Your Truck or the Company’s? The Vehicle Decision That Shapes Your Tax Bill
By Adam Grilliot, CPA
Partner at SJHL LLC
&
Matt Deutsch, CPA
Partner at SJHL LLC
Picture a business owner who drives 10,000 business miles every year. At 2026 IRS rates, that is more than $7,000 in potential deductions. Should the owner use a personal vehicle and have the business reimburse the mileage? Or should the business buy a vehicle for the owner to drive?
The wrong choice can cost real money, yet most owners handle vehicle deductions on autopilot. Without a plan, you may be leaving money on the table, taking on avoidable audit risk, or both.
Path One: The Business Owns the Vehicle
When a vehicle is titled to the company and used almost exclusively for work, the business pays all operating expenses directly and can use more favorable depreciation without tracking business-use percentages.
However, a deduction rarely makes a poor purchase a good financial decision. Spending $80,000 to get a deduction is still spending $80,000. The best vehicle strategy balances tax savings, cash flow, financing costs and the actual needs of the business.
Depreciation limits apply to many passenger vehicles. Heavier vehicles (generally those with a gross vehicle weight rating above 6,000 pounds) may qualify for larger first-year deductions under Section 179 and bonus depreciation, while lighter vehicles face stricter caps. Before purchasing a vehicle solely for tax purposes, understand how the vehicle’s weight affects the available deduction.
The catch is personal use. Any personal use of a company-owned vehicle is a taxable fringe benefit, reported on the owner’s W-2 and subject to payroll taxes. As a rule of thumb, this path fits best when business use exceeds 90%, the company is an S corporation or C corporation, and the owner plans to take Section 179 or bonus depreciation.
Path Two: You Own It, the Company Reimburses You
If meaningful personal use is expected, a personally owned vehicle is often the cleaner, more tax-efficient path. For S corporation owners, the key is an accountable plan: a written policy under which the corporation reimburses employees, including owner-employees, without the payments counting as wages.
It must meet three IRS tests:
Business connection: the expense must be a legitimate business cost, such as business miles.
Substantiation: the employee documents each expense, such as with a mileage log, within a reasonable time. The IRS safe harbor is 60 days.
Return of excess: any advance beyond substantiated expenses must be returned within a reasonable time. The safe harbor is 120 days.
Meet all three and the corporation deducts the reimbursement, while the owner reports no income and pays no payroll tax on it. Fail any one and the IRS can treat the entire payment as wages.
Unreimbursed employee business expenses are generally not deductible on a personal return, so an accountable plan is an S corporation owner’s way to recover those costs. It must be in writing and actually followed. Sole proprietors don’t use accountable plans; they deduct vehicle costs directly.
Standard Mileage vs. Actual Expenses: A Choice With Lasting Consequences
The 2026 business standard mileage rate started at 72.5 cents per mile and rose to 76 cents on July 1. Standard mileage is simple: track miles, apply the rate, and you are done. It suits higher-mileage drivers with moderate vehicle costs. Actual expenses require more recordkeeping but can produce a larger deduction, covering fuel, repairs, insurance, registration and depreciation, allocated by business-use percentage.
The first-year decision carries the most weight. To use the standard mileage rate on a vehicle you own, you must choose it in the first year it is available for business use. If you start there, you can later switch to actual expenses, but depreciation must be straight-line, with no Section 179 or bonus depreciation. If you start with actual expenses and claim Section 179, bonus depreciation or accelerated depreciation, you are locked out of the standard mileage method on that vehicle for good.
The Documentation Problem Nobody Wants to Talk About
Both paths depend on records. Records made at or near the time of each trip carry the most weight with the IRS; a log reconstructed at year-end carries the least. A solid log shows the date, destination, business purpose and miles for every trip.
Commuting from home to a regular office is generally not deductible, even for the owner, though special rules may apply to trips from a qualifying home office to a client or other business location. Mixing commuting miles into business mileage is one of the most common errors and one of the easiest for the IRS to spot.
Mileage logs assembled right before tax time, sometimes covering a whole year in one sitting, risk more than a disallowed deduction; they put the credibility of the entire return at risk.
Decide Before You Buy
The decisions that matter most are made before the keys change hands. Before buying, ask three questions: Who should own it? How much business use will it realistically have? Which deduction method provides the greatest long-term benefit? The answers shape not only this year’s tax bill but those for years to come. Contact a CPA to discuss your situation and make a smart plan.
