The Tax Math That Changes Whether You Should Own or Lease Your Truck

A Note Before We Start Tax law is not a place for general advice to substitute for specific counsel. The concepts in this article are educational. The numbers used are illustrative.

Your actual tax situation depends on your entity structure, your annual taxable income, your state’s conformity with federal law, and decisions that need to be made in consultation with a qualified CPA or tax professional who knows your books. Read this to understand the concepts.

Then take it to your accountant and have the real conversation with actual numbers. That said, the concepts here are not obscure or complicated. The figures are only illustrative examples for educational purposes.

They are things every owner-operator who owns equipment should understand, because not understanding them is costing real money if they are purchasing outright. What Depreciation Actually Is When you buy a truck, the IRS does not let you deduct the full purchase price as a business expense the way you would deduct a fuel fill-up or a tire repair.

Equipment is an asset with a useful life that extends beyond the year of purchase. The standard IRS approach is to spread the deduction across that useful life, which for a Class 8 tractor is five years under the standard MACRS schedule.

So if you pay $160,000 for a truck and apply straight-line depreciation over five years, you deduct roughly $32,000 per year for five years. Each year’s deduction reduces your taxable income by that amount, which reduces what you owe in federal income tax. That is the baseline.

The actual rules give you two tools that do something very different, and very much more useful for a capital-constrained owner-operator.

Section 179: Deducting the Whole Truck in Year One Section 179 of the Internal Revenue Code allows a business to deduct the full purchase price of qualifying equipment in the year it is placed in service, rather than spreading the deduction over five years. For 2026, the maximum Section 179 deduction is $2,560,000, according to IRS Revenue Procedure 2025-32.

A Class 8 tractor is explicitly qualifying property. There is no SUV cap, no passenger vehicle limitation. A semi-truck bought and placed in service in 2026 is eligible for full Section 179 expensing up to your taxable income for the year. That last phrase matters: Section 179 cannot create a loss.

The deduction is capped at your net taxable income from the business. If you earn $120,000 in taxable income from your trucking operation and you buy a $160,000 truck, you can deduct up to $120,000 under Section 179 in year one, reducing your taxable income to zero. The remaining $40,000 of purchase cost does not disappear.

It carries forward as a Section 179 carryover deduction that can be applied in future tax years. The practical translation: instead of getting a $32,000 deduction spread over five years, you can potentially get a $120,000 deduction in year one, eliminating your entire federal income tax liability for that year.

The cash you would have sent to the IRS stays in your business. Bonus Depreciation: The Other Tool, Now Back at 100 Percent Bonus depreciation is a separate first-year depreciation mechanism that works alongside Section 179 rather than replacing it.

It had been in the process of phasing out under the 2017 Tax Cuts and Jobs Act schedule, dropping to 60 percent in 2024 and heading toward zero by 2027. Then Congress changed the rules.

The One Big Beautiful Bill Act, signed into law on July 4, 2025, permanently restored bonus depreciation to 100 percent for qualifying property acquired and placed in service after January 19, 2025. This was confirmed and clarified by the IRS in Notice 2026-11, issued January 14, 2026.

For a Class 8 tractor purchased and placed in service in 2026, 100 percent bonus depreciation is available, and it is now a permanent feature of the tax code rather than a temporary provision. The key difference between Section 179 and bonus depreciation: bonus depreciation can create a net operating loss (NOL). Section 179 cannot.

If your taxable income is $80,000 and you buy a $160,000 truck, Section 179 can zero out your $80,000 in taxable income. Bonus depreciation on the remaining $80,000 basis can push your tax year into a loss, which can then be carried forward to offset income in future years.

Used equipment qualifies for both Section 179 and bonus depreciation as long as it is new to the taxpayer. A three-year-old Kenworth purchased from a dealer or at auction, one you have never owned before, qualifies. This matters because the used Class 8 market is where most owner-operators buy.

According to ACT Research’s State of the Industry data for early 2026, average retail prices for used Class 8 tractors have been running in the range of $55,000 to $60,000, with December 2025 same-dealer sales averaging $57,135. At those prices, the full-expensing math is accessible to operators who are not buying brand new iron.

The Dollar Difference: Owning Versus Leasing Here is where