Section 179 Deduction 2026: 5 Smart Write-Off Strategies

The Section 179 deduction is one of the most powerful tools a US small-business owner has for turning equipment, software, and vehicle purchases into immediate tax savings. Instead of spreading the cost of a new machine or a fleet truck over five or seven years, you can often write off the full price in the year you start using it.

But 2026 is not a simple “just take Section 179” year. The One Big Beautiful Bill Act (OBBBA), signed July 4, 2025, raised the Section 179 limit to $2,560,000 for 2026 and made 100% bonus depreciation permanent for property acquired after January 19, 2025. Add the de minimis safe harbor for smaller purchases, and you now have three overlapping ways to expense the same asset.

This guide explains how each option works, which one to use first, how the vehicle rules and business income limitation trip people up, what happens with state taxes and recapture, and how to report everything on Form 4562. Worked dollar examples are included throughout.

Table of Contents

• What Is the Section 179 Deduction?
• Section 179 Deduction Limits for 2026
• What Property Qualifies
• Section 179 vs Bonus Depreciation vs De Minimis Safe Harbor
• Vehicles: The 6,000 lb GVWR Rule and SUV Limit
• Business Income Limitation and Placed-in-Service Rule
• State Conformity and Recapture
• How to Claim the Section 179 Deduction on Form 4562
• Worked Examples
• Common Mistakes to Avoid
• FAQ
• Conclusion

What Is the Section 179 Deduction?

Normally, when a business buys a long-lived asset, it cannot deduct the full cost right away. The cost is recovered over the asset’s useful life through depreciation, typically using MACRS schedules or, for book purposes, methods like straight line depreciation.

The Section 179 deduction is an election under the Internal Revenue Code that lets you treat all or part of the cost of qualifying property as a current-year expense. You choose which assets to expense and how much of each. That flexibility is the key difference between Section 179 and bonus depreciation, which applies automatically to entire classes of property unless you opt out.

Who can use it?

Sole proprietors, LLCs, partnerships, S corporations, and C corporations can all claim it. If you are unsure how your entity is taxed, our explainer on what LLC means walks through the options. For pass-throughs, the election is made by the entity, and the dollar and income limits apply at both the entity and owner level.

Why it matters in 2026

With 100% bonus depreciation back permanently, some owners wonder whether the Section 179 deduction is still relevant. It is, for three reasons: it is elective asset by asset, it covers certain real property improvements that bonus depreciation may not, and it is often the better-supported option on state returns that decouple from bonus depreciation.

Section 179 Deduction Limits for 2026

OBBBA significantly raised the Section 179 deduction ceiling. For tax years beginning in 2026, these are the figures that apply. You can review the law’s business provisions on the IRS One Big Beautiful Bill provisions page.

Item	2026 Figure	What It Means
Section 179 deduction limit	$2,560,000	Maximum you can elect to expense in 2026
Phase-out threshold	$4,090,000	Limit drops $1 for every $1 of qualifying property placed in service above this amount
Full phase-out point	$6,650,000	No Section 179 deduction available once purchases reach this level ($4,090,000 + $2,560,000)
Heavy SUV limit	$32,000	Maximum Section 179 expensing for SUVs over 6,000 lb GVWR
Bonus depreciation	100%	Permanent for qualified property acquired after January 19, 2025
De minimis safe harbor (no AFS)	$2,500	Per item or per invoice; expensed rather than capitalized
Corporate tax rate	21%	Flat rate used to estimate C corporation savings

How the phase-out works

The phase-out keeps Section 179 focused on small and midsize businesses. If you place $4,300,000 of qualifying property in service in 2026, you are $210,000 over the threshold. Your maximum Section 179 deduction becomes $2,560,000 minus $210,000, or $2,350,000.

Most small businesses never reach $4,090,000 of equipment in a year; the business income limitation is far more likely to cap your deduction.

What Property Qualifies for the Section 179 Deduction

Qualifying property must be depreciable, acquired by purchase for use in the active conduct of your trade or business, and used more than 50% for business in the year it is placed in service. Both new and used property qualify, as long as the used property is new to you.

Tangible personal property

• Machinery and manufacturing equipment
• Computers, servers, printers, and networking gear
• Office furniture and fixtures
• Business vehicles, subject to the special limits below
• Tools, medical and dental equipment, and lab instruments
• Restaurant equipment, shelving, and store displays

Off-the-shelf software

Software readily available to the public, not substantially modified, and licensed on a nonexclusive basis can qualify. Custom-developed software generally does not.

Qualified real property

This is where Section 179 really stands apart. You can elect to expense certain improvements to nonresidential real property, including:

• Qualified improvement property (interior improvements to an existing nonresidential building, excluding enlargements, elevators, escalators, and internal structural framework)
• Roofs
• Heating, ventilation, and air-conditioning (HVAC) property
• Fire protection and alarm systems
• Security systems

Roofs and HVAC on commercial buildings generally do not qualify for bonus depreciation because they are treated as part of the building structure. That makes Section 179 the go-to strategy for a landlord or business owner replacing a commercial roof.

What does not qualify

• Land and land improvements such as parking lots (though bonus depreciation may apply to some land improvements)
• Buildings and structural components not listed above
• Residential rental property and property used to furnish lodging, with limited exceptions
• Property acquired from a related party, or by gift or inheritance
• Property used 50% or less for business
• Intangibles such as goodwill

Section 179 vs Bonus Depreciation vs De Minimis Safe Harbor

All three tools can produce a first-year write-off, but they work differently.

Feature	Section 179 Deduction	Bonus Depreciation	De Minimis Safe Harbor
2026 amount	Up to $2,560,000	100% of cost, no dollar cap	Up to $2,500 per item or invoice (no AFS)
How it applies	Elective, asset by asset	Automatic by class unless you elect out	Annual election statement with the return
Can it create a loss?	No; limited to business income	Yes	Yes
Phase-out	Begins at $4,090,000	None	None
Commercial roofs, HVAC, security	Yes	Generally no	Only if within the per-item/invoice limit
Heavy SUVs	Capped at $32,000	No SUV cap	Rarely applies
Reported on Form 4562	Part I	Part II	No; deducted as an expense
State conformity	Often partial	Many states decouple	Usually follows federal

Bonus depreciation in 2026

OBBBA made 100% bonus depreciation permanent for qualified property acquired after January 19, 2025. Qualified property generally includes MACRS property with a shorter recovery period, qualified improvement property, and certain software. Property acquired under a binding contract signed on or before January 19, 2025 remains under the older, reduced phase-down percentages, so check your contract dates.

Bonus depreciation is taken after the Section 179 deduction. If you elect Section 179 on part of an asset, bonus depreciation applies automatically to the remaining basis. If you want to preserve depreciation for future years, you must affirmatively elect out of bonus for that entire property class.

The de minimis safe harbor

The de minimis safe harbor election comes from the tangible property regulations, not from the depreciation rules. A business without an applicable financial statement, such as an audited financial statement, can expense items costing up to $2,500 per item or per invoice. The items are deducted as supplies or ordinary expenses instead of being capitalized at all.

To use it, you need an accounting procedure in place at the start of the year to expense items under that threshold, and you must attach an election statement to a timely filed return (including extensions) each year. Businesses with an AFS can use a higher threshold; ask your advisor whether that applies to you.

Which to use first?

A practical ordering for most small businesses looks like this:

1. De minimis safe harbor for small items like laptops, phones, chairs, and tools at or under $2,500 each. It is simple and never touches Form 4562.
2. Section 179 deduction for assets bonus depreciation cannot reach (commercial roofs, HVAC, security systems), for states that follow Section 179 but not bonus, and when you want precise control asset by asset.
3. Bonus depreciation for everything else, especially when you want to create a loss or you are near the Section 179 phase-out.
4. Regular MACRS depreciation when spreading deductions into higher-income future years makes more sense.

Vehicles: The 6,000 lb GVWR Rule and SUV Limit

Vehicles are the most misunderstood part of Section 179. The rules depend on the vehicle’s gross vehicle weight rating (GVWR), which is printed on a label inside the driver’s door jamb. GVWR is the maximum loaded weight, not the curb weight.

Passenger vehicles under 6,000 lb GVWR

Cars, small SUVs, and light trucks rated at 6,000 lb GVWR or less are subject to the “luxury auto” depreciation caps under Section 280F. These annual caps limit the combined Section 179 deduction, bonus depreciation, and regular depreciation you can take each year, no matter what the vehicle cost. The IRS adjusts the caps for inflation, so confirm the current-year figures in IRS Publication 946 before planning a purchase.

Heavy SUVs over 6,000 lb GVWR

SUVs rated above 6,000 lb GVWR escape the luxury auto caps. However, the Section 179 deduction on these heavy SUVs is limited to $32,000 for 2026. Any remaining business-use cost can then be recovered with 100% bonus depreciation, if the SUV was acquired after January 19, 2025.

In practice, that means a heavy SUV used 100% for business can often be written off in full in the first year federally. The $32,000 cap mainly matters when you elect out of bonus depreciation or when your state does not follow bonus depreciation.

Trucks and vans that avoid the SUV cap

Certain vehicles are not treated as SUVs for the $32,000 limit, so the full Section 179 deduction may be available. These generally include:

• Pickup trucks with a full-size cargo bed that is not easily accessible from the passenger compartment
• Cargo vans with no seating behind the driver’s row and no body section protruding more than a short distance in front of the windshield
• Vehicles designed to carry large numbers of passengers, such as shuttle vans
• Specialized work vehicles like dump trucks, box trucks, and tow trucks

Business-use percentage

You must use the vehicle more than 50% for business to expense it under Section 179, and you can only deduct the business-use portion. Commuting does not count as business use. Keep a contemporaneous mileage log; the IRS scrutinizes vehicle deductions closely.

If you prefer simplicity, remember that the standard mileage rate for 2026 is 72.5 cents per mile from January 1 through June 30 and 76 cents per mile from July 1 through December 31. But once you claim Section 179 or bonus depreciation on a vehicle, you cannot switch that vehicle to the standard mileage rate later.

Business Income Limitation and Placed-in-Service Rule

Two rules decide whether your write-off actually lands in 2026: how much active business income you have, and when the asset starts working for you.

The business income limitation

Your Section 179 deduction cannot exceed your taxable income from the active conduct of any trade or business during the year. For individuals, that total includes net income from all your active businesses plus W-2 wages from a job. Passive rental income generally does not count.

Section 179 cannot create or increase a loss. Any amount you elected but could not use because of this limit carries forward indefinitely to future years, where it is again subject to the income limit. Bonus depreciation has no such limit and can generate a net operating loss, although the permanent excess business loss limitation under Section 461(l) may cap how much of a large loss an individual can use in one year.

The placed-in-service rule

You can only claim a Section 179 deduction for the year an asset is placed in service, meaning it is ready and available for its specific use in your business. Buying, paying for, or ordering equipment is not enough.

• A delivery truck ordered in November but delivered January 8, 2027 is a 2027 asset.
• A CNC machine delivered December 20, 2026 but not installed and operational until January counts for 2027 in most cases.
• Financed equipment qualifies in full when placed in service, even if you have paid only a small down payment.

For 2026 deductions, the asset must be placed in service by December 31, 2026.

State Conformity and Recapture

State conformity

Your federal write-off does not automatically carry over to your state return. States choose whether, and how, to conform to federal depreciation rules. The patterns tend to fall into three groups:

• Full conformity: The state follows the federal Section 179 limit and bonus depreciation.
• Partial conformity: The state follows Section 179 but with a lower dollar limit, or conforms to an older version of the Internal Revenue Code.
• Decoupled from bonus: The state requires you to add back bonus depreciation and recover it over time. California, for example, has long refused to follow federal bonus depreciation and applies a much smaller Section 179 limit.

Some states are still deciding whether to adopt the OBBBA changes, which can mean separate federal and state depreciation schedules. In a decoupling state, using the Section 179 deduction (up to the state’s limit) instead of bonus depreciation can reduce add-backs and simplify your books.

Recapture when business use drops

Section 179 recapture happens when business use of the property falls to 50% or less in any year during the asset’s recovery period. You must add back to ordinary income the difference between the Section 179 deduction you claimed and the depreciation you would have been allowed under regular MACRS through that year. Recapture is reported on Form 4797, Part IV.

This most often hits vehicles that drift into personal use.

Recapture when you sell

When you sell an asset you expensed, the gain up to the amount of the Section 179 deduction and depreciation taken is taxed as ordinary income under Section 1245, not as a capital gain. Since your basis is often zero after expensing, most of the sale price may be ordinary income.

How to Claim the Section 179 Deduction on Form 4562

You claim Section 179 expensing on Form 4562, Depreciation and Amortization, attached to your business return. You can find the current form and instructions on the IRS About Form 4562 page.

Form 4562 at a glance

• Part I, Election to Expense Certain Property Under Section 179: List each asset and the amount you elect to expense, apply the dollar limit and phase-out, apply the business income limitation, and track any carryforward.
• Part II, Special Depreciation Allowance: Report bonus depreciation.
• Part III, MACRS Depreciation: Report regular depreciation on assets placed in service this year and prior years.
• Part V, Listed Property: Report vehicles and other listed property, including business-use percentage and mileage records. Section 179 on vehicles is entered here first, then carried to Part I.
• Part VI, Amortization: Report amortizable costs such as startup costs.

Which return it attaches to

• Sole proprietors and single-member LLCs: Schedule C of Form 1040
• Partnerships and multi-member LLCs: Form 1065, with amounts passed through on Schedule K-1
• S corporations: Form 1120-S, passed through on Schedule K-1
• C corporations: Form 1120

Making, changing, or revoking the election

You can make the Section 179 election on an original return or on an amended return for the year the property was placed in service. You can also revoke or change the specific assets and amounts on an amended return without IRS consent. That flexibility is useful when your income ends up higher or lower than expected.

The de minimis safe harbor is different: it requires an election statement titled “Section 1.263(a)-1(f) de minimis safe harbor election” attached to a timely filed original return. It cannot be made on a late amended return, and those items do not go on Form 4562. For more general filing guidance, see the IRS Small Business and Self-Employed tax center.

Section 179 Deduction Worked Examples

The following examples use round numbers to show how the rules interact. Actual tax savings depend on your bracket, state, entity type, and other deductions.

Example 1: Consulting LLC buys equipment

Maria runs a single-member consulting LLC with $180,000 of net business income in 2026. She buys $60,000 of computers, audio-visual equipment, and office furniture, all placed in service in August and used 100% for business.

• She elects a $60,000 Section 179 deduction, well under the $2,560,000 limit and her $180,000 income.
• Her Schedule C net profit drops to $120,000.
• At a 24% marginal federal rate, the income tax savings are roughly $14,400, before accounting for self-employment tax savings and the smaller QBI deduction.

Note the QBI interaction: lowering business income also lowers the 20% Section 199A deduction. Her net federal benefit is somewhat less than a simple 24% calculation suggests, but still substantial.

Example 2: The business income limitation

Devon’s landscaping company, an S corporation, has $40,000 of taxable income before depreciation. It buys a $100,000 compact track loader in March 2026. Devon has no other business income or wages.

Strategy	2026 Deduction	2026 Result	Carryforward
Elect $100,000 Section 179 only, elect out of bonus	$40,000	$0 taxable income	$60,000 Section 179 carryforward
Elect $40,000 Section 179, bonus on remaining $60,000	$100,000	$60,000 loss	None; loss flows to Devon subject to basis and loss limits
Elect $40,000 Section 179, elect out of bonus	$40,000 plus MACRS on $60,000	Small loss	Remaining basis depreciated over time

If Devon expects higher income next year, carrying forward may be smarter than creating a loss he cannot fully use. Section 179’s elective nature gives him that choice.

Example 3: Heavy SUV at 90% business use

Priya, a real estate broker, buys an $80,000 SUV with a GVWR of 6,500 lb in May 2026. Her mileage log shows 90% business use.

• Business-use basis: $80,000 x 90% = $72,000
• Section 179 deduction on the SUV: capped at $32,000
• Bonus depreciation on the remaining $40,000: 100%, or $40,000
• Total first-year federal deduction: $72,000

Federally, bonus depreciation alone would also reach $72,000. The difference shows up in a state that follows the Section 179 deduction but not bonus depreciation, where the $32,000 Section 179 portion may still be allowed while the bonus portion is added back.

Example 4: De minimis safe harbor for laptops

A 12-person marketing agency buys 12 laptops at $2,200 each, invoiced together for $26,400. It has no AFS and has made the de minimis safe harbor election with a written expensing policy in place since January 1.

• Each laptop costs $2,500 or less, so all $26,400 can be deducted as an ordinary expense.
• No Form 4562 entry, no income limitation, and no Section 179 dollar cap used.
• A $3,000 monitor bought on the same invoice would not qualify, because it exceeds the $2,500 per-item limit. That monitor could still use the Section 179 deduction or bonus depreciation.

Example 5: Hitting the phase-out

A manufacturing company places $4,500,000 of qualifying equipment in service in 2026. It is $410,000 over the $4,090,000 threshold.

• Maximum Section 179 deduction: $2,560,000 – $410,000 = $2,150,000
• Remaining $2,350,000 of equipment: eligible for 100% bonus depreciation
• Total first-year deduction: $4,500,000

For a C corporation at the 21% federal rate, a $4,500,000 deduction reduces federal tax by up to $945,000, assuming enough taxable income. Bonus depreciation does the heavy lifting once Section 179 phases down.

Example 6: Commercial roof replacement

An owner-operated dental practice owns its office building and replaces the roof for $150,000 and the HVAC system for $90,000 in 2026. Both are components of nonresidential real property.

• Neither qualifies for bonus depreciation, because they are building components rather than shorter-lived property.
• Both qualify for the Section 179 deduction as qualified real property.
• With enough business income, the practice can expense the full $240,000 in 2026 instead of depreciating it over the building’s long recovery period.

Common Section 179 Deduction Mistakes to Avoid

1. Confusing purchase date with placed-in-service date

Paying for equipment on December 30 does not help if it arrives in January. Section 179 follows the date the asset is ready for use.

2. Ignoring the business income limitation

Owners with a slow year sometimes elect a large Section 179 deduction, expecting a refund from a loss. The excess simply carries forward. If you need a current-year loss, bonus depreciation is the tool.

3. Guessing at vehicle weight

Do not rely on a dealer’s verbal assurance. Check the GVWR label on the door jamb, and keep a photo with your tax records.

4. Skipping the mileage log

Without contemporaneous records, the IRS can disallow vehicle deductions entirely or argue business use was 50% or less, triggering recapture.

5. Forgetting the state return

A federal return that looks perfect can still produce a surprise state bill if your state decouples from bonus depreciation or caps Section 179 lower. Build state add-backs into your cash-flow planning.

6. Buying just for the deduction

A $50,000 purchase that saves $12,000 in tax still costs $38,000. Expensing only makes sense for assets your business actually needs. Our guide on how to save federal tax covers other strategies that do not require spending.

Section 179 Deduction FAQ

What is the Section 179 deduction limit for 2026?

The 2026 Section 179 deduction limit is $2,560,000. It phases out dollar for dollar once total qualifying property placed in service exceeds $4,090,000 and is fully eliminated at $6,650,000.

Is bonus depreciation better than the Section 179 deduction in 2026?

Neither is always better. Bonus depreciation has no dollar cap and can create a loss. The Section 179 deduction is elective asset by asset, covers commercial roofs, HVAC, and security systems, and is often better treated on state returns. Many businesses use both.

Does the 6,000 lb rule mean I can write off any big SUV?

Only the business-use portion, and only if business use exceeds 50%. For SUVs over 6,000 lb GVWR, the Section 179 portion is capped at $32,000 in 2026, though bonus depreciation can cover the remaining business-use cost.

What happens if my Section 179 deduction exceeds my business income?

The excess carries forward indefinitely to future years. It cannot create a loss in the current year. You may instead elect a smaller Section 179 amount and let bonus depreciation cover the rest.

Do I need to file Form 4562 for the de minimis safe harbor?

No. De minimis items at or under $2,500 per item or invoice (without an AFS) are deducted as ordinary expenses. You do need to attach the annual election statement to your timely filed return.

Does my state allow the Section 179 deduction?

Most states allow some form of Section 179 expensing, but many use a lower limit or do not follow federal bonus depreciation. Always check your state’s conformity rules before finalizing year-end purchases.

Conclusion

The Section 179 deduction remains a cornerstone of small-business tax planning in 2026, even with 100% bonus depreciation now permanent. With a $2,560,000 limit, coverage for commercial roofs and HVAC, and asset-by-asset flexibility, it gives you control that bonus depreciation cannot.

The smartest approach combines all three tools: the de minimis safe harbor for small purchases, the Section 179 deduction where it offers state or property-type advantages, and bonus depreciation to create losses or fill gaps. Get the placed-in-service date right, respect the business income limitation, keep vehicle logs, and plan for recapture and state add-backs.

If you want help modeling these choices alongside your books, our accounting services and Virtual CFO service can keep your fixed-asset records clean all year.

Disclaimer: This article is for general information only and is not tax or legal advice. Tax rules are complex and depend on your specific facts, entity type, and state. Please consult a qualified CPA or tax advisor before making decisions. Figures are current as of September 2026.