Accelerated Depreciation for Vehicles: Section 179, Bonus, and Recapture

Accelerated depreciation for vehicles lets a business deduct most or all of a qualifying vehicle’s cost in the first year rather than spreading it across the standard five-year schedule. For 2026, a heavy vehicle over 6,000 pounds gross vehicle weight rating used more than 50% for business can often be written off in full in year one by combining Section 179 expensing with 100% bonus depreciation. A lighter passenger vehicle, no matter how expensive, is capped at $20,300 in the first year and recovers the rest over six or more years.

The difference between those two outcomes comes down to three things: the vehicle’s weight rating, your business-use percentage, and which deduction method you apply.

The 6,000-Pound Weight Line

Gross vehicle weight rating (GVWR) is the maximum loaded weight the manufacturer assigns to the vehicle. It’s printed on a sticker inside the driver’s door jamb, and it’s not the same as curb weight. GVWR is what the IRS looks at.

The rule sorts vehicles into three groups:

GVWR of 6,000 pounds or less. These are “passenger automobiles” and are subject to strict annual dollar caps regardless of purchase price.
GVWR between 6,000 and 14,000 pounds. These escape the passenger auto caps but face a separate $32,000 Section 179 limit if they’re SUVs. Many full-size SUVs, heavy-duty pickups, and cargo vans land here.
GVWR over 14,000 pounds. Large commercial trucks and certain heavy-duty vans, with no special dollar cap under Section 179.

Check the GVWR sticker before you buy. Popular midsize SUVs often sit right at the line: a vehicle rated at 5,900 pounds is treated as a passenger auto, and one at 6,100 pounds is not.

The 50% Business-Use Requirement

To use accelerated depreciation at all, you must use the vehicle more than 50% for business in the year you place it in service.¹ If business use is 70%, then 70% of the cost is your depreciable basis, and every dollar limit below applies to that reduced number.

The 50% threshold isn’t a one-time test. It applies every year the vehicle remains in service and not yet fully depreciated. Drop below 50% later, and you trigger recapture.

Section 179 Expensing

Section 179 lets you treat the cost of qualifying business property as an immediate expense. For tax years beginning in 2026, the overall Section 179 cap is $2,560,000, phasing out dollar-for-dollar once total qualifying property placed in service exceeds $4,090,000.² That cap covers all Section 179 property combined, not just vehicles.

Heavy SUVs between 6,000 and 14,000 pounds GVWR get a lower, separate cap. For 2026, Section 179 on these vehicles is limited to $32,000. Congress added this ceiling so the full expensing limit couldn’t be used on what are essentially passenger vehicles that happen to be heavy. Whatever cost remains after the $32,000 deduction can still be written off through bonus depreciation.

Vehicles over 14,000 pounds GVWR aren’t subject to the SUV cap and can be expensed up to the full $2,560,000.

One important constraint: Section 179 cannot exceed your net taxable income from all active businesses for the year. If your business earns $40,000 and you buy a $60,000 vehicle, your Section 179 deduction stops at $40,000. The disallowed amount carries forward indefinitely and can be used in future years when income is sufficient.²

Bonus Depreciation

Bonus depreciation is a separate first-year deduction that works alongside Section 179. Under the One, Big, Beautiful Bill Act signed in 2025, 100% bonus depreciation is now permanent for qualifying property acquired after January 19, 2025.³ The scheduled phase-down from the Tax Cuts and Jobs Act is gone: vehicles placed in service after that date qualify for the full 100% rate with no expiration.⁴

Bonus depreciation has no taxable income limitation. Where Section 179 stops at your business income, bonus depreciation keeps going and can create or increase a net operating loss. That NOL carries forward and can offset up to 80% of taxable income in future years.⁵ NOLs arising after 2017 generally cannot be carried back to prior years.

When both methods are available, Section 179 is calculated first. Bonus depreciation then applies to whatever basis remains. For a heavy SUV, that means $32,000 through Section 179 and 100% bonus depreciation on the rest, which can wipe out the entire purchase price in year one.

First-Year Caps for Lighter Passenger Vehicles

Vehicles with a GVWR of 6,000 pounds or less face annual dollar caps that override both Section 179 and bonus depreciation. For a vehicle placed in service in 2026 where bonus depreciation applies, the caps are:⁶

Year one: $20,300
Year two: $19,800
Year three: $11,900
Each year after: $7,160 until the cost is fully recovered

These caps cover every form of depreciation combined. You can’t claim $20,300 in Section 179 and then add bonus depreciation on top.

If bonus depreciation doesn’t apply, either because the vehicle doesn’t qualify or you elect out, the year-one cap drops to $12,300. The later-year limits stay the same.⁶

What This Looks Like in Practice

Take a $68,000 SUV with a GVWR of 7,200 pounds, purchased in 2026 and used 100% for business:

Section 179 expenses $32,000. Remaining basis: $36,000.
Bonus depreciation covers the remaining $36,000. Remaining basis: $0.
First-year deduction: $68,000.

Now the same $68,000 spent on a 4,500-pound sedan, also used 100% for business:

First-year deduction, all methods combined: $20,300.
Remaining $47,700 recovers at $19,800 in year two, $11,900 in year three, and $7,160 in each following year.

Drop the heavy SUV’s business use to 80%, and you multiply the $68,000 cost by 80% for a depreciable basis of $54,400. Section 179 covers $32,000, bonus depreciation covers the remaining $22,400, and the first-year deduction is $54,400.

Recapture If Business Use Drops

If business use falls to 50% or below in any year after you claimed accelerated depreciation, you trigger recapture.⁷ The IRS compares what you actually deducted against what you would have deducted using the slower Alternative Depreciation System straight-line method. The difference gets added back to your ordinary income in the year business use drops. For a vehicle fully expensed in year one, that clawback can run into tens of thousands of dollars.

From that year forward, you must also switch to ADS straight-line for the vehicle’s remaining basis. Accelerated methods are off the table for that vehicle permanently.

Selling the Vehicle Later

Vehicles are Section 1245 property. Any gain on sale attributable to depreciation you previously claimed is taxed as ordinary income, not at capital gains rates.

The math: compare the sale price to your adjusted basis (original cost minus all depreciation taken). Gain up to the total depreciation claimed is ordinary income. Only gain exceeding total depreciation gets capital gains treatment, and for depreciable business vehicles that situation is uncommon.

Say you bought a $68,000 truck, deducted the full amount, and sold it three years later for $35,000. Your adjusted basis is zero, and the entire $35,000 is ordinary income, reported on Form 4797.⁷ Accelerated depreciation doesn’t eliminate tax on the vehicle’s cost; it shifts the timing.

The Records You Need

The IRS classifies vehicles as “listed property,” which means stricter documentation than for ordinary business assets.¹ The core requirement is a contemporaneous mileage log, recorded close to the time of each trip rather than reconstructed at tax time. For each business trip, note the date, destination, business purpose, and miles driven. Total business miles divided by total miles gives you the business-use percentage.

Without adequate records, an audit can disallow the deduction entirely. For a vehicle you fully expensed in year one, that adjustment is brutal. GPS-based mileage apps generate logs that are harder to challenge than a handwritten notebook.

Leasing Is a Different System

If you lease instead of buy, you don’t claim depreciation at all. You deduct your lease payments as a business expense, in proportion to business use. A $900 monthly lease at 75% business use produces a $675 monthly deduction.

To keep lessees from sidestepping the passenger auto caps, the IRS requires a “lease inclusion” amount added back into income each year for higher-value vehicles. Those amounts come from tables in Rev. Proc. 2026-15 and tend to be modest relative to the lease cost.⁶

Mistakes That Cost Money

The most expensive error is assuming any SUV qualifies for the full write-off. Many popular midsize SUVs sit at or just under the 6,000-pound line. Confirm the GVWR on the door sticker before you buy.

The second is missing the Section 179 income limitation. In a low-income year, a Section 179 election can exceed net business income and create a disallowed amount the owner didn’t plan for. The carryforward helps, but it isn’t the immediate tax savings that was the point.

The third is treating a year-one write-off as final. Selling the vehicle, trading it in, or dropping business use below 50% each triggers a tax consequence. Planning for those outcomes at purchase, not at sale, is what separates a good deduction from an unpleasant surprise.

1
Internal Revenue Service. Publication 946 – How To Depreciate Property
2
Office of the Law Revision Counsel. 26 USC 179 – Election To Expense Certain Depreciable Business Assets
3
Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One, Big, Beautiful Bill
4
Internal Revenue Service. Notice 2026-11 – Interim Guidance on Additional First Year Depreciation Deduction
5
Internal Revenue Service. Tax Cuts and Jobs Act – A Comparison for Businesses
6
Internal Revenue Service. Rev. Proc. 2026-15 – Depreciation Limitations for Passenger Automobiles
7
Internal Revenue Service. About Form 4797, Sales of Business Property