What Does Section 179 Mean: Limits, Vehicles, and Recapture

Section 179 of the Internal Revenue Code lets a business deduct the full purchase price of qualifying equipment, software, and certain property improvements in the year the items are bought and put to use, instead of spreading the cost over five to seven years through standard depreciation. For tax years beginning in 2026, a business can expense up to $2,560,000 in qualifying purchases.¹ The deduction applies whether you paid cash or financed the purchase, and it covers both new and used equipment. That combination is what makes it one of the more useful tax tools available to small and mid-sized operations.

What Property Qualifies

The basic rule is simple: tangible personal property bought for use in your business qualifies. Machinery, manufacturing equipment, office furniture, computers, and similar items all fit. Off-the-shelf computer software also qualifies if it’s commercially available to the general public under a non-exclusive license and used for income-producing work.²

Since 2018, certain improvements to nonresidential buildings also qualify. Roofs, HVAC systems, fire protection and alarm systems, and security systems added to a commercial building you already own are eligible for Section 179 treatment.³ Structural components like walls, floors, and the building frame itself do not qualify. Equipment bolted to a building but not part of its structure, such as a printing press or industrial tool, does.

A few acquisition rules matter. You have to buy the property from an unrelated party. Inherited equipment or gifts don’t count. If you trade in old equipment for new, only the cash portion of the deal is eligible.⁴

Dollar Limits and Phase-Out

The IRS adjusts Section 179 limits for inflation each year. For tax years beginning in 2026:¹

Maximum deduction: $2,560,000 across all qualifying purchases in a single year.
Phase-out threshold: $4,090,000. Once the total cost of qualifying property placed in service crosses this line, the maximum deduction shrinks dollar-for-dollar.
Full phase-out: $6,650,000. At this spending level the deduction disappears entirely.

An example makes the phase-out concrete. If your business places $4,590,000 of qualifying equipment in service during 2026, that exceeds the $4,090,000 threshold by $500,000, so the maximum deduction drops from $2,560,000 to $2,060,000. The math is simple subtraction, and it applies regardless of how many individual assets make up the total.

There’s also an income limit. Your Section 179 deduction for the year cannot exceed the total taxable income from your active business operations. If your business nets $200,000 in taxable income and you bought $500,000 in equipment, you can only deduct $200,000 this year. The remaining $300,000 carries forward to future years when there’s enough income to absorb it.²

Vehicle Rules

Vehicles are where Section 179 gets complicated. The rules split them into two categories based on gross vehicle weight rating (GVWR), and the tax treatment differs sharply.

Heavy Vehicles Over 6,000 Pounds

SUVs, trucks, and vans with a GVWR above 6,000 pounds but no more than 14,000 pounds are eligible, but a separate cap applies. For 2026, the maximum you can expense on a qualifying SUV is $32,000.¹ The remaining cost gets depreciated over the normal recovery period. Certain vehicles escape the SUV cap entirely, including pickups with a long cargo bed separated from the passenger area, vehicles that seat more than nine people behind the driver, and enclosed cargo vans without rear seating.² Those can use the full $2,560,000 limit.

Passenger Vehicles Under 6,000 Pounds

Lighter passenger vehicles fall under the separate depreciation limits in Section 280F, which are far more restrictive. For a passenger automobile placed in service in 2026 where 100% bonus depreciation applies, the first-year cap is $20,300. Without bonus depreciation, the first-year limit drops to $12,300.⁵ These caps include any Section 179 amount, so the total first-year write-off for a lighter car cannot exceed those figures regardless of what the vehicle cost.

Business Use and Timing

Two conditions apply to every Section 179 deduction. First, you have to use the property in your business more than 50% of the time. If you buy a $30,000 piece of equipment and use it 60% for business and 40% for personal purposes, only the business portion of the cost is eligible. Drop below 50% business use in any year during the asset’s recovery period, and the IRS will recapture part of the deduction as income.²

Second, the equipment must be placed in service by December 31 of the tax year you claim it. Placed in service means set up, functional, and ready for its intended use. A machine bought in November that sits in a crate through the new year doesn’t qualify for the current year. Missing the deadline by a day pushes the entire deduction into the next year.

Section 179 vs. Bonus Depreciation

Section 179 and bonus depreciation both let you write off equipment costs faster than standard depreciation, and they interact in a specific order. Section 179 applies first, then bonus depreciation to any remaining cost, and finally regular MACRS depreciation to whatever is left.⁶

The One, Big, Beautiful Bill Act restored 100% bonus depreciation for qualifying property acquired after January 19, 2025, so the full cost of most eligible assets can be deducted in the first year through bonus depreciation alone.⁷ With both provisions now offering full first-year expensing, the practical differences still matter:

Section 179 cannot create or increase a net operating loss. Bonus depreciation can. In an expected loss year, bonus depreciation may produce a larger benefit.
Section 179 phases out above $4,090,000 in equipment placed in service. Bonus depreciation has no spending ceiling.
Section 179 lets you pick exactly how much to expense on each asset, down to the dollar. Bonus depreciation is generally all-or-nothing per class of property, though taxpayers can elect out.
Many states conform to Section 179 at some level but treat bonus depreciation differently, so choosing Section 179 can sometimes simplify state filings.

For most small businesses buying well under the phase-out threshold, the two produce the same federal result. The choice starts to matter near the spending cap, in loss years, or in states with nonconforming rules.

Recapture: When You Owe Back the Deduction

A large upfront deduction comes with strings attached. If the asset’s business use drops to 50% or less during its recovery period, the IRS requires part of the tax benefit back. The recapture amount equals the Section 179 deduction you originally claimed minus the depreciation you would have been allowed under the alternative depreciation system from the year the property was placed in service through the recapture year. That difference is reported as ordinary income on Form 4797.⁸

Selling the asset triggers a similar calculation. The Section 179 deduction reduces your cost basis in the property to zero or close to it, so most or all of the sale price becomes taxable gain. That gain is taxed as ordinary income under the Section 1245 recapture rules, not at the lower capital gains rate. This catches some owners off guard when they sell equipment they expensed years earlier and face a larger tax bill than expected.

How to Claim It

You claim Section 179 on IRS Form 4562, Depreciation and Amortization. Part I of the form is dedicated to Section 179 and asks for a description of each property, its cost, and the amount you elect to expense.⁶ The completed form attaches to your business’s annual return: Schedule C for sole proprietors, Form 1120 for C corporations, or Form 1120-S for S corporations.⁹

Partnerships and S corporations don’t take the deduction at the entity level. The Section 179 expense passes through to individual partners or shareholders on Schedule K-1, and each owner claims their share on their personal return, still subject to their own business income limitation.⁶

The election has to be made on the Form 4562 filed with either your original return for the year the property was placed in service or an amended return filed within the applicable time limit. Missing the election window means missing the deduction for that year. Any excess over your business income for the year carries forward and appears on Form 4562 the following year.⁹

State Rules Don’t Always Match

Not every state follows the federal Section 179 rules. Several cap the deduction well below the federal limit. California, New Jersey, Hawaii, and Indiana are among those that haven’t adopted the expanded federal limits and instead impose their own ceilings, some as low as $25,000. Connecticut allows only a portion of the federal deduction and requires the disallowed amount to be spread over several years. A few states impose no income tax at all, making the question irrelevant. Before assuming your state return will mirror your federal deduction, check your state’s conformity rules or ask your tax preparer to verify the applicable limits. A large Section 179 deduction on your federal return paired with a much smaller one on your state return is common and catches first-time filers off guard.

1
Internal Revenue Service. Rev. Proc. 2025-32
2
Office of the Law Revision Counsel. 26 USC 179 – Election to Expense Certain Depreciable Business Assets
3
Internal Revenue Service. Depreciation Expense Helps Business Owners Keep More Money
4
Internal Revenue Service. Publication 946 – How to Depreciate Property (2025)
5
Internal Revenue Service. Rev. Proc. 2026-15
6
Internal Revenue Service. Instructions for Form 4562 (2025)
7
Internal Revenue Service. One, Big, Beautiful Bill Provisions
8
Internal Revenue Service. Instructions for Form 4797 (2025)
9
Internal Revenue Service. Form 4562, Depreciation and Amortization (2025)