A Comprehensive Guide to Understanding Bonus Depreciation
Understanding Bonus Depreciation: How 100% Expensing Can Reduce Business Taxes
Bonus depreciation allows businesses and investors to accelerate deductions for qualifying property instead of recovering the cost over many years. With 100% bonus depreciation permanently restored for qualifying property acquired after January 19, 2025, equipment purchases, improvements, vehicles, technology, and certain real estate components can create substantial tax-planning opportunities.
Bonus depreciation is one of the most powerful tools available for accelerating business tax deductions. Rather than waiting five, seven, fifteen, or even twenty years to recover the cost of certain qualifying assets, a business may be able to deduct 100% of the qualifying cost in the year the property is placed in service.
That does not mean every business asset can simply be written off immediately—or that taking the largest possible deduction today is always the best strategy. Asset classification, acquisition date, placed-in-service date, business use, financing, entity structure, state tax treatment, future income, and eventual depreciation recapture can all affect the decision.
What Is Bonus Depreciation?
Bonus depreciation—technically the additional first-year depreciation deduction— is an accelerated depreciation provision that allows qualifying businesses to deduct a substantial portion, and currently often 100%, of eligible property in the year the asset is placed in service.
Under ordinary MACRS depreciation, a business generally recovers the cost of depreciable property over an assigned recovery period. Bonus depreciation accelerates that recovery into the first year.
100% bonus depreciation is back—and the restoration is permanent.
For qualifying property acquired after January 19, 2025, federal law generally allows a 100% additional first-year depreciation deduction when the applicable requirements are satisfied.
Businesses can review detailed federal depreciation guidance in IRS Publication 946, How to Depreciate Property .
The Current Rule: Permanent 100% Bonus Depreciation
The original version of this article discussed the scheduled phase-down of bonus depreciation from 100% to 80%, 60%, 40%, 20%, and ultimately zero.
That phase-down is no longer the current rule for qualifying property acquired after January 19, 2025.
Federal legislation enacted in 2025 permanently restored 100% bonus depreciation under Internal Revenue Code Section 168(k) for eligible property acquired after January 19, 2025.
| Property Timing | General Federal Treatment |
|---|---|
| Qualified property acquired after January 19, 2025 | Generally eligible for 100% bonus depreciation when the property otherwise qualifies and is placed in service. |
| Certain property acquired before January 20, 2025 | Transitional and prior-law percentage rules can still apply depending on acquisition and placed-in-service dates. |
| Property that does not qualify for bonus depreciation | May still be depreciated under MACRS or may potentially qualify for another expensing provision such as Section 179. |
The IRS issued updated guidance on the permanent 100% additional first-year depreciation deduction following the legislative change.
How Bonus Depreciation Works
Consider a business that purchases a qualifying piece of equipment for $100,000.
The business purchases the asset.
Assume the equipment has a $100,000 depreciable basis and otherwise qualifies for bonus depreciation.
The equipment is placed in service.
Depreciation generally begins when the asset is ready and available for its intended business use— not merely when the purchase contract is signed.
The business applies bonus depreciation.
If the asset qualifies for 100% bonus depreciation, the business could potentially deduct the entire $100,000 depreciable basis during the first year.
Taxable business income is reduced.
The deduction can significantly reduce current-year taxable income and may affect other tax calculations, losses, basis, and future depreciation.
Buying something by December 31 is not necessarily enough.
Depreciation generally depends on when the asset is placed in service. Equipment sitting unopened in a warehouse or a vehicle not yet ready for business use may create a different result from an asset that is operational and available for use.
What Property Qualifies for Bonus Depreciation?
Bonus depreciation is broad, but it does not apply to every asset a business purchases.
Qualifying property commonly includes certain depreciable property with a MACRS recovery period of 20 years or less, along with several other specifically eligible property categories.
Machinery & Business Equipment
Machinery, manufacturing equipment, tools, office equipment, computers, furniture, and many other tangible business assets can potentially qualify.
Certain Business Vehicles
Vehicles can qualify, but passenger automobile limits, business-use requirements, listed-property rules, and special treatment for certain heavier vehicles can materially affect the deduction.
Qualified Improvement Property
Certain improvements to the interior of nonresidential real property after the building was first placed in service may qualify as Qualified Improvement Property, commonly called QIP.
Other categories may include certain computer software, qualified film, television, theatrical, and sound recording productions, certain water utility property, specified plants, and other property specifically included under the tax law.
The IRS maintains detailed definitions and exclusions in Publication 946 .
Does Used Property Qualify?
One of the most valuable features of modern bonus depreciation rules is that qualifying property does not necessarily have to be brand new.
Used property can potentially qualify. However, special acquisition rules apply.
Among other requirements, the taxpayer generally cannot have previously used the property, and certain acquisitions from related parties or through specified nonrecognition transactions can be excluded.
New to you can potentially be enough.
A qualifying used piece of equipment purchased in an arm's-length transaction can potentially receive bonus depreciation even though another business previously owned and operated it.
Related-party purchases deserve particular attention because the federal acquisition requirements are designed to prevent taxpayers from simply moving existing assets among related entities to generate new depreciation deductions.
Can Real Estate Investors Use Bonus Depreciation?
Yes—but generally not by simply deducting the entire purchase price of a residential rental property or commercial building.
Buildings themselves commonly have depreciation recovery periods longer than the typical 20-year bonus depreciation threshold. However, many components within real estate can have shorter tax lives.
This Is Where Cost Segregation Becomes Important
A cost segregation study analyzes components of real property and identifies assets that may properly fall into shorter depreciation classes.
Depending on the property, this can potentially identify qualifying five-year, seven-year, or fifteen-year assets that may then be eligible for bonus depreciation.
Cost segregation does not simply “turn a building into a write-off.”
The strategy works by properly identifying and reclassifying qualifying components according to their tax treatment. The classification must be supportable, and depreciation recapture and passive-activity rules should also be considered.
For investors, bonus depreciation should therefore be evaluated alongside depreciation schedules, passive-loss rules, expected holding period, eventual property disposition, and the investor's broader tax plan.
Bonus Depreciation vs. Section 179
Bonus depreciation and Section 179 expensing can both accelerate deductions, but they are not interchangeable.
| Feature | Bonus Depreciation | Section 179 |
|---|---|---|
| 2026 Maximum | No comparable overall annual dollar cap on qualifying bonus depreciation property. | Maximum Section 179 expense deduction of $2,560,000 for 2026, subject to applicable limitations. |
| 2026 Investment Phaseout | No equivalent overall investment phaseout. | Deduction begins phasing out when qualifying property placed in service exceeds $4,090,000. |
| Taxable Income Limitation | Bonus depreciation can potentially create or increase a tax loss, subject to other tax rules. | Section 179 generally has a taxable-business- income limitation, with unused amounts potentially carried forward. |
| Flexibility | Bonus depreciation generally applies by property class unless a valid election is made out or another permitted election applies. | Taxpayers generally have greater ability to select how much Section 179 treatment to apply to specific qualifying property. |
Businesses frequently coordinate Section 179 and bonus depreciation instead of treating the provisions as an either-or decision.
The biggest deduction is not automatically the best tax strategy.
A business expecting substantially higher taxable income next year may prefer to preserve some depreciation. Another taxpayer may benefit significantly from accelerating deductions now. The answer depends on more than the purchase price of the asset.
Can You Claim Bonus Depreciation on Financed Equipment?
Potentially, yes.
The tax deduction is generally based on the qualifying depreciable basis of property—not simply the amount of cash paid as a down payment during the year.
That means a business may purchase qualifying equipment with financing, place the equipment in service, and potentially claim bonus depreciation based on the qualifying depreciable basis even though the financing will be repaid over future years.
This can create a powerful cash-flow effect.
A business might finance an equipment purchase over several years while accelerating much of the tax deduction into the first year. But the debt still has to be repaid, so the economic decision should make sense before considering the tax benefit.
Benefits—and Potential Drawbacks—of Bonus Depreciation
Immediate Tax Savings
Accelerating depreciation can substantially reduce current taxable income and potentially preserve cash that can remain inside the business.
Improved Cash Flow
Tax savings generated today can potentially be used for payroll, debt reduction, additional equipment, inventory, expansion, or other business needs.
Fewer Future Deductions
Accelerating a deduction into the current year generally means that depreciation will not remain available in future years on the same basis that would have existed under regular depreciation.
Other Issues to Consider
- Whether the business actually needs the asset.
- Current versus expected future tax rates.
- Whether accelerated depreciation creates or increases a net operating loss.
- Basis consequences.
- Passive-activity limitations for rental real estate.
- Depreciation recapture when an asset is later sold.
- Business-use requirements for certain vehicles and listed property.
- State income-tax conformity.
What Happens When You Sell an Asset After Taking Bonus Depreciation?
One reason bonus depreciation should be viewed as part of a long-term plan is that depreciation can affect the tax result when the asset is eventually sold.
Depreciation reduces the asset's adjusted tax basis. If the asset is later sold for more than that adjusted basis, depreciation recapture or other gain-recognition rules can apply.
A deduction today can affect the tax calculation tomorrow.
Bonus depreciation is not necessarily “free money.” It accelerates cost recovery. Sale proceeds, adjusted basis, asset classification, and recapture rules should be considered when modeling the long-term tax result.
The IRS provides additional information regarding depreciation recapture when business property is disposed of.
Does Alabama Follow the Federal Bonus Depreciation Rule?
State treatment is an important part of any depreciation analysis because states do not automatically conform to every change in federal tax law.
For the current federal restoration of 100% bonus depreciation under Section 168(k), Alabama's published analysis of the 2025 federal tax legislation identifies Alabama as tied to the federal provision for the relevant business income-tax rules.
Federal and Alabama depreciation should still be tracked carefully.
Historical Alabama depreciation differences can remain relevant for older assets, and basis differences from prior-law decoupling can continue to affect dispositions and recapture calculations.
Alabama businesses should therefore maintain complete federal and state depreciation schedules rather than assuming every historic asset has identical federal and Alabama basis.
When Should a Business Use Bonus Depreciation?
Bonus depreciation is most valuable when it is treated as a planning decision instead of a tax-software checkbox.
Before automatically claiming the maximum available deduction, consider:
What is taxable income this year?
Accelerated depreciation may be particularly valuable during a high-income year, but its value depends on the taxpayer's entire return.
What income is expected next year?
Using every available deduction today can leave fewer depreciation deductions available during future higher-income years.
How long will the asset be held?
A planned sale in the near future may make depreciation recapture and basis consequences more relevant.
How does this fit with the rest of the tax plan?
Entity structure, retirement contributions, compensation, Section 179, QBI, losses, real estate, financing, and other strategies should be analyzed together rather than independently.
Depreciation Should Be Planned Before the Asset Is Purchased
Our tax-planning work evaluates equipment purchases, vehicles, real estate improvements, Section 179, bonus depreciation, entity structure, projected income, and long-term tax consequences together—so a large deduction actually supports the broader business strategy.
Explore Tax Planning ResourcesBonus Depreciation Is Powerful—But It Should Be Strategic
Permanent 100% bonus depreciation gives businesses a powerful opportunity to accelerate deductions for qualifying capital investments.
Machinery, equipment, technology, certain vehicles, qualified improvement property, and shorter-lived components identified through a properly supported cost segregation study can all potentially create substantial first-year deductions.
But accelerated depreciation changes basis, reduces future depreciation, can affect losses, and may create depreciation recapture when property is eventually sold.
The goal should not simply be to create the biggest deduction possible. The goal is to use depreciation at the time and in the manner that produces the strongest long-term tax result.
Frequently Asked Questions
What is the bonus depreciation percentage in 2026?
Qualifying property acquired after January 19, 2025 generally may qualify for 100% additional first-year depreciation. Special transitional rules can apply to property acquired under earlier rules, so acquisition and placed-in-service dates should both be reviewed.
Is 100% bonus depreciation permanent now?
Yes. Federal legislation enacted in 2025 permanently restored 100% bonus depreciation for qualifying property acquired after January 19, 2025, subject to the applicable eligibility rules.
Can used equipment qualify for bonus depreciation?
Yes, qualifying used property can potentially receive bonus depreciation. However, special acquisition rules apply, including restrictions involving prior use by the taxpayer and certain related-party transactions.
Can I take bonus depreciation on a financed asset?
Potentially, yes. Depreciation generally relates to the qualifying depreciable basis of property rather than simply the cash down payment. The asset must still satisfy the applicable ownership, business-use, placed-in-service, and eligibility requirements.
Is Section 179 the same as bonus depreciation?
No. Both can accelerate deductions, but they have different eligibility requirements, dollar limits, taxable-income rules, elections, and planning consequences. For 2026, the maximum Section 179 deduction is $2,560,000 before applying the applicable limitations.
Can rental property qualify for bonus depreciation?
The residential or commercial building itself generally has a recovery period too long to qualify for ordinary bonus depreciation, but qualifying shorter-life property associated with the building may qualify. This is one reason cost segregation analysis can be important for real estate investors.
Does taking bonus depreciation affect me when I sell the asset?
It can. Depreciation reduces adjusted tax basis, and the later sale of depreciated property can trigger depreciation recapture or other taxable gain. The eventual disposition should therefore be considered when evaluating accelerated depreciation.
Does Alabama follow the current federal 100% bonus depreciation rule?
Alabama's published analysis of the federal 2025 tax-law changes identifies the state as tied to the current federal Section 168(k) provision restoring 100% bonus depreciation. Historical federal and Alabama basis differences can still exist for older property and should continue to be tracked.
Should every business take 100% bonus depreciation?
Not automatically. Accelerating the deduction may be extremely valuable, but a business should consider current income, projected future income, losses, tax rates, basis, recapture, financing, Section 179, state tax treatment, and long-term plans before deciding how aggressively to depreciate new assets.
How can bonus depreciation affect a future business sale or investor?
Accelerating deductions today reduces the remaining tax basis and future depreciation available on the affected assets. When preparing for an investment, acquisition, or business sale, buyers and advisors may therefore review the depreciation schedules, remaining basis, future deductions, and potential recapture exposure as part of the transaction.
What about assets purchased from or leased through a related business?
Related-party arrangements require additional analysis. Bonus depreciation has acquisition rules that can restrict certain related-party purchases, and the taxpayer claiming depreciation generally needs to be the appropriate tax owner of the property. Ownership, leases, basis, business use, and the economic substance of the transaction should be documented carefully.
Before You Buy the Asset, Know What the Tax Deduction Can Do.
Azalea City Tax & Accounting can evaluate bonus depreciation, Section 179, equipment purchases, vehicles, real estate improvements, cost segregation, financing, and projected income before you make a major capital investment. The objective is not simply a bigger deduction—it is a better tax strategy.