If you drive for your business and you’re only claiming the standard mileage rate, you might be leaving thousands of dollars on the table. For business miles driven from July 1 through December 31, 2026, the IRS standard mileage rate is $0.76 per mile (it was $0.725 per mile for the first half of the year). While that deduction is generous, it caps out quickly. Section 179 and bonus depreciation let you deduct a huge chunk of a vehicle’s cost in a single year—sometimes the entire business-use portion of the purchase price. Here’s how it works when you’re self-employed, and when it actually makes sense.```

The two ways to deduct a car (and why depreciation matters)

When you use a vehicle for your freelance or contractor work, the IRS gives you two methods to deduct it. You pick one:

1. Standard mileage rate - you multiply business miles by $0.725 (for 2026) and deduct that.
2. Actual expense method - you deduct the real costs: gas, insurance, repairs, registration, and depreciation on the vehicle itself.

Depreciation only exists under the actual expense method. It’s the IRS letting you write off the cost of the vehicle over time because it loses value as you use it. Normally that write-off is spread across five or six years.

Section 179 and bonus depreciation are the two rules that let you speed that up dramatically, so instead of deducting $6,000 a year for five years, you might deduct $30,000 or more in year one.

What Section 179 actually does

Section 179 lets you deduct the full purchase price of qualifying business equipment in the year you buy it and put it to use, instead of depreciating it slowly.

For 2025, the total Section 179 deduction limit is $2.5 million, so as a freelancer buying one vehicle you’ll never come close to the cap. The real limits that affect you are the vehicle-specific ones below.

Two requirements matter for a vehicle:

• You must use it more than 50% for business.
• It must be placed in service (actually used for work) during the tax year, not just purchased.

If your business use drops below 50% in a later year, the IRS can claw back part of the deduction. More on that at the end.

Bonus depreciation: the other fast write-off

Bonus depreciation works alongside Section 179 and covers whatever cost is left over.

Thanks to the One Big Beautiful Bill Act signed in 2025, 100% bonus depreciation is back and permanent for property placed in service after January 19, 2025. That means for a qualifying vehicle bought and used in 2026, you can potentially deduct 100% of the business-use portion in the first year.

The order usually goes: apply Section 179 first, then bonus depreciation on the rest, then regular depreciation on anything remaining. For most single-vehicle purchases, Section 179 plus bonus can wipe out the deductible cost in one shot.

But there’s a big catch that depends on how heavy your vehicle is.

The 6,000-pound rule changes everything

This is the part that decides whether you deduct $20,000 or $80,000.

The IRS puts strict caps on depreciation for regular passenger vehicles, cars, small SUVs, and crossovers with a gross vehicle weight rating (GVWR) under 6,000 pounds. These are the Section 280F “luxury auto” limits.

For a passenger vehicle placed in service in 2025, the first-year depreciation cap (with bonus depreciation) was roughly $20,400. The 2026 figure is indexed slightly higher but sits in the same range. So even if you buy a $60,000 sedan and use it 100% for business, your first-year write-off is capped around $20,000. The rest gets deducted in future years.

Now here’s where it changes:

Vehicles with a GVWR over 6,000 pounds are exempt from the passenger auto caps. This covers a lot of full-size SUVs, pickup trucks, and cargo vans. The GVWR is printed on a sticker inside the driver’s side door.

For these heavier vehicles:

• If it’s an SUV between 6,000 and 14,000 pounds GVWR, your Section 179 deduction is capped at about $31,300 (the 2025 SUV limit, indexed for 2026). But you can then apply 100% bonus depreciation to the remaining cost, which for most people means the full business-use amount is still deductible in year one.
• If it’s a pickup truck with a cargo bed at least six feet long, or a cargo van with no rear seating, the SUV cap doesn’t even apply. You can potentially Section 179 the whole thing.

So the same $65,000 spent on a heavy work truck used 100% for business could produce a $65,000 first-year deduction, while $65,000 spent on a luxury sedan produces about $20,000. The weight sticker is worth checking before you buy.

Business-use percentage is everything

Every number above assumes 100% business use. Almost nobody hits that with a vehicle.

Your deduction is multiplied by your business-use percentage. If you buy a $60,000 qualifying SUV but use it 70% for business, your deductible base is $42,000, not $60,000.

And remember: you must use the vehicle more than 50% for business to claim Section 179 or bonus depreciation at all. At 50% or below, you’re stuck with slower straight-line depreciation.

This is why your mileage records matter so much. Your business-use percentage is calculated from business miles divided by total miles. Without a log, you can’t prove the percentage, and the IRS can deny the whole deduction.

You have to choose in year one

Here’s a rule that trips people up. If you want to use depreciation, Section 179, or bonus depreciation on a vehicle, you have to choose the actual expense method in the first year you use that car for business.

If you take the standard mileage rate in year one, you can switch to actual expenses later, but you’re then locked into a slower straight-line depreciation schedule for that vehicle. You lose access to Section 179 and bonus depreciation on it.

So the decision to accelerate depreciation is a first-year decision. Get it right before you file.

Also worth knowing: the standard mileage rate already has a depreciation component baked into it. You can’t take the $0.725 per mile and separately deduct depreciation. It’s one method or the other.

The part nobody warns you about: recapture

Taking a giant deduction feels great in year one. Just know the trade-off.

If your business use of the vehicle drops to 50% or below in a later year, the IRS makes you “recapture” part of the accelerated depreciation, meaning you add some of it back to your income and pay tax on it. This happens if you start using the car mostly for personal driving, or if your business slows down.

The same applies if you sell the vehicle. Because you deducted the cost quickly, the sale can trigger a taxable gain. It’s not a reason to avoid the deduction, just a reason to keep tracking your business use every single year, not only the year you buy.

Where this goes on your taxes

As a sole proprietor or single-member LLC, vehicle depreciation flows through your Schedule C. Section 179 gets calculated on Form 4562 first, then carries over. Your car and truck expenses land in Part II of Schedule C, and larger depreciation shows up in Part IV or on Form 4562.

Because this is a real business expense, it also reduces the income subject to self-employment tax, not just income tax. A $30,000 deduction can save you the 15.3% self-employment tax on that amount plus your income tax bracket.

Keep the records or lose the deduction

Big deductions get attention. To defend a vehicle depreciation claim, you need:

• A mileage log showing business vs. personal miles, ideally contemporaneous. See the actual IRS mileage log requirements for what counts.
• The purchase documents showing price and the date placed in service.
• The GVWR if you’re claiming the heavy-vehicle treatment.
• Receipts for any other actual expenses if you’re not itemizing every line.

Sloppy records are the fastest way to turn a $30,000 deduction into a disallowed one, plus penalties. This is exactly the kind of thing to nail down as you learn to separate personal and business expenses and track business expenses the right way.

Vehicle depreciation is one of the most powerful deductions available to self-employed people, but it lives or dies on your business-use percentage, and that comes straight from your mileage records.

numlr automatically tracks your business miles and total miles so you always know your exact business-use percentage when it’s time to claim Section 179 or bonus depreciation on your vehicle. Try numlr free.