Buying a car through your business is usually worth it when the vehicle is used more than half the time for work and is heavy enough to sidestep the IRS caps on passenger-car depreciation. For a light sedan driven part-time for business, the tax savings are real but modest, and the recordkeeping the IRS demands eats into the benefit. The decision turns on three numbers: your business-use percentage, the vehicle’s gross weight rating, and what you plan to do with the car when you’re done with it.
When Buying Through the Business Actually Pays Off
Two thresholds do most of the work.
The first is 50% business use. Above that line, you can access Section 179 expensing, bonus depreciation, and accelerated depreciation. Drop below it and all three vanish; you’re left depreciating the vehicle on the straight-line method over a longer recovery period, which stretches the write-off out for years.1Internal Revenue Service. Publication 946 (2024), How To Depreciate Property The IRS defines qualifying business driving narrowly. Trips to client sites, deliveries, travel between job locations, and supply runs all count. Your commute from home to a regular office does not, no matter who owns the car.2Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses
The second threshold is the vehicle’s gross weight rating: 6,000 pounds. Below it, the IRS treats the car as a passenger automobile and applies strict annual dollar caps on how much you can deduct. Above it, those caps disappear or ease dramatically, and heavy work vehicles can potentially be written off in full the year you buy them. The rating comes from the manufacturer’s door sticker, not the scale.
Put those two thresholds together and the picture is straightforward. A heavy SUV or work truck used mostly for business is where the tax math gets attractive. A light passenger car used part-time for business is where the promised savings shrink to something close to what you’d get by keeping the car in your own name and deducting mileage.
How Much You Can Deduct in Year One
The Section 280F caps are the ceiling almost every small-business buyer runs into. For a passenger automobile placed in service in 2026 and used 100% for business, the first-year deduction is limited to:3Internal Revenue Service. Rev. Proc. 2026-15, Dollar Amounts for Passenger Automobiles
- $20,300 with bonus depreciation
- $12,300 without it
Subsequent years are capped at $19,800 (year two), $11,900 (year three), and $7,160 for every year after. Buy a $50,000 sedan for full business use and you write off $20,300 in year one, not $50,000. The rest recovers slowly over the following years.
Vehicles rated above 6,000 pounds gross weight play by different rules. Heavy SUVs between 6,000 and 14,000 pounds get a Section 179 deduction of up to $32,000 for 2026, plus bonus depreciation on the remaining cost.4Internal Revenue Service. 2025 Instructions for Form 4562 With 100% bonus depreciation back in place, the full purchase price of a qualifying heavy SUV can potentially come off in year one.
Vehicles that aren’t built primarily to carry passengers escape the SUV cap entirely. A heavy-duty pickup with a bed at least six feet long, a cargo van with no rear seats, and similar work vehicles fall outside the “passenger automobile” definition.5Internal Revenue Service. Publication 463 (2025), Travel, Gift, and Car Expenses A $75,000 work truck rated over 6,000 pounds and used entirely for business could be fully expensed under Section 179 the year it’s placed in service. This is the scenario where buying through the business is most compelling on the numbers alone.
What Section 179 and Bonus Depreciation Actually Do
Section 179 lets you deduct the full purchase price of qualifying business property the year you put it in service instead of spreading it over the asset’s life. The overall 2026 cap is $2,560,000, with a phaseout starting at $4,090,000 in total qualifying property.4Internal Revenue Service. 2025 Instructions for Form 4562 Those ceilings rarely matter for one vehicle; the passenger-auto caps do.
Bonus depreciation is the second lever. The One Big Beautiful Bill Act restored 100% bonus depreciation for qualified property acquired after January 19, 2025.6Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One Big Beautiful Bill It applies automatically unless you elect out; you might elect out if you expect higher tax brackets in coming years and would rather stage the deduction.
Both provisions are gated by the same two thresholds. Business use over 50%, and vehicle weight over 6,000 pounds if you want to escape the $20,300 ceiling. Neither tool overrides the 280F caps for a light passenger car.
Standard Mileage or Actual Expenses
You have two ways to calculate the deduction, and the choice you make in year one can lock you in.
The standard mileage rate for 2026 is 72.5 cents per mile.7Internal Revenue Service. 2026 Standard Mileage Rates Notice 2026-10 You multiply business miles by that rate. Gas, insurance, repairs, and depreciation are all baked in; parking and tolls come on top. It’s simple and works well for a fuel-efficient car with modest operating costs.
The actual expense method requires tracking every operating cost of the vehicle: fuel, oil, tires, insurance, registration, loan interest, and depreciation. You multiply the total by your business-use percentage.8Internal Revenue Service. Topic No. 510, Business Use of Car It’s the only method that lets you claim Section 179 or bonus depreciation. So if you’re buying through the business specifically to grab a large first-year write-off, actual expenses is the only path.
If you want the option of standard mileage, you generally have to choose it the first year the vehicle is available for business. Switch to actual expenses later and you can’t go back.
Either way, a contemporaneous mileage log with the date, destination, and business purpose of each trip is what proves your percentage. Reconstructed logs and round numbers are what auditors disallow.9Internal Revenue Service. Instructions for Form 4562 (2025)
The Catch When You Sell
Every dollar of depreciation you claim reduces the vehicle’s adjusted basis. When you sell, any gain up to the amount of depreciation claimed is depreciation recapture, taxed at ordinary income rates rather than the lower capital gains rate. A business vehicle is Section 1245 property.10Office of the Law Revision Counsel. 26 USC 1245 – Gain From Dispositions of Certain Depreciable Property
An example makes it concrete. Buy a truck for $60,000, claim $60,000 in depreciation over the years, then sell it for $25,000. Adjusted basis is zero, and the full $25,000 is depreciation recapture taxed as ordinary income. Sell the same truck for $65,000 and you owe ordinary income tax on $60,000 (the recaptured depreciation) plus capital gains tax on the last $5,000.
The sale gets reported on Form 4797.11Internal Revenue Service. Instructions for Form 4797 – Sales of Business Property A sale at a loss is generally deductible as a business loss with no recapture. The takeaway: the bigger the front-loaded deduction, the bigger the tax hit at exit. If you swap vehicles every three or four years, model the sale before you commit to a strategy that maximizes year-one write-offs.
Personal Use of a Business-Owned Vehicle
If the business owns the car and you or an employee drive it personally, that personal use is a taxable fringe benefit. The value has to be calculated by the employer and added to the employee’s wages on the W-2.12Internal Revenue Service. Publication 15-B (2025), Employer’s Tax Guide to Fringe Benefits Owners aren’t exempt.
The IRS accepts three valuation methods: multiplying personal miles by the standard mileage rate; using an annual lease value from IRS tables prorated by personal use; or, in narrow circumstances where commuting is the only personal use, valuing each one-way commute at $1.50. Skipping the calculation doesn’t make the personal use go away. If the IRS finds unreported personal use in an audit, you owe back taxes, interest, and possible accuracy-related penalties.
Does the Vehicle Have to Be Titled in the Company’s Name?
No. The IRS lets you deduct the business-use portion of a personally titled vehicle’s costs. Publication 463 doesn’t condition the deduction on whose name is on the title.5Internal Revenue Service. Publication 463 (2025), Travel, Gift, and Car Expenses Drive your own car 12,000 business miles and you can deduct 60% of eligible costs if that’s your business-use share.
Titling in the company’s name still has practical value that isn’t tax-driven. It reinforces the separation between personal and business assets that gives an LLC or corporation its liability protection. It keeps the vehicle’s expenses moving cleanly through business accounts. A business-name loan builds the company’s credit. None of those are IRS requirements. They’re reasons to title in the business name that live outside the tax calculation.
Leasing Instead
Leasing changes the math. Under the actual expense method, you deduct the business-use share of your lease payments as an operating cost.8Internal Revenue Service. Topic No. 510, Business Use of Car There’s no depreciation schedule because you don’t own the asset, which simplifies the books and eliminates the recapture problem at the back end.
Higher-value leases carry a lease inclusion amount, a small figure added back to income each year to offset the deduction. For 2026 leases, the amounts are in Rev. Proc. 2026-15.3Internal Revenue Service. Rev. Proc. 2026-15, Dollar Amounts for Passenger Automobiles For most vehicles under roughly $62,000 fair market value, the inclusion is zero or trivial. On a $150,000 vehicle, the first-year inclusion is around $499.
Leasing tends to fit business owners who cycle through vehicles every few years and don’t want to deal with resale or recapture. Buying fits owners who plan to keep the vehicle a long time and want a large upfront deduction. Cash flow, holding period, and overall tax bracket all factor in.
What It Costs to Do This Right
A business-owned vehicle needs a commercial auto policy. Personal auto policies typically exclude vehicles used in commerce, so a claim after an accident on a delivery run can be denied. Commercial policies carry higher liability limits and generally cost more, which cuts into the tax savings. Factor that into the comparison against simply driving your personal car and deducting mileage.
The deduction itself gets claimed on Form 4562, which asks for the date placed in service, cost, business-use percentage, and depreciation method.13Internal Revenue Service. About Form 4562, Depreciation and Amortization It attaches to whatever return your entity files.
Audit exposure is the last piece. Claiming 100% business use on a single vehicle is the fastest way to draw scrutiny; auditors know almost no one uses a car exclusively for work without a separate personal vehicle. A mileage log with round numbers, gaps, or no weekend entries makes a disallowance easy. Heavy SUVs and trucks bought late in the year get extra attention because the IRS knows they qualify for the largest write-offs. A December purchase of an $80,000 SUV with a claimed 90% business use rate reads as year-end planning, and it needs the records to back it up. Willful inflation of vehicle deductions is prosecutable as tax evasion under 26 U.S.C. § 7201, with fines up to $100,000 for individuals and prison terms up to five years.14Office of the Law Revision Counsel. 26 USC 7201 – Attempt to Evade or Defeat Tax
Buying a car through your business rewards two things: heavy vehicles used mostly for work, and records that stand up to a second look. Miss either and the strategy underperforms the boring alternative of keeping the car in your own name and tracking mileage.