1099 Car Write-Off Rules: Mileage, Actual Expenses, Section 179

A 1099 car write-off lets you deduct the cost of driving for your business on Schedule C, using either the standard mileage rate or the actual expense method. For 2026, the standard mileage rate is 72.5 cents per business mile.¹ The actual expense method lets you add up fuel, insurance, maintenance, and depreciation, then deduct the business-use share, and in 2026 a qualifying heavy vehicle can be written off entirely in year one because 100% bonus depreciation has been permanently restored.² Which method pays more depends on the vehicle, the miles, and how carefully you track them.

What Counts as Business Driving

Every mile you deduct has to be ordinary and necessary for your work. Driving to a client’s location, picking up supplies, moving between job sites, or going to the bank to deposit business checks all qualify. Commuting does not. A trip from home to a regular workplace is personal mileage even if you take business calls on the way.³

One exception matters enormously. If you have a home office that qualifies as your principal place of business, every trip from that office to a client site counts as business mileage. Without the qualifying home office, only travel between your first client and your second (and so on) is deductible; the drive from home to the first stop and from the last stop home is commuting.³

Personal errands never qualify, even sandwiched between business stops. The share of your yearly miles that is genuine business travel becomes your business use percentage, and that number drives everything that follows.

Standard Mileage Rate vs. Actual Expenses

You generally pick whichever method gives you the bigger deduction, but the choice in the first year you use a vehicle for business constrains your later options.³

Start with the standard mileage rate and you can switch to actual expenses in a later year. Start with actual expenses and you are locked into that method for the life of the vehicle. There is also a trap on the way back: if you switch from the standard rate to actual expenses, you must use straight-line depreciation going forward, which means no Section 179 and no bonus depreciation on that vehicle. If you think you might ever want a big first-year write-off, starting with actual expenses keeps that door open.

As a rough guide, contractors who put a lot of miles on a reliable, modestly priced vehicle usually come out ahead with the standard mileage rate. Contractors buying an expensive vehicle, especially a heavier SUV or truck that qualifies for accelerated depreciation, usually do better with actual expenses. Run both calculations before filing your first return with a new vehicle.

The 2026 Standard Mileage Rate

The 72.5-cents-per-mile rate applies to cars, vans, pickups, and panel trucks, including electric and hybrid vehicles.¹ It bundles fuel, maintenance, repairs, insurance, registration, and depreciation into one figure, so you don’t track those costs separately.

Business parking and tolls are deductible on top of the mileage rate. Parking at your regular place of business is a commuting cost and is not deductible.³

A contractor who drives 18,000 business miles in 2026 would claim $13,050 (18,000 × $0.725), plus business parking and tolls. The paperwork is light; what the IRS wants is a credible mileage log.

The Actual Expense Method

Under actual expenses, you tally everything you spend owning and running the vehicle, then multiply by your business use percentage. Deductible operating costs include fuel, oil changes, tires, repairs, insurance, registration, and car washes. If you financed the vehicle, the business-use share of the loan interest is also deductible.³

Operating costs by themselves rarely beat the standard mileage rate. The reason to put up with the extra record-keeping is depreciation, which lets you recover a portion of the purchase price each year — and in some cases most of it in year one.

Luxury Auto Limits for Passenger Vehicles

Vehicles under 6,000 pounds gross vehicle weight rating (GVWR), which covers most sedans, small SUVs, and crossovers, run into annual depreciation caps regardless of what the vehicle cost. For a vehicle placed in service in 2026 where bonus depreciation applies, the caps are:

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

Without bonus depreciation, the first-year cap drops to $12,300; the later-year caps are the same.⁴ Buy a $60,000 sedan and use it 100% for business, and you still cannot deduct more than $20,300 in year one.

If business use drops to 50% or below in any year, you lose accelerated methods and must use straight-line depreciation over five years.³

Heavy Vehicles, Section 179, and Bonus Depreciation

Vehicles with a GVWR above 6,000 pounds are not subject to those luxury auto caps, which is where large first-year deductions become possible.

Section 179 lets you expense the cost of a qualifying business asset in the year it is placed in service. The overall 2026 Section 179 cap is $2,560,000, far more than any single vehicle costs. SUVs with a GVWR between 6,001 and 14,000 pounds, however, have a separate Section 179 cap of $32,000.⁵ Pickup trucks and vans in the same weight range, and vehicles with a bed at least six feet long, are not subject to that SUV-specific cap.

Stacked on top of Section 179, 100% bonus depreciation was permanently restored for qualifying property placed in service after January 19, 2025.² For a heavy SUV, Section 179 covers the first $32,000 and bonus depreciation can absorb the rest, so a contractor using the vehicle more than 50% for business can write off the full purchase price in year one.

GVWR is a manufacturer specification printed on a sticker inside the driver’s-side door jamb, and it is the maximum loaded weight, not the curb weight. Verify the rating before buying. Different trim levels of the same model can fall on different sides of the 6,000-pound line.

One recent change worth noting: the federal clean vehicle credits under Section 30D and Section 45W were terminated for vehicles acquired after September 30, 2025, so contractors buying electric or hybrid vehicles in 2026 cannot claim those credits.⁶

If You Lease Instead of Buy

With a lease, you deduct the business-use share of each monthly payment instead of claiming depreciation.³

Expensive leased vehicles have one wrinkle. If the vehicle’s fair market value exceeds $62,000 for a lease beginning in 2026, you must add a calculated “inclusion amount” to income each year.⁴ The number comes from an IRS table based on the vehicle’s value and the year of the lease, and it exists to keep lessees of expensive vehicles from doing better tax-wise than buyers who are capped by the luxury auto limits. The amount is modest in early years and grows.

Records the IRS Expects

This is where most vehicle deductions get thrown out. The IRS wants contemporaneous records, meaning you log trips at or near the time they happen. A mileage log reconstructed in April from memory is exactly the kind of thing that fails under audit.

For each business trip, record the date, destination, business purpose, and miles. Capture your odometer reading on January 1 and December 31 so you can compute total miles for the year and verify the business use percentage.³ A round trip from your home office to a client can be a single entry. A quick personal stop between two business appointments does not break the business character of the trip.

Smartphone mileage apps are the easiest way to maintain this, since they log GPS data and timestamp trips automatically. Paper logs work if you keep up with them.

Under the actual expense method, keep receipts for fuel, maintenance, repairs, insurance, and registration. For depreciation, hold on to the purchase contract or bill of sale showing the price and the date you placed the vehicle in service. If you are relying on the 6,000-pound GVWR rule, keep a photo of the door jamb sticker or a manufacturer’s spec sheet.⁷

A credible claim beats an aggressive one. A 75% business use figure backed by a detailed log holds up far better in audit than 100% with nothing behind it, and if the IRS disallows the deduction, the resulting underpayment can carry a 20% accuracy-related penalty on top of the extra tax.⁸

Where It Goes on Your Return

Vehicle expenses for 1099 income land on Schedule C (Profit or Loss From Business).⁹

For the standard mileage rate: multiply business miles by $0.725, add business parking and tolls, and enter the total on Line 9. Complete Part IV, which asks for total mileage, business mileage, and the date you placed the vehicle in service.¹⁰

For actual expenses, the reporting splits across lines. Operating costs (fuel, oil, repairs, insurance, registration) go on Line 9. Depreciation goes on Line 13. Lease payments go on Line 20a.¹⁰

Any depreciation claim, including Section 179 and bonus depreciation, requires Form 4562, Depreciation and Amortization. It captures the vehicle’s cost, placed-in-service date, business use percentage, and depreciation method, and the computed figure flows into Line 13 of Schedule C.⁷

Selling or Trading In the Vehicle Later

A write-off now can turn into income later. Every dollar of depreciation you claimed, including Section 179 and bonus depreciation, reduces the vehicle’s tax basis. When you sell or trade in, any gain above that reduced basis is taxed as ordinary income to the extent of the depreciation claimed. This is called depreciation recapture.¹¹

The effect is largest when you took a big first-year deduction. Write off a $55,000 truck entirely in year one, sell it for $35,000 two years later, and you have $35,000 of ordinary income to report. The sale goes on Form 4797, Sales of Business Property.¹²

Trading in at a dealership doesn’t help. Since the Tax Cuts and Jobs Act, like-kind exchanges are limited to real property, so a vehicle trade-in is treated as a sale followed by a separate purchase, and any gain on the trade-in is taxable the same as a private sale.¹³

1
Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents per Mile, Up 2.5 Cents
2
Internal Revenue Service. One, Big, Beautiful Bill Provisions
3
Internal Revenue Service. Publication 463 (2025), Travel, Gift, and Car Expenses
4
Internal Revenue Service. Rev. Proc. 2026-15
5
Office of the Law Revision Counsel. 26 USC 179 – Election to Expense Certain Depreciable Business Assets
6
Office of the Law Revision Counsel. 26 USC 30D – Clean Vehicle Credit
7
Internal Revenue Service. 2025 Instructions for Form 4562 – Depreciation and Amortization
8
Internal Revenue Service. Accuracy-Related Penalty
9
Internal Revenue Service. Topic No. 510, Business Use of Car
10
Internal Revenue Service. Instructions for Schedule C (Form 1040) (2025)
11
Office of the Law Revision Counsel. 26 USC 1245 – Gain From Dispositions of Certain Depreciable Property
12
Internal Revenue Service. 2025 Instructions for Form 4797 – Sales of Business Property
13
Internal Revenue Service. Tax Cuts and Jobs Act: A Comparison for Businesses