Vehicle Depreciation for Business: The Rules

If your car, truck, or van earns its keep in your business, the IRS lets you recover its cost over time through vehicle depreciation — a powerful but rule-heavy deduction that can shave thousands off your taxable income. The catch is that the numbers move every year, and the wrong assumption can trigger a costly recapture later. This guide walks through how the mechanisms actually work so you can plan with confidence.

Vehicle depreciation lets a business deduct the cost of a car or truck used for work over its useful life. The deduction depends on business-use percentage, the depreciation method (MACRS, Section 179, or bonus), and annual luxury-auto caps set by the IRS for each tax year.

How depreciating a business vehicle works

When you buy a vehicle for your business, you generally cannot deduct the full purchase price in the year you buy it. Instead, the tax code treats the vehicle as a capital asset and lets you recover its cost gradually. That recovery is depreciation. The amount you can claim each year depends on three things: how much you paid, how much you use the vehicle for business, and which depreciation method you elect. Several methods can stack — for example, you might combine Section 179 expensing, bonus depreciation, and regular business deductions under MACRS in the same return. Choosing the right mix is where real tax planning pays off, because the order and amount you claim affects both this year’s bill and your deduction in future years.

The business-use percentage requirement

You can only depreciate the portion of a vehicle used for business. If you drive 12,000 miles in a year and 9,000 of those are for work, your business-use percentage is 75%, and only 75% of the cost basis is eligible for depreciation. Two thresholds matter most. First, to use accelerated methods like Section 179 or the declining-balance MACRS schedule, business use must exceed 50%. Drop to 50% or below and you are limited to slower straight-line depreciation. Second, commuting from home to your regular workplace never counts as business mileage. Personal errands, family trips, and that commute all dilute your percentage, so honest tracking is essential.

The luxury-auto depreciation caps

Because Congress did not want taxpayers writing off exotic cars at full speed, passenger vehicles are subject to annual “luxury auto” depreciation limits under Section 280F. These caps put a dollar ceiling on how much depreciation — including any bonus depreciation — you can claim in the first year and in each year afterward, regardless of how expensive the car is or which method you choose. The IRS publishes a fresh set of these caps every tax year, and they typically rise modestly with inflation, with a higher first-year figure when bonus depreciation applies. Because these numbers change annually, always confirm the current limits for your specific tax year on IRS.gov before you file. The caps apply to cars and most smaller trucks and vans rated at 6,000 pounds gross vehicle weight or less.

Section 179 and the heavy-SUV (over 6,000 lb) angle

Section 179 lets a business elect to expense the cost of qualifying property up front rather than depreciating it slowly. For passenger vehicles under 6,000 pounds, the luxury-auto caps above still limit what Section 179 can deliver. But here is the planning angle business owners care about: SUVs, trucks, and vans with a gross vehicle weight rating above 6,000 pounds escape the strict passenger-auto caps. Instead, heavy SUVs are subject to a separate, much higher Section 179 expensing limit that the IRS sets each year. This is why you often hear about businesses buying a large SUV or pickup near year-end. The vehicle must still be used more than 50% for business, the deduction cannot exceed your business income, and the per-vehicle and overall Section 179 dollar limits change annually — so verify the current figures on IRS.gov for the tax year in question.

Bonus depreciation

Bonus depreciation is a separate accelerator that lets you deduct a large percentage of an asset’s cost in the first year, on top of or instead of Section 179. The key feature is that the bonus percentage is scheduled to change from year to year. It has stood at 100% in some years and has been phasing down in steps in others, so the percentage you can claim depends entirely on the tax year the vehicle was placed in service. Bonus depreciation applies automatically unless you elect out, and for passenger vehicles it is still squeezed by the Section 280F luxury-auto first-year cap. Because the applicable percentage is a moving target, confirm the rate for your placed-in-service year on IRS.gov rather than relying on a figure you remember from a prior return.

MACRS: the default recovery system

If you do not elect Section 179 or bonus depreciation — or after those deductions are used up — the remaining basis is recovered under the Modified Accelerated Cost Recovery System, or MACRS. Vehicles are generally five-year property, meaning the cost is written off over a six-year span (because of the half-year or mid-quarter convention that splits the first year). MACRS front-loads the deduction using a declining-balance method, giving you larger write-offs in the early years that taper over time. If business use ever falls to 50% or less, you must switch to the slower straight-line MACRS method for the rest of the vehicle’s recovery period.

Actual-expense method versus standard mileage

Vehicle depreciation only enters the picture if you choose the actual-expense method, where you deduct your real costs — fuel, insurance, repairs, registration, and depreciation. The alternative is the standard mileage rate, a per-mile figure the IRS sets each year that bundles a built-in depreciation allowance into one simple number. You cannot claim separate depreciation and the standard mileage rate for the same vehicle in the same year. Generally, if you want to claim Section 179 or bonus depreciation, you must use actual expenses in the first year the vehicle is in service. Many owners run the math both ways, because actual expenses tend to win for pricey vehicles while the mileage rate often wins for high-mileage, low-cost cars.

Recapture if business use drops

Accelerated deductions come with a string attached. If your business use of the vehicle falls to 50% or below before the end of the recovery period — or if you sell the vehicle for more than its depreciated basis — the IRS can “recapture” some of the deductions you took. In practice, recapture adds part of your earlier write-offs back into income, effectively reversing the benefit you accelerated. This is the trap that catches owners who load up on Section 179 or bonus depreciation and then shift the vehicle mostly to personal use a year or two later. Plan for the full holding period, not just the first big deduction.

Recordkeeping that survives an audit

Every vehicle deduction lives or dies on documentation. The IRS expects a contemporaneous mileage log showing the date, destination, business purpose, and miles for each trip, plus your total annual mileage to compute the business-use percentage. Keep receipts for the purchase, fuel, repairs, and insurance if you use actual expenses. A mileage-tracking app, a logbook in the glovebox, or a calendar export all work — what matters is that the record is consistent and created close to the time of travel. Without it, even a legitimate deduction can be disallowed.

A worked example (with placeholders)

Suppose [Client Name] buys a qualifying heavy SUV (GVWR over 6,000 lb) for [$VEHICLE_COST] and places it in service in [TAX_YEAR]. The vehicle is used [BUSINESS_USE_%] for the business — comfortably above 50%. Only the business-use share of the cost, [$ELIGIBLE_BASIS], is depreciable. Because the SUV exceeds 6,000 pounds, it sidesteps the passenger luxury-auto caps and may qualify for the higher heavy-SUV Section 179 limit of [$179_LIMIT for TAX_YEAR]. Any basis left after Section 179 could then take bonus depreciation at [BONUS_% for TAX_YEAR], with the remainder recovered under five-year MACRS. The exact figures depend entirely on the limits in force for that tax year, so confirm them on IRS.gov before filing.

Mistakes to avoid

• Counting your commute as business miles. Home-to-office driving is personal and inflates your percentage illegitimately.
• Assuming last year’s numbers still apply. Luxury-auto caps, Section 179 limits, and the bonus percentage all reset annually.
• Stacking the standard mileage rate and depreciation on the same vehicle in the same year — you must pick one.
• Ignoring the 50% test. Falling below it forces slower straight-line depreciation and can trigger recapture.
• Skipping the mileage log. No contemporaneous record, no reliable deduction.
• Overlooking the income limit. Section 179 cannot create a business loss.

Frequently asked questions

How many years does vehicle depreciation take?

Most business vehicles are five-year property under MACRS, but the half-year convention spreads the write-off across six calendar years. Section 179 and bonus depreciation can compress much of that into year one, subject to the annual caps for your tax year.

Can I use vehicle depreciation if I lease instead of buy?

No. Depreciation applies to vehicles you own. If you lease, you deduct lease payments under the actual-expense method, reduced by an IRS “lease inclusion” amount for higher-value vehicles, or you use the standard mileage rate instead.

Do the luxury-auto caps apply to my pickup truck?

It depends on weight. Vehicles rated at 6,000 pounds gross vehicle weight or less are subject to the passenger luxury-auto caps. Trucks and SUVs above 6,000 pounds follow the separate heavy-vehicle rules with higher Section 179 limits. Check the rating on the door-jamb sticker.

What happens if I sell the vehicle?

If you sell for more than the depreciated basis, the gain attributable to prior depreciation is generally recaptured and taxed as ordinary income. The actual outcome depends on your basis, sale price, and how much depreciation you claimed, so review the sale with your tax advisor.

Can I switch from the standard mileage rate to actual expenses later?

Generally you can switch from standard mileage to actual expenses in a later year, but you must then use straight-line depreciation for the vehicle’s remaining life. You cannot switch the other direction if you claimed accelerated depreciation or Section 179 in year one. Rules are specific, so confirm the current guidance on IRS.gov.

Get your vehicle depreciation strategy right

Vehicle depreciation can be one of the most valuable deductions a business owner claims — or one of the most expensive mistakes if the caps, methods, and recapture rules are misapplied. Tranzesta helps US and UK business owners choose the method that maximizes today’s deduction without setting up a painful recapture tomorrow. Ready to put a vehicle to work for your tax bill the right way? Book a free consultation and we’ll map out the smartest approach for your situation.

For authoritative detail, see the IRS guidance on Publication 463, Travel, Gift, and Car Expenses and the rules in Publication 946, How to Depreciate Property.

Disclaimer: This article is for general informational purposes only and does not constitute tax, legal, or accounting advice. Tax rules, depreciation caps, Section 179 limits, and bonus depreciation percentages change every tax year. Always confirm current figures on IRS.gov and consult a qualified professional about your specific circumstances before acting.