Yes, you can deduct both vehicle expenses and depreciation on your taxes, but strictly limited to the percentage of business use. Personal use portions are never deductible. The core principle is allocation: if a vehicle is used 70% for business and 30% personally, you can only claim 70% of total operating costs and eligible depreciation.
The deduction operates under specific IRS guidelines (or equivalent tax authority rules in other jurisdictions). You typically choose one of two methods: the Standard Mileage Rate or the Actual Expense Method. You cannot claim depreciation if you use the Standard Mileage Rate, as a depreciation component is already built into the per-mile rate. For the 2024 tax year, the standard business mileage rate is 67 cents per mile. The Actual Expense Method allows you to deduct the business-use percentage of all actual costs—fuel, insurance, repairs, lease payments, and depreciation.
Depreciation under the Actual Expense Method follows specific rules. For a vehicle placed in service for business in 2024, the IRS sets annual depreciation limits. Using the Modified Accelerated Cost Recovery System (MACRS), depreciation is calculated on the vehicle's cost basis. However, annual deductions are capped. For a new car, the first-year depreciation deduction limit is $20,400, with subsequent year limits applied. You deduct the business-use percentage of this calculated amount.
For example, if you purchase a vehicle for $50,000 and use it 80% for business, your depreciable base is $40,000 (80% of $50,000). In the first year, you may deduct the lesser of the calculated MACRS amount on $40,000 or 80% of the $20,400 limit ($16,320). This process continues over the asset's recovery period, typically five years.
A critical distinction is between tax depreciation and actual market value loss. Tax deductions follow statutory schedules and caps, which often differ from a vehicle's real-world resale value decline. This is a common point of confusion. The deduction is a tax accounting benefit, not a reimbursement for actual economic loss.
Accurate mileage logging is non-negotiable for substantiating business use. The IRS requires contemporaneous records—a logbook or digital tracking app—detailing dates, miles, destinations, and business purposes. Without this, the entire deduction is at risk during an audit. Commuting from your home to a regular workplace is considered personal use, not business.
Common errors include claiming 100% business use for a vehicle also used for family errands, mixing methods improperly (e.g., switching from Standard Mileage to Actual Expenses without following rules for a leased vehicle), and failing to reduce the vehicle's cost basis by any Section 179 deduction or bonus depreciation taken in prior years. Consulting a tax professional is advised for complex situations involving high-cost vehicles or intensive business use.
