.

Whether to take the full deduction in year one or spread it out is a real strategic question — a huge deduction in a low-income year can waste itself. That's a conversation for your accountant, not a rule of thumb.

Deductions people miss

Off the truck — usually the biggest misses

• Half of your self-employment tax. An above-the-line adjustment. Automatic if the return is done right, routinely missed by self-preparers.
• Self-employed health insurance for you, your spouse, dependents, and any child under 27. Note it doesn't reduce self-employment tax, and it's disallowed for any month you were eligible for an employer plan through a spouse.
• The qualified business income deduction — up to 20% of business income, now permanent. Trucking isn't a restricted service trade, so it's available.
• Retirement contributions. A solo 401(k) or SEP-IRA allows very large deductible contributions — the total annual addition limit for 2026 is $72,000. This is the largest lever most profitable owner-operators never pull.
• Home office for the space where you do dispatch, invoicing, and records — if it's used exclusively and regularly for that. Frequently skipped by OTR drivers who assume it can't apply to them.
• Startup costs, accounting and tax prep fees.

On the truck

Insurance of every kind; Form 2290; IFTA, IRP and base plates; permits; drug and alcohol consortium fees; ELD subscriptions and the business share of your phone; load board, dispatch and factoring fees; broker and lumper fees; scales and tolls; truck washes; APU and idle-reduction equipment; sleeper equipment like an inverter, refrigerator and bedding; chains, straps, tarps and load locks; required gear such as gloves, steel-toe boots and hi-vis; tools; bank fees and interest on the truck loan; showers and laundry on the road; OOIDA dues and trade publications; CDL renewals and endorsements; your DOT physical.

What is not deductible

• Commuting from home to the terminal
• Everyday clothing, even if you only wear it for work
• Income you lost on deadhead or unpaid miles — that's revenue you never earned, not an expense
• "Lost revenue" while the truck was down. The repair is deductible. The downtime isn't.
• The personal share of your phone plan
• Actual meal receipts in addition to per diem — pick one method

What you have to keep

Three years is the general rule, but there are important exceptions: six years if you under-report income by more than 25%, and indefinitely if you never file.

Records for the truck itself — purchase documents, financing, improvements, depreciation schedules — have to survive for the entire time you own it plus the limitations period on the year you sell it. In practice that's often seven to ten years.

For travel expenses you need four things: amount, time, place, and business purpose. For per diem specifically, the practical record is a day-by-day log of nights away from home, with departure and return dates so the 75% partial-day rule can be applied. Your HOS logs and settlement statements are the natural corroboration, and an examiner will ask for them.

Receipts are required for any lodging expense and any other expense of $75 or more. Below that a written log can suffice — but a photo of the receipt costs nothing and removes the argument.

This guide is general information, not tax advice. Tax rules change and interact with your specific circumstances. AxleVault is bookkeeping software, not a tax advisor — talk to a professional who knows trucking before you file.

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