Section 179 on used vehicles works the same way it does on new ones: if you buy a used vehicle for your business and put it in service during the tax year, you can expense a large portion of the cost in year one instead of depreciating it slowly. For 2026, the overall Section 179 cap is $2,560,000 across all qualifying property, but vehicle-specific limits tied to gross vehicle weight rating and the share of business use decide what you actually get to write off.1Office of the Law Revision Counsel. 26 U.S. Code 179 – Election to Expense Certain Depreciable Business Assets
When a Used Vehicle Qualifies
Three conditions have to be met. You bought the vehicle for business use, you placed it in service during the tax year you’re claiming it, and the vehicle is “new to you.”1Office of the Law Revision Counsel. 26 U.S. Code 179 – Election to Expense Certain Depreciable Business Assets
“New to you” matters more than people expect. You cannot buy the vehicle from a spouse, parent, child, grandchild, or other related party under IRC Section 267 and claim Section 179 on it. A purchase from your brother-in-law is fine; a purchase from your son is not. The vehicle also has to be one you haven’t personally used before buying it, even if several unrelated owners held it before you.
Business use has to exceed 50%. Vehicles are classified as listed property, and if business use drops to 50% or below, the vehicle loses Section 179 eligibility entirely and shifts to a slower depreciation method.2Office of the Law Revision Counsel. 26 USC 280F – Limitation on Depreciation for Luxury Automobiles
How Much You Can Deduct by Vehicle Weight
Gross vehicle weight rating is the single biggest factor. GVWR is the maximum loaded weight the manufacturer assigns to the vehicle, printed on the sticker inside the driver’s door jamb. The cutoffs matter because the IRS treats passenger automobiles very differently from larger work vehicles.
Heavy Vehicles Over 14,000 Pounds GVWR
Heavy-duty pickups, large cargo vans, and work trucks with a GVWR above 14,000 pounds qualify for the full Section 179 deduction up to the $2,560,000 annual maximum. A $90,000 used heavy-duty pickup could be fully expensed in year one, provided your business income supports the deduction. These vehicles are too large to be considered passenger automobiles under the tax code.
SUVs and Trucks Between 6,000 and 14,000 Pounds GVWR
Vehicles with a GVWR over 6,000 pounds but not exceeding 14,000 pounds, built on a truck chassis but designed for passenger use, face a separate Section 179 cap. For 2026, that SUV-specific limit is $32,000. Vehicles built purely for cargo rather than passengers, such as windowless cargo vans without rear seating, are exempt from the SUV cap and can take the full deduction.
Lighter Vehicles at 6,000 Pounds GVWR or Less
Most sedans, crossovers, and small SUVs fall under 6,000 pounds GVWR, and the tax code treats them much more strictly. The luxury automobile caps under IRC Section 280F put a hard ceiling on the first-year deduction regardless of what the vehicle costs.
For a lighter vehicle placed in service during 2026 that qualifies for the bonus depreciation add-on, the maximum total first-year deduction, combining Section 179, bonus depreciation, and regular depreciation, is $20,300. Without bonus depreciation, the first-year cap drops to $12,300.3Internal Revenue Service. Rev. Proc. 2026-15
If you pay $55,000 for a used sedan and deduct $20,300 in year one, the remaining $34,700 comes off slowly in future years at capped amounts: $19,800 in year two, $11,900 in year three, and $7,160 per year after that until fully recovered. Section 179 helps you reach the first-year ceiling faster, but it cannot push past it.
Stacking Bonus Depreciation on Top
Bonus depreciation is a separate write-off that works alongside Section 179, and for 2026 it is back at 100%. The One Big Beautiful Bill Act permanently reinstated full bonus depreciation for qualified property acquired after January 19, 2025.4Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One Big Beautiful Bill
Bonus depreciation applies automatically unless you elect out, and it is not capped by your business income. The usual sequence is to take Section 179 first, then apply bonus depreciation to whatever cost remains.
On a heavy vehicle, the combination can wipe out the full cost in year one. Suppose you buy a used SUV for $75,000 that triggers the $32,000 SUV cap on Section 179. You deduct $32,000 under Section 179, leaving $43,000 in remaining basis. At 100% bonus depreciation, you write off the entire $43,000, bringing your total first-year deduction to $75,000, assuming 100% business use.
For lighter vehicles, bonus depreciation only helps you reach the $20,300 first-year cap. The $20,300 ceiling already includes an $8,000 increase specifically for vehicles qualifying for bonus depreciation.3Internal Revenue Service. Rev. Proc. 2026-15
One caution for used vehicles: the OBBBA includes a special rule on used property eligibility for 100% bonus depreciation, and some property may need to meet additional requirements tied to its prior use history. If you are buying a used vehicle that has been in continuous commercial service, confirm eligibility with a tax professional before relying on the full 100% rate.
The Overall Caps That Can Shrink Your Deduction
Three dollar limits sit on top of the vehicle-specific rules. The 2026 Section 179 maximum is $2,560,000 across all qualifying property combined. Once your total qualifying property purchases for the year exceed $4,090,000, that maximum phases down dollar-for-dollar, hitting zero at $6,650,000 in purchases. Most buyers of a single used vehicle will not come close.
The limit that catches more small businesses is the income cap. Your Section 179 deduction cannot exceed your net taxable income from all active trades or businesses. If your business generated $40,000 in taxable income, your Section 179 deduction is capped at $40,000 no matter what you spent. Any disallowed amount carries forward to future years rather than disappearing. Bonus depreciation has no such income limit, which is part of why stacking the two tends to work out.
Records You Need to Actually Claim It
The deduction only holds up with contemporaneous records. Because vehicles are listed property, the IRS expects you to log each business trip at or near the time it happens. Reconstructing months of driving at tax time will not survive an audit.
Every trip entry needs four details:
- Date of the trip
- Business miles driven
- Destination
- Business purpose
Digital mileage apps with exportable reports meet the standard and are easier to keep up than paper logs. You also need odometer readings at the start and end of each tax year to establish total miles and the business use percentage. Per-trip odometer readings are not required.
Business miles divided by total annual miles gives you the business use percentage, which directly scales the deduction. An $80,000 truck used 75% for business supports a Section 179 deduction built on $60,000, not $80,000. Depreciation claims are reported on IRS Form 4562.
Recapture if Business Use Drops or You Sell
A large first-year deduction creates a future tax exposure that is easy to miss. If business use falls to 50% or below in any year during the vehicle’s recovery period, you have to recapture part of the Section 179 deduction as ordinary income.2Office of the Law Revision Counsel. 26 USC 280F – Limitation on Depreciation for Luxury Automobiles The vehicle is retroactively switched to straight-line depreciation, and the difference between what you claimed and what you would have claimed under that slower method is added back to your income.
Selling the vehicle triggers a separate recapture under IRC Section 1245. Any gain on the sale that reflects prior depreciation, including Section 179, is taxed as ordinary income rather than at capital gains rates.5Office of the Law Revision Counsel. 26 USC 1245 – Gain From Dispositions of Certain Depreciable Property The recaptured amount is the lesser of total depreciation taken or the gain realized on the sale. If you claimed $70,000 in combined Section 179 and bonus depreciation on a truck and sold it three years later for $45,000, that $45,000 gain could be taxed entirely as ordinary income.
If the sale price exceeds your original purchase price, the gain above total depreciation taken may qualify for long-term capital gains treatment on a vehicle held more than a year. Recapture and any remaining gain are reported on IRS Form 4797.6Internal Revenue Service. About Form 4797 – Sales of Business Property
State Rules May Not Match
Federal Section 179 is only half the picture. About a dozen states and the District of Columbia do not fully conform to the federal deduction limits, and some cap their state-level equivalent at $25,000. A vehicle that produces a $75,000 federal deduction might yield only $25,000 on your state return, creating a multi-year timing difference you have to track. Check your state’s current conformity before building a tax plan around the federal numbers alone.