Section 179 Equipment Limits 2026: Deduction Caps and Qualifying Property

Section 179 of the Internal Revenue Code lets businesses deduct the full cost of qualifying property in the year it's placed in service — instead of depreciating it over 5, 7, or 15 years. In 2026, the deduction limit is $1,160,000, with a phase-out beginning at $2,890,000 in total equipment purchases. Combined with bonus depreciation (80% in 2026), business owners have powerful first-year write-off tools — but the rules are specific about what qualifies and how to maximize them.

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2026 Section 179 Key Numbers

These limits are indexed for inflation annually. The 2026 amounts represent the IRS-confirmed figures under current law.

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What Qualifies for Section 179

Not all property is eligible. Section 179 covers tangible personal property and certain improvements — not real property (land and buildings). Here's a breakdown:

Fully Qualifying Property

Machinery and equipment used in a trade or business:

• •Manufacturing equipment, CNC machines, lathes, presses
• •Medical and dental equipment (X-ray machines, diagnostic devices, chairs)
• •Restaurant equipment (ovens, refrigeration, grills, dishwashers)
• •Agricultural equipment (tractors, combines, irrigation systems)
• •Construction equipment (excavators, loaders, cranes)

Technology and computers:

• •Computers, servers, workstations, laptops, tablets (business use)
• •Network equipment, routers, switches, cabling
• •Security systems, surveillance cameras
• •Point-of-sale systems

Office furniture and fixtures:

• •Desks, chairs, cubicles, conference tables
• •Filing systems, shelving, display cases
• •Phone systems, copiers, printers

Software (off-the-shelf):

• •Business accounting software (QuickBooks, NetSuite)
• •Design, engineering, and industry-specific software
• •Must be off-the-shelf (not custom-developed software, which uses different depreciation rules)

Qualified Improvement Property (QIP):

• •Improvements to the interior of nonresidential buildings
• •Does NOT include structural components, elevators, escalators, or changes to internal structural framework
• •Examples: tenant buildouts, restaurant interior renovations, flooring, lighting, ceilings

Vehicles over 6,000 lbs GVWR:

• •Subject to specific rules — see the vehicle sections below and Section 179 Qualified Vehicle List 2026

Partial Qualifying Property

Listed property (property subject to special documentation rules):

• •Vehicles (any vehicle used for business)
• •Computers used for both business and personal purposes
• •Any property generally used for entertainment or recreation
• •Must maintain detailed records (mileage logs, usage percentage)

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What Does NOT Qualify for Section 179

Understanding the exclusions prevents costly errors:

Real Property and Structural Components

• •Land: Never depreciable — no deduction
• •Buildings and structures: Must be depreciated over 27.5 years (residential) or 39 years (commercial) — no Section 179
• •Structural components of buildings: Walls, floors, roofs, permanent HVAC systems attached to the building structure

HVAC Systems — An Important Nuance

HVAC is often misclassified:

• •Central HVAC as part of the building structure → NOT eligible (39-year depreciation)
• •Rooftop HVAC units → Generally considered a structural component → NOT eligible for Section 179 in most cases
• •Portable HVAC / standalone window units → May qualify as personal property
• •HVAC improvements to existing commercial property → May qualify as QIP under certain conditions

This is one of the most frequently litigated areas of Section 179. When in doubt, consult a CPA or cost segregation specialist.

Other Exclusions

• •Property used outside the U.S.
• •Property used by tax-exempt organizations
• •Property used to furnish lodging (with exceptions for hotels and motels)
• •Air conditioning and heating units as part of building (as noted above)
• •Custom software / internally developed software (uses amortization rules)

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The Phase-Out Mechanism

The Section 179 deduction phases out dollar-for-dollar once total equipment purchases exceed $2,890,000 in 2026.

``` Phase-Out Calculation:

Total qualifying property placed in service: $3,200,000 Phase-out threshold: ($2,890,000) Excess above threshold: $310,000

Maximum Section 179 deduction: $1,160,000 Reduced by excess: ($310,000) Available Section 179 deduction: $850,000

At $4,050,000 in total purchases → Section 179 deduction = $0 ```

This phase-out is designed so that Section 179 primarily benefits small and mid-size businesses, not large corporations with hundreds of millions in equipment purchases (which use MACRS depreciation instead).

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Bonus Depreciation in 2026: The Interaction

Bonus depreciation (also called the "additional first-year depreciation allowance") is a separate but complementary provision that allows businesses to deduct a percentage of asset costs in year one.

Bonus Depreciation Schedule Under Current Law

Note: The 2026 rate reflects the bonus depreciation restoration under the Tax Relief for American Families and Workers Act provisions. Verify current law with your CPA as legislative changes occur.

Key Differences: Section 179 vs. Bonus Depreciation

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How to Maximize Between Section 179 and Bonus Depreciation

The strategic interplay between Section 179 and bonus depreciation depends on your income, business structure, and state taxes.

Strategy 1: Max Section 179 First, Then Bonus

For businesses with significant taxable income:

``` Business: S corp with $800,000 net income before depreciation Equipment purchased in 2026: $500,000

Section 179 deduction: $500,000 (takes entire purchase) Remaining to deduct via bonus: $0 Taxable income after deduction: $300,000

Result: $500,000 fully deducted in Year 1 via Section 179 ```

Strategy 2: Use Bonus Depreciation When Income is Low or Negative

Section 179 cannot exceed your taxable income (business income limitation). If your business is operating at a loss or near breakeven:

``` Business: LLC with $150,000 net income before depreciation Equipment purchased: $300,000

Section 179 attempt: $150,000 max (limited by taxable income) Carryforward: $150,000 (carried to 2027)

OR:

Bonus depreciation: $240,000 (80% of $300,000) — no income limit Additional deduction: $240,000 in Year 1 (can create a $90,000 loss) That loss can offset other income or carry forward ```

Strategy 3: Partial Elections

You don't have to apply Section 179 to all eligible property. You can elect Section 179 on specific assets and use bonus depreciation on others. This allows precise income management.

Strategy 4: Consider QBI Deduction Impact

For pass-through entity owners claiming the 20% Qualified Business Income (QBI) deduction, large depreciation deductions reduce QBI, which in turn reduces the QBI deduction. Modeling the interaction is important — sometimes a smaller Section 179 deduction in a high-income year preserves more QBI benefit.

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Listed Property Restrictions

"Listed property" — primarily vehicles and computers with mixed business/personal use — faces stricter rules:

• •Must use the property more than 50% for business to use Section 179 or bonus depreciation
• •If business use drops to 50% or below in a subsequent year, you must recapture the excess depreciation as ordinary income
• •Must maintain contemporaneous records (mileage logs for vehicles; usage logs for computers)

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SUV Deduction Cap: $32,000 in 2026

Heavy SUVs (vehicles with GVWR of 6,001–14,000 lbs) are subject to a special Section 179 limitation:

``` Heavy SUV Section 179 Limit (2026): $32,000

Example: Purchase a $75,000 Cadillac Escalade (100% business use) Section 179 deduction: $32,000 Remaining basis: $43,000 Bonus depreciation (80%): $34,400 First-year total deduction: $66,400 Remaining basis depreciated over 5 years: $8,600 ```

For full deduction vehicles (pickup trucks with 6-foot+ beds, cargo vans), the $32,000 SUV cap does not apply. See Section 179: SUV vs. Truck Deduction 2026 for a detailed comparison.

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State Conformity Issues

This is where many business owners get surprised. States handle Section 179 and bonus depreciation differently:

States With Full or Partial Conformity to Federal Section 179

Most states adopt Section 179 but may have lower caps or different qualifying property rules:

States That Do NOT Conform to Bonus Depreciation

Practical impact in California: If you take $200,000 in bonus depreciation on your federal return, California will add that $200,000 back to your state taxable income. You get the deduction on your federal return but not your state return. You'll eventually get the California deduction through regular depreciation — but not in Year 1.

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Section 179 Election Mechanics

To take a Section 179 deduction, you must:

• 1.Make the election on Form 4562 — filed with your tax return for the year the property is placed in service
• 2.Specify each asset — list each piece of property, its cost, and the deduction claimed
• 3.Meet the business income limitation — your Section 179 deduction cannot exceed your net business income for the year
• 4.Place the property in service during the tax year — you must actually have the property in use before year-end, not just ordered or paid for

Timing Trap

Purchasing equipment on December 31 qualifies if it's placed in service that day. Simply ordering or paying a deposit does not create a placed-in-service date. For vehicles, the property must be in your possession and available for business use.

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Worked Example: Full Optimization

Business: S corporation, medical practice, $620,000 net income before depreciation 2026 Equipment Purchases:

• •MRI machine: $800,000 (new)
• •Office furniture: $45,000
• •Medical diagnostic equipment: $175,000
• •Practice management software: $22,000
• •Heavy SUV (Chevy Suburban, 100% business): $68,000

Total qualifying purchases: $1,110,000

``` Section 179 Analysis: Total purchases ($1,110,000) < deduction cap ($1,160,000) ✓ Total purchases ($1,110,000) < phase-out threshold ($2,890,000) ✓ → No phase-out applies

Net income before depreciation: $620,000 Maximum Section 179: min($1,110,000, $620,000) = $620,000 [income limit]

Apply Section 179 to: MRI machine: $620,000 (partial — $180,000 remains) Section 179 deduction: $620,000

Bonus depreciation on remaining: MRI machine remainder: $180,000 × 80% = $144,000 Office furniture: $45,000 × 80% = $36,000 Diagnostic equipment: $175,000 × 80% = $140,000 Software: $22,000 × 80% = $17,600 SUV: $32,000 cap → remaining $36,000 × 80% = $28,800 Total bonus depreciation: $366,400

Total Year 1 Deduction: $986,400

Taxable income: $620,000 − $620,000 (179) = $0 Loss from bonus: ($366,400) — carried back or forward ```

This is an aggressive but legal strategy. The MRI's remaining $180K and other assets are deducted via bonus depreciation, potentially creating a taxable loss for the year that offsets other income.

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Related tools: Section 179 Calculator | Bonus Depreciation Calculator | Income Tax Calculator