Section 179is an IRS provision that lets business owners deduct the full purchase price of qualifying vehicles and equipment in the year they are placed into service, instead of depreciating over 5–7 years. For vehicles with a GVWR over 6,000 lbs used >50% for business, this calculator computes your exact 2026 first-year deduction and net after-tax cost.
Section 179 Vehicle Tax Estimator
Calculate your exact tax savings on heavy SUVs and trucks using the 2026 Section 179 limit and Bonus Depreciation.
Vehicle Details
Net Cash Saved on Taxes
Money kept in your pocket this tax year.
2026 Deduction Breakdown
Popular "Heavy" Vehicles (Over 6k lbs)
- Tesla Model X
- Mercedes-Benz G-Class (G-Wagon)
- Porsche Cayenne
- BMW X5, X6, X7
- Land Rover Range Rover
- Ford F-150 / F-250
- Chevrolet Silverado / Tahoe / Suburban
- Rivian R1T / R1S
Always verify the Gross Vehicle Weight Rating (GVWR) on the driver's side door jamb before purchase. Curb weight does not equal GVWR.
How Section 179 Vehicle Deductions Are Calculated
The deduction is calculated in two layers: the Section 179 deduction (capped at $32,000 for heavy SUVs, unlimited for heavy trucks), and then 100% Bonus Depreciation applied to the remaining basis.
| Vehicle Type | 2026 Deduction Limit |
|---|---|
| Heavy SUV (6k–14k lbs GVWR) | $32,000 Sec 179 + 100% Bonus on remainder |
| Heavy Truck / Van (6k+ lbs, 6ft bed) | 100% of purchase price (no cap) |
| Light Vehicle (<6k lbs GVWR) | ~$20,300 max (luxury auto rules) |
Business use percentage must exceed 50% to claim any Section 179 deduction. If business use drops below 50% in any subsequent year, depreciation recapture applies — meaning you repay some of the deduction as ordinary income.
⚠️ Expert Pro-Tip
Check the manufacturer’s GVWR sticker, not curb weight. The Porsche Macan has a curb weight of ~4,300 lbs but a GVWR under 6,000 lbs — it does NOT qualify. The Porsche Cayenne has a GVWR over 6,000 lbs — it DOES qualify for the full write-off. This distinction is on the door jamb sticker of the vehicle, not on any marketing sheet. Verify GVWR before you buy.
The 6,000 lb Secret: Deducting Your SUV in 2026
GVWR vs. Curb Weight
Business owners frequently make a massive mistake when trying to use the Section 179 vehicle tax loophole: they look at the curb weight instead of the Gross Vehicle Weight Rating (GVWR).
The IRS heavy SUV list is entirely based on GVWR, which is the maximum loaded weight of the vehicle (including passengers and cargo). A Porsche Macan might look heavy, but its GVWR is under 6,000 lbs, making it a "Light Vehicle" subject to strict depreciation caps (around $20,300 total in Year 1). However, stepping up to the Porsche Cayenne pushes the GVWR over 6,000 lbs, unlocking massive tax write-offs for luxury SUVs.
The 2026 SUV Cap vs. Trucks
In 2026, the tax code treats Heavy SUVs differently than Heavy Trucks.
- Heavy SUVs (6k - 14k lbs): The IRS places a cap on the initial Section 179 deduction at $32,000. However, you can then apply 100% Bonus Depreciation to the remaining purchase price, effectively allowing you to write off the entire cost of the vehicle in year one!
- Heavy Trucks (6k+ lbs, 6ft Bed): Vehicles like a Ford F-150 with a full-size bed are considered heavy cargo vehicles. They are exempt from the $32,000 SUV cap entirely, allowing you to take the full purchase price as a direct Section 179 deduction.
The 50% Rule Warning
To claim any Section 179 or Bonus Depreciation deduction, you must use the vehicle more than 50% for business. If your business use ever drops below 50% in subsequent years, you will be subject to "depreciation recapture," meaning you will have to pay back some of those tax savings. Always maintain a meticulous mileage log.