New Car Tax Deductions: Personal, Business, and Lease Rules

Buying a new car for personal use gives you very little to deduct on your federal return beyond the state and local sales tax you paid, and only then if you itemize. New car tax deductions get much more generous if the vehicle is used more than half the time for a trade or business, where Section 179 and 100% bonus depreciation can wipe out most or all of the purchase price in the first year. One thing to clear off the table: if you were counting on the federal clean vehicle credit for an EV or plug-in hybrid, Congress repealed it under the One Big Beautiful Bill Act for vehicles acquired after September 30, 2025.¹

If the Car Is for Personal Use

Your one real federal deduction is the sales tax paid at the dealership. It goes on Schedule A, and only works if two things are true: you itemize instead of taking the standard deduction, and you elect to deduct state and local sales taxes rather than state income taxes. You cannot claim both.²

Itemizing only pays off when your total itemized deductions exceed the standard deduction. For 2026, that standard deduction is $16,100 for single filers, $32,200 for married couples filing jointly, and $24,150 for heads of household.³ If you live in a state with no income tax, the sales tax on a $40,000 car plus your other taxable purchases during the year may push you over the threshold.

Everything you deduct for state and local taxes competes for one combined SALT cap. For 2026, that cap is roughly $40,000 for most filers and $20,000 if married filing separately. The cap phases down if your modified adjusted gross income exceeds $505,000 ($252,500 for married filing separately), but never below $10,000 ($5,000 if married filing separately).⁴ Sales tax, state income tax, and property tax all share that single ceiling.

Value-Based Registration Fees

Some states charge annual vehicle registration partly based on the car’s value. That value-based portion counts as a deductible personal property tax on Schedule A and falls under the same SALT cap.⁵ Flat fees, weight-based fees, and plate charges do not qualify. If your registration bill combines everything, check your state DMV breakdown to isolate the value-based piece.

If the Car Is for Business

To claim any depreciation or expensing deduction on a vehicle, you must use it more than 50% for business during the tax year.⁶ Business use means driving tied to your trade or business: meeting clients, moving between job sites, hauling equipment, making deliveries. Your business-use percentage becomes the multiplier on nearly every vehicle deduction you take.

Commuting between home and a regular workplace is not business use. The IRS treats it as personal no matter how far you drive or whether you take calls on the way.⁷ One exception matters: if you have a qualifying home office that is your principal place of business, trips from that home office to client sites or other work locations count as deductible business mileage.⁸

The Mileage Log the IRS Expects

You need a contemporaneous mileage log recording the date, destination, business purpose, and miles for each business trip. Contemporaneous means recorded at or near the time of the trip, not reconstructed at tax time. Without it, the IRS can disallow the entire vehicle deduction on audit.⁹

Your business-use percentage is business miles divided by total miles for the year. A car driven 15,000 total miles with 9,000 business miles comes out to 60%, and that 60% is what you apply to your depreciation and expense deductions.

Two Methods for Deducting What It Costs to Drive

Beyond the purchase price, you can deduct the ongoing cost of running a business vehicle under one of two methods. Choose carefully, because the choice can lock in.

Standard Mileage Rate

For 2026, the IRS rate is 72.5 cents per business mile.¹⁰ It bundles in gas, insurance, repairs, and a depreciation component of 35 cents per mile.¹¹ Multiply business miles by the rate and claim the result. Business-trip parking fees and tolls are deductible on top of the rate.¹²

Standard mileage tends to work well when you drive a lot of business miles in a modest vehicle. The tradeoff is that you cannot separately deduct gas, maintenance, insurance, or other running costs, since the rate already covers them.

Actual Expense Method

Under actual expenses, you track every cost of operating the vehicle: fuel, oil changes, tires, repairs, insurance, registration, and depreciation or lease payments. Total them and multiply by your business-use percentage.¹² Loan interest is included in the pool and allocated the same way. So are lease payments.

Actual expenses usually produce a larger deduction when the vehicle is expensive to operate, when depreciation is heavy, or when business-use is high but total mileage is low.

How the Choice Can Lock You In

If you want the standard mileage rate, you have to elect it the first year the car is available for business. In later years you can switch to actual expenses. The reverse is not always allowed. If you claim Section 179 expensing or bonus depreciation in year one, you are permanently locked into actual expenses for that vehicle.⁶ The reason is that the standard rate already contains a depreciation component, and letting you use both would double-count. This is where many business owners stumble: they grab the big first-year write-off without realizing they have signed up to track actual expenses for the life of the vehicle.

Writing Off the Purchase Price

The real tax benefit of a business vehicle is recovering the purchase price. Three tools stack on top of each other.

Section 179 Expensing

Section 179 lets you deduct the full purchase price of a qualifying business vehicle in the year you place it in service, rather than spreading it over several years. The vehicle must be used more than 50% for business, and the deduction cannot create or increase a net business loss; it is capped at your business’s taxable income for the year.⁶ Passenger cars face a much tighter cap, covered below.

Bonus Depreciation

The One Big Beautiful Bill Act made 100% bonus depreciation permanent for qualifying property acquired after January 19, 2025.¹³ A vehicle placed in service in 2026 can therefore be written off entirely in year one, subject to the luxury auto caps for lighter passenger vehicles. Unlike Section 179, bonus depreciation has no taxable-income limit and can create or deepen a net operating loss. It applies automatically unless you elect out.

MACRS Depreciation

Any basis left after Section 179 and bonus depreciation is recovered through the Modified Accelerated Cost Recovery System. Vehicles fall into the five-year property class.¹⁴ On a qualifying heavy vehicle fully expensed in year one, nothing is left to depreciate. MACRS matters most for passenger cars where the annual caps leave unrecovered basis for later years.

The Luxury Auto Caps

Reality check on the math. The IRS imposes annual dollar limits on depreciation for passenger vehicles, defined as four-wheeled vehicles rated at 6,000 pounds gross vehicle weight or less.¹⁵ These caps apply no matter which tool you use. For passenger automobiles placed in service during 2026 where 100% bonus depreciation applies:

Year 1: $20,300
Year 2: $19,800
Year 3: $11,900
Each year after: $7,160

If you elect out of bonus depreciation, the first-year cap drops to $12,300; later years are unchanged.¹⁶ These numbers assume 100% business use. If your business-use percentage is lower, multiply the cap by that percentage. A $55,000 sedan used 80% for business has a first-year ceiling of $16,240, and the rest takes years to recover.

The Heavy Vehicle Exception

Vehicles with a gross vehicle weight rating above 6,000 pounds are not classified as passenger automobiles, so the luxury caps do not apply.¹⁵ A qualifying heavy pickup, cargo van, or work truck can take the full Section 179 and bonus depreciation deduction in the first year, limited only by the overall Section 179 cap and your business-use percentage.

SUVs rated between 6,000 and 14,000 pounds get a partial break. They escape the passenger-vehicle caps but face a separate Section 179 ceiling of $32,000 for 2026. Any remaining cost above that can still be deducted through 100% bonus depreciation, so in practice most heavy SUVs used entirely for business can be fully written off in year one. Trucks and vans with a cargo bed at least six feet long are not subject to the SUV limit and can use the full Section 179 amount.

This exception has created a well-known incentive to buy heavy vehicles, and the IRS knows it. Business-use percentage claims on large SUVs draw extra audit scrutiny. The mileage log needs to support the deduction.

If You Lease Instead of Buy

Lease payments are deductible as an operating expense under the actual expense method, prorated by business-use percentage. There is no separate depreciation deduction because you do not own the vehicle. The IRS keeps leased luxury cars in line with owned ones through a “lease inclusion amount” that adds a small figure back to your income each year of the lease, effectively trimming your net deduction.¹⁷ The inclusion amount depends on the car’s fair market value at the start of the lease and is published in IRS tables. For vehicles priced under roughly $62,000, the annual add-back is modest enough that leasing still produces a meaningful deduction.

W-2 Employees Driving Their Own Car

If you are a regular W-2 employee using a personal car for work, you cannot deduct those vehicle costs on your federal return. The Tax Cuts and Jobs Act eliminated the deduction for unreimbursed employee business expenses starting in 2018, and the One Big Beautiful Bill Act made the elimination permanent, with no sunset.

A narrow exception keeps Form 2106 open for four groups: Armed Forces reservists, qualified performing artists, fee-basis state or local government officials, and employees with impairment-related work expenses.⁹ Everyone else is out of luck federally. If your employer offers an accountable reimbursement plan, that reimbursement is tax-free to you and deductible to the employer, which is the next best thing.

What Happens When You Sell

Every dollar of depreciation you claimed comes back into play when you sell or trade a business vehicle. If the sale price exceeds the vehicle’s adjusted basis (original cost minus accumulated depreciation), you owe depreciation recapture tax on the difference. Under Section 1245, that recaptured amount is taxed as ordinary income at rates as high as 37%. This applies equally to depreciation taken through Section 179, bonus depreciation, and MACRS.

The math can sting. Buy a heavy SUV for $70,000, deduct the full amount via Section 179 in year one, and sell it three years later for $35,000. Your adjusted basis is zero because you already expensed the entire cost. The full $35,000 is ordinary income. If you plan to rotate vehicles frequently, factor recapture in before taking the largest possible first-year deduction.

1
Internal Revenue Service. Clean Vehicle Tax Credits
2
Internal Revenue Service. 2025 Instructions for Schedule A (Form 1040)
3
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
4
Internal Revenue Service. Topic No. 503, Deductible Taxes
5
IRS.gov. Schedule A – Itemized Deductions
6
Internal Revenue Service. Publication 463 (2025), Travel, Gift, and Car Expenses
7
Internal Revenue Service. Travel and Entertainment Expenses FAQ
8
Internal Revenue Service. Publication 587 (2025), Business Use of Your Home
9
Internal Revenue Service. Instructions for Form 2106 (2025)
10
Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile, Up 2.5 Cents
11
Internal Revenue Service. 2026 Standard Mileage Rates Notice 2026-10
12
Internal Revenue Service. Topic No. 510, Business Use of Car
13
Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One Big Beautiful Bill
14
Internal Revenue Service. Publication 946 (2025), How To Depreciate Property
15
Office of the Law Revision Counsel. 26 USC 280F – Limitation on Depreciation for Luxury Automobiles
16
Internal Revenue Service. Rev. Proc. 2026-15 – Depreciation Limitations for Passenger Automobiles
17
Internal Revenue Service. Rev. Proc. 2026-15 – Lease Inclusion Amounts for Passenger Automobiles