Section 179 vs Bonus Depreciation in 2026: Which Deduction Should You Use?
With bonus depreciation back at 100% permanently, Section 179 is no longer the obvious first choice. The two provisions solve different problems.
Can You Take Section 179 on Rental Property?
Sometimes, but Section 179 does not apply to the rental building or land, and a landlord cannot claim it merely because furniture, appliances, equipment, or improvements are used in a rental. The asset must be eligible Section 179 property acquired for the active conduct of a trade or business. A noncorporate owner that leases property to others must also clear the special lessor limitation. The placed-in-service date, business-use percentage, taxable-income ceiling, ownership entity, and passive-loss rules can change the result.
The current IRS Publication 946 says property acquired only for the production of income, including rental property when renting is not the taxpayer's trade or business, does not qualify. It also states that an individual or other noncorporate lessor generally cannot expense property leased to someone else unless a statutory exception is met. These are separate gates: proving a rental trade or business does not automatically eliminate the lessor test.
| Rental cost | Section 179 starting point | Likely alternative |
|---|---|---|
| Residential rental building | Not Section 179 property. | 27.5-year depreciation under GDS when applicable; shorter-lived components require separate support. |
| Land or land improvements | Land and land improvements are excluded from Section 179. | Land is not depreciable; eligible land improvements may use MACRS and potentially bonus depreciation. |
| Appliances and furniture | Potentially eligible tangible personal property, but the trade-or-business and noncorporate-lessor gates still apply. | De minimis safe harbor, regular MACRS, or bonus depreciation if each provision's requirements are met. |
| Roof or HVAC on a residential rental | Not qualified Section 179 real property because that category is limited to eligible improvements to nonresidential real property. | Capitalize and depreciate under the applicable residential building or improvement rules. |
| Roof, HVAC, fire, alarm, or security improvement on nonresidential property | May be qualified Section 179 real property if placed in service after the building and all other requirements are satisfied. | Regular 39-year depreciation when the election or eligibility tests are not met. |
| Vehicle used to manage rentals | Potentially eligible only with more than 50% qualified business use and adequate records; investment use alone does not satisfy the Section 179 business-use test. | Standard mileage or regular depreciation, depending on elections, vehicle type, and substantiation. |
The noncorporate-lessor test most rental articles miss
A corporation is not subject to Section 179(d)(5)'s noncorporate-lessor restriction. An individual, partnership, or other noncorporate owner that purchases property and leases it to others generally must fit one of the exceptions. The owner may qualify if it manufactured or produced the property. For purchased property, the lease term, including renewal options, must be less than 50% of the property's class life, and allowable business deductions for the first 12 months after transfer to the lessee, excluding rent and reimbursed amounts, must exceed 15% of the rental income from that property.
Do not assume nightly Airbnb occupancy automatically satisfies a “short lease” theory. Determine who the federal tax lessor and lessee are, whether the furnishing is actually leased, which agreements must be aggregated, and how the 15% calculation applies. Entity labels and a Schedule C or Schedule E line do not replace that analysis.
Residential, short-term, and commercial rentals are not interchangeable
- Long-term residential rental: first establish that the activity is an actively conducted trade or business for Section 179, then test the leased-property restriction. The home itself and residential roof or HVAC do not qualify.
- Short-term rental: frequent guest turnover and services can support business facts, and current law can include certain tangible personal property used to furnish lodging. Neither an average stay under seven days nor material participation automatically proves Section 179 eligibility.
- Commercial rental: eligible tangible personal property may qualify, and specified post-building improvements to nonresidential real property can be qualified real property. The trade-or-business, lessor, income, and election requirements remain.
- Corporately owned rental: the noncorporate-lessor restriction may not apply, but ownership form does not make the building, land, or an otherwise excluded asset eligible.
Worked example: appliances in an individually owned rental
An individual who manages a long-term rental buys $18,000 of appliances and furniture and places them in service in June. The activity may rise to a trade or business, but the owner is also a noncorporate lessor. Before electing Section 179, the return preparer must test the lease term against each asset's class life and compute the first-12-month 15% expense-to-rent test. If that exception is not satisfied, Section 179 is unavailable even though the assets are tangible personal property. Regular MACRS or eligible bonus depreciation may still apply, and passive-loss rules can still suspend the resulting deduction.
Worked example: a roof on a mixed-use building
An owner replaces a $140,000 roof on a building containing ground-floor retail and upstairs apartments. The rule for qualified Section 179 real property is tied to nonresidential real property, so the building's tax classification and the scope of the roof project must be determined before choosing the election. Calling the property “commercial” in a loan package is not enough. If the building is residential rental property under Section 168(e), the special Section 179 roof category does not apply.
Six gates before the election appears on Form 4562
- Classify the activity: document why the rental is, or is not, an actively conducted trade or business for Section 179 purposes.
- Classify the asset: separate land, building, structural components, land improvements, tangible personal property, listed property, and qualified nonresidential improvements.
- Identify the owner and user: reconcile the taxpayer, disregarded entity, partnership, corporation, property manager, and actual occupant.
- Test leased-property restrictions: apply the noncorporate-lessor exception using the contracts, class life, first-12-month deductions, and rental income.
- Apply the limits: calculate eligible basis, business-use percentage, annual investment phaseout, taxable income, and any carryforward.
- Model the return: compare Section 179, bonus, and MACRS after basis, at-risk, passive-loss, excess-business-loss, QBI, state, recapture, and expected sale effects.
Documents to gather
- Purchase invoices, asset descriptions, installation costs, placed-in-service dates, and photographs.
- Deed, entity records, leases or guest agreements, renewal options, and property-management contracts.
- First-12-month rental income and asset-level business deductions needed for the noncorporate-lessor calculation.
- Business and personal-use logs for vehicles or other mixed-use listed property.
- Prior Forms 4562, depreciation schedules, Section 179 carryforwards, bonus elections, and state depreciation adjustments.
- Participation records, basis and at-risk schedules, and forecasts showing whether an allowed deduction is currently usable.
The 2026 Section 179 Limits
The OBBBA substantially increased Section 179. For tax years beginning after December 31, 2024, the expensing cap rose to $2.5 million with a phase-out threshold of $4 million, both indexed for inflation. For 2026 the indexed figures are approximately $2.56 million and $4.09 million, and you should confirm the exact published amounts before filing.
The phase-out works dollar for dollar. If total qualifying property placed in service during the year exceeds the threshold, the maximum Section 179 deduction is reduced by the excess, reaching zero once purchases exceed the threshold by the amount of the cap.
Section 179 is also limited to taxable income from the active conduct of a trade or business. It cannot create a loss and it cannot increase one. Any disallowed amount carries forward indefinitely, but it sits there until you have income to absorb it.
The Four Differences That Actually Decide It
1. Loss creation. Bonus depreciation can create or increase a tax loss; Section 179 cannot exceed the taxable-income limit. That does not mean a bonus deduction automatically creates a usable net operating loss or offsets other income. Basis, at-risk, passive-activity, excess-business-loss, and NOL rules apply after depreciation is computed.
2. Election granularity. Section 179 is elected asset by asset, and you can even elect a partial amount on a single asset. Bonus depreciation is all-or-nothing by class life for the year. If you want to expense one piece of equipment and depreciate another of the same class life normally, only Section 179 gives you that control.
3. State conformity. This is the most underrated factor. Many states decouple from federal bonus depreciation entirely, requiring an addback and a separate state depreciation schedule, while conforming to Section 179 at some level. In a decoupling state, using Section 179 can produce a state deduction that bonus depreciation would not, and the state tax difference can exceed the federal timing difference.
4. Property eligibility. Section 179 covers some things bonus does not, notably certain improvements to nonresidential real property placed in service after the building was first placed in service: roofs, HVAC, fire protection and alarm systems, and security systems. These are 39-year property, so they are not bonus-eligible, but they can be expensed under Section 179. For a commercial owner replacing a roof, that distinction is the entire deduction.
Recapture Rules Differ Too
If business use of Section 179 property drops to 50% or less before the end of its recovery period, you must recapture the excess deduction as ordinary income in that year, computed as the Section 179 amount taken minus the depreciation that would have been allowed. Bonus depreciation has no equivalent business-use recapture rule, though listed property rules can still apply.
On disposition, recapture depends on the asset. Furniture, equipment, and many cost-segregated components are generally Section 1245 property, while qualifying roofs and other building improvements can remain Section 1250 property. The amount and character of gain require the asset-level depreciation and sale allocation; the answer is not identical for every Section 179 and bonus asset.
This makes Section 179 riskier for assets whose business use might decline, particularly vehicles and equipment that could shift to personal or mixed use.
Vehicles: Where Both Provisions Get Complicated
Passenger automobiles are subject to the luxury auto limitations of Section 280F, which cap total first-year depreciation including bonus at an inflation-adjusted amount that is far below the vehicle's cost. Section 179 does not escape these caps for passenger autos.
The well-known exception is a vehicle with a gross vehicle weight rating above 6,000 pounds, which falls outside the passenger automobile definition. SUVs above that weight are subject to a separate Section 179 cap, indexed annually, while bonus depreciation on them is not similarly capped. Vehicles above 6,000 pounds GVWR that are not SUVs, such as certain pickups with a bed of at least six feet, avoid the SUV cap as well.
In all cases, business use must exceed 50% for accelerated methods, and mileage logs are the evidence. This is one of the most frequently examined items on a small business return, and reconstructed logs do not hold up.
The Ordering Rule and How We Usually Apply It
The statutory ordering is fixed: Section 179 first, then bonus depreciation on remaining basis, then regular MACRS. You cannot reverse it.
Our general approach is to reserve Section 179 for the things bonus cannot reach, principally qualifying nonresidential building improvements such as roofs and HVAC, and to use it in states that decouple from bonus. Then we apply bonus depreciation to everything else, since it is uncapped and can create the loss that drives the plan.
There is one more consideration that cuts against maximizing either: the Section 199A qualified business income deduction. Large first-year deductions reduce QBI, and for taxpayers inside the phase-in range the marginal effect can be counterintuitive. We model the QBI outcome before finalizing the depreciation elections, not after.
Choosing Between Them: A Short Decision Path
Do you need depreciation to create a tax loss? Section 179 cannot exceed its taxable-income limit; bonus depreciation may create the loss, but separate rules determine whether it can offset other income now.
Are you deducting a roof, HVAC unit, fire protection, or security system on a nonresidential building? Test qualified-real-property treatment under Section 179. The election is not automatic and does not extend to the same improvements on residential rental property.
Does your state decouple from bonus depreciation? Lean toward Section 179 to the extent the state conforms, and compute the combined federal and state result rather than the federal result alone.
Do you want asset-level control, expensing some items and depreciating others in the same class? Use Section 179, because the bonus election is made by class.
Is total spending near the phase-out threshold? Section 179 begins disappearing, and bonus depreciation becomes the only meaningful option.
Key Takeaways
- Both provisions can front-load all eligible basis in 2026, but Section 179's dollar, business-income, business-use, and lessor restrictions make “100%” an incomplete answer.
- Section 179 may expense eligible roofs, HVAC, fire protection, and security systems on nonresidential buildings when every qualified-real-property requirement is met.
- Bonus depreciation can create a tax loss; separate return-level rules determine whether that loss is currently usable.
- State decoupling from bonus depreciation frequently makes Section 179 the better combined-tax answer.
- Section 179 first, then bonus, then MACRS is a statutory ordering you cannot rearrange.
Frequently Asked Questions
Can you take Section 179 on rental property?
Sometimes, but not for the rental building or land and not merely because an item is used in a rental. The asset must be eligible Section 179 property acquired for the active conduct of a trade or business, and a noncorporate owner that leases property to others must satisfy the special lessor exception. Residential and short-term rental owners must also test business use, taxable income, placed-in-service timing, passive-loss limits, and whether bonus depreciation or regular MACRS is the proper alternative.
What is the Section 179 limit for 2026?
The OBBBA raised the cap to $2.5 million with a $4 million phase-out threshold for tax years beginning after December 31, 2024, both indexed for inflation. For 2026 the indexed amounts are approximately $2.56 million and $4.09 million. Confirm the published figures before filing, since they adjust annually.
Can Section 179 create a net operating loss?
No. Section 179 is limited to taxable income from the active conduct of a trade or business and cannot create or increase a loss. A disallowed amount may carry forward, subject to the applicable rules. Bonus depreciation can create a tax loss, but basis, at-risk, passive-activity, excess-business-loss, and other rules still determine whether that loss is currently usable.
Which is better for a new roof on a commercial building?
Section 179 may apply when the roof is an eligible improvement to nonresidential real property and every trade-or-business, placed-in-service, election, taxable-income, and dollar-limit requirement is met. The same qualified-real-property category can include eligible HVAC, fire-protection, alarm, and security systems. A roof on residential rental property does not qualify under this nonresidential category.
Do states treat Section 179 and bonus depreciation the same?
Often not. Many states decouple from federal bonus depreciation and require an addback with a separate state depreciation schedule, while conforming to Section 179 at some level, sometimes with a lower cap. In those states the choice between the two provisions can change your state tax materially.
What happens if business use of Section 179 property drops below 50%?
Section 179 recapture can apply when business use falls to 50% or less, measured against the depreciation that otherwise would have been allowed. Bonus depreciation does not use the same Section 179 recapture formula, but listed-property and other recapture rules can still apply, and gain on disposition depends on whether the asset is Section 1245 or Section 1250 property.
Related Reading
Talk Through Your Situation
Every situation turns on its own facts. Schedule a discovery call and we will walk through what applies to you, what it is worth, and what it would take to put it in place.
Compare eligibility and limits before choosing a deduction
Section 179 and bonus depreciation have different requirements. Section 179 involves trade-or-business use, taxable-income limits and restrictions relevant to leasing arrangements. Bonus depreciation has its own acquisition, asset and election rules. A taxpayer cannot assume that a rental asset qualifies for Section 179 just because its recovery period is short.
Illustrative decision
An owner expects to expense furniture under Section 179 while reporting limited business income. The preparer should review eligibility and the income limitation, then compare any available bonus or regular depreciation treatment. The largest advertised statutory limit is not the owner's allowable deduction.
Records and decisions to prepare
- Identify who owns and leases the asset
- Confirm business-use requirements
- Review Section 179 income and other limits
- Evaluate bonus eligibility independently
- Compare federal and state schedules
Primary references for this decision:
Examples illustrate decisions, not guaranteed outcomes. Apply the rules for the relevant tax year and review the underlying facts before filing.
Property basis and sales · Browse owner tax decisions · Editorial standards