Mileage vs Actual Expenses: How to Deduct a Business Vehicle

By Tom, CPA · Updated October 27, 2026

Part of: Tax Planning

TL;DR: For 2026, business mileage is 72.5 cents per mile through June and 76 cents from July. Actual expenses can win for pricey or heavy vehicles. Choose mileage in year one to keep the option to switch later.

Educational only, not tax, legal, or investment advice. Examples are illustrations, not predictions. Rules and limits change; verify current figures and talk to a qualified professional about your situation.

Every car used for business faces an existential question once a year: are you a simple creature measured in miles, or a complex machine of gas receipts, insurance bills and depreciation tables? The tax code is 4 million words long; you need about 400 of them to pick between the standard mileage rate and actual expenses, and the choice you make in the first year can lock you in for the life of the car.

This comparison covers the 2026 mileage rates (including the July increase), what actual expenses include, the first-year lock-in rule, the heavy SUV angle and the logs you need either way. It applies to self-employed people, landlords and business owners. W-2 employees generally cannot deduct unreimbursed vehicle expenses on their federal return. Figures are as of Oct 2026.

CPA Warning Label: Big first-year vehicle write-offs require over 50% business use and come back as recapture if use drops or you sell. Keep a contemporaneous log.

The standard mileage rate

The IRS business standard mileage rate for 2026 changed mid-year:

You multiply business miles in each period by that period's rate. The rate is meant to cover gas, maintenance, insurance, registration and depreciation. You can still deduct business parking and tolls separately, and the business portion of interest on a car loan if self-employed. Personal property taxes on the vehicle are handled separately too.

Part of each mile counts as depreciation and reduces your basis in the car: 35 cents per mile for 2026, per IRS Notice 2026-10. That matters when you sell.

The 2027 rate had not been announced as of Oct 2026. The IRS usually announces the next year's rates in December.

Actual expenses

With the actual method, you total the car's real operating costs and multiply by the business-use percentage (business miles divided by total miles):

• Gas and oil
• Repairs, tires and maintenance
• Insurance
• Registration and license fees
• Lease payments (with an inclusion amount for pricier cars) or depreciation if owned
• Loan interest (business share, for self-employed)
• Garage rent, parking and tolls

Depreciation for passenger autos is capped by the Section 280F "luxury auto" limits, which the IRS updates annually. Bonus depreciation, restored to 100% for qualifying property acquired after January 19, 2025 by the 2025 law, can add to the first-year cap, but the 280F ceiling still applies to passenger vehicles. Look up the current year's limits in IRS guidance before relying on a number.

Actual expenses tend to win for expensive vehicles, high-cost-to-operate trucks, cars with high business use but relatively few miles, and vehicles bought with large first-year depreciation in mind. Mileage tends to win for efficient cars driven many business miles.

The first-year lock-in

The most important rule in this comparison: if you want to use the standard mileage rate for a car you own, you must choose it in the first year the car is used for business. After that, you may switch between mileage and actual expenses in later years, but if you switch to actual, you must use straight-line depreciation for the remaining life.

The reverse is stricter. If you use actual expenses with accelerated depreciation (MACRS, Section 179 or bonus) in the first year, you can never switch that car to the standard mileage rate.

For leased cars, choosing the standard mileage rate means using it for the entire lease period, including renewals.

You also cannot use the standard rate if you operate five or more cars at the same time (a fleet), or after claiming Section 179 or bonus depreciation on that car.

Practical takeaway: in year one, mileage keeps your options open. Actual expenses with accelerated depreciation close the door. Run both before filing that first year.

The heavy SUV angle

Vehicles with a gross vehicle weight rating above 6,000 pounds are not subject to the passenger auto depreciation caps. That is the source of the internet's favorite tax "hack": buy a large SUV or truck, write off most of it in year one. Some realities:

• Section 179 on SUVs is capped at $32,000 for 2026, per Rev. Proc. 2025-32. Bonus depreciation can cover the rest, when available.
• Business use must exceed 50% to use Section 179 or bonus depreciation on listed property. If business use later drops to 50% or less, excess depreciation is recaptured as income.
• Selling the vehicle later produces ordinary income recapture of the depreciation taken.
• You still bought a $70,000 vehicle. A 100% write-off at a 24% bracket returns roughly a quarter of the price. The other three quarters are still your money.

If you genuinely need a truck for the business, the rules are generous. If you are buying it for the deduction, that is backwards.

Logs: no log, no deduction

Vehicles are "listed property" with strict substantiation rules. For every business trip, record the date, destination, business purpose and miles, ideally at or near the time of the trip. Also record the odometer at the start and end of the year to show total miles. An app that tracks automatically works; a reconstruction from memory in April does not impress anyone.

Under actual expenses, you also need receipts for every cost you claim, plus the purchase documents for depreciation. Under the standard rate you skip the gas receipts, but you still need the mileage log, and you still need parking and toll receipts if you deduct those separately. Either way, a simple habit beats a heroic April reconstruction: log trips weekly, total them monthly and save the year-end odometer photo.

Commuting from your home to a regular workplace is personal. Trips from a home office that is your principal place of business to clients, suppliers or job sites are generally business. Landlords driving to rentals should read landlord mileage and travel.

Which method fits which driver

The table is a rule of thumb, not a verdict. The only reliable answer comes from running both methods with your real numbers, and in year one, thinking about which door you want to leave open.

Selling or trading the car

Both methods reduce the car's tax basis. Under the standard rate, each business mile reduces basis by the depreciation component (35 cents for 2026, and different amounts in earlier years). Under actual expenses, the depreciation you claimed reduces basis directly.

When you sell a business vehicle, gain up to the depreciation claimed is generally taxed as ordinary income. A loss on the business portion may be deductible. Trade-ins are no longer tax-deferred like-kind exchanges for vehicles; since 2018, Section 1031 applies only to real property, so a trade-in is treated as a sale plus a purchase.

Keep the purchase paperwork, every year's business-use percentage and your depreciation history. When the car finally retires, you will need all three to compute the gain correctly.

One more cost to remember: the personal miles. A car used 60% for business is still 40% personal, and no method makes that portion deductible. The cheapest car to deduct is often the one you already own.

Illustration: mileage vs actual

Riley, a self-employed consultant, drove a paid-off sedan 15,000 total miles in 2026, of which 9,000 were business (60%), split 4,500 in each half of the year. Actual costs: gas $2,100, insurance $1,500, maintenance $800, registration $300. Straight-line depreciation available: $2,400.

Mileage wins by about $2,400. Now imagine a $65,000 truck used 80% for business with 6,000 business miles. Mileage would be about $4,455; actual with first-year depreciation could be many times that, subject to the caps and recapture discussed above. Illustrative only.