
Yes, you can write off car as a business expense, but only for the portion of your vehicle's use that is directly for business. The IRS does not allow a deduction for personal use. The key is meticulously tracking your business mileage to calculate the exact percentage of business use.
To claim the deduction, you must use your car for legitimate business activities. Commuting from your home to your regular workplace is considered personal use and is not deductible. Qualifying business use includes driving to a temporary work location, visiting clients, or traveling between job sites.
There are two primary methods for deducting vehicle expenses, including insurance:
1. Standard Mileage Rate Method This method is often simpler. You track your business miles and multiply them by the standard rate set by the IRS (for 2023, it's 65.5 cents per mile). This single rate covers all vehicle costs—gas, insurance, depreciation, and maintenance. You cannot separately deduct your insurance premium if you use this method.
2. Actual Expense Method This method requires more record-keeping but can yield a larger deduction if you have high expenses. You total all actual car costs for the year—insurance, gas, oil, repairs, tires, registration fees, and depreciation. Then, you multiply the total by your business-use percentage (business miles / total miles).
| Expense Category | Total Annual Cost | Business Use Percentage (60%) | Deductible Amount |
|---|---|---|---|
| Car Insurance Premium | $1,200 | 60% | $720 |
| Gas and Oil | $2,500 | 60% | $1,500 |
| Repairs and Maintenance | $800 | 60% | $480 |
| Depreciation | $3,000 | 60% | $1,800 |
| Total Deduction | $4,500 |
Keeping a detailed logbook, either a physical notebook or a digital app, is non-negotiable for substantiating your deduction in case of an audit. Choose the method that provides the largest deduction for your situation, but you must generally use the standard mileage rate in the first year the car is placed in service.

As a real estate agent, my car is my office on wheels. I absolutely write off my . I use the standard mileage rate because it's easy—I just log every mile to showings, listings, and closings. My accountant handles the rest. The trick is being consistent with that log. Mixing in personal errands? That part doesn't count, so I'm careful to track it all.

The deduction is contingent on substantiated business use. If you're self-employed and file a Schedule C, you can deduct the business percentage of your premium using the actual expense method. Alternatively, the standard mileage rate inherently includes an insurance component. The critical factor is contemporaneous mileage documentation. Commuting is not deductible, but travel between business locations is. The method that yields the greater tax benefit should be selected.

I started driving for a delivery app last year, and my tax guy asked about my car . I had no idea I could deduct part of it! Now I use an app on my phone that tracks my miles automatically when I'm on the clock. At tax time, it spits out a report. I used that to deduct a big chunk of my insurance and gas. It really helped my bottom line. Just keep your personal and work miles separate.

Don't just guess at this. The IRS expects you to have solid records. If you use your car for business, start a log today. Note the date, miles driven, and the business purpose for every trip. This log is your proof for deducting and other costs. Without it, you could lose the deduction entirely if you're audited. It’s not just about saving money now; it’s about protecting yourself from problems later. An hour of organization can save a major headache.


