6,000 lb Vehicle Tax Deduction Rules (Section 179)

A vehicle with a gross vehicle weight rating above 6,000 pounds is not subject to the luxury auto depreciation limits in IRC Section 280F, which is why heavy SUVs and trucks can generate first year deductions that ordinary cars cannot. Heavy SUVs are still capped for Section 179 purposes at an inflation adjusted limit around $31,300, but bonus depreciation can cover the remaining basis. Pickups with a bed of at least six feet avoid the SUV cap entirely.

Why 6,000 Pounds Is the Line

Section 280F imposes annual depreciation caps on passenger automobiles to prevent luxury car write offs. Those caps are severe: a few thousand dollars a year, stretching the deduction on an expensive car over many years.

The statute excludes from the definition of passenger automobile any vehicle with a gross vehicle weight rating over 6,000 pounds. GVWR is the manufacturer's maximum loaded weight, not curb weight, and it is printed on the driver's door jamb sticker. Many mid and full size SUVs and nearly all full size pickups clear it.

The Three Tiers

Vehicle type	Section 179 limit	Bonus depreciation
Passenger auto, 6,000 lb GVWR or less	Subject to 280F caps	Subject to 280F caps
SUV over 6,000 lb GVWR	Capped near $31,300, indexed	100% of remaining basis
Pickup over 6,000 lb with 6 ft bed, or cargo van	Full Section 179, up to the general cap	100% of remaining basis

The SUV cap in Section 179(b)(5) applies to vehicles between 6,000 and 14,000 pounds GVWR. The exceptions that escape it:

A cargo area of at least six feet that is not readily accessible from the passenger compartment, which is the standard pickup exception
A vehicle with seating for more than nine passengers behind the driver, such as a shuttle van
A vehicle with no seating behind the driver and no body section extending more than 30 inches ahead of the windshield, meaning a true cargo van

What a Full Deduction Looks Like

An $85,000 SUV with 8,000 pound GVWR, used 100 percent for business and placed in service in 2026:

Step	Amount
Section 179 on heavy SUV	~$31,300
100% bonus depreciation on remainder	~$53,700
Total year one deduction	$85,000
Value at 37% federal	~$31,450

With 100 percent bonus depreciation permanent, the SUV cap has become far less consequential. Bonus picks up whatever Section 179 leaves behind.

The Business Use Requirement Is Where People Get Hurt

Vehicles are listed property under Section 280F(d)(4). Two rules follow:

Business use must exceed 50 percent to claim Section 179 or accelerated depreciation. At 50 percent or less, you are forced onto straight line ADS.
The deduction is proportional. Use the vehicle 70 percent for business and you deduct 70 percent of the cost, not all of it.

If business use later drops to 50 percent or below, recapture applies. You must recompute depreciation as if you had used straight line ADS from the start and report the excess as ordinary income in the year the use dropped. Buying a heavy SUV in a high income year and then using it mostly personally afterward is how a large deduction turns into a large add back.

Substantiation: The Part Everyone Skips

Section 274(d) requires that listed property deductions be substantiated by adequate records. Estimates and after the fact reconstructions are routinely disallowed. You need a contemporaneous log capturing:

Date of each business trip
Mileage for the trip
Destination
Business purpose
Total annual mileage, to compute the business percentage

A mileage tracking app satisfies this and takes almost no effort. A shoebox of gas receipts does not. See vehicle deductions and mileage logs.

Actual Expense Versus Standard Mileage

Section 179 and bonus depreciation are only available under the actual expense method. If you use the standard mileage rate, depreciation is already baked into the rate and no separate deduction is allowed.

You also cannot switch freely. If you use actual expenses with accelerated depreciation in year one, you are locked into actual expenses for that vehicle for as long as you own it. For an expensive heavy vehicle driven modestly, actual expenses usually wins. For a cheaper vehicle driven a lot of miles, standard mileage often wins. Run both before the first return is filed.

S Corp and Partnership Owners: Ownership Matters

If the vehicle is titled to you personally but used for the business, the cleanest treatment is usually reimbursement through an accountable plan at the standard mileage rate, which is deductible to the business and tax free to you. Titling the vehicle in the entity allows the entity to depreciate it, but then personal use becomes a taxable fringe benefit that must be valued and added to your W-2. Neither approach is automatically better, and mixing them incorrectly is a common exam finding. See how S corp owners handle mixed use assets.

A Note on How This Gets Marketed

The heavy vehicle deduction is real and it is in the statute. It is also promoted online in ways that ignore the business use requirement, the substantiation rules, and the recapture exposure. The deduction is worth having when you genuinely need the vehicle for the business. It is not a reason to buy a vehicle you would not otherwise buy, since you are spending a full dollar to save roughly forty cents.

Frequently Asked Questions

What is the 6,000 pound vehicle tax deduction rule?

Vehicles with a gross vehicle weight rating over 6,000 pounds are excluded from the definition of a passenger automobile under IRC Section 280F, so they are not subject to the annual luxury auto depreciation caps. This allows much larger first year deductions through Section 179 and bonus depreciation. GVWR is the manufacturer's maximum loaded weight and appears on the driver's door jamb sticker, not the vehicle's curb weight.

How much can you deduct for an SUV over 6,000 pounds?

Section 179 expensing on a heavy SUV between 6,000 and 14,000 pounds GVWR is capped at an inflation adjusted amount around $31,300. However, 100 percent bonus depreciation can cover the remaining basis, so a business owner using the vehicle entirely for business can often deduct the full cost in year one. The deduction is reduced proportionally by any personal use.

Do pickup trucks avoid the Section 179 SUV limit?

Yes, if the truck has a cargo bed of at least six feet that is not readily accessible from the passenger compartment. That exception in Section 179(b)(5) removes the SUV cap, allowing full Section 179 expensing up to the general annual limit. Vehicles seating more than nine passengers behind the driver and true cargo vans also qualify for the exception.

What happens if business use of my vehicle drops below 50 percent?

Recapture applies. You must recompute depreciation as if the straight line Alternative Depreciation System had been used from the year the vehicle was placed in service, and report the excess previously claimed as ordinary income in the year business use fell to 50 percent or less. This can create a significant add back years after the original deduction.

Can I take Section 179 on a vehicle if I use the standard mileage rate?

No. Section 179 and bonus depreciation are only available under the actual expense method. The standard mileage rate already includes a depreciation component, so no separate depreciation deduction is permitted. Choosing accelerated depreciation in the first year generally locks you into the actual expense method for that vehicle for as long as you own it.

Should my business or I personally own the vehicle?

It depends. Personal ownership with reimbursement through an accountable plan at the standard mileage rate is simple, deductible to the business, and tax free to you. Entity ownership allows the business to depreciate the vehicle but makes personal use a taxable fringe benefit that must be valued and included on your W-2. The right answer turns on vehicle cost, business use percentage, and how much administrative work you are willing to carry.

The 6,000 Pound Vehicle Rule: Section 179 and Bonus Depreciation on SUVs and Trucks