IRS Vehicle Depreciation Rules, Limits, and Methods

IRS vehicle depreciation is calculated in a fixed order: start with the vehicle’s cost, multiply by the share of miles you drive for business, then apply Section 179 expensing, bonus depreciation, and MACRS in sequence until the depreciable basis is recovered. For passenger vehicles placed in service in 2026, the first-year deduction is capped at $20,300 when bonus depreciation applies, regardless of how much the calculation produces. Heavier vehicles rated above 6,000 pounds gross vehicle weight escape that cap, which is why the rules for lighter and heavier vehicles look so different in practice.

Start With Business Use and Cost Basis

Two numbers drive every vehicle depreciation calculation: the cost basis and the business-use percentage.

Cost basis is the purchase price plus sales tax and any capital improvements, such as a work-specific cargo system. Business-use percentage is business miles divided by total miles for the year. Drive 20,000 miles with 14,000 for business and your percentage is 70%. Multiply cost basis by that percentage and you have the depreciable basis that the three methods below work on. Every annual dollar cap is also reduced by the same ratio.

The IRS treats the commute from home to your regular workplace as personal, never business, no matter the distance or whether you take calls on the way. Driving between work locations during the day, visiting clients, or traveling to a temporary job site away from your main office does count.¹ Miscounting commute miles as business miles inflates your percentage and creates audit exposure. Federal tax law only allows deductions for expenses that are “ordinary and necessary” in your trade or business, so the vehicle actually has to do work.²

Depreciation Only Applies if You Choose Actual Expenses

You have a choice each year between the actual expense method and the standard mileage rate, which is 72.5 cents per business mile in 2026.³ The standard rate bakes in depreciation, fuel, insurance, and maintenance, so there is no separate depreciation on top of it. Depreciation only enters the picture if you elect actual expenses.

If you use the standard mileage rate in the vehicle’s first business year, you can switch to actual expenses later. If you start with actual expenses, you generally cannot switch back to the standard mileage rate for that vehicle.⁴ Year one is where the choice locks in.

Section 179 Expensing

Section 179 lets you deduct the cost of qualifying business property in the year it is placed in service rather than spreading it across years. For tax years beginning in 2026, the maximum Section 179 deduction is $2,560,000, and the benefit phases out dollar-for-dollar once total Section 179 property placed in service exceeds $4,090,000. Most small and mid-sized businesses never approach those ceilings.

The limit that actually bites is the business income limitation: your Section 179 deduction cannot exceed the taxable income generated by your active business operations for the year.⁵ If the business earns $40,000 and you elect to expense a $55,000 vehicle, you deduct $40,000 this year and carry the remaining $15,000 forward.

For passenger automobiles at 6,000 pounds or less, the Section 179 deduction is further limited by the annual luxury auto caps described below. For SUVs, trucks, and vans with a gross vehicle weight rating between 6,001 and 14,000 pounds, a separate cap applies: the maximum Section 179 deduction on such a vehicle is $32,000 in 2026. That is lower than the general Section 179 limit but far higher than what a passenger vehicle can absorb in year one.

Bonus Depreciation

Bonus depreciation gives you an immediate first-year deduction of a percentage of the vehicle’s adjusted basis after any Section 179 deduction. The One, Big, Beautiful Bill Act restored a permanent 100% bonus depreciation rate for qualifying property acquired after January 19, 2025.⁶ A vehicle purchased and placed in service after that date can have its entire remaining depreciable basis deducted in year one, still subject to the passenger vehicle caps.

The prior phasedown (80% in 2023, 60% in 2024, 40% under the old 2025 schedule) has been replaced by the permanent 100% rate for property acquired after January 19, 2025. Vehicles acquired on or before that date continue under the old phasedown percentages.⁷

An optional election lets you claim only 40% bonus depreciation on property placed in service during your first tax year ending after January 19, 2025.⁸ Businesses that want to spread deductions across multiple years for income-smoothing use it. For calendar-year filers, the election applies to vehicles placed in service in 2025.

Bonus depreciation requires business use above 50%. Fall to or below that threshold and you lose access to it, along with Section 179, and the recapture rules kick in.

MACRS Handles Whatever Is Left

Whatever Section 179 and bonus depreciation do not consume gets recovered through the Modified Accelerated Cost Recovery System. Business vehicles are 5-year property under MACRS, using the 200% declining balance method, which front-loads the deductions.⁹

Most vehicles use the half-year convention, which treats the vehicle as placed in service at the midpoint of the tax year no matter when you actually started using it. That stretches the 5-year recovery period across six tax years. The percentage of the original depreciable basis deducted each year is:

Year 1: 20.00%
Year 2: 32.00%
Year 3: 19.20%
Year 4: 11.52%
Year 5: 11.52%
Year 6: 5.76%

These percentages apply to the original depreciable basis each year, not the remaining balance, because the table already builds in the switch from declining balance to straight-line. On a $30,000 depreciable basis with no Section 179 or bonus depreciation, year one is $6,000 and year two is $9,600.

Passenger Vehicle Dollar Caps

The luxury auto caps are where most calculations get compressed. A passenger automobile for this purpose is any four-wheeled vehicle made primarily for public roads with an unloaded gross vehicle weight (or gross vehicle weight, for trucks and vans) of 6,000 pounds or less.¹ No matter what Section 179, bonus depreciation, and MACRS calculate to, you cannot exceed the annual cap.

For a passenger automobile placed in service in 2026 with bonus depreciation applied:¹⁰

Year 1: $20,300
Year 2: $19,800
Year 3: $11,900
Year 4 and later: $7,160

Without bonus depreciation, the first-year cap drops to $12,300. Years two, three, and four and beyond stay the same.¹⁰ The $8,000 gap in year one is the additional first-year depreciation that bonus depreciation adds for passenger vehicles.

Apply your business-use percentage to the cap itself. At 80% business use, your first-year cap with bonus depreciation is $16,240. Depreciation that exceeds the cap in a given year is not lost. Once the 5-year MACRS recovery period ends, you keep deducting the unrecovered basis at the “each succeeding year” rate of $7,160 (reduced by business-use percentage) until the full amount is recovered.¹

Worked Example

You buy a $52,000 sedan in March 2026 and use it 100% for business. You elect bonus depreciation. The uncapped calculation would write off the entire $52,000 in year one, but the passenger cap holds the first-year deduction to $20,300. Year two: up to $19,800. Year three: $11,900. Year four and each following year: $7,160 until the full $52,000 is recovered. What could have been a one-year write-off stretches into roughly seven or eight years.

Heavy Vehicles Over 6,000 Pounds

Vehicles with a gross vehicle weight rating above 6,000 pounds are not subject to the passenger vehicle dollar caps. This is the math behind the well-known heavy-SUV strategy. A qualifying SUV, truck, or van can absorb Section 179 up to the $32,000 SUV-specific cap for 2026, then 100% bonus depreciation on the remaining basis, with no annual dollar ceiling clamping the deduction.

For a $70,000 heavy SUV used 100% for business and placed in service in 2026, that is $32,000 of Section 179 plus 100% bonus depreciation on the remaining $38,000, writing off all $70,000 in year one. The GVWR must genuinely exceed 6,000 pounds as rated by the manufacturer, and business use must still exceed 50% to qualify for both Section 179 and bonus depreciation.

Electric Vehicle Basis Reduction

If you claim the Section 30D clean vehicle credit on a business EV or plug-in hybrid, you must reduce the vehicle’s depreciable basis by the amount of the credit.¹¹ A $50,000 EV with a $7,500 credit has a depreciable basis of $42,500 before business-use percentage is applied. Skipping that adjustment overstates depreciation and creates a problem at audit or at sale.

Leasing Replaces Depreciation With a Different Deduction

Depreciation applies only to vehicles you own. If you lease, you deduct the business portion of your lease payments as an operating expense rather than claiming depreciation, and higher-value leased vehicles trigger a separate “lease inclusion amount” adjustment.⁴

Recapture: When the IRS Takes Some Back

The deduction is not permanent in either of two situations.

Business Use Drops to 50% or Below

If your business-use percentage falls to 50% or below in any year after the vehicle is placed in service, you must switch from MACRS to the Alternative Depreciation System (a slower straight-line method) retroactively. The difference between the accelerated depreciation already claimed and what straight-line would have produced is reported as ordinary income in the year of the drop.¹² You also lose bonus depreciation and Section 179 for that vehicle going forward.

Selling a Depreciated Vehicle

When you sell a business vehicle for more than its adjusted basis (original cost minus all depreciation claimed), the gain is taxed as ordinary income up to the total depreciation you took. That is Section 1245 recapture, and the recaptured amount is the lesser of total depreciation claimed or the gain on sale.¹³

Bought a truck for $40,000, claimed $25,000 in depreciation (adjusted basis $15,000), sold for $22,000: the $7,000 gain is all ordinary income because it is less than $25,000 of depreciation. Sold instead for $45,000: $25,000 is ordinary income and the remaining $5,000 above original cost is capital gain. The more aggressive the depreciation, the larger the potential recapture.

Records and Form 4562

The IRS requires a contemporaneous mileage log to substantiate business use. Contemporaneous means entries are made at or near the time of each trip, not reconstructed months later. Each entry should record the date, specific starting point and destination, a concrete business purpose, and the business miles for the trip. Record odometer readings at the beginning and end of the year.

Vehicle depreciation is reported on Form 4562, Depreciation and Amortization.¹⁴ The form captures the vehicle’s cost, date placed in service, business-use percentage, recovery period, and depreciation method. The resulting deduction flows to Schedule C for sole proprietors or to the corresponding line on a partnership or corporate return.

Keep records until the statute of limitations expires for the year you dispose of the vehicle, not just three years after the return that first claimed depreciation.¹⁵ In practice: purchase documents, depreciation schedules, and mileage logs for the entire time you own the vehicle plus at least three years after selling or scrapping it. Discard early and you lose the ability to prove basis and depreciation history if the IRS asks.

1
Internal Revenue Service. Publication 463 (2025), Travel, Gift, and Car Expenses
2
Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses
3
Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile
4
Internal Revenue Service. Topic No. 510, Business Use of Car
5
eCFR. 26 CFR 1.179-2 – Limitations on Amount Subject to Section 179 Election
6
Internal Revenue Service. One, Big, Beautiful Bill Provisions
7
Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One, Big, Beautiful Bill
8
Internal Revenue Service. Notice 2026-11 – Interim Guidance on Additional First Year Depreciation Deduction
9
Internal Revenue Service. Publication 946 (2025), How To Depreciate Property
10
Internal Revenue Service. Rev. Proc. 2026-15
11
Office of the Law Revision Counsel. 26 USC 30D – Clean Vehicle Credit
12
CCH AnswerConnect. MACRS ADS and Depreciation Recapture Required if Passenger Automobile or Listed Property Used 50 Percent or Less for Qualified Business Use
13
Internal Revenue Service. Publication 544, Sales and Other Dispositions of Assets
14
Internal Revenue Service. About Form 4562, Depreciation and Amortization
15
Internal Revenue Service. How Long Should I Keep Records