The Section 179 deduction can allow eligible businesses to deduct the cost of qualifying property in the year it is placed in service instead of recovering the cost through regular depreciation over several years.
For 2026, the Section 179 deduction limit is $2,560,000, and the phase-out begins when total qualifying Section 179 property placed in service exceeds $4,090,000. These amounts are adjusted for inflation under current law.
Understanding the rules can help business owners determine whether Section 179 is appropriate when purchasing equipment, machinery, computers, software, vehicles, or certain improvements to business property.
What Is the Section 179 Deduction?
Section 179 of the Internal Revenue Code allows qualifying taxpayers to elect to expense the cost of eligible property instead of depreciating the property over its normal recovery period.
For example, instead of purchasing business equipment for $20,000 and depreciating it over several years, an eligible business may be able to deduct some or all of the cost in the year the property is placed in service.
The deduction can reduce taxable business income, subject to the applicable Section 179 limitations.
2026 Section 179 Limits
The major federal limits for 2026 are:
Maximum Section 179 deduction: $2,560,000
Phase-out threshold: $4,090,000
Maximum Section 179 deduction for qualifying SUVs: $32,000
The $2,560,000 deduction limit is reduced dollar-for-dollar by the amount of qualifying Section 179 property placed in service above $4,090,000.
These limits apply to tax years beginning in 2026.
What Property Qualifies for Section 179?
Generally, Section 179 applies to qualifying property acquired for use in an active trade or business. Eligible property can include:
· Machinery and equipment
· Computers and certain technology
· Office furniture and equipment
· Business-use vehicles
· Off-the-shelf computer software
· Certain improvements to nonresidential real property
· Certain agricultural and storage property
The property generally must be purchased or acquired for business use and placed in service during the applicable tax year.
Not every business asset qualifies, so the property's specific characteristics and use should be reviewed before claiming the deduction.
Who Can Claim Section 179?
Section 179 can potentially apply to businesses operating in different legal forms, including:
· Sole proprietorships
· Partnerships
· LLCs
· S corporations
· C corporations
However, the deduction is subject to limitations that can apply at the taxpayer or owner level. The business structure alone does not determine how much can ultimately be deducted.
The Business Income Limitation
One important Section 179 rule is the taxable-income limitation.
Generally, the Section 179 deduction cannot exceed the taxpayer's aggregate taxable income from the active conduct of a trade or business.
This means a business cannot simply use Section 179 to create or increase a tax loss.
If an otherwise allowable Section 179 deduction exceeds the applicable business-income limitation, the unused amount generally can be carried forward to future years.
This is one reason Section 179 should be evaluated together with the business's overall tax position rather than viewed simply as an equipment write-off.
Example: How the Phase-Out Works
Suppose a business places $4.59 million of qualifying Section 179 property in service during 2026.
The phase-out begins at $4.09 million.
The excess is:
$4.59 million − $4.09 million = $500,000
The maximum $2.56 million deduction is therefore reduced by $500,000:
$2.56 million − $500,000 = $2.06 million
Before applying other limitations, the business would have a maximum Section 179 deduction of $2.06 million under this simplified example.
The actual deduction may be lower depending on the business-income limitation, property eligibility, business-use percentage, and other tax rules.
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What About Vehicles?
Vehicles require special attention.
Although some business vehicles can qualify for Section 179, additional limitations may apply. The rules can depend on factors such as the type of vehicle, its weight, and the percentage of business use.
For 2026, the Section 179 amount that may be taken into account for qualifying sport utility vehicles is capped at $32,000.
A vehicle used partly for personal purposes generally requires additional calculations to determine the deductible business portion.
Business Use Matters
Property generally needs to be used predominantly for business to qualify for Section 179. Special rules apply when business use is 50% or less.
For property with both business and personal use, the deductible amount may need to be reduced to reflect the business-use percentage.
Maintaining records showing business use is therefore particularly important for vehicles and other mixed-use property.
How to Claim the Section 179 Deduction
Businesses generally claim the deduction using Form 4562, Depreciation and Amortization.
Keep documentation showing:
· What property was purchased
· Purchase date
· Cost of the property
· Date the property was placed in service
· Business-use percentage when applicable
· Financing or purchase records
· Vehicle mileage and business-use records when applicable
Good documentation helps support the deduction if the IRS later questions the business expense.
Section 179 vs. Bonus Depreciation
Section 179 and bonus depreciation are different tax provisions, although both can accelerate deductions for qualifying business property.
Section 179
2026 maximum deduction: $2.56 million
Phase-out: Begins at $4.09 million of qualifying property
Income limitation: Generally cannot exceed applicable business taxable income
Examples of qualifying property: Equipment, machinery, certain software, vehicles, and certain property improvements
Bonus depreciation
2026 rate: Generally 100% for qualifying property acquired after January 19, 2025
Dollar limitation: No Section 179-style annual dollar cap
Income limitation: Unlike Section 179, bonus depreciation can generally create or increase a tax loss
Examples of qualifying property: Certain depreciable property that meets the applicable bonus-depreciation requirements
The One Big Beautiful Bill Act made 100% additional first-year depreciation permanent for qualifying property acquired after January 19, 2025, subject to the applicable requirements.
This means the decision is no longer simply about choosing between a 2025 40% bonus depreciation rate and Section 179. For qualifying 2026 property, businesses may have substantially more flexibility when evaluating accelerated depreciation options.
Which Deduction Is Better?
There is no single answer for every business.
Section 179 can provide greater control over which qualifying assets receive an immediate deduction and how much is deducted, subject to its limitations. Bonus depreciation may be useful when a business wants to accelerate a larger amount of depreciation and potentially generate a tax loss.
In some situations, a business may use both provisions as part of its overall depreciation strategy.
Because the rules can interact with other deductions, business income, vehicle limitations, and future tax years, the best choice should be based on the company's complete tax situation.
Plan Before Purchasing Major Equipment
Buying equipment solely for a tax deduction does not necessarily make financial sense. A tax deduction reduces taxable income; it does not make the underlying purchase free.
Before making a large equipment or vehicle purchase, consider the business's cash flow, financing costs, expected business use, current taxable income, and available depreciation options.
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