Buying guide

Buying a luxury SUV or exotic car through your business: section 179, 100% bonus depreciation, the 6,000-pound line, and the December 31 deadline

Updated November 1, 2026 · Written by the House of Biz & Company Editorial Team · General information, not legal or financial advice

When the company buys the car, the most generous year-end rules in a decade meet some of the strictest tests in the tax code. Whether a superb SUV can be largely written off this year, or a sports car is held to about $20,000, turns on its weight rating, how much you truly drive it for business, the day it is delivered, and the log you keep. Here is each rule, read from the statutes, the IRS’s own revenue procedures and Publication 946, and the Illinois Department of Revenue.

We don’t sell, lease, broker, consign, or finance vehicles, and we don’t prepare tax returns. Only for the Wealthy is a publisher. This is general information drawn from the Internal Revenue Code, IRS revenue procedures and Publication 946, the Illinois Department of Revenue, and federal vehicle-labeling rules cited below. It is not tax or legal advice: whether any of it applies to you depends on your business, your entity, and your records, so confirm it with your CPA before you sign. We are not affiliated with any dealer, manufacturer, or agency named here, and we earn nothing from them.

Why the calendar matters now

Every autumn, owners of profitable businesses ask the same question: if the company buys the car, how much of it can be written off this year? For 2026 the answer is unusually generous. The One Big Beautiful Bill Act restored a 100% special depreciation allowance (“bonus depreciation”) for qualified property acquired and placed in service after January 19, 2025 [3][6], and raised the section 179 expensing limit, which for tax years beginning in 2026 is $2,560,000 [1][3]. But the rules that decide how much of that reaches a fine car are older and stricter, and they turn on four things: the vehicle’s weight rating, how much you actually use it for business, the date it is placed in service, and the records you keep. Get them right and the deduction is real. Get them wrong and it can come back as ordinary income in a later year. Here is how each one works, read from the statutes and the IRS’s own guidance.

1. The 6,000-pound line decides everything

The tax code treats most cars as “passenger automobiles,” a category with its own annual depreciation ceilings under section 280F [5]. The definition depends on weight, and the weight that counts differs by body type:

A car is a passenger automobile if it is rated at 6,000 pounds unloaded gross vehicle weight or less [5]. A sports car or grand tourer measured by its own curb-side weight lands here.
A truck or van is measured by gross vehicle weight, its fully loaded rating, and is a passenger automobile only at 6,000 pounds or less [3][5].
Heavier sport utility vehicles sit outside the passenger-automobile ceilings. Section 179 defines a “sport utility vehicle” for its own separate cap as a 4-wheeled passenger vehicle that is not subject to section 280F and is rated at not more than 14,000 pounds gross vehicle weight; the IRS describes it as one rated at more than 6,000 and not more than 14,000 pounds [3][4].

Don’t take the weight from a brochure or a forum. Every vehicle sold in the U.S. carries a certification label, usually on the driver’s door edge or post, that must state the “Gross Vehicle Weight Rating” or “GVWR” in pounds [10]. Photograph that label for your file before the car is registered. Two trims of the same model can sit on opposite sides of the line, and the label is the evidence your preparer will want.

2. Two very different write-offs

	Passenger automobile (most cars, lighter SUVs)	Heavy SUV (over 6,000 lb GVWR, up to 14,000)
First-year ceiling, placed in service in 2026	$20,300 if bonus depreciation applies; $12,300 if it doesn’t [2]	No passenger-automobile ceiling [3][5]
Later years	$19,800 in year 2, $11,900 in year 3, $7,160 each year after [2]	Ordinary depreciation on whatever basis remains
Section 179	Counts toward the same ceiling [3]	Capped at $32,000 of the vehicle’s cost for tax years beginning in 2026 [1][3]
Bonus depreciation	Adds $8,000 to the first-year ceiling, which is how $12,300 becomes $20,300 [2]	100% for qualified property acquired and placed in service after January 19, 2025, unless you elect out [3][6]

Two points are easy to miss. First, the passenger-automobile ceilings include the section 179 deduction and the special allowance, so stacking them doesn’t lift a lighter car past $20,300 in its first year [3]. Second, the $32,000 heavy-SUV figure limits only the section 179 portion of the cost [4]. It is not a ceiling on bonus depreciation, which is a separate provision [6]; that is why advisors often look to bonus depreciation, rather than section 179, for a heavy vehicle. Your preparer decides the mix, and section 179 has its own limit: it can’t exceed the taxable income from the active conduct of your trades or businesses for the year, though the disallowed amount carries forward [3][4].

Every ceiling is also reduced by personal use. If the car is used 80% for business, you multiply the maximum by 80% [3]. And the cost that the ceilings hold back isn’t lost; the IRS explains how the unrecovered basis is deducted in later years, including after the normal recovery period, still subject to the annual limit [3].

3. More than 50% business use, or none of this applies

A car is “listed property,” and listed property earns section 179 and bonus depreciation only if it is used more than 50% in a qualified business use [3][5]. At 50% or less, the vehicle must be depreciated under the slower Alternative Depreciation System, with no section 179 deduction and no special allowance [3][5]. What counts matters:

Commuting is personal. The IRS says you can’t deduct depreciation on a car used only for commuting, personal shopping, family vacations, or driving children to school [3].
Investment use doesn’t count toward the 50% test, even though it can be combined with business use when figuring the deduction itself [3].
Someone else driving your car counts as business use only if that use is directly connected with your business, you report its value as income to the driver and withhold where required, or you are paid a fair market rent [3].
Use by a 5% owner or a related person as compensation, or under a lease to them, isn’t qualified business use [3].

The test runs every year, not just the first. If business use later falls to 50% or below, the excess depreciation you took (including section 179) is recaptured as ordinary income [3][5]. For a family that plans to let the business car become the weekend car in year three, that is the line to watch.

4. Placed in service by December 31, not merely ordered

A deduction for 2026 requires that the vehicle be placed in service in 2026, and the IRS defines that as the date the property is ready and available for its specific use [3]. A deposit on an allocation, a signed order for a spring delivery, or a car still in transit doesn’t meet that test. If the year-end deduction is part of the reason for the purchase, ask for delivery, title, and registration before the holidays, and keep the delivery receipt with the date on it.

The acquisition date matters for bonus depreciation too. The 100% allowance covers property acquired after January 19, 2025, and the law’s effective-date rule says property isn’t treated as acquired after the date a written binding contract for it was entered into [6]. A contract signed before that date can change the percentage, so bring the paperwork to your preparer.

A pre-owned car can qualify. Bonus depreciation reaches used property if you never used that vehicle before acquiring it and the purchase meets section 179’s acquisition rules, which exclude, for example, buying from a related person [3][6]. A car you have been driving personally and now “sell” to your own company doesn’t fit that description.

5. The log is the deduction

No depreciation or section 179 deduction is allowed for listed property unless you can prove business use with adequate records or sufficient evidence supporting your own statement [3][7]. The IRS describes what that means: an account book, diary, log, trip sheet, or similar record that, with your receipts, shows the amount of each expense, the business and total mileage for the year, the date, and the business purpose [3]. You don’t need a daily log, but a record made at or near the time of use is far stronger than one reconstructed later; a weekly log that accounts for the week’s use is considered timely [3]. Keep those records for as long as recapture can still occur, which can be any year of the recovery period [3]. An automatic mileage app, a paper logbook in the glovebox, or your calendar plus odometer photos at each month’s end all work, as long as the record is kept as you go.

6. Illinois takes the bonus back, then returns it over time

Illinois doesn’t follow federal bonus depreciation in the year you claim it. Form IL-4562 exists to reverse it: you add back the bonus amount claimed on your federal return, then take Illinois subtractions in later years so that total Illinois depreciation catches up with the federal total over the asset’s life [8]. The form asks for the special depreciation allowance only, not section 179 amounts [8]. For pass-through entities, the addition flows to owners on Schedule K-1-P [8]. The Department of Revenue’s 2026 bulletin also notes that, for tax years beginning on or after January 1, 2026, Illinois decoupled from the new 100% allowance for qualified production property under section 168(n) [9]. The practical effect for an Illinois owner: the federal deduction is front-loaded, the Illinois one arrives more slowly, so budget the state tax accordingly.

7. Leasing instead? The income inclusion

A business that leases rather than buys a passenger automobile doesn’t face the depreciation ceilings directly, but it must add an “inclusion amount” to income each year, which the IRS designed to be substantially equivalent [2]. For leases beginning in 2026, the table starts with vehicles whose fair market value exceeds $62,000 [2]. The consumer-side disclosures on a luxury lease are covered in our guide to leasing a luxury or exotic car.

8. The other taxes on the purchase

Depreciation is the back end. On the front end, an Illinois buyer still pays the state’s tax on the purchase and, for many high-performance cars, the federal gas guzzler tax built into the sticker. Both are explained in our guide to the Illinois tax bill on an exotic or collector car. Insuring a business-owned car for its true value is covered in our exotic-car insurance guide.

Before you sign: a checklist

Photograph the door-jamb certification label and note the GVWR before you commit [10].
Decide with your CPA whether the vehicle is a passenger automobile (ceilings of $20,300/$19,800/$11,900/$7,160 for 2026) or a heavy SUV (section 179 cap of $32,000, bonus depreciation separately) [1][2][3].
Be honest about business use: more than 50%, every year, with commuting counted as personal [3].
Make sure the vehicle is bought in the name of whoever will take the deduction, and don’t sell a car you’ve been driving personally to your own company to create one [6].
Take delivery and register the car by December 31 if you want a 2026 deduction [3].
Start a mileage log on day one and keep it, with receipts, for the full recovery period [3][7].
If you are in Illinois, expect the bonus depreciation add-back on Form IL-4562 [8].
Read the purchase or lease contract as carefully as the tax math; the tax benefit doesn’t make an overpriced car a good buy.

Frequently asked questions

How much of a heavy SUV can be expensed under section 179 in 2026?

Up to $32,000 of the cost, for tax years beginning in 2026, for an SUV rated over 6,000 and up to 14,000 pounds gross vehicle weight. That cap applies to section 179 only; bonus depreciation is a separate provision [1][3][4].

What is the most I can depreciate on a luxury car in its first year?

For a passenger automobile placed in service in 2026, $20,300 if bonus depreciation applies or $12,300 if it doesn’t, including any section 179 deduction, and reduced by your personal-use percentage [2][3].

Does the car have to be delivered by December 31?

Yes. It must be placed in service in the tax year, meaning ready and available for its business use; an order or deposit alone isn’t enough [3].

Does Illinois allow bonus depreciation?

Not in the year you claim it. Illinois requires you to add back federal bonus depreciation on Form IL-4562 and then subtract it over later years [8].