Vehicle & Mileage Deductions for Contractors (2026)

For most contractors, the vehicle is one of the largest ongoing business expenses. Trucks, vans, and work vehicles are essential — and how you deduct them can meaningfully change your tax bill. The IRS gives you two methods: the standard mileage rate and the actual expense method. Picking the right one, and keeping records that hold up, is where the money is.

The Two Methods

1. Standard mileage rate

You multiply your business miles by a per-mile rate the IRS sets each year. That rate is built to cover the whole cost of operating the vehicle — depreciation, gas, insurance, maintenance. It's simpler and needs less expense detail, but you still have to track business miles accurately.

2. Actual expense method

You deduct the business-use percentage of your real vehicle costs:

• Gas and oil
• Repairs and maintenance
• Insurance
• Registration and licensing
• Depreciation (or lease payments)
• Tires and other operating costs

Which Is Better for a Contractor?

No single answer — it depends on the vehicle and how you drive it.

• You want simplicity and less expense recordkeeping
• The vehicle is relatively fuel-efficient / lower operating cost
• You drive a lot of business miles
• You prefer one straightforward calculation a year

• You run a high-cost vehicle (heavy-duty truck, high insurance, real repair bills)
• You can document a high business-use percentage
• You want to claim §179 or bonus depreciation on the vehicle
• Your real costs clearly beat what the mileage rate would give you

Rules That Trip People Up

• The first-year choice locks you in. To keep the option of standard mileage in later years, you generally must use it in the first year the vehicle is in service. Use the actual expense method with depreciation first, and you usually can't switch that vehicle back to standard mileage. (Start on standard mileage and you keep flexibility — though a later switch to actual requires straight-line depreciation.)
• Only the business share counts. Personal miles aren't deductible under either method, so an accurate mileage log is essential.
• S-Corp / entity ownership matters. If the company owns the vehicle, costs are handled at the entity level. If you own it personally and use it for the business, an accountable plan (Treas. Reg. §1.62-2) reimbursement is usually the clean way to get the deduction without creating taxable income.
• Substantiation is not optional. Vehicles are "listed property," so IRC §274(d) requires contemporaneous records — date, business purpose, and miles for each trip. A mileage app or a written log both work if they're consistent and complete.

Common Mistakes

• No proper mileage log
• Claiming 100% business use when there's personal driving
• Switching methods incorrectly after year one
• Mixing personal and business costs with no clear documentation
• Leaving out allowable actual expenses — or deducting non-deductible ones

How KDM Accounting Services Helps

Choosing and documenting the right method can save — or cost — real money. We help Florida contractors and owner-operator truckers:

• Compare standard mileage vs. actual expenses for the specific vehicle and situation
• Set up simple, IRS-compliant mileage tracking
• Keep deductions defensible under an IRS review
• Handle vehicle costs correctly inside an S-Corp or other entity
• Fold vehicle purchases and depreciation into overall tax planning

Get the Most from Your Vehicle Deductions

Vehicle costs are a major line item for most contractors, and a little planning — the right method, solid records, the 2026 rate split handled correctly — improves the outcome year after year. If you're unsure you're using the best method, or your records wouldn't hold up under IRS scrutiny, now's the time to get clarity. Contact KDM Accounting Services and we'll review your vehicle expenses and make sure mileage and actual costs are handled the right way.