Heavy vehicle thresholds
Vehicles with a gross vehicle weight rating (GVWR) of more than 6,000 pounds qualify for higher depreciation limits than standard passenger autos. Vehicles over 14,000 lbs (heavy trucks, vans, work vehicles) escape the listed-property rules entirely. The 6,000-14,000 lb sweet spot includes many large SUVs, pickups, and crew cabs.
Section 179 SUV cap
Section 179 expense for SUVs in the 6,000-14,000 GVWR range is capped at $30,500 (2024) — the so-called "SUV cap" intended to limit the loophole that let business owners write off luxury SUVs entirely. The remainder of the cost depreciates under MACRS or qualifies for bonus depreciation.
Heavy trucks and vans
Trucks and vans (cargo vans, crew cabs with a 6+ ft cargo bed, vehicles seating more than 9 passengers behind the driver) over 6,000 GVWR escape the SUV cap and can be fully expensed under Section 179 up to the regular Section 179 annual limit.
Business-use requirement
A vehicle must be used more than 50% for business to claim Section 179. Drop below 50% in a later year and recapture rules require you to add to income the excess accelerated depreciation over what straight-line would have allowed.
Bonus depreciation alternative
Bonus depreciation may be available alongside or instead of Section 179. Bonus depreciation has no taxable-income limit and no SUV cap (although the per-vehicle luxury-auto cap still applies). For 2024, bonus is 60%, declining to 0% in 2027.
Common mistakes that disallow the deduction
The recurring ways this deduction gets disallowed in examination cluster in four categories: (1) personal-use expenses bundled with business (the deduction is disallowed entirely or apportioned downward); (2) inadequate substantiation (no receipt, no invoice, no business-purpose note); (3) the wrong line on Schedule C (not fatal, but it weakens audit defense); and (4) double-counting with another line (for example, deducting an expense on Schedule C and also on Form 8829, or as a personal itemized deduction on Schedule A). The fix in every case is contemporaneous bookkeeping and a clean chart of accounts.
Where this fits in the larger Schedule C picture
Schedule C has more than two dozen named expense lines plus an "Other expenses" catch-all. For most small businesses, four or five lines drive the bulk of the deduction total — vehicle, home office, depreciation, contract labor or wages, and supplies — and the remaining lines individually contribute small amounts that nevertheless add up. Treating each named line as a recurring decision rather than an afterthought, and revisiting the categories each January, often surfaces $2,000–$5,000 in additional legitimate deductions that a less disciplined process would have missed entirely.