Section 179 for Vehicles: The 6,000-Pound Rule Explained

Vehicles carry their own limits inside section 179. How much of a truck, van or SUV you can expense in the first year depends on its weight rating, its body and how much of its use is for the business. This page covers vehicles only: the 6,000-pound line and where to find a vehicle's rating, the $32,000 SUV cap for 2026 and what escapes it, the 2026 caps for lighter vehicles, bonus depreciation on top, the business-use test and recapture. The general rules, including the $2,560,000 limit, the business income cap and Form 4562, are in the section 179 deduction guide.

The 6,000-pound line and where to find the rating

The line comes from the definition of a passenger automobile in IRC 280F(d)(5): a 4-wheeled vehicle made primarily for use on public streets, roads and highways and rated at 6,000 pounds or less. For a truck or van the statute measures gross vehicle weight; for other vehicles, unloaded gross vehicle weight. The IRS states the heavy-SUV rule by gross vehicle weight too: more than 6,000 pounds and not more than 14,000 (Publication 946; Instructions for Form 4562).

The IRS does not publish a list of vehicles that clear the line. It does not need one: federal vehicle rules require the manufacturer to attach a certification label to the hinge pillar, the door-latch post or the door edge next to the driver's seat, falling back to the left side of the instrument panel or the inward-facing surface of the driver's door when none of those is practicable, and the label must show “Gross Vehicle Weight Rating” or “GVWR” in pounds (49 CFR 567.4). GVWR is the manufacturer's stated loaded weight of the vehicle (49 CFR 571.3), and the labeled value cannot be less than the unloaded weight plus the rated cargo load plus 150 pounds for each designated seating position. A vehicle can therefore weigh well under 6,000 pounds empty and still carry a rating above it. The rating is the number that counts, so photograph the label and keep the photo with the purchase records.

How the rules sort a vehicle

Section 179 on any of these vehicles needs more than 50% business use in the year it goes into service (Publication 946), and every row except the last also carries the listed property recordkeeping rules covered below. Publication 946 is explicit that weight does not change that part: vehicles rated above the 6,000-pound threshold are not passenger automobiles, but they remain listed property as other property used for transportation.

The $32,000 SUV cap for 2026

For tax years beginning in 2026, no more than $32,000 of an SUV's cost can be taken into account under section 179 (Rev. Proc. 2025-32, section 4.24). The statute sets the base at $25,000 and indexes it (IRC 179(b)(5) and (6)); for tax years beginning in 2025 the figure was $31,300 (Publication 946). How it works:

• It limits section 179, not the vehicle's whole write-off. The cap is on the cost taken into account under section 179 for each SUV. Bonus depreciation can apply to the cost above it, as the illustration below shows.
• It applies to the business-use cost. Only the business share of a vehicle's cost is eligible in the first place. An $80,000 SUV used 80% for business has $64,000 of business-use cost, and section 179 can take $32,000 of it.
• It reaches beyond classic SUVs. The statute defines an SUV as any 4-wheeled vehicle primarily designed for or able to carry passengers on public roads, not subject to section 280F, and rated at not more than 14,000 pounds gross vehicle weight (IRC 179(b)(5)(B)(i)). Anything in that band is capped unless an exclusion below applies.

Pickups, vans and larger vehicles that escape the SUV cap

IRC 179(b)(5)(B)(ii) takes three kinds of vehicle out of the SUV definition, so the $32,000 cap does not apply to them:

1. More than 9 seats behind the driver. A vehicle designed to seat more than nine persons behind the driver's seat.
2. A 6-foot cargo area. A cargo area at least 6 feet in interior length that is open, or designed to be open but enclosed by a cap, and is not readily accessible directly from the passenger compartment. This is the full-size pickup exclusion. A pickup rated over 6,000 pounds with a shorter bed does not meet it, and because the SUV definition covers any vehicle that “can be used to carry passengers,” its section 179 amount is capped at $32,000 like an SUV's.
3. The enclosed van. A vehicle with an integral enclosure fully enclosing the driver compartment and the load-carrying area, with no seating behind the driver's seat and no body section protruding more than 30 inches ahead of the leading edge of the windshield: the typical full-size cargo van.

Some work vehicles leave the listed property rules altogether as qualified nonpersonal use vehicles, those that by their nature are not likely to be used more than a minimal amount for personal purposes (IRC 274(i)). Publication 946's list includes vehicles designed to carry cargo with a loaded gross vehicle weight over 14,000 pounds; bucket trucks, cement mixers, dump trucks, flatbed trucks and refrigerated trucks; delivery trucks with seating only for the driver, or the driver plus a folding jump seat; and trucks and vans specially modified so they are unlikely to see more than minimal personal use, for example with permanent shelving and paint displaying advertising or the company's name. The IRC 274(d) substantiation rules do not apply to these vehicles.

Vehicles at or under 6,000 pounds: the 2026 depreciation caps

A passenger automobile, meaning a car, SUV, pickup or van at or under the line, has annual dollar caps on depreciation under IRC 280F(a), and any section 179 deduction on it counts toward the same cap (IRC 280F(d)(1)). For vehicles placed in service in 2026, Rev. Proc. 2026-15 sets the caps, and for that purpose “passenger automobiles” includes trucks and vans:

• Why the bonus column is higher in year one. IRC 168(k)(2)(F)(i) adds $8,000 to the first-year cap for a vehicle that qualifies for bonus depreciation.
• Personal use shrinks the cap. Multiply the cap by the business-use percentage. At 2026 figures, a vehicle used 60% for business with no bonus is capped at $12,300 × 60% = $7,380 in year one; the Form 4562 instructions show the same method with the 2025 cap.
• When the no-bonus column governs. Rev. Proc. 2026-15 lists the cases: business use of 50% or less in 2026, an election out of bonus for the class, a used vehicle that fails the acquisition rules, or a vehicle acquired before September 28, 2017.

Which column applies, and how the remaining cost is recovered in later years, depends on whether bonus depreciation is claimed on the vehicle, so that choice is worth settling before the return is filed.

Bonus depreciation above the section 179 amount

Bonus depreciation is taken after any section 179 deduction and before regular depreciation (Instructions for Form 4562). Since P.L. 119-21 it is 100% for qualified property acquired after January 19, 2025, and property is not treated as acquired later than the date a written binding contract for it was signed (IRC 168(k) and the section 70301(c) note). For vehicles that means:

• It fills in above the SUV cap. On a heavy SUV used more than 50% for business, section 179 can take $32,000 and bonus the rest of the business-use cost, or bonus can take all of it. Bonus has no business income limit; section 179 cannot exceed business income (IRC 179(b)(3)).
• The contract date matters. A vehicle acquired under a contract signed before January 20, 2025 and placed in service in 2026 gets 20% bonus under the earlier rules, not 100% (Rev. Proc. 2026-15, section 2.02).
• Used vehicles can qualify. Section 179 allows a used vehicle bought from an unrelated seller (IRC 179(d)(2)); bonus also requires that you never used the vehicle before you acquired it (IRC 168(k)(2)(E)(i)).
• Opting out covers the whole class. An election out of bonus applies to all qualified property in the class placed in service that year, not to one vehicle, and can be revoked only with IRS consent (IRC 168(k)(7)).

Worked illustration: four vehicles placed in service in 2026

With 100% bonus available, the SUV cap only changes the mix: the heavy SUV and both pickups reach their full business-use cost in year one either way. The cap starts to matter when bonus is not taken, by an election out or for a vehicle bought under a contract signed before January 20, 2025. With bonus elected out, the 6.5-foot bed is worth $19,200 more in year one than the 5.5-foot bed. The crossover, under the line, stays inside its 280F cap in both columns.

For a 2026 deduction the vehicle has to be delivered and ready for its business use by the last day of the tax year, since the deduction follows the placed-in-service date (Publication 946). Year-end purchase timing is covered in year-end tax planning.

The more-than-50% test and the records behind it

Listed property must be used more than 50% in a qualified business use in the year it is placed in service to qualify for section 179 or bonus depreciation; at 50% or less, depreciation is figured straight-line over the alternative depreciation system recovery period (IRC 280F(b); Publication 946). What counts, and what does not:

• Commuting is not business use, even when work gets done during the drive (Publication 946).
• Investment use can be combined with business use to figure the depreciation amount, but it does not count toward the 50% test (Publication 946).
• An owner's personal use of a company vehicle never counts. Use by a 5% owner or a related person as compensation, or a lease to one, is not qualified business use (IRC 280F(d)(6)(C)). For other employees, compensatory use counts only when its value is included in the employee's income, with withholding where required.
• Personal first, business later does not work. A vehicle first used for personal purposes cannot qualify for section 179 in a later year when its use turns to business (Publication 463).

Then the proof. No deduction is allowed for listed property unless its use is substantiated by adequate records or by sufficient evidence corroborating your own statement (IRC 274(d)). Publication 946 lists what the records must show: the amount of each expense, the business use and the total use of the vehicle (mileage), the date, and the business purpose. A daily log is not required, but a record made at or near the time is preferred to one reconstructed later, and the records must be kept for as long as recapture can occur, which is any year of the recovery period.

Recapture when business use drops

If business use falls to 50% or less in a later year of the recovery period, the excess depreciation comes back as income that year (IRC 280F(b)(2)): everything deducted, including section 179 and bonus depreciation (IRC 168(k)(2)(F)(ii)), minus what straight-line depreciation over the alternative depreciation system would have allowed. The basis goes up by the same amount and later years use straight-line depreciation. The computation goes on Form 4797, Part IV, and the income is reported on the same form or schedule that took the deduction (Publication 946).

Selling the vehicle is a separate event. Gain on a sale is recaptured as ordinary income up to the depreciation allowed, including section 179 and bonus depreciation, under the section 1245 rules (Publication 946; Instructions for Form 4562).

Standard mileage rate or depreciation: choose before you expense

Claiming section 179 or bonus depreciation on a vehicle rules out the standard mileage rate for that vehicle (Rev. Proc. 2019-46, section 4.05(3); Publication 463). The mileage rate is also unavailable to a business running five or more vehicles at the same time. A large first-year deduction is a one-way choice for that vehicle, so compare it with the mileage rate over the years you expect to drive it before you elect.

Sources: 26 U.S.C. 179, election to expense certain depreciable business assets; 26 U.S.C. 280F, limits for automobiles and listed property; 26 U.S.C. 168, including 168(k) and the P.L. 119-21 section 70301(c) note; 26 U.S.C. 274, including 274(d) and 274(i); IRS, Rev. Proc. 2025-32, section 4.24 (2026 section 179 and SUV amounts); IRS, Rev. Proc. 2026-15 (2026 passenger automobile depreciation limits); IRS Publication 946 (2025), How To Depreciate Property; IRS, Instructions for Form 4562 (2025); IRS Publication 463 (2025), Travel, Gift, and Car Expenses; IRS, Rev. Proc. 2019-46 (standard mileage rate rules); 49 CFR 567.4, vehicle certification label requirements; 49 CFR 571.3, definitions (gross vehicle weight rating). Figures and rules checked against these sources in September 2026; illustrations computed in Python. This is general information, not tax advice for your situation. Tax services are provided by licensed tax professionals under a separate engagement agreement. BEG does not provide tax advice.