06/04/2026
If you're self-employed or own a business and use your car for work, a portion of those vehicle expenses may be deductible. The IRS allows business owners to deduct costs tied to the business use of a vehicle, but only the portion attributable to business miles, not personal driving.
There are two methods for calculating the deduction. The first is the actual expense method, which adds up the real costs of operating the vehicle: gas, oil, insurance, repairs, registration fees, lease payments, and depreciation. The second is the standard mileage rate, a per-mile rate set by the IRS each year that's designed to reflect fuel and operating costs in a simplified way. If you own the vehicle and want to use the standard mileage rate, the IRS requires that you use it in the first year the vehicle is placed in service for business.
The standard mileage rate is set by the IRS and updated annually, so the current figure should always be confirmed before filing. A tax professional can pull the current rate and help you determine which method produces the better deduction for your situation.
If you mix business and personal use of a vehicle, keeping a mileage log throughout the year is the most reliable way to support the deduction at filing time.
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This information is not a substitute for individualized tax advice. Please consult a qualified tax professional to discuss your specific situation. Tip adapted from IRS.gov.