Truck depreciation is one of the most powerful tax deductions available to owner-operators. When you buy a commercial truck, the IRS allows you to deduct its cost over time through depreciation. For many truck drivers, depreciation is the single largest deduction they claim each year, potentially reducing taxable income by tens of thousands of dollars. Understanding how truck depreciation works can dramatically lower your tax bill.
The tax code offers several ways to depreciate your truck, including Section 179 expensing, bonus depreciation, and the Modified Accelerated Cost Recovery System (MACRS). Each method has different rules, limits, and benefits. Choosing the right combination of depreciation methods for your situation is a key part of any trucking tax strategy. For an overview of how depreciation fits into your overall deductions, see our Truck Tax Deductions Guide.
Table of Contents
1. What Is Depreciation?
Depreciation is the process of deducting the cost of a business asset over its useful life. When you buy a truck, you cannot deduct the full purchase price in one year as a regular business expense (unless you use Section 179 or bonus depreciation). Instead, the IRS requires you to spread the deduction over the truck's recovery period, which for heavy trucks is generally 5 years under MACRS.
The theory behind depreciation is that business assets lose value over time due to wear and tear, age, and obsolescence. Depreciation allows you to match the expense of the asset with the income it generates. For truck drivers, this means you deduct a portion of your truck's cost each year over the time you use it in your business. The total depreciation you can claim over the life of the truck cannot exceed your adjusted basis in the vehicle (generally the purchase price minus any Section 179 or bonus depreciation already claimed).
2. Section 179 Deduction
Section 179 of the Internal Revenue Code allows you to deduct the full cost of qualifying equipment in the year you place it in service, rather than depreciating it over several years. For 2026, the Section 179 deduction limit is ,160,000, meaning you can expense up to that amount of qualifying property in a single year. The deduction begins to phase out dollar-for-dollar once your total equipment purchases exceed ,890,000 for the year.
To qualify for Section 179, your truck must be used more than 50% for business. The truck must be tangible personal property used in your business, and it must be purchased and placed in service during the tax year. For heavy trucks with a gross vehicle weight rating (GVWR) over 14,000 pounds, the full Section 179 limit applies without the passenger automobile limits that apply to lighter vehicles. This makes Section 179 particularly valuable for owner-operators who purchase heavy trucks.
Key Point: Section 179 is subject to the business income limitation. Your Section 179 deduction cannot exceed your total taxable income from your business. If your business has a net loss for the year, you cannot claim Section 179. However, you can carry forward unused Section 179 amounts to future years.
3. Bonus Depreciation
Bonus depreciation allows you to deduct a percentage of the cost of qualifying property in the first year it is placed in service. For 2026, the bonus depreciation rate is 60% (down from 80% in 2024 and scheduled to phase down to 0% by 2027). Unlike Section 179, bonus depreciation is not subject to a dollar limit or the business income limitation. You can claim bonus depreciation even if it creates a net operating loss.
Bonus depreciation applies to new and used qualifying property acquired and placed in service during the tax year. For trucks, bonus depreciation is available for both new and used vehicles as long as they are new to you (the original use does not have to begin with you for bonus depreciation on used property). This makes it valuable for owner-operators who buy both new and used trucks. Bonus depreciation can be combined with Section 179 to maximize first-year deductions. For example, you could use Section 179 to expense a portion of the cost and then apply bonus depreciation to the remaining basis.
4. MACRS 5-Year Recovery
The Modified Accelerated Cost Recovery System (MACRS) is the standard depreciation method used for most business assets. Heavy trucks (GVWR over 14,000 lbs) are classified as 5-year property under MACRS. This means the cost is depreciated over 5 years using the double-declining balance method, which allows higher deductions in the early years.
The MACRS depreciation schedule for 5-year property is: 20% in year 1, 32% in year 2, 19.2% in year 3, 11.52% in year 4, 11.52% in year 5, and 5.76% in year 6 (the half-year convention applies). These percentages apply to the adjusted basis of the property after any Section 179 or bonus depreciation has been claimed. If you do not claim Section 179 or bonus depreciation, the MACRS percentages apply to the full cost of the truck.
5. Vehicle Weight Requirements
The weight of your truck determines which depreciation rules apply. For trucks with a GVWR of 14,000 pounds or less, the passenger automobile limits under IRC Section 280F may apply, capping the annual depreciation amount. For trucks over 14,000 pounds GVWR, these limits do not apply, allowing for significantly higher first-year deductions.
Most over-the-road semi-trucks have a GVWR well over 14,000 pounds, so owner-operators typically qualify for the full Section 179 limits and are not subject to the luxury auto depreciation caps. This is a major tax advantage of heavy truck ownership. If your truck has a GVWR between 6,000 and 14,000 pounds, the Section 179 limit is capped at ,900 for 2026 (subject to inflation adjustments). For more information on vehicle classification, see the IRS Publication 946 (How to Depreciate Property).
6. Depreciation Limits Table
| Depreciation Method | 2026 Limit | Key Requirements |
|---|---|---|
| Section 179 | ,160,000 (phase-out at ,890,000) | Business use > 50%, income limitation applies |
| Bonus Depreciation | 60% of adjusted basis (phasing down) | Available for new and used qualifying property |
| MACRS (Year 1) | 20% of basis after Section 179/bonus | 5-year recovery, double-declining balance |
| MACRS (Year 2) | 32% of remaining basis | Applies automatically if no Section 179/bonus |
| Passenger Auto Cap (GVWR ≤ 14k lbs) | ,900 Section 179 limit | Additional annual depreciation caps apply |
| Heavy Truck (GVWR > 14k lbs) | No cap on Section 179 | Full limits apply for qualifying vehicles |
Choosing the right depreciation strategy requires careful planning. Many owner-operators use a combination of Section 179 and bonus depreciation to maximize first-year deductions. For example, if you purchase a ,000 truck, you might use Section 179 to deduct ,000 and then apply 60% bonus depreciation to the remaining ,000 basis, resulting in a total first-year deduction of ,000. The remaining ,000 would be depreciated under MACRS over the following years.
Pro Tip: Depreciation recapture applies when you sell a truck for more than its adjusted basis. If you claimed significant depreciation and then sell the truck at a gain, the gain may be taxed as ordinary income rather than capital gains. This is called depreciation recapture. Planning for recapture is an important part of long-term trucking tax planning. See our Truck Depreciation and Section 179 article for advanced recapture strategies.
Frequently Asked Questions
What is depreciation recapture and how does it work?
Depreciation recapture occurs when you sell a depreciated asset for more than its adjusted basis (cost minus depreciation claimed). The gain is taxed as ordinary income up to the amount of depreciation you previously claimed. Any remaining gain is taxed as a capital gain. For example, if you bought a truck for ,000, claimed ,000 in depreciation, and sold it for ,000, the ,000 gain (,000 - ,000 adjusted basis) would be recaptured as ordinary income up to ,000.
Can I claim depreciation on a leased truck?
No, you cannot claim depreciation on a truck you lease because you do not own it. However, lease payments are fully deductible as a business expense. If you have a lease with a purchase option, the tax treatment depends on whether the lease is classified as a true lease or a conditional sales contract under IRS rules. Consult a tax professional to determine the correct treatment of your lease agreement.
What happens if my business use of the truck falls below 50%?
If your business use falls below 50% in any year after you have claimed Section 179, you may have to recapture a portion of the Section 179 deduction. The recapture amount is the difference between the Section 179 claimed and the amount that would have been allowed under MACRS over the period of use. This recapture is reported as ordinary income in the year the business use drops below 50%.
Can I depreciate a trailer separately from my truck?
Yes, a trailer is depreciated separately from the truck tractor. Trailers are also classified as 5-year property under MACRS and qualify for Section 179 and bonus depreciation, provided they meet the business use requirements. Many owner-operators purchase trailers separately from their trucks, and each asset is depreciated independently based on its own cost and placed-in-service date.
How do I report depreciation on my tax return?
Depreciation is reported on IRS Form 4562 (Depreciation and Amortization). You must file Form 4562 with your tax return for any year you claim depreciation, Section 179 expensing, or bonus depreciation. The form calculates your total depreciation deduction, which is then carried to Schedule C (for sole proprietors) or the appropriate business tax form. Form 4562 requires detailed information about each asset, including its cost, placed-in-service date, and business-use percentage.
What is the difference between Section 179 and bonus depreciation?
Section 179 is limited to your taxable business income (cannot create a net loss), has a dollar cap ($1,160,000 for 2026), and begins to phase out at $2,890,000 in total equipment purchases. Bonus depreciation has no dollar limit, no income limitation (can create a net operating loss), and applies at a set percentage (20% for 2026). You can use both methods together, applying Section 179 first and then bonus depreciation on the remaining basis. Bonus depreciation is scheduled to phase down to 0% by 2027 unless Congress extends it.
10. Depreciation Methods Comparison
| Method | 2026 Limit | Creates Net Loss? | Best For |
|---|---|---|---|
| Section 179 | $1,160,000 (phase-out $2,890,000) | No — limited to taxable income | Small to mid-size purchases |
| Bonus Depreciation (20%) | No dollar cap | Yes — can create NOL | Large equipment purchases |
| MACRS (200% DB) | Depreciated over asset life | Partial — annual deduction | Ongoing depreciation |
| Straight Line | Equal annual amounts | Limited | Low business-use assets |
Real dollar example: What is the tax impact of purchasing a $150,000 truck in 2026?
An owner-operator in the 24% bracket who buys a $150,000 truck and uses Section 179 for the full amount saves $36,000 in federal income tax plus approximately $22,950 in self-employment tax (15.3% of $150,000), for a total first-year tax savings of $58,950. This brings the net after-tax cost to $91,050 — a significant incentive for investing in equipment.
What happens to unused Section 179 if my taxable income is too low?
Unused Section 179 deductions carry forward indefinitely to future tax years. For example, if you buy a $150,000 truck but only have $100,000 in taxable business income, you can deduct $100,000 this year and carry the remaining $50,000 forward to deduct against future income. This makes Section 179 extremely flexible for years when income fluctuates.
Can I claim depreciation on a truck I already own from prior years?
If you converted a personal truck to business use, you can begin depreciating it based on its fair market value at the time of conversion. If you forgot to claim depreciation in prior years, you can file Form 3115 (Change in Accounting Method) to claim missed depreciation or amend prior returns within the statute of limitations (typically 3 years).