Car payments are not deductible for personal use, but they may be deductible if you use the car for business

If you drive a car for your job as an employee, you cannot deduct the car payment itself. The IRS does not allow you to write off loan or lease payments for a vehicle you use personally, even if part of that use is work-related.

However, if you are self-employed or own a business and use a car for business purposes, you have two ways to deduct car expenses: the standard mileage rate or the actual expense method. Under either approach, you track and deduct the business portion of your driving, but the rules differ in how you calculate what you owe.

Key Takeaways

  • Car payments themselves are never deductible, whether you are an employee or self-employed.
  • Self-employed people and business owners can deduct car expenses using either the standard mileage rate or actual expenses, but only for the business portion of miles driven.
  • The standard mileage rate is simpler: you multiply your business miles by the IRS rate (which changes yearly) and deduct that amount.
  • The actual expense method lets you deduct depreciation, fuel, insurance, repairs, and registration, but requires detailed record-keeping and you cannot deduct the principal on a loan.
  • You must choose one method for the first year you use the car for business and can switch methods in later years, though switching has tax consequences.

Why the car payment itself does not count

A car payment is a loan repayment, not a business expense. When you pay your lender, part of that payment goes toward interest and part toward the principal (the amount you borrowed). The IRS treats the principal as you getting your own money back, not as a cost of doing business.

The interest portion of your car payment may be deductible in some cases, but only if the loan is for a business vehicle and you itemize deductions on your tax return—and even then, the rules are narrow. Most self-employed people find it simpler to use one of the two standard methods instead of trying to separate interest from principal each month.

The standard mileage rate method

The standard mileage rate is the simpler path for most self-employed people. Each year, the IRS sets a rate (measured in cents per mile) that you multiply by the number of business miles you drove. For 2024, the rate is 67 cents per mile for business use. You do not deduct the car payment, fuel, insurance, or repairs separately—the mileage rate is meant to cover all of those costs combined.

To use this method, you need a mileage log. Write down the date, destination, business purpose, and miles driven for each business trip. You do not need to log personal miles, but you do need to be able to show the IRS how many business miles you drove if you are audited. Many people use a notebook, a mileage app on their phone, or a spreadsheet.

The standard mileage rate method works best if you drive a modest number of business miles each year or if your car is older and has high mileage. You can switch to the actual expense method in a later year if your situation changes, though you will owe depreciation recapture tax on the difference between what you deducted and what the car actually depreciated.

The actual expense method

The actual expense method lets you deduct the real costs of operating the car, but only for the business portion. You add up all your car expenses for the year—fuel, insurance, repairs, registration, depreciation—then multiply by the percentage of miles that were business miles.

For example, if you drove 12,000 business miles and 3,000 personal miles (15,000 total), you would deduct 80 percent of your actual expenses. If your total car costs were $6,000, you would deduct $4,800. Depreciation is calculated using IRS rules and depends on when you bought the car, what you paid, and how much it has declined in value.

This method requires detailed record-keeping: receipts for fuel, insurance, repairs, registration, and loan or lease documents. You also need the same mileage log as the standard method to prove the business percentage. The actual expense method often yields a larger deduction than the standard mileage rate, but only if your car costs are genuinely high—older cars with expensive repairs, or cars you bought new and are depreciating quickly.

How to choose between the two methods

In the first year you use a car for business, you can choose either method. If you choose the standard mileage rate, you can switch to actual expenses in any later year. If you choose actual expenses, you can switch back to the standard mileage rate only if you did not claim depreciation in the previous year—and even then, the IRS limits how you can switch back.

Most people start with the standard mileage rate because it is simpler and does not require itemizing every expense. Switch to actual expenses only if you have high car costs (major repairs, a new car with steep depreciation, or very high insurance premiums) and you are willing to keep detailed records.

Employees cannot deduct car expenses

If you are an employee and drive your own car for work, you cannot deduct those expenses on your tax return. This is true even if your employer does not reimburse you and you drive a significant amount for your job. The Tax Cuts and Jobs Act of 2017 suspended the employee business expense deduction through 2025.

Your only option is to ask your employer for reimbursement. If your company has an accountable plan—a formal policy that requires you to submit receipts and return any overpayment—the reimbursement is not taxable income. If your employer reimburses you without requiring documentation, that money counts as taxable wages.

Record-keeping and what the IRS expects

Whether you use the standard mileage rate or actual expenses, the IRS expects a contemporaneous mileage log. "Contemporaneous" means you write it down at or near the time you drive, not weeks or months later from memory. A straightforward notebook works: date, starting odometer reading, ending odometer reading, destination, and business purpose.

Keep receipts for fuel, insurance, repairs, registration, and loan documents for at least three years. If you are audited and cannot produce a mileage log or receipts, the IRS will disallow the deduction. Many people use mileage-tracking apps (such as MileIQ, Stride Health, or TripLog) to automate the logging process and reduce the chance of error.

Frequently Asked Questions

Can I deduct a car lease payment if I use the car for business?

No, the lease payment itself is not deductible. However, if you use the car for business, you can deduct the business portion of the lease payment using the actual expense method. You would also deduct fuel, insurance, and repairs for the business percentage of miles driven. The standard mileage rate method is usually simpler and covers the lease payment implicitly.

What if I use my car partly for business and partly for personal use?

You can only deduct the business portion. If you drove 10,000 business miles and 5,000 personal miles in a year, you deduct two-thirds of your car expenses (or use the standard mileage rate for the 10,000 business miles). You must keep a mileage log to prove the split.

Can I deduct interest on a car loan?

Interest on a car loan is not deductible for personal or employee use. If you are self-employed and use the actual expense method, you cannot deduct the interest separately—it is already accounted for in your depreciation calculation. If you use the standard mileage rate, the rate is meant to cover interest implicitly.

Do I have to use the same method every year?

No. You can switch from the standard mileage rate to actual expenses in any year. Switching from actual expenses back to the standard mileage rate is more restricted and may trigger depreciation recapture tax. Consult a tax professional before switching if you have been using actual expenses for more than one year.

What if my employer gives me a car allowance instead of reimbursing mileage?

A flat car allowance is taxable income to you, and you cannot deduct car expenses to offset it. Ask your employer to switch to a mileage reimbursement plan based on actual miles driven, which is not taxable if the employer has an accountable plan in place.