Bonus depreciation for vehicles in 2026 is back at 100 percent. The One Big Beautiful Bill Act (OBBBA), signed into law in 2025, reversed the TCJA phase-down and reinstated full first-year bonus depreciation for qualifying property acquired after January 19, 2025. This is a significant change that business owners need to understand before making vehicle purchase decisions.
Under the original Tax Cuts and Jobs Act schedule, bonus depreciation was set to drop to 20 percent for 2026 and disappear entirely in 2027. The OBBBA eliminated that phase-out, restoring the ability to deduct the full cost of a qualifying vehicle in the year it is placed in service.
What Changed: TCJA Phase-Down vs OBBBA Restoration
The TCJA originally allowed 100 percent bonus depreciation for property placed in service from September 2017 through December 2022. After that, the rate dropped by 20 percentage points each year: 80 percent in 2023, 60 percent in 2024, 40 percent in 2025, and 20 percent in 2026.
The OBBBA reversed this entirely for property acquired after January 19, 2025. If you purchase and place a qualifying vehicle in service in 2026, you can claim 100 percent bonus depreciation regardless of the original phase-down schedule.
There is one important caveat. Property acquired under a binding written contract dated before January 20, 2025 remains subject to the old TCJA phase-down rates, even if the property is not placed in service until 2026. The acquisition date, not the placed-in-service date, determines which rules apply.
How Bonus Depreciation Works for Vehicles
Bonus depreciation allows you to deduct a large portion (or all) of a vehicle’s cost in the first year, rather than spreading the deduction over five or six years through regular MACRS depreciation.
For vehicles, the deduction interacts with Section 179 and the luxury automobile limits. Here is how the pieces fit together for 2026.
Heavy vehicles over 6,000 pounds GVWR. You apply Section 179 first (up to the $32,000 SUV cap for passenger vehicles, or the full limit for qualifying trucks), then apply 100 percent bonus depreciation to the remaining cost basis. A $75,000 heavy SUV could be fully deductible in year one.
Light vehicles under 6,000 pounds GVWR. These are subject to luxury automobile depreciation caps. For 2026, the first-year limit is $12,200 under regular depreciation plus an additional $8,000 bonus depreciation allowance, for a combined maximum of $20,200 in year one. This applies regardless of the vehicle’s actual cost.
Who Benefits From 100 Percent Bonus Depreciation
Self-employed individuals, business owners, and corporations who purchase vehicles for business use are the primary beneficiaries. The vehicle must be used more than 50 percent for business in the year it is placed in service.
Common scenarios where bonus depreciation creates major tax savings include contractors and tradespeople purchasing work trucks, real estate professionals buying SUVs for client visits and property tours, delivery businesses adding vehicles to their fleet, and construction companies expanding their vehicle inventory.
W-2 employees cannot benefit from bonus depreciation on personal vehicle purchases, since the OBBBA permanently eliminated the miscellaneous itemized deduction for unreimbursed employee expenses. For more on this topic, see our guide on the vehicle expense deduction for self-employed.
Bonus Depreciation vs Section 179: Key Differences
Both provisions allow accelerated deductions, but they work differently.
Section 179 requires you to elect the deduction. It has a dollar limit ($2,560,000 for 2026) and a phase-out threshold ($4,090,000). The deduction cannot exceed your business’s taxable income for the year. For heavy SUVs, the cap is $32,000.
Bonus depreciation is automatic unless you elect out. There is no dollar limit. It can create a net operating loss, meaning the deduction can exceed your current-year income. There is no SUV-specific cap beyond the luxury auto limits for light vehicles.
In practice, most business owners apply Section 179 first, then let bonus depreciation cover the remaining basis. For a deeper comparison, see our guide on Section 179 deduction vs mileage rate.
The Recapture Trap to Avoid
If your business use drops to 50 percent or below in any year during the recovery period, the IRS requires you to recapture (pay back) the excess depreciation. This means you would owe additional tax in the year your business use drops.
Track your business use percentage carefully from the start. Tripbook makes this easy by automatically logging every trip as business or personal, giving you precise business-use percentages for each vehicle throughout the year.
New vs Used Vehicles
Both new and used vehicles qualify for 100 percent bonus depreciation in 2026, as long as the vehicle is new to you. The key requirement is that the vehicle was acquired after January 19, 2025. A used vehicle purchased from a dealership in 2026 qualifies just as a factory-new vehicle does.
The vehicle must not have been previously used by you or a related party. You cannot sell a vehicle to a family member and have them claim bonus depreciation on it.
Documentation Requirements
To support your bonus depreciation claim, maintain records of the purchase date and price, the GVWR of the vehicle, a detailed mileage log showing business versus personal use, the date the vehicle was placed in service, and proof that business use exceeds 50 percent.
The IRS requires contemporaneous records, meaning you should track business use as it happens rather than reconstructing it at tax time. Tripbook creates this documentation automatically throughout the year.
Take Advantage of 100 Percent Bonus Depreciation
With bonus depreciation for vehicles back at 100 percent in 2026, business owners have a powerful tool for reducing their tax bill in the year of purchase. The combination of Section 179 and bonus depreciation can eliminate the entire cost of a qualifying heavy vehicle from your taxable income.
Download Tripbook and start tracking your business mileage automatically to maintain the records needed for your depreciation deduction.
