Yes, in many cases, you can combine Section 179 deduction and bonus depreciation for the same qualifying asset. This strategy allows commercial property owners and businesses to maximize tax savings by deducting a significant portion—or even the full cost—of eligible assets in the year they are placed into service. However, specific IRS rules, annual limits, and eligibility requirements determine how these deductions can be applied.
If you’re investing in commercial roofing improvements, equipment, or other qualifying business assets, understanding how these two tax provisions work together can help you make more informed financial decisions.
Understanding Section 179
Section 179 allows businesses to deduct the purchase price of qualifying property instead of depreciating it over several years. Rather than spreading deductions across the asset’s useful life, eligible businesses can expense all or part of the cost immediately.
Key features include:
- Applies to qualifying business equipment and certain building improvements.
- Annual deduction limits and spending thresholds apply.
- The deduction generally cannot exceed your taxable business income.
- The asset must be purchased and placed into service during the tax year.
Section 179 gives business owners flexibility because they can choose how much of the asset’s cost to deduct, up to the allowable limit.
What Is Bonus Depreciation?
Bonus depreciation allows businesses to deduct a large percentage of an asset’s remaining cost in the first year after any applicable Section 179 deduction has been taken.
Unlike Section 179:
- It is generally not limited by taxable income.
- It applies to many new and used qualifying assets.
- The allowable percentage depends on the tax laws in effect for the year the asset is placed into service.
- It can often create or increase a business loss.
Because tax laws have changed over recent years, the available bonus depreciation percentage may vary depending on when the asset is purchased and placed into service.
Can They Be Used Together?
Yes. In many situations, the IRS allows businesses to use Section 179 first, followed by bonus depreciation on the remaining depreciable basis of the same qualifying asset.
For example:
- A business purchases a qualifying asset for $100,000.
- It elects to deduct $40,000 under Section 179.
- The remaining $60,000 becomes eligible for bonus depreciation if it qualifies.
- Any balance not deducted may then be depreciated using regular MACRS depreciation.
This layered approach often produces the largest immediate deduction while giving businesses flexibility in tax planning.
How This May Apply to Commercial Roofing
Commercial roofing projects can involve several different types of expenditures, and not every roofing expense qualifies the same way.
For example:
- Roofing equipment purchased by a roofing contractor may qualify for both Section 179 and bonus depreciation.
- Certain improvements to nonresidential commercial buildings may qualify depending on current IRS definitions and applicable tax laws.
- Routine roof repairs are generally treated as deductible business expenses rather than depreciable assets.
- Complete roof replacements are often capital improvements that may have different depreciation rules.
Because roofing projects vary significantly, it’s important to classify each expense correctly before determining which tax benefits apply.
Benefits of Combining Both Deductions
Using Section 179 and bonus depreciation together may provide several advantages:
- Reduce current-year taxable income.
- Improve cash flow by lowering tax liability.
- Recover investment costs much faster than traditional depreciation.
- Support larger capital improvement projects.
- Provide greater flexibility when managing business tax strategies.
Many businesses use this combination when purchasing equipment, upgrading facilities, or making qualifying property improvements.
Important Considerations
Although combining these deductions is common, several factors can affect eligibility:
- Annual Section 179 deduction limits.
- Taxable income restrictions for Section 179.
- Bonus depreciation percentages in effect for the tax year.
- Whether the asset qualifies under current IRS regulations.
- State tax laws, which may not follow federal depreciation rules.
Additionally, businesses should maintain detailed records showing purchase dates, invoices, installation dates, and the date each asset was placed into service.
Work With Qualified Professionals
Tax depreciation rules can be complex, especially when they involve commercial construction projects and roofing improvements. A qualified CPA or tax advisor can determine whether Section 179, bonus depreciation, or a combination of both provides the greatest tax benefit for your specific situation.
Likewise, working with an experienced commercial roofing contractor helps ensure projects are properly documented, accurately classified, and completed according to applicable building codes and manufacturer requirements.
Shieldline Roofing’s Expert Opinion
Yes, Section 179 and bonus depreciation can potentially be used on the same asset, but you do not simply deduct the full cost twice. The IRS applies the deductions in a specific order: Section 179 first, then the special depreciation allowance (bonus depreciation), followed by regular MACRS depreciation on any remaining basis.
Our Key Insights
The IRS specifically explains that the special depreciation allowance is an additional deduction taken after any Section 179 deduction and before regular depreciation. If you use Section 179 to deduct only part of an asset’s cost, the remaining basis can generally be eligible for depreciation, including bonus depreciation when the property qualifies.
Final Thoughts
Yes, businesses can often combine Section 179 and bonus depreciation for the same qualifying asset, allowing them to maximize first-year tax deductions. Section 179 is generally applied first, followed by bonus depreciation on the remaining eligible basis, with regular depreciation used if any balance remains.
For commercial property owners planning roof-related capital investments, understanding these tax strategies can improve budgeting, cash flow, and long-term financial planning. Since eligibility depends on the nature of the asset and current tax regulations, always consult a qualified tax professional before making depreciation elections. Learn More
