2021 Tax deduction for qualify business use of vehicles Generally, you can claim vehicle deductions as a business owner or self-employed taxpayer. If you own a business or are self-employed and use a vehicle for business, you may deduct car expenses on your corporate tax return. If a taxpayer uses the car for both business and personal purposes, the expenses must be split. The deduction is based on the portion of mileage used for business. You may deduct vehicle expenses in one of two ways. 1. Actual expenses These include: - a. Depreciation - b. Lease payments - c. Gas and oil - d. Tires - e. Repairs and tune-ups - f. Insurance - g. Registration fees Your deduction for actual expenses is based on the percentage of business use. If for example you use your car 80% for business and drive it 20% personally, you may write off 80% of your qualified expenses. 2. Standard mileage rate Taxpayers who want to use the standard mileage rate for a car they own must choose to use this