Business Car Tax Deduction: Mileage, Actual Costs, and Depreciation

If you drive your own vehicle for work, the business car tax deduction lets you write off those trips one of two ways: multiply your business miles by the IRS standard rate (72.5 cents per mile for 2026) or deduct the business-use share of what the vehicle actually costs you to own and operate.¹ The deduction only covers the business portion of your driving, and choosing the right method in year one shapes what you can do later.

Which Trips Actually Count

The tax code allows deductions for the ordinary and necessary expenses of running a business, and vehicle costs fall under that heading.² The IRS draws a hard line, though, between business driving and commuting.

Deductible trips include driving from your office to a client, moving between two work sites in the same day, and going from a qualifying home office to any other work location. If you have a regular office but get sent to a temporary work site, that daily round trip from home is deductible too.³

What never counts: driving from home to your regular workplace. The IRS treats that as personal commuting no matter how far the drive or whether you take business calls on the way.³ Distance doesn’t change the rule.

When one vehicle handles both work and personal errands, only the business-use percentage of miles is deductible. A car driven 70% for work yields a deduction based on that 70% share, and the split matters under both methods.

Who Can Claim the Deduction

This is primarily a deduction for the self-employed. Sole proprietors, independent contractors, single-member LLC owners, and partners can claim business vehicle costs. If you file a Schedule C, it’s almost certainly available to you.

W-2 employees have a much narrower path. The Tax Cuts and Jobs Act eliminated most unreimbursed employee business expenses starting in 2018. Only Armed Forces reservists, qualified performing artists, fee-basis state or local government officials, and employees with disability-related work expenses can still claim vehicle costs through Form 2106.⁴ Outside those categories, an employee whose employer doesn’t reimburse mileage is generally out of luck on the federal return.

The Standard Mileage Rate

The simpler method is straight multiplication: business miles times the IRS rate. For 2026 that rate is 72.5 cents per mile, and it covers gas, oil, insurance, repairs, tires, registration, and depreciation all in one number.¹ The IRS recalculates it each year from a study of actual operating costs.

Two costs sit outside the per-mile figure and can be deducted separately: business-related parking fees and tolls. Parking at your regular workplace doesn’t qualify, but parking at a client’s building or paying a toll on the way to a job site does.³ People often miss these because they assume the mileage rate is all-inclusive.

The rate applies to cars, vans, pickups, and panel trucks, including electric and hybrid vehicles. You must own or lease the vehicle, and you can’t run five or more vehicles at the same time in a fleet.⁵

The Actual Expense Method

Under actual expenses, you add up everything you spend on the vehicle during the year and deduct the business-use percentage of the total. Qualifying costs include gas, oil changes, tires, repairs, insurance, registration, lease payments, and garage rent. If you own the vehicle, depreciation is part of the calculation too.

This method usually produces a larger deduction for expensive vehicles or cars with high operating costs, because you’re deducting real dollars instead of a flat rate. The tradeoff is paperwork: receipts for every category, plus a mileage log to calculate the business-use share.

Leased vehicles use a variation. You deduct the business portion of each lease payment as part of your actual expenses, but if the vehicle’s fair market value exceeds an IRS threshold, you must add an “inclusion amount” to your income each year. That reduces the effective deduction and stops taxpayers from using a lease to sidestep the depreciation caps on purchased cars.⁶ The 2026 inclusion amounts appear in Table 3 of Revenue Procedure 2026-15.

Choosing a Method and Switching Later

The timing of your first choice matters. To keep the option of using the standard mileage rate, you must elect it in the first year the vehicle is available for business use. After that, you can switch between standard mileage and actual expenses year to year.⁵

There’s a catch when you do switch. If you start on the standard mileage rate and later move to actual expenses before the car is fully depreciated, you must use straight-line depreciation for the remaining useful life rather than the accelerated methods that normally apply.⁵ That can meaningfully shrink the depreciation deduction compared with using actual expenses from the start.

Leased vehicles are stricter. Choose the standard mileage rate on a lease, and you’re locked into that method for the entire lease, including renewals.¹

As a rough guide, the standard mileage rate favors inexpensive vehicles driven heavily for business. Actual expenses tend to favor newer, pricier vehicles, where depreciation alone can outrun the per-mile calculation. Running both numbers in your first year is the surest way to see which method saves more.

Buying a Vehicle: Expensing and Depreciation

When you purchase a vehicle for business, the tax code lets you accelerate deductions well beyond ordinary annual depreciation through Section 179 and bonus depreciation.

Section 179 lets you deduct the full purchase price of qualifying business assets in the year you place them in service.⁷ The 2026 overall Section 179 limit is $2,560,000, with a phase-out beginning at $4,090,000 in total equipment purchases. Most small businesses will run into the vehicle-specific caps first.

Bonus depreciation was restored to a permanent 100% by the One Big Beautiful Bill Act of 2025 for qualifying property acquired after January 19, 2025.⁸ A vehicle placed in service in 2026 can qualify for a full first-year write-off, subject to the passenger automobile caps below.

Both provisions require more than 50% business use. Drop below that threshold and you lose eligibility, falling back to the slower alternative depreciation system.⁹

Passenger Vehicles Under 6,000 Pounds

Section 280F caps depreciation on standard passenger cars and light trucks regardless of the vehicle’s actual cost. For vehicles placed in service in 2026 with bonus depreciation, the first-year cap is $20,300, followed by $19,800 in year two, $11,900 in year three, and $7,160 each year after. Without bonus depreciation, the first-year cap drops to $12,300; the later-year figures are the same.⁶

The practical effect: even with 100% bonus depreciation, a $55,000 sedan can’t be fully deducted in year one. You’re capped at $20,300 and keep deducting until the business-use portion of the cost is recovered.

Heavy Vehicles Over 6,000 Pounds

Vehicles with a gross vehicle weight rating above 6,000 pounds are exempt from the 280F caps, which is why heavy SUVs and trucks draw so much tax-planning attention. A qualifying heavy vehicle can be fully expensed using Section 179 and bonus depreciation in the year it’s placed in service.

One sub-limit applies: SUVs designed primarily to carry passengers with a GVWR between 6,000 and 14,000 pounds are subject to a $32,000 cap on the Section 179 portion.¹⁰ Bonus depreciation can cover the rest with no dollar cap. A $75,000 heavy SUV used 100% for business could be written off entirely in year one: $32,000 under Section 179 and the balance through bonus depreciation.

The GVWR is printed on a sticker inside the driver’s side door jamb. It reflects the maximum loaded weight the manufacturer rates the vehicle to handle, not curb weight. Plenty of full-size SUVs and pickups clear the 6,000-pound mark.

What Happens If Business Use Drops

Large first-year deductions carry a future risk. If your business-use percentage falls to 50% or below in any year after you claimed Section 179 or bonus depreciation, the IRS requires you to pay back part of that benefit through depreciation recapture.⁹

The recapture amount equals the difference between what you actually deducted in prior years and what you would have deducted under the alternative depreciation system. That difference is added back to your income in the year your business use dropped, and you must use the alternative depreciation system going forward on that vehicle. This is one reason aggressive first-year expensing can backfire when a work vehicle eventually shifts toward personal use.

Selling the Vehicle

When you sell a vehicle you’ve been depreciating, the IRS won’t let you keep both the earlier deductions and a clean sale. Any gain, up to the total depreciation you previously claimed, is taxed as ordinary income rather than at capital gains rates. That applies to Section 179, bonus depreciation, and regular annual depreciation alike.

The mechanics: buy a truck for $50,000, claim $35,000 in total depreciation (adjusted basis of $15,000), sell for $30,000, and the full $15,000 gain is ordinary income because it’s within the $35,000 of prior depreciation. Only a sale price above the original cost would generate any capital gain portion.

Report the sale on Form 4797. A sale at a loss doesn’t trigger recapture, and the business-use portion of the loss is deductible as an ordinary loss. Losses on the personal-use portion aren’t deductible.

Records That Hold Up

The vehicle deduction is one of the most challenged items on a tax return, and the reason is almost always weak records. The IRS expects a contemporaneous mileage log, meaning you record trips close to when they happen rather than reconstructing the year at tax time. Each entry should include date, destination, business purpose, and miles driven.

If you use actual expenses, keep receipts for fuel, insurance, repairs, registration, and lease or loan statements. Digital copies are fine if legible and organized. Sole proprietors report vehicle information in Part IV of Schedule C, which asks when the vehicle was placed in service, total miles, and the breakdown between business, commuting, and personal use.¹¹ The form also asks whether you have written evidence supporting the deduction.

Mismatches between reported miles and the deduction claimed are easy for the IRS to flag. Taxpayers who can’t back up their numbers face a 20% accuracy-related penalty on any resulting underpayment.¹² Keep vehicle records for at least three years from the date you file.¹³

Where the Deduction Goes on Your Return

Sole proprietors and single-member LLCs report vehicle expenses on Schedule C (Form 1040). Car and truck expenses go on Line 9, with the supporting details in Part IV.¹⁴ If you’re claiming Section 179 or depreciation beyond the standard mileage rate, you’ll also file Form 4562.

The narrow group of employees who still qualify use Form 2106 to calculate and report their expenses.⁴ Partnerships and S corporations handle vehicle deductions at the entity level or through an accountable reimbursement plan rather than on individual returns.

The deduction reduces taxable income directly, which lowers both income tax and, for self-employed filers, the self-employment tax on your net profit.

Electric Vehicles: One Boundary Note

The deduction rules above apply the same way to electric and hybrid vehicles: the 2026 mileage rate covers them, and Section 179 works identically regardless of fuel type.¹ What you won’t get in 2026 is a purchase credit. The New Clean Vehicle Credit, Used Clean Vehicle Credit, and Commercial Clean Vehicle Credit were all terminated for vehicles acquired after September 30, 2025 under the One Big Beautiful Bill Act.¹⁵

1
Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile, Up 2.5 Cents
2
Office of the Law Revision Counsel. 26 US Code 162 – Trade or Business Expenses
3
Internal Revenue Service. Publication 463 – Travel, Gift, and Car Expenses
4
Internal Revenue Service. Instructions for Form 2106
5
Internal Revenue Service. Topic No. 510, Business Use of Car
6
Internal Revenue Service. Revenue Procedure 2026-15
7
Office of the Law Revision Counsel. 26 USC 179 – Election to Expense Certain Depreciable Business Assets
8
Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One Big Beautiful Bill
9
Office of the Law Revision Counsel. 26 USC 280F – Limitation on Depreciation for Luxury Automobiles
10
Office of the Law Revision Counsel. 26 US Code 179 – Election to Expense Certain Depreciable Business Assets
11
Internal Revenue Service. Schedule C (Form 1040) – Profit or Loss From Business
12
Office of the Law Revision Counsel. 26 US Code 6662 – Imposition of Accuracy-Related Penalty on Underpayments
13
Internal Revenue Service. How Long Should I Keep Records
14
Internal Revenue Service. Instructions for Schedule C (Form 1040)
15
Internal Revenue Service. One, Big, Beautiful Bill Provisions