If you buy a truck for your business in 2026, you can likely write off the entire purchase price on this year’s return. The work truck tax write-off combines two overlapping provisions: the Section 179 expense election, with a 2026 cap of $2,560,000, and 100 percent bonus depreciation, which the One Big Beautiful Bill Act permanently restored for property acquired after January 19, 2025.1Internal Revenue Service. One, Big, Beautiful Bill Provisions How much of the price actually comes off your taxable income depends on three things: the truck’s Gross Vehicle Weight Rating, the share of miles you drive for business, and which depreciation elections you make.
Who Can Claim It
The deduction is available to sole proprietors, partnerships, S corporations, C corporations, single-member LLCs, and farmers who report on Schedule F. If your business income lands on Schedule C, you qualify.
W-2 employees do not. The Tax Cuts and Jobs Act eliminated the unreimbursed employee business expense deduction, and the One Big Beautiful Bill Act made that permanent. If you drive a company truck or use your own truck for an employer, your only route to recovering the cost is through your employer’s reimbursement or an accountable plan.
Business Use Has to Clear 50 Percent
Every number in this article is proportional to business use. Drive the truck 80 percent for work and 20 percent for personal errands, and you deduct 80 percent of what you would otherwise be allowed.
Below that, there is a hard floor. The truck must be used more than 50 percent for business to qualify for Section 179 or bonus depreciation at all. At or under 50 percent, both accelerated methods are off the table, and you are left with straight-line depreciation over a longer recovery period. The threshold applies every year of the recovery period, not just the year you buy, which matters for the recapture rules at the end of this article.
Weight Decides Your Write-Off
The tax code treats trucks very differently depending on Gross Vehicle Weight Rating, and the dollar difference between tiers is large. GVWR is the maximum loaded weight the manufacturer assigns to the vehicle, including passengers and cargo. You find it on the certification label stuck to the driver’s side door jamb, not on the window sticker.
Trucks at 6,000 Pounds GVWR or Less
Lighter trucks and most midsize pickups fall under the “passenger automobile” rules, which cap annual depreciation regardless of what the truck actually cost. For a truck placed in service in 2026 with bonus depreciation applied, the first-year cap is $20,300.2Internal Revenue Service. Rev. Proc. 2026-15 – Depreciation Limitations for Passenger Automobiles Without bonus depreciation, the first-year cap drops to $12,300. The caps continue in later years at lower amounts, so even a $45,000 midsize pickup takes roughly four years to fully depreciate. This is why the 6,000-pound line gets so much attention.
Trucks Between 6,001 and 14,000 Pounds GVWR
Crossing 6,000 pounds eliminates the passenger automobile caps. Most full-size pickups land here: the Ford F-250, Chevrolet Silverado 2500, and RAM 2500, along with many large SUVs.
SUVs in this weight range face their own Section 179 cap of $31,300 for 2026. The remaining cost still qualifies for 100 percent bonus depreciation, so a $75,000 heavy SUV used entirely for business can be fully written off in year one: $31,300 under Section 179, $43,700 under bonus depreciation.
Pickup trucks and work vans that are not designed primarily to carry passengers escape the SUV cap entirely. Qualifying features include no seating behind the driver’s seat, a fully enclosed cargo area at least six feet long on delivery-style vans, or a body where no section extends more than 30 inches ahead of the windshield. These vehicles can be fully expensed under the general Section 179 limit.
Trucks Over 14,000 Pounds GVWR
Vehicles over 14,000 pounds GVWR are not passenger automobiles under the tax code and face no SUV-specific cap. This covers Class 4 and heavier commercial trucks, certain Ford F-450 and F-550 configurations, and most box trucks. A $90,000 heavy-duty work truck used entirely for business comes off your taxable income in full in year one.
How Section 179 and Bonus Depreciation Work Together
Section 179 lets you treat the purchase price as a current-year expense instead of depreciating it over five or six years.3Office of the Law Revision Counsel. 26 U.S. Code 179 – Election to Expense Certain Depreciable Business Assets For 2026, the maximum is $2,560,000, phasing out dollar for dollar once your total qualifying equipment purchases exceed $4,090,000. For a small business buying one or two trucks, the ceiling is effectively unlimited. Section 179 cannot exceed your taxable business income for the year, but any unused amount carries forward.
Bonus depreciation picks up after Section 179. For any truck acquired after January 19, 2025, the rate is 100 percent of the remaining adjusted basis in the first year.4Internal Revenue Service. Notice 2026-11 – Interim Guidance on Additional First Year Depreciation Deduction Unlike Section 179, bonus depreciation has no annual dollar ceiling and no taxable income limit. It can create or deepen a net operating loss that carries forward, which makes it useful in a down year when you still need equipment. If you signed a binding purchase contract before January 20, 2025, the older phasedown rates still apply to that vehicle.
In practice, most buyers combine the two: Section 179 up to the applicable cap, then bonus depreciation on whatever is left.
Deducting Fuel, Insurance, and Maintenance
The purchase deduction is separate from the cost of running the truck. For ongoing expenses, you pick one of two methods, and the choice generally locks you in starting the first year.
Standard Mileage Rate
Multiply business miles by the IRS rate: 72.5 cents per mile for 2026.5Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile Twenty thousand business miles yields a $14,500 deduction with minimal paperwork.
The catch: if you claim Section 179 or bonus depreciation on the truck, you cannot ever use the standard mileage rate for that vehicle.6Internal Revenue Service. Topic No. 510, Business Use of Car Since most work truck buyers want the large upfront write-off, the mileage rate is realistically only useful for someone who buys a lighter, cheaper truck and skips accelerated depreciation.
Actual Expense Method
Track every dollar you spend on the truck and deduct the business-use percentage of each cost. Deductible items include fuel, oil changes, maintenance, tires, insurance, registration, loan interest, tolls, and parking. If you claimed Section 179 or bonus depreciation, this is the method you must use. For a truck running $800 a month in fuel and repairs at 90 percent business use, that is $8,640 a year in operating deductions on top of the purchase write-off.
What the IRS Wants to See
Vehicle deductions get audited often, and the IRS does not take your word for business use.
The foundation is a contemporaneous mileage log. Each entry needs the date, destination, business purpose, starting and ending odometer readings, and miles driven.7Internal Revenue Service. Publication 463 (2025), Travel, Gift, and Car Expenses “Contemporaneous” means written at or near the time of each trip. A log reconstructed at tax time from memory does not hold up. GPS-based tracking apps are accepted as long as they capture the required data points, and on a truck generating a $60,000 first-year deduction, a few dollars a month is cheap insurance.
If you use the actual expense method, every cost needs a receipt or invoice showing date, amount, and description.8Internal Revenue Service. What Kind of Records Should I Keep Digital copies are fine if legible and organized.
For the purchase itself, which is reported on Form 4562, keep the bill of sale, the financing agreement, and documentation of the truck’s GVWR.9Internal Revenue Service. About Form 4562, Depreciation and Amortization A photo of the GVWR label on the door jamb works. If your deduction depends on the truck being over 6,000 pounds, you want that proof on file before an audit, not years later.
When the Deduction Gets Clawed Back
A big first-year write-off is not permanent. Two situations trigger recapture, and both surprise people.
First, if business use drops to 50 percent or below in any year during the five-year recovery period, you must recapture the excess depreciation. The recaptured amount is the gap between what you deducted and what the slower straight-line alternative depreciation system method would have allowed.10Internal Revenue Service. Publication 946 (2025), How To Depreciate Property It gets reported on Form 4797 as ordinary income. On a truck where you took a $70,000 Section 179 deduction, shifting to mostly personal use in year three can produce an ugly tax bill. If you expect to reduce business use within five years, factor that in.
Second, when you sell or trade in a depreciated truck, gain is taxed as ordinary income up to the amount of prior depreciation. This is Section 1245 recapture. Buy a truck for $80,000, deduct the full amount, sell it later for $35,000, and that $35,000 is ordinary income rather than capital gain. The write-off is a timing benefit, not a permanent gift: you use the money now and settle up when the vehicle leaves your fleet.