Should I buy a 6,000-pound SUV for the tax write-off?

Buying a heavy SUV you don't need, just for the deduction, is usually a bad trade. The deduction is real. The problem is the math behind it.

A deduction is not a credit. It reduces taxable income, so it saves you your marginal tax rate times the deduction, not the full purchase price. Spending a dollar to save thirty-some cents still leaves you sixty-some cents poorer.

Who this applies to

• Self-employed owners, single-member LLC owners and S-Corp owners thinking about buying a vehicle mainly because of the tax write-off.
• Anyone who has seen the "G-Wagon loophole" or "6,000-pound rule" on social media and wants to know what it really does.
• Owners deciding whether to buy before December 31 to lower their 2026 tax bill.

Who it doesn't

• Businesses that genuinely need a heavy truck or large SUV to operate: towing, hauling, job sites, carrying equipment. For them, the question isn't whether to buy, it's how to depreciate what they were going to buy anyway.
• Vehicles used 50% or less for business. They don't qualify for Section 179 or bonus depreciation at all.
• Employees reimbursed by an employer they don't own.

What is the 6,000-pound rule?

Tax law caps the yearly depreciation on a "passenger automobile" (Section 280F of the Internal Revenue Code). A truck or van rated over 6,000 pounds gross vehicle weight falls outside that definition, so those caps don't apply. That's the whole "rule."

Gross vehicle weight rating (GVWR) is the manufacturer's maximum loaded weight, not the curb weight. Many full-size SUVs and pickups clear 6,000 pounds GVWR. Most sedans and compact SUVs don't.

How much can I deduct on a heavy SUV in 2026?

Two separate provisions do the work, and the internet tends to blur them.

Section 179 expensing. For tax years beginning in 2026, the overall Section 179 limit is $2,560,000, reduced once qualifying purchases pass $4,090,000. For an SUV rated over 6,000 and up to 14,000 pounds GVWR, the Section 179 amount is capped at $32,000. Section 179 also can't exceed your taxable income from active businesses; the excess carries forward.

Bonus depreciation. The 2025 tax law (Public Law 119-21) restored 100% bonus depreciation for qualifying property acquired and placed in service after January 19, 2025. Bonus depreciation on a heavy SUV isn't subject to the $32,000 SUV cap and isn't limited to business income.

Put together, a heavy SUV used 100% for business can be fully deducted in the year it's placed in service, on the federal return.

Not every big vehicle counts as an "SUV" for the $32,000 cap. Under Publication 946, the cap doesn't apply to vehicles that seat more than nine passengers behind the driver, vehicles with an open cargo area at least 6 feet long inside that isn't readily accessible from the passenger compartment (think a full-size pickup bed), or certain vehicles with no seating behind the driver.

What do the social media posts leave out?

Business use percentage. You deduct only the business share. At 70% business use, 30% of the cost is never deductible, and personal driving (including commuting) doesn't count as business use. You need a mileage log to prove the percentage.

Recapture. If business use falls to 50% or less in any later year of the recovery period, the excess depreciation you already took comes back as ordinary income (Section 280F(b)). Sell or trade the vehicle and the gain is taxed as ordinary income up to the depreciation and Section 179 you claimed (Section 1245).

Cash and overhead. A second vehicle brings a second insurance policy, registration, maintenance and a loan payment. None of that is free just because part of it is deductible.

Georgia. Georgia has not adopted federal bonus depreciation (Section 168(k)). Georgia taxpayers add back federal bonus depreciation and depreciate the vehicle under Georgia's rules, so the first-year state deduction can be much smaller than the federal one.

Placed in service. The vehicle has to be ready and available for business use by December 31. Buying it on December 30 and taking delivery in January moves the deduction to the next year.

Isn't the standard mileage rate on my current car better?

Often, yes. The 2026 business standard mileage rate is 72.5 cents per mile for miles driven before July 1, 2026, and 76 cents per mile on or after July 1, 2026, after the IRS's midyear increase.

The mileage deduction comes from driving you already do. It costs no new cash, it doesn't depend on buying anything, and there's no depreciation recapture on a car you never depreciated. Parking and tolls for business trips are deductible on top of it.

Two rules matter. You have to choose the standard mileage rate in the first year a car you own is used in the business. And once you claim Section 179, bonus depreciation or MACRS on a vehicle, you can't use the standard mileage rate for that vehicle later.

A worked example

Option A wins the first-year deduction contest. It loses the cash contest by a wide margin.

To be fair to Option A: its owner can also deduct 80% of fuel, insurance and repairs, while Option B's mileage rate replaces those costs. And the SUV keeps some resale value, but selling it triggers Section 1245 recapture on the gain, taxed as ordinary income.

If the business would have bought the vehicle anyway, the deduction is a welcome bonus. If the deduction is the reason for the purchase, the math rarely works.

How it changes for an S-Corp owner

With an S-Corp, the question becomes whether the company owns the vehicle or reimburses you for driving your own car.

Company-owned vehicle. The S-Corp buys the vehicle and takes the depreciation, which flows to the owner on Schedule K-1. Personal use, including commuting, is a taxable fringe benefit. Publication 15-B treats a more-than-2% shareholder like a partner for fringe benefit purposes, so the value of that personal use generally belongs in the owner's wages.

Mileage reimbursement. The owner keeps the car personally, and the S-Corp reimburses business miles at the IRS rate under an accountable plan (a written reimbursement arrangement with substantiation and return-of-excess rules). The company deducts the reimbursement, and the owner doesn't report it as income.

For most owners who don't need a heavy vehicle, the reimbursement route is simpler and keeps the vehicle, the loan and the recapture risk off the company's books.

The bottom line

The 6,000-pound rule is real, and for 2026 a heavy SUV used mostly for business can be fully expensed on the federal return through 100% bonus depreciation. That doesn't make the purchase a good decision.

A deduction saves your marginal rate, not the sticker price. If the business doesn't need the vehicle, the standard mileage rate on the car you already own, or a mileage reimbursement from your S-Corp, usually leaves more money in the bank.

If you're weighing a year-end vehicle purchase or an S-Corp election, a 20-minute intro call is the place to run your own numbers.