Section 179 Deductions

Tax Planning for Business Owners

Section 179 of the Internal Revenue Code lets businesses immediately expense the full cost of qualifying equipment, software, and certain property in the year it is placed in service, rather than depreciating it over multiple years. For business owners acquiring meaningful amounts of equipment, the deduction can substantially reduce taxable income in the year of acquisition.

The Section 179 limits changed dramatically in 2025. Under the One Big Beautiful Bill Act (OBBBA), the maximum deduction more than doubled from $1,250,000 to $2,500,000, and the phase-out threshold rose from $3,130,000 to $4,000,000. Both amounts now adjust annually for inflation. For 2026, the inflation-adjusted limits are $2,560,000 for the maximum deduction and $4,090,000 for the phase-out threshold.

This page covers how Section 179 actually works, what qualifies, how it compares to bonus depreciation, and the strategic considerations that determine when to use one, the other, or both.

What Section 179 is and How it Works

Section 179 is an immediate expensing election under IRC Section 179. When a business places qualifying property in service, it can elect to deduct the full cost in year one rather than depreciating the property over its standard recovery period.

The election applies on a property-by-property basis. A business that purchases $1,500,000 of qualifying equipment can elect Section 179 treatment on all of it, some of it, or none of it. Property not expensed under Section 179 reverts to standard MACRS depreciation (with bonus depreciation potentially available).

A Simple Example

A business acquires $800,000 of qualifying equipment in 2026. Under Section 179, the business elects to expense the full $800,000 in year one. For a taxpayer in the 37 percent federal bracket plus 5 percent state, this produces approximately $336,000 in immediate tax savings. The same equipment under standard MACRS depreciation might produce only $160,000 in first-year deductions.

The Critical Income Limitation

Unlike bonus depreciation, Section 179 cannot exceed your taxable business income for the year. If your business has $500,000 in taxable income and you try to expense $800,000 under Section 179, you can only claim $500,000 in the current year. The remaining $300,000 carries forward to future years.

This income limitation is the single most important difference between Section 179 and bonus depreciation. Section 179 can reduce your taxable business income to zero but cannot create a Net Operating Loss. Bonus depreciation has no such limit and can create or increase an NOL.

The 2026 Section 179 Limits

Under current law, the Section 179 limits for tax years beginning in 2026 are:

Maximum Deduction: $2,560,000

This is the most you can expense under Section 179 in a single tax year. The cap applies to your total Section 179 elections across all qualifying property.

Phase-Out Threshold: $4,090,000

If your total qualifying property purchases for the year exceed $4,090,000, the maximum Section 179 deduction is reduced dollar-for-dollar by the amount of the excess. A business with $4,500,000 in qualifying purchases would have its Section 179 cap reduced by $410,000 (to $2,150,000).

Complete Phase-Out: $6,650,000

When total qualifying purchases reach $6,650,000, the Section 179 deduction phases out entirely. Above this threshold, businesses rely on standard MACRS depreciation and bonus depreciation rather than Section 179. This is why larger businesses making substantial capital investments often emphasize bonus depreciation (which has no dollar cap) rather than Section 179.

SUV Cap: $32,000

Section 179 deductions on certain SUVs (those with gross vehicle weight ratings between 6,001 and 14,000 pounds) are capped at $32,000 in 2026, regardless of the vehicle’s purchase price. This was put in place to prevent the original Section 179 “Hummer loophole” that let business owners write off luxury SUVs at full cost.

Inflation Adjustments

Beginning with tax years after 2025, both the maximum deduction and the phase-out threshold adjust annually for inflation. The amounts above reflect the 2026 inflation adjustments. The IRS will publish updated figures each year.

What Qualifies for Section 179

Section 179 covers a broader range of property than many business owners realize. Eligible property generally includes:

Tangible Personal Property

Machinery and equipment used in your business
Computers, software, and peripheral equipment
Office furniture and fixtures
Vehicles (subject to specific vehicle limits)
Single-purpose agricultural or horticultural structures

Qualified Real Property

Under current law, Section 179 also covers certain real property improvements:

Qualified improvement property (QIP): Interior improvements to nonresidential buildings (not including elevators, escalators, internal structural framework, or building enlargements)
Roofs on nonresidential buildings
Heating, ventilation, and air conditioning (HVAC) systems in nonresidential buildings
Fire protection and alarm systems in nonresidential buildings
Security systems in nonresidential buildings

This is a significant expansion from the original Section 179 rules, which excluded most real property improvements. For business owners who own the building they operate from, this opens up substantial planning opportunities.

What Does NOT Qualify

Section 179 does not cover:

The building structure itself (residential or commercial)
Land (which is never depreciable)
Property held primarily for investment (rather than active business use)
Property used predominantly outside the United States
Property used by tax-exempt entities or governments (with some exceptions)
Property received as a gift, inheritance, or from a related party

Business Use Requirement

Property must be used more than 50 percent for business to qualify for Section 179. If business use is between 50 and 100 percent, the deduction is limited to the business-use percentage of the cost. If business use drops below 50 percent in a subsequent year, previously taken Section 179 deductions may need to be recaptured.

Section 179 vs Bonus Depreciation

Section 179 and bonus depreciation are often confused because they both allow accelerated first-year deductions. They are different tools with different rules, and most businesses use them in combination.

The Key Differences

Election required

Yes, taxpayer must elect

Automatic unless opted out

Income limitation

Cannot create or increase a loss

Can create or increase a loss

Dollar limit

Capped at $2,560,000 in 2026

No dollar cap

Phase-out

Begins at $4,090,000 in purchases

No phase-out

Flexibility

Choose per asset

Applies to all qualifying assets in class

Quick Takeaway

A simple way to decide between the two:

Choose Section 179 when you want asset-by-asset control and your taxable income comfortably covers the deduction.
Choose Bonus Depreciation when you want to deduct everything automatically, or when you need the deduction to create or increase a loss.
Use both together when total purchases exceed the Section 179 cap or the income limitation. Apply Section 179 first to the assets where it produces the best outcome, then let Bonus Depreciation handle the rest.

The Required Ordering

IRS rules generally require businesses to apply Section 179 first, then bonus depreciation on whatever remains. This ordering matters because:

Section 179 lets you pick and choose specific assets to expense, giving you control over which deductions you take
Bonus depreciation applies automatically to entire classes of property unless you elect out
The income limitation on Section 179 means you may want to take Section 179 on the property where the deduction is most certain to be useful, and apply bonus depreciation to the rest

When to Use Which

Use Section 179 when:

You have specific assets you want to fully expense and the rest of your investment is in non-qualifying property
Your business income comfortably exceeds your acquisition cost
You want to expense qualified real property improvements (which bonus depreciation does not cover in the same way)
You operate in a state that conforms to Section 179 but not to bonus depreciation
You want flexibility to take less than the full deduction by spreading it across assets

Use bonus depreciation when:

Your total acquisitions exceed the Section 179 cap of $2,560,000
You want to create or increase a Net Operating Loss
Your business income is low or you have other losses
You are acquiring large amounts of qualifying property and want the largest possible deduction

Use both when:

Your total acquisitions are large enough that you need both tools
You want to maximize the year-one deduction while preserving flexibility for future years
You have a mix of property types where Section 179 covers some categories better and bonus depreciation covers others better

Strategic Considerations for Section 179

A few less-obvious considerations affect when and how to use Section 179 effectively:

Use It in Profitable Years

Section 179 is limited to taxable business income. In a low-income or loss year, Section 179 produces no immediate benefit (the carryforward goes to future years). In a high-income year, Section 179 produces immediate cash savings at your marginal rate.

For businesses with variable income, timing equipment acquisitions to coincide with high-profit years maximizes the value of the deduction. This is particularly important for businesses with cyclical revenue or one-time income events.

Section 179 and State Tax Conformity

Most states conform to federal Section 179 rules, though some states have their own (usually lower) limits. California, for example, caps Section 179 at $25,000 for state purposes, dramatically lower than the federal cap. Multi-state businesses need to model the state tax impact separately from the federal impact.

This is one of the areas where Section 179 has an advantage over bonus depreciation. More states conform to Section 179 than to bonus depreciation, so the after-tax benefit of Section 179 may be larger when state taxes are factored in, even when the federal benefit looks similar.

The Property-by-Property Election

Unlike bonus depreciation (which applies to entire classes of property unless you elect out), Section 179 is elected on a property-by-property basis. This gives you control to:

Expense specific high-value items while letting other items use standard depreciation
Spread expensing across multiple tax years for income smoothing
Combine with bonus depreciation strategically (Section 179 on items where state conformity matters, bonus depreciation on items where it does not)

Recapture Considerations

Property expensed under Section 179 is subject to Section 1245 recapture at sale, taxed at ordinary income rates (up to 37 percent federally). This is the same as the recapture treatment for property depreciated under accelerated MACRS schedules or bonus depreciation.

The recapture exposure should be considered when planning a sale or disposition of the property. For property held long-term or exchanged through a 1031 exchange, the recapture issue can be deferred indefinitely. For property sold in the near term, the recapture math needs to be modeled. See our page on depreciation recapture strategies for more.

The Vehicle Sub-Caps

Vehicles are one of the most complicated areas of Section 179. The general rules:

Passenger cars and light trucks/vans (6,000 pounds GVWR or less) are subject to luxury auto limits under Section 280F, capping the first-year deduction at approximately $20,400 in 2026 even with Section 179 and bonus depreciation combined
SUVs (6,001 to 14,000 pounds GVWR) are capped at $32,000 for Section 179 specifically, but the remaining basis can be recovered through bonus depreciation
Heavy trucks and vans (over 14,000 pounds GVWR) are not subject to the SUV cap and can be expensed up to the general Section 179 limit

For business owners considering a vehicle purchase, the gross vehicle weight rating significantly affects the available tax treatment.

Common Scenarios for Section 179

“I am buying equipment for my business and want maximum first-year deductions.”

For purchases up to $2,560,000, Section 179 is usually the right starting point. It is straightforward to elect, well understood by CPAs, and produces the deduction you expect. Above $2,560,000, the phase-out begins and bonus depreciation takes over the heavy lifting.

“I am renovating commercial real estate I own.”

Section 179 covers qualified improvement property, roofs, HVAC, fire protection, and security systems in nonresidential buildings. For business owners renovating their own commercial space, this can be a significant deduction. The structural portion of the building still does not qualify, but the improvements often do.

“I want to buy a heavy SUV for my business.”

The $32,000 SUV cap on Section 179 looks limiting, but the remaining basis can typically be recovered through 100 percent bonus depreciation. For a $70,000 qualifying SUV used 100 percent for business, the combined Section 179 and bonus depreciation can recover the full purchase price in year one. Documentation of business use is critical.

“My business had a great year and I want to reduce my tax bill.”

Acquiring qualifying equipment before year-end and electing Section 179 can substantially reduce your taxable income. The equipment must be placed in service (not just purchased) before December 31. Section 179 works particularly well for businesses with strong income that want to convert taxable profits into useful business assets.

“I have variable income and an NOL carryforward.”

Section 179 may not be the best choice in a year when you have an existing NOL or low taxable income. Bonus depreciation may produce better results because it can stack on top of existing losses and create a larger carryforward. The right answer depends on your specific situation and is worth modeling with your CPA.

“My business operates in California.”

California caps Section 179 at $25,000 for state purposes, dramatically lower than the federal cap. For California businesses, the federal Section 179 deduction provides federal tax savings, but the state benefit is limited. Multi-state businesses need to model both the federal and state impact, particularly when comparing Section 179 to bonus depreciation (which California also generally does not conform to).

Mistakes to Avoid

A few common mistakes can reduce or eliminate the benefit of Section 179:

Buying property too late in the year. Property must be placed in service (delivered, installed, and ready for use) by December 31 to qualify for the current year’s deduction. Property purchased in December but not delivered until January falls into the next year.
Forgetting the business income limitation. Section 179 cannot exceed your taxable business income. Planning to expense $500,000 in equipment is worthless if your business only has $100,000 in income that year.
Ignoring the phase-out threshold. Once total qualifying purchases exceed $4,090,000, Section 179 begins to phase out. Businesses planning large capital investments need to model the impact and may benefit from spreading purchases across multiple tax years.
Buying vehicles without understanding the sub-caps. The interaction between Section 179, luxury auto limits, and SUV caps is complicated. A vehicle purchase made without understanding the rules can produce dramatically different tax outcomes than expected.
Failing to consider state tax conformity. Most states conform to Section 179 but some do not, or have lower limits. Multi-state businesses need to plan for both federal and state impacts.
Trying to use Section 179 on rental real estate. Property held primarily for rental (rather than active business use) generally does not qualify for Section 179. Real estate investors should focus on bonus depreciation and cost segregation rather than Section 179.

Frequently Asked Questions

What is the maximum Section 179 deduction in 2026?

The maximum Section 179 deduction for tax years beginning in 2026 is $2,560,000, with a phase-out beginning at $4,090,000 in total qualifying purchases. Above $6,650,000 in qualifying purchases, the Section 179 deduction phases out entirely. These amounts adjust annually for inflation.

Can I use Section 179 on a vehicle?

Yes, but vehicles have specific sub-caps. SUVs between 6,001 and 14,000 pounds GVWR are capped at $32,000 for Section 179 purposes. Passenger cars and light trucks are subject to luxury auto limits under Section 280F. Heavy vehicles over 14,000 pounds GVWR are not subject to the SUV cap. The remaining basis on capped vehicles can often be recovered through bonus depreciation.

Can Section 179 create a Net Operating Loss?

No. Section 179 cannot exceed your taxable business income for the year. Any disallowed amount carries forward to future tax years. This is one of the key differences between Section 179 and bonus depreciation, which has no income limitation and can create or increase an NOL.

Does Section 179 apply to real estate?

Section 179 covers certain real property improvements (qualified improvement property, roofs, HVAC, fire protection, and security systems in nonresidential buildings) but does not cover the building structure itself or residential rental property. Real estate investors typically rely on bonus depreciation and cost segregation rather than Section 179.

How do I claim Section 179?

Section 179 is claimed on IRS Form 4562 (Depreciation and Amortization) when filing your business tax return. The election is made on a timely-filed return, including extensions. Late elections are generally not permitted, which means the decision needs to be made when the return is filed (or before).

Should I use Section 179 or bonus depreciation?

Both, in most cases. The IRS generally requires Section 179 to be applied first (up to its limit), with bonus depreciation applied to the remainder. The optimal split depends on your specific situation, including your taxable income, NOL position, state tax conformity, and the types of property you are acquiring. See our page on bonus depreciation strategies for more on the comparison.

What happens if I sell the property a few years later?

Property expensed under Section 179 is subject to Section 1245 recapture at sale, taxed at ordinary income rates. The recapture amount is the lesser of the gain on the sale or the total Section 179 deductions previously taken. For property held long-term or exchanged through a 1031 exchange, this recapture can be deferred. For property sold in the near term, the recapture should be modeled into the planning.

Put Section 179 to Work for Your Business

Section 179 is one of the most useful tools available to business owners making capital investments. The expanded limits under OBBBA put substantially more deduction capacity within reach, particularly for small and mid-size businesses that were previously constrained by the lower caps.

If you are planning equipment purchases, software acquisitions, vehicle additions, or commercial property improvements:

Contact our team to discuss how Section 179 fits into your broader tax plan
Review our page on bonus depreciation strategies for the related accelerated deduction tool
See business deduction strategies for additional tax planning opportunities for business owners
Read depreciation recapture strategies for what happens when you eventually sell

The right Section 179 strategy depends on your business income, your acquisition plans, your state tax situation, and your broader tax planning. The decisions made in the year of acquisition shape both the current year’s tax bill and the planning options available in future years.