Truck Depreciation for Owner-Operators: Section 179, Bonus Depreciation, and MACRS

A Class 8 tractor is typically the single largest purchase an owner-operator will make, and the way you recover that cost on your tax return determines how much tax you pay not just in the year you buy it, but for the next five years. The IRS gives you three mechanisms to deduct the cost of a truck: Section 179 expensing, bonus depreciation, and MACRS (the Modified Accelerated Cost Recovery System). You can use one, two, or all three on the same truck in the same year. Each mechanism has different dollar limits, different income limitations, and different consequences when you eventually sell or trade the truck. A $180,000 tractor can produce a $180,000 deduction in year one, or it can produce a $36,000 deduction in year one and smaller deductions over the next four years. The difference between those two outcomes is tens of thousands of dollars in cash flow, and the choice that saves the most tax depends on your income level, your entity structure, your state, and whether you plan to keep the truck or turn it over in three years.

What are the MACRS recovery periods for trucks, trailers, and equipment?

MACRS is the default depreciation system for business property. Every depreciable asset is assigned to a recovery class based on its type, and the recovery class determines how many years the cost is spread across. For trucking, the most relevant classifications are straightforward, but getting the class wrong (or letting software default to the wrong one) results in slower cost recovery and a higher tax bill in the early years.

Over-the-road tractors, the Class 8 trucks that owner-operators buy, are classified as 5-year property under MACRS Asset Class 00.26 (tractor units for use over the road). This includes Freightliner Cascadias, Peterbilt 579s, Kenworth T680s, and every other semi-tractor used in for-hire or private carriage. The 5-year classification applies regardless of whether the truck is new or used.

Trailers (dry vans, reefers, flatbeds, tankers) are also 5-year property. Many owner-operators lease trailers from their carrier, but if you own a trailer outright, you depreciate it on the same schedule as the tractor.

Light-duty trucks under 6,000 lbs gross vehicle weight (GVW) are technically 5-year property too, but they’re subject to the luxury automobile limits under IRC 280F. Those limits cap the annual depreciation deduction regardless of the truck’s actual cost. For 2025, the first-year cap is $20,400 when bonus depreciation is claimed, then $19,800 in year two, $11,900 in year three, and $7,160 for each year after that until the cost is fully recovered. These caps are designed for passenger vehicles, but the IRS applies them to any four-wheeled vehicle under 6,000 lbs GVW, including pickup trucks and SUVs in that weight range.

Trucks between 6,001 and 14,000 lbs GVW (think a Ford F-250 or RAM 2500 with the right options) are exempt from the luxury auto caps. They can be fully expensed under Section 179 or bonus depreciation in year one, with no annual dollar limit on the depreciation deduction. The SUV limitation under Section 179 caps the 179 deduction at $30,500 (2025) for vehicles over 6,000 lbs GVW that are classified as SUVs, but this SUV cap does not apply to trucks with an open cargo bed or a fully enclosed driver’s compartment that is separate from the payload area (i.e., most commercial pickups and work trucks).

Heavy trucks over 14,000 lbs GVW (which includes virtually every Class 8 tractor) have no luxury auto limitations at all. No annual cap, no SUV limit, no listed property complications. The full cost is eligible for Section 179, bonus depreciation, or MACRS without restriction. This is the category that matters for most owner-operators.

Equipment that’s attached to or used with the truck has its own classification. APUs (auxiliary power units) installed on the tractor are part of the truck’s cost if installed at the time of purchase, or a separate 5-year asset if added later. Reefer units on refrigerated trailers are typically 5 to 7 year property depending on whether they’re classified with the trailer or as standalone equipment. Liftgates, inverters, and cab accessories are generally treated as part of the vehicle if installed at the time of acquisition, or as separate assets in the appropriate class if purchased and installed later.

The depreciation method under MACRS for 5-year property is 200% declining balance (also called double-declining balance) with a switch to straight-line when straight-line produces a larger deduction. The half-year convention applies by default, which means the IRS treats the truck as placed in service at the midpoint of the year regardless of when you actually start using it. In practice, this means a truck bought in January and a truck bought in November both get the same first-year MACRS deduction. The exception: if more than 40% of all assets you place in service during the year are placed in service in the fourth quarter, the mid-quarter convention applies instead, which reduces the first-year deduction for those Q4 assets.

Under straight MACRS with the half-year convention and no accelerated elections, the depreciation percentages for a 5-year asset are: 20.00% in year one, 32.00% in year two, 19.20% in year three, 11.52% in year four, 11.52% in year five, and 5.76% in year six (the sixth year catches the other half of the half-year convention from year one). On a $180,000 tractor, that’s $36,000 in year one, $57,600 in year two, and so on. Most owner-operators don’t use straight MACRS alone because Section 179 and bonus depreciation allow the full deduction in year one, but understanding the baseline matters when you’re deciding whether to defer the deduction or when your state doesn’t conform to federal accelerated depreciation.

How does Section 179 work for trucks?

IRC 179 lets you elect to expense the full cost of qualifying property in the year it’s placed in service, instead of depreciating it over the recovery period. For an owner-operator buying a truck, Section 179 is one of two ways to deduct the entire cost in year one (the other being bonus depreciation), and the election is made on Form 4562 filed with your return.

The 2025 limits: the maximum Section 179 deduction is $1,250,000, and the deduction begins to phase out dollar-for-dollar when total qualifying property placed in service during the year exceeds $3,130,000. For a single-truck owner-operator buying one tractor and maybe a trailer, you’re nowhere near the phase-out. The $1,250,000 ceiling is more than enough to cover the full cost of any Class 8 truck on the market.

The limitation that actually bites is the taxable income cap. Section 179 cannot reduce your taxable income from active trades or businesses below zero. It cannot create or increase a net operating loss. If you buy a $180,000 truck and your Schedule C income (before the 179 deduction) is $120,000, your Section 179 deduction is limited to $120,000. The remaining $60,000 of the truck’s cost isn’t lost; it carries forward as unused Section 179 deduction to future years, or (more commonly) it’s picked up by bonus depreciation, which has no income limitation.

The Section 179 election is made on a per-asset basis. You choose which specific assets to expense under 179 and which to leave for bonus depreciation or MACRS. Once made, the election is revocable only with IRS consent (which is rarely granted). This isn’t usually a concern for an owner-operator buying one truck, but it matters if you’re also purchasing a trailer, APU, or other equipment in the same year and need to manage the income limitation across multiple assets.

One detail that matters for owner-operators running under their own authority: the business must be actively conducted for Section 179 to apply. Merely owning a truck that sits in the yard doesn’t qualify. The truck must be placed in service, meaning it must be ready and available for use in the business. A truck bought in December and not dispatched until January is placed in service in January, not December.

How does 100% bonus depreciation work after OBBBA?

IRC 168(k) provides for an additional first-year depreciation deduction, commonly called bonus depreciation. The One Big Beautiful Bill Act (OBBBA, Pub. L. 119-21, signed July 4, 2025) made 100% bonus depreciation permanent for qualifying property acquired and placed in service after January 19, 2025. This reversed the phase-down schedule that had been in effect under the Tax Cuts and Jobs Act: 80% for property placed in service in 2023, 60% in 2024, and what would have been 40% in 2025 without the new law.

For an owner-operator who buys a truck after January 19, 2025, bonus depreciation means the entire cost of the truck is deductible in the year it’s placed in service. No dollar cap. No taxable income limitation. The deduction can create or increase a net operating loss, which Section 179 cannot do.

Bonus depreciation applies to new and used trucks. Before the Tax Cuts and Jobs Act of 2017, bonus depreciation was limited to new property (original use had to begin with the taxpayer). TCJA expanded it to include used property, and OBBBA preserved that expansion. The only requirements for used property are: (1) the taxpayer has not previously used the specific truck, and (2) the truck is not acquired from a related party under IRC 179(d)(2) cross-referenced through the 168(k) rules. Buying a used Kenworth from a dealer, from another owner-operator, or at auction all qualify. Buying a truck from your own S-corp or from your spouse does not.

Bonus depreciation applies automatically to all qualifying property unless the taxpayer elects out. The election out is made by asset class (all 5-year property, all 7-year property), not by individual asset. If you want to elect out of bonus depreciation for the truck but claim it on other equipment, you’re stuck: you’d have to elect out of bonus depreciation for all 5-year property. This rigidity is why the Section 179 election (which is per-asset) matters as a planning tool even when bonus depreciation is available.

The practical impact of OBBBA for trucking is enormous. An owner-operator buying a $200,000 tractor in 2025 or later can deduct the full $200,000 in year one. At a combined marginal rate of 30% to 37% (federal income tax plus self-employment tax), that deduction is worth $60,000 to $74,000 in tax savings. The truck is still on the road earning revenue, but the tax cost has been fully recovered.

What are the ordering rules, and why do they matter?

The IRS requires depreciation to be calculated in a specific order: Section 179 first, then bonus depreciation on the remaining adjusted basis, then regular MACRS on whatever is left after that. This ordering matters because Section 179 and bonus depreciation have different limitations, and the interaction determines the total first-year deduction and the tax consequences in later years.

Here’s how the ordering works in practice. Suppose you buy a $200,000 truck and your taxable income from active businesses is $130,000.

Step 1: Section 179. You elect to expense the truck under Section 179. The deduction is limited to $130,000 (your taxable income). The truck’s adjusted basis for further depreciation is $200,000 minus $130,000 = $70,000.

Step 2: Bonus depreciation. 100% bonus depreciation applies to the remaining $70,000 basis. There’s no taxable income limitation for bonus depreciation, so the full $70,000 is deductible. This pushes your taxable income below zero, creating or increasing a net operating loss.

Step 3: MACRS. After Section 179 and bonus depreciation, the remaining basis is $0. Nothing left for MACRS.

Total first-year deduction: $200,000. Net taxable income: $130,000 minus $200,000 = negative $70,000 (a net operating loss of $70,000 before considering other income or deductions).

When the owner-operator’s taxable income exceeds the truck’s cost, the ordering is irrelevant to the total deduction. A driver with $250,000 in income buying a $180,000 truck can take the full $180,000 under Section 179 alone, or under bonus depreciation alone, or split between the two. The total deduction is $180,000 either way. The ordering matters only when the taxable income limitation under Section 179 is binding, when the state doesn’t conform to one of the methods, or when entity-level pass-through rules create differences.

Do used trucks qualify for Section 179 and bonus depreciation?

Yes, and this is one of the most important planning facts for owner-operators. The used truck market is where most drivers buy, and both Section 179 and bonus depreciation apply to used property.

For Section 179, used property has always been eligible. IRC 179(d)(1) defines qualifying property as tangible personal property acquired by purchase for use in the active conduct of a trade or business. It doesn’t distinguish between new and used. The “acquired by purchase” requirement means you can’t expense property received as a gift, inherited, or acquired from a related party (as defined in IRC 267 and IRC 707(b)). A used truck bought from a dealer, at auction, or from an unrelated owner-operator qualifies.

For bonus depreciation, used property became eligible starting with property acquired after September 27, 2017, under the TCJA expansion. Before that, bonus depreciation required “original use” to begin with the taxpayer (i.e., new property only). The TCJA removed the original-use requirement, and OBBBA preserved the expansion. Under current law, the requirements for bonus depreciation on used property are: (1) the taxpayer has not previously used the specific property, and (2) the property is not acquired from a related party. “Previously used” means you personally used it before, not that it was used by someone else. If you sold a truck two years ago and now want to buy it back, you’ve previously used it and it doesn’t qualify for bonus depreciation (though it would still qualify for Section 179 and regular MACRS).

The related-party restriction prevents abuse. You can’t sell a truck to your brother-in-law and have him claim bonus depreciation, then buy it back. Related parties include family members (spouse, ancestors, descendants, siblings), entities you control (more than 50% ownership), and members of a controlled group. The rules are defined in IRC 267(b) and IRC 707(b).

For the typical owner-operator buying a used truck from a dealer or private seller, both Section 179 and bonus depreciation are available without restriction. The tax treatment is identical to a new truck.

What happens when I sell, trade, or scrap the truck?

Every dollar of depreciation you claimed on the truck comes back as ordinary income when you dispose of it. This is depreciation recapture under IRC 1245, and it applies regardless of whether the depreciation was taken under Section 179, bonus depreciation, or MACRS. The recapture isn’t a penalty; it’s the natural consequence of having deducted the cost up front and then receiving proceeds when the asset is sold.

The math is straightforward. The truck’s adjusted basis equals the original cost minus all depreciation claimed. If you bought a truck for $180,000 and deducted the full $180,000 in year one (via Section 179, bonus depreciation, or both), the adjusted basis is $0. When you sell the truck for $60,000, the entire $60,000 is gain, and under IRC 1245, all of that gain is ordinary income, not capital gain. It’s reported on Form 4797, and it’s taxed at your regular income tax rates plus self-employment tax if you’re a sole proprietor or single-member LLC.

One critical change from prior law: under IRC 1031, like-kind exchanges are now limited to real property only. Before the Tax Cuts and Jobs Act (effective for exchanges completed after December 31, 2017), an owner-operator could trade one truck for another and defer the gain under Section 1031. That option no longer exists for personal property. A trade-in of a truck at a dealer is now treated as a sale of the old truck (gain recognized, recapture triggered) and a purchase of the new truck (new depreciable basis at full cost). The gain on the old truck and the depreciation on the new truck are separate transactions reported separately on the return.

If you trade a truck with a $0 basis for $50,000 in credit toward a $190,000 replacement, you recognize $50,000 of ordinary income on the trade-in and establish a $190,000 depreciable basis on the new truck. If you claim 100% bonus depreciation on the new truck, your net deduction for the year is $190,000 minus $50,000 of recapture income = $140,000, which is exactly the cash out of pocket ($190,000 minus $50,000 trade-in credit).

Is a lease-purchase the same as buying for depreciation purposes?

It depends on how the IRS classifies the arrangement, and the classification determines whether you get Section 179 and bonus depreciation or deductible lease payments, but not both.

Many owner-operators acquire their trucks through lease-purchase programs offered by carriers, dealers, or leasing companies. These programs look like leases on the surface (you make monthly payments and use the truck), but the tax treatment depends on whether the IRS considers the arrangement a true lease or a conditional sale (also called a financing arrangement or a capital lease for tax purposes).

A lease-purchase that transfers ownership at the end for a nominal amount (a $1 buyout, or a buyout substantially below fair market value) is a conditional sale. The IRS treats the transaction as if you purchased the truck on the first day and financed the purchase price through monthly payments. That means you capitalize the truck at its fair market value (or the total of payments if no separate price is stated), claim Section 179 or bonus depreciation on the full capitalized cost, and treat each monthly payment as part interest (deductible as interest expense) and part principal (not separately deductible, because it’s already been recovered through depreciation). The depreciation deduction is available in year one, even though you haven’t finished paying for the truck.

A true lease (fair market value buyout option at the end, the lessor retains meaningful residual risk, the lease term is substantially shorter than the truck’s useful life) results in deductible lease payments. Each monthly payment is a business expense on Schedule C. You don’t depreciate the truck because you don’t own it for tax purposes. You also don’t get Section 179 or bonus depreciation, because those elections require ownership. The total deduction over the lease term may be similar to the depreciation deduction, but the timing is different: lease payments are deducted evenly over the term, while Section 179 and bonus depreciation concentrate the deduction in year one.

If you’re in a lease-purchase program and aren’t sure how it’s classified, look at the buyout terms. A $1 buyout (or any buyout that’s clearly below market value) means the IRS will treat it as a purchase. A buyout equal to or near the truck’s expected fair market value at the end of the term suggests a true lease. Many carrier-sponsored lease-purchase programs are structured with nominal buyouts, which means the driver should be claiming depreciation, not lease payments. Getting this classification wrong can mean overpaying taxes for years (if you’re deducting lease payments but should be taking bonus depreciation) or underreporting income (if you’re claiming depreciation but the arrangement is really a lease and you don’t actually own the truck for tax purposes).

When should I NOT take the full depreciation deduction in year one?

Taking the biggest possible deduction in the first year isn’t always the right move. There are several situations where spreading the depreciation over the MACRS recovery period produces a better after-tax result.

Low income in the current year. If you’re in a low tax bracket this year but expect higher income in future years (maybe you’re just starting out, or you had a slow year, or you had significant expenses that already pushed your taxable income down), the depreciation deduction is worth less per dollar in a low bracket than it would be in a higher bracket next year. A $180,000 deduction at a 12% marginal rate saves $21,600. The same $180,000 deduction at a 32% marginal rate saves $57,600. If you’re confident your income will rise (because you’ve signed a better contract, you’re adding a second truck, or you’re transitioning from company driver to owner-operator and expect full-year revenue next year), deferring some depreciation to the higher-income year can save significantly more tax over the two-year window.

The NOL problem. Bonus depreciation can create a net operating loss, and an NOL that’s larger than you can use efficiently is a timing drag. Under current law (post-TCJA), NOLs can be carried forward indefinitely but can only offset 80% of taxable income in the carryforward year. If a $180,000 bonus depreciation deduction creates a $100,000 NOL and your income next year is $90,000, you can only use $72,000 of the NOL (80% of $90,000). The remaining $28,000 carries forward again. You’ll eventually use all of it, but you’re lending the government money interest-free until you do. In some cases, taking MACRS depreciation and avoiding the oversized NOL produces a better present-value result.

QBI deduction interaction. The qualified business income (QBI) deduction under IRC 199A allows a 20% deduction on qualified business income from pass-through entities and sole proprietorships. But QBI is calculated after Section 179 and depreciation. If you take the full $180,000 in Section 179 and bonus depreciation and your QBI drops to $0 (or goes negative), you lose the 20% QBI deduction for the year. The lost QBI deduction doesn’t carry forward. In some income ranges, the optimal strategy is to take just enough depreciation to reduce taxable income to the top of the current bracket while preserving enough QBI to get the full 20% deduction. This requires running the numbers both ways, and it’s bracket-dependent.

State nonconformity. Several states don’t conform to federal bonus depreciation. California, for example, doesn’t allow bonus depreciation at all and limits Section 179 to $25,000. If you’re domiciled in a nonconforming state (or if your trucking business creates nexus in one), the depreciation timing difference between your federal and state returns creates a permanent tracking burden. Some owner-operators choose to limit federal accelerated depreciation to match the state treatment, simplifying the multi-year reconciliation. This is a convenience trade-off, not a tax-savings strategy, but it’s a legitimate consideration for drivers who do their own books.

Planning to sell the truck soon. If you know you’ll sell or trade the truck within two or three years, taking the full deduction in year one and then recognizing the recapture income on the sale produces a large swing: a big deduction followed by a big income hit. If the sale falls in a year when your other income is also high (good hauling year plus truck sale), the combined income could push you into a higher bracket. Spreading depreciation over the 5-year MACRS schedule keeps both the deductions and the eventual recapture smaller and more predictable.

None of these situations mean you should never take accelerated depreciation. They mean you should run the multi-year projection before defaulting to the maximum first-year deduction. The best depreciation strategy depends on the specific tax picture over the truck’s ownership period, not just year one.

How do I report truck depreciation on my tax return?

Depreciation is reported on Form 4562 (Depreciation and Amortization) and the resulting deduction flows to Schedule C (line 13) for sole proprietors and single-member LLCs, or to the appropriate line on Form 1065 (partnership) or Form 1120-S (S corporation) for other entity types.

Part I of Form 4562 handles the Section 179 election. You list each asset you’re expensing under Section 179, its cost, and the amount elected. The total Section 179 deduction is limited by the dollar cap ($1,250,000 for 2025), the phase-out threshold ($3,130,000), and your taxable income from active businesses.

Part II handles bonus depreciation. You list assets eligible for the special depreciation allowance (which is the official name for bonus depreciation) and apply the 100% rate to the cost (or the remaining cost after Section 179, if you elected 179 on the same asset).

Part III handles regular MACRS for any remaining depreciable amount.

For the truck specifically, you also need to consider Part V (Listed Property). Vehicles are listed property under IRC 280F, which requires the taxpayer to substantiate business use with records. However, trucks over 14,000 lbs GVW (which includes all Class 8 tractors) are exempt from the listed-property substantiation requirements and from the luxury auto depreciation caps. You still report the truck on Form 4562, but the listed-property limitations don’t restrict the deduction.

When you sell or dispose of the truck, the depreciation recapture is reported on Form 4797 (Sales of Business Property). Section 1245 recapture converts the gain to ordinary income to the extent of prior depreciation deductions.

The most common errors on owner-operator returns related to depreciation: (1) classifying the truck as 7-year property instead of 5-year property, (2) applying the luxury auto caps to a Class 8 tractor that’s exempt, (3) failing to claim bonus depreciation on a used truck (some preparers still think bonus depreciation is only for new property), (4) deducting lease payments on a lease-purchase that should be treated as a conditional sale (missing the Section 179/bonus depreciation opportunity), and (5) failing to report recapture on disposition.

What should I do next?

If you’re buying a truck this year, the depreciation decision needs to be made before you file, not at filing time. The truck’s cost, your expected taxable income, your entity structure, and your state’s conformity rules all feed into the analysis. If you’ve already bought and you’re not sure how the depreciation was claimed on prior returns, pull Form 4562 from the last filed return and check whether Section 179 or bonus depreciation was elected, and whether the correct recovery period (5 years, not 7) was used.

These guides cover the related topics in detail:

• Owner-operator tax deductions, the full list of deductions beyond depreciation (per diem, fuel, insurance, repairs, and everything else)
• Entity structure for owner-operators, how the LLC and S-corp election affects depreciation flow-through, self-employment tax, and QBI
• Form 2290 heavy vehicle use tax, the other major truck-related tax obligation that applies to vehicles 55,000 lbs and over
• Construction equipment depreciation, the parallel Section 179 and bonus depreciation analysis for contractors and heavy equipment
• Leased truck tax deductions, how lease-purchase programs and true leases change the depreciation and deduction picture

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.