Can Doctors Really Write Off Luxury Cars? A Guide for Practice Owners

If you’re a physician, dentist or veterinarian, the idea of writing off a luxury car through your practice sounds too good to be true. But in some cases, it’s legitimate.

We’ll go over some changes to the tax code with the One Big Beautiful Bill (OBBB) Act that may or may not allow you to deduct some major vehicle expenses if you’re a practice owner.

And just for fun, we’ll look at some popular luxury cars and discuss whether they’d be eligible for big write offs or not.

Test #1: Proving business use for luxury car Section 179 + bonus depreciation write off

To write off vehicle expenses aggressively, you must justify that the car was used at least 50% of the time for business purposes.

What does that mean? Let’s look at two examples.

If you’re a veterinarian who buys a mobile van to perform at-home pet euthanasia, that vehicle is obviously for business use.

But it’s more difficult to justify if you’re a dentist buying a luxury SUV — unless you’re making house calls.

The home office solution

The most common way to turn your personal vehicle into a business vehicle is by establishing a legitimate home office that you use as a principal place of business.

The space has to be dedicated for that home office purpose, and if the space qualifies, it can turn your non-deductible personal commute into a commute between two business locations (your home office and your practice).

This is the key that unlocks the 50%+ business use requirement for most practice owners.

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Test #2: How heavy is your luxury vehicle?

Any financial advisor will tell you that tax rules aren’t cut and dry. In this situation, there are unique rules for writing off a vehicle based on how heavy that vehicle is.

Vehicles under 6,000 pounds (limited write-off)

With the OBBB Act, the maximum total write-off for lighter vehicles — including bonus depreciation — is capped at $20,200.

This means even the most expensive sports cars get minimal deductions:

Lamborghini Temerario
Porsche 911
Ferrari Enzo

Buy a $300,000 Ferrari, and you can only write off $20,200. Not exactly a game-changer.

Vehicles over 6,000 pounds (full write-off potential)

Heavier vehicles get much better treatment: $31,300 plus up to 100% bonus depreciation.

This means you could potentially write off the entire purchase price if the vehicle is used 100% for business. Here’s a list of three vehicles that could potentially qualify:

Audi SQ8 e-tron (luxury electric SUV)
Some Mercedes G Wagons
BMW X7 SUV

Of course, if you use the vehicle less than 100% for business, you’d have your deduction limited.

The downsides of depreciating your car through your practice

If you write off your entire luxury SUV and sell it two years later, you’ll face a significant tax hit. Here’s why: when you depreciated the vehicle to $0 on your taxes, you'll owe taxes on whatever you sell it for.

Let’s say you paid $150,000 for a luxury SUV, wrote off the whole thing, then sold it two years later for $80,000. You’d likely have to report a gain of $80,000, which would be subject to depreciation recapture.

Other potential scenarios exist where if you stop using the vehicle for business use (for example, you sell the practice, retire and no longer have a business commute), where you could face depreciation recapture events depending on when and how long you’ve used the vehicle.

We’ve also seen problems with folks overclaiming the business use of their vehicle or taking too high of a write off which then requires a tax return correction.

If you plan to keep the vehicle in business use and will hold onto it for at least a few years, you get more of the tax benefit compared to if you’re trading in your vehicle often.

Why most practice owners should not write off their vehicles through their practice

Ultimately the Section 179 deduction and bonus depreciation are only for people who enjoy driving really nice (and heavy) luxury vehicles.

Even if you get to write off federal, state and income-driven repayment (IDR) “income taxes” on your deductible purchase, spending money is still spending money.

For example, let’s compare two scenarios: You buy a $150,000 SUV and claim the full business tax deduction, then keep it for 10 years. Versus buying a $40,000 van without claiming any tax deduction and also keeping it for 10 years.

If you’re in a 50% total tax rate, the luxury SUV costs $75,000 and the new van costs $40,000.

But the vehicle insurance, repairs, importance of keeping the vehicle maintained and washed, and “fussiness” of the luxury SUV are all going to be higher and more expensive to deal with.

So, even though you wrote off a much nicer vehicle, you end up with less money at the end of the 10 year period.

And that’s if everything works out perfectly with your write off.

Comparing not writing off your vehicle to constant deductible trade ins

If you trade in your luxury vehicle every two years, let’s assume the following:

You buy a new SUV every two years for $150,000.
You sell it for $80,000, and write off the $70,000 difference.

The cost to you over five years assuming a 50% tax bracket is:

$80,000 x 5 + $70,000 x (1-0.50) x 5 = $540,000.

Contrast this expense to the new minivan you drive for 10 years, and it costs you $40,000.

Takeaway on writing off luxury vehicles through your practice

Writing off luxury vehicles is easiest if you have a home office to turn your commute between your home and your practice into a business commute.

And it’s easiest to write off a vehicle that’s over 6,000 pounds, which usually puts you into the luxury SUV category of Mercedes, Audi, BMW.

But sports cars are too light to qualify for any enormous write offs.

The big takeaway though should be that it’s only worth fooling around with writing off cars through your practice if you’re a major car person and you love buying fancy cars.

If you’re content with the beat up minivan the kids toss cheerios all over that you wash a few times a year at most, you won’t hurt your long-term wealth growth much at all by skipping the practice car write off and sticking to regular wealth building tasks like recurring brokerage and retirement account contributions while building equity in your practice.

If you need help navigating these types of decisions, check out our SEC Registered Investment Advisory firm SLP Wealth.