Can you write off a car for business? The answer depends on who owns the vehicle, how it is used, whether the miles are business or personal, and whether you use the standard mileage rate or the actual expense method.

For 1099 contractors, CRNAs, locum tenens providers, and small business owners, the real question is not only “Can you claim your car on taxes?”. The better question is whether your business use is properly documented and whether the vehicle treatment matches your tax structure. Vehicle expenses may support valuable CRNA tax deductions, but they need to be handled carefully.

Can You Write Off a Car for Business?

Yes, business owners and self-employed individuals may deduct car expenses tied to business use. However, if you use the vehicle for both business and personal driving, you can only deduct the business-use portion.

For example, if 70% of your total vehicle use is for business, you can generally only claim that portion of eligible vehicle expenses. Personal use doesn’t become deductible just because you also use the vehicle for work.

You also need records to support the deduction. Mileage logs, receipts, reimbursement records, and notes about business purpose all help show how you used the vehicle. Keep in mind that the IRS generally treats daily commuting as personal use, not business use.

What Counts Business Use of a Vehicle? 

Business use generally includes driving that is ordinary and necessary for your trade or business. The IRS guidance on the business use of a car explains that these expenses must be strictly tied to business activity, not personal driving. Qualifying business mileage may include:

• Standard Business Travel: Driving between work locations, visiting clients or facilities, going to business meetings, driving to vendors, or attending conferences. 

• Contractor & Locum Tenens Travel: Driving to temporary contract assignments, business meetings, credentialing appointments, or other work-related locations. 

• Parking and Tolls: Business-related parking fees and tolls connected to qualifying business travel (which are deductible in addition to your standard mileage). 

Company Car vs. Personal Vehicle: What Is the Difference? 

You may still generate a business vehicle deduction from a personal vehicle if you use it for business. The owner must track business mileage, total mileage, and the percentage of business use. 

A company-owned vehicle works differently because the business treats the vehicle as an asset. This can affect depreciation, bookkeeping, reimbursements, payroll reporting, and personal-use tracking. 

If an employee or owner-employee uses a company vehicle personally, that personal use may need to be treated as taxable wages or a taxable fringe benefit. This is why company car vs personal vehicle decisions should be reviewed before buying, leasing, or transferring a vehicle into the business. 

Standard Mileage Rate vs. Actual Expense Method 

Taxpayers generally cannot deduct both standard mileage and actual expenses for the same vehicle use. Because you must choose one, you should compare both methods before making a decision: 

• The Standard Mileage Rate: Uses a set cents-per-mile amount for all business miles driven. For the first half of 2026, the IRS business standard mileage rate is 72.5 cents per mile, increasing to 76 cents per mile for travel on or after July 1, 2026. 
   

• The Actual Expense Method: Uses the business-use portion of your real, out-of-pocket vehicle costs. Eligible expenses may include fuel, insurance, repairs, maintenance, lease payments, depreciation, and registration fees. 

Can You Write Off Car Lease Payments for Business?

Yes, business car lease payments may be deductible under the actual expense method. However, if you use the leased vehicle for both business and personal driving, you can only deduct the business-use portion.

For example, if you use a leased vehicle 80% for business. The deductible lease amount generally depends on that business-use percentage. Don’t treat full lease payments as deductible unless you truly use the vehicle 100% for business. Additionally, your records should support it. 

If a taxpayer uses the standard mileage rate for a leased car, IRS Publication 463 explains that the method generally must continue for the entire lease period, including renewals. 

Parking, Tolls, and Reimbursements: What Should Owners Track?

You may be able to deduct business-related parking fees and tolls when they tie to qualifying business travel. However, parking at a main workplace or commuting-related parking expenses may be personal. 

You should also track mileage reimbursement separately. This matters for S-Corp owners because reimbursements, wages, and personal use of a company vehicle may have different tax treatment. 

Vehicle Deductions for S-Corp Owners 

S-Corp vehicle deductions are more complex than sole proprietor deductions. Owner-employees may need accountable plan treatment for reimbursements. Personal use of a company vehicle may also need to be included in wages. 

Mileage, reimbursements, payroll, and bookkeeping should match. A clean S-Corp vehicle deduction strategy should show who owns the vehicle, how the vehicle is used, how the owner is reimbursed, and whether any personal use was reported correctly. 

How 1099 Accountant Helps With Vehicle Deduction Planning

Vehicle deductions can reduce taxable income. But only when business use, ownership, mileage, expenses, reimbursements, and payroll treatment are handled correctly. 

1099 Accountant helps CRNAs, locum tenens providers, 1099 contractors, and S-Corp owners organize their books, review business vehicle deductions, and plan tax strategy with better records. 

If you are deciding whether to use a personal vehicle, lease a car, buy a used car, or place a vehicle under the business, our tax advisory for 1099 contractors can help you review the numbers before the decision affects your tax return. 

Schedule a consultation or contact us at (855) 529-1099 today.