When it comes to maximizing tax deductions on business asset purchases and renovations, two powerful tools stand out: Section 179 expensing and bonus depreciation.
Both offer significant opportunities to accelerate deductions and reduce taxable income, but understanding when and how to use each can make a substantial difference in your tax savings.
Accelerated Expensing Tools for Investors
Real-estate investors, business owners, and entrepreneurs have two accelerated depreciation provisions available to them, and the choice between them changes the result.
Section 179 expensing allows taxpayers to deduct the full cost of qualifying property in the year it’s placed in service (instead of depreciating it over several years). Meanwhile, bonus depreciation provides an additional first-year deduction on qualifying assets.
What Is Section 179?
The section 179 deduction is a powerful tax provision that allows businesses to expense the full cost of qualifying property in the year of purchase, rather than spreading the deduction over multiple years through traditional depreciation. This deduction applies to property that you acquire by purchase for use in the active conduct of your trade or business.
Section 179 Key Features
- For tax years beginning in 2025, the maximum Section 179 expense deduction is $2,500,000.
- Correspondingly, the phase-out threshold — i.e., the amount of qualifying purchases after which the deduction begins to dollar-for-dollar phase out — begins at $4,000,000 for 2025.
- That means once your total Section 179-eligible asset purchases exceed about $4,000,000 in the year, the Section 179 deduction begins to shrink, and once purchases hit around ~$6.5 M (or whatever the phase-out fully eliminates the deduction) you get no Section 179 deduction.
- Business-income limitation: You cannot use Section 179 to create or increase a net loss from your active trade or business—your deduction is capped at your taxable income from the business (excluding certain carryforward rules apply).
- The deduction must be elected (via Form 4562) and is applied to property placed in service during the tax year.
2024 Limits:
- Maximum deduction: $1,220,000
- Phase-out threshold: $3,050,000
- SUV limit: $30,500
2025 Updated Limits:
- Maximum section 179 expense deduction increases to $2,500,000, with the phase-out threshold rising to $4,000,000
- SUV limit increases to $31,300
2026 Limits:
- Maximum deduction: $2,560,000
- Phase-out threshold: $4,090,000
- SUV limit: $32,000
Qualifying Property for Section 179
Typical qualifying assets include:
- Tangible personal property used in a trade or business (machinery, equipment, furniture/fixtures)
- Off-the-shelf computer software
- Qualified Section 179 real property (certain improvements to non‐residential real property) — e.g., roofs, HVAC systems, fire protection systems, security systems.
- Note: Land is not eligible; the property must be used more than 50% for business, etc.
Business Income Limitation
A critical restriction of the Section 179 deduction is the business income limitation: the total cost you can deduct is limited to your taxable income from the active conduct of a trade or business during the year. Any excess deduction you don’t use because of income limitation can be carried forward to future years (for Section 179 property) under certain rules.
What Is Bonus Depreciation?
How does bonus depreciation work? Bonus depreciation is an accelerated depreciation method that allows businesses to take an additional first-year depreciation deduction on qualifying property.
The special depreciation allowance is 100% for qualified property acquired and placed in service after January 19, 2025, made permanent by the One Big Beautiful Bill Act. Lower rates applied to property acquired before that date.
Bonus Depreciation Percentages by Year
2024 Rates:
- Standard qualifying property: 60%
- Long production period property and certain aircraft: 80%
2025 Transition:
- For property acquired and placed in service before January 19, 2025: Standard property at 40%, long production period property and certain aircraft at 60%.
- For property acquired and placed in service on or after January 19, 2025: Bonus depreciation is restored to 100% permanently under the OBBBA.
Beyond 2025:
- The previous phase-out schedule has been repealed. Qualified property will continue to be eligible for a full 100% deduction in the year placed in service.
Qualifying Property for Bonus Depreciation
Qualified property includes tangible property depreciated under MACRS with a recovery period of 20 years or less, computer software defined in and depreciated under section 167(f)(1), water utility property, and qualified film, television, and live theatrical productions.
Bonus depreciation applies to both new and used property, making it broader than the original use requirement that previously limited bonus depreciation to new assets only
Key Differences: Limits, Use Cases, State Treatment
Understanding the fundamental differences between bonus depreciation vs Section 179 is essential for optimal tax planning:
Application Methods
Section 179: Applied on an asset-by-asset basis, giving taxpayers flexibility to choose which specific assets to expense.
Bonus Depreciation: Must be applied to all assets within an asset class life, providing less flexibility but potentially greater overall deductions.
State Tax Treatment
State tax treatment varies significantly between these deductions. Many states don’t conform to federal bonus depreciation rules, potentially creating state-federal differences that require careful planning. Section 179 also has varying state conformity, making professional tax advice crucial for multi-state operations.
Loss Creation Ability
A critical difference lies in loss creation: Section 179 expensing cannot be used to create a loss due to the business income limitation, while bonus depreciation has no such restriction.
Assets Eligible for Both Deductions
Many assets qualify for both section 179 and bonus depreciation, including:
- Office equipment and furniture
- Manufacturing equipment
- Vehicles used in business (with specific limitations)
- Computer hardware and software
- Qualified improvement property
Section 179 Exclusive Assets
Qualified real property improvements, including roofs, heating and ventilation systems, air conditioning units, fire protection and alarm systems, and building security systems qualify for Section 179 but may not be eligible for bonus depreciation.
Bonus Depreciation Exclusive Assets
Land improvements qualify for bonus depreciation but are specifically excluded from Section 179 treatment.
When to Use Section 179
Optimal Section 179 Scenarios
- Limited Business Income: When business income is close to or below the asset purchase amount, Section 179’s income limitation and carryforward provision provides flexibility.
- Asset Selection Flexibility: Use maximum permitted Section 179 expensing on qualified improvement property if the taxpayer has purchased assets that exceed the maximum Section 179 expense deduction for the tax year.
- Longer-Life Assets: Applying Section 179 to assets with longer depreciation periods (like 15-year qualified improvement property) maximizes current tax savings.
- Controlled Groups: When multiple related entities need to coordinate deductions, Section 179’s controlled group rules require strategic planning across all entities.
Strategic Section 179 Applications
Real Estate Improvements: Section 179 works exceptionally well for qualifying building improvements, allowing full expensing of renovation costs that would otherwise be depreciated over 15 years.
Equipment Purchases: For businesses making significant equipment investments, Section 179 provides immediate tax relief, improving cash flow for reinvestment.
Where bonus depreciation stands after the 2025 legislation, and which placed-in-service dates take 100% rather than 40%, is set out in 100% bonus depreciation, now permanent.
When to Use Bonus Depreciation
Optimal Bonus Depreciation Scenarios
- High-Income Years: When business income significantly exceeds asset costs, bonus depreciation maximizes deductions without income limitations.
- Large Asset Purchases: Bonus depreciation needs to be applied to all assets within an asset class life, making it ideal for substantial equipment acquisitions.
- Loss Planning: For taxpayers who can benefit from creating losses (subject to passive activity and excess business loss rules), bonus depreciation provides more aggressive deduction timing.
- Used Asset Purchases: Bonus depreciation’s eligibility for used property makes it valuable for businesses acquiring pre-owned equipment.
Strategic Bonus Depreciation Applications
Fleet Purchases: When acquiring multiple vehicles or equipment pieces in the same class, bonus depreciation can provide substantial first-year deductions.
Manufacturing Operations: Large-scale equipment purchases benefit from bonus depreciation’s unlimited dollar amounts and class-wide application.
Can You Take Section 179 and Bonus Depreciation on Vehicles?
Can you take section 179 and bonus depreciation on vehicles? The interaction between these deductions for vehicles requires careful consideration of passenger automobile limits and business use requirements.
Vehicle Deduction Limitations
For passenger automobiles, the total of section 179 expense deduction and depreciation deduction (including special depreciation allowance) cannot exceed specific annual limits:
2024 Passenger Vehicle Limits:
- Standard limit: $12,400
- With bonus depreciation: $20,400 (for qualifying vehicles acquired after September 27, 2017)
Section 179 Vehicles Strategy
Business Use Requirement: Section 179 property must be used more than 50% for business purposes. This requirement affects both the initial deduction and potential recapture if business use drops below 50%.
SUV Exception: Heavy SUVs weighing more than 6,000 pounds but not more than 14,000 pounds are limited to $30,500 under Section 179, but this limit doesn’t apply to vehicles designed to seat more than nine passengers or those with specific cargo configurations.
Combining Deductions on Vehicles
The general approach for section 179 vehicles involves:
- Apply Section 179 up to the annual limit
- Apply bonus depreciation to the remaining basis
- Use regular MACRS depreciation for any remaining basis
This stacking approach maximizes first-year deductions while staying within legal limits.
Key takeaways for maximizing these deductions:
- Section 179 provides flexibility and works well for businesses with limited income or specific asset selection needs
- Bonus depreciation offers unlimited dollar amounts but less flexibility in application
- Vehicle deductions can combine both methods within annual limits
- 2025 planning should account for restored 100% bonus depreciation and increased Section 179 limits
The evolving landscape of these deduction tools requires ongoing attention to regulatory changes and strategic tax planning. Working with qualified tax professionals ensures optimal utilization of these powerful deduction strategies while maintaining compliance with complex IRS regulations.
For businesses making significant asset investments, the combination of these deduction tools can provide substantial tax savings and improved cash flow, making them essential components of comprehensive tax planning strategies.
Ready to Optimize Your Tax Deductions?
At Hiltzik CPA, our experienced tax professionals specialize in advanced depreciation strategies for real estate investors and business owners. We’ll analyze your asset purchases, evaluate your income projections, and develop a customized deduction strategy that maximizes your tax benefits while ensuring full compliance with IRS regulations.
Don’t leave money on the table with suboptimal deduction choices. Contact Hiltzik CPA today to schedule a consultation and discover how the right depreciation strategy can significantly reduce your tax burden and improve your cash flow.
Schedule Your Tax Strategy Consultation Now
Let our expertise guide you through the complexities of Section 179 vs bonus depreciation, so you can focus on growing your business while minimizing your tax liability.
