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Can You Take Section 179 on Leasehold Improvements?
Yes, you can take a Section 179 deduction on leasehold improvements, provided the work qualifies as qualified improvement property (QIP): an improvement to the interior of a nonresidential building, placed in service after the building was first placed in service by anyone, and used in the active conduct of a trade or business. Interior build-out work such as flooring, lighting, interior partitions, ceilings, plumbing, and electrical upgrades qualifies. Enlargements of the building, elevators, escalators, and changes to the internal structural framework do not. Two limits govern how much of the improvement you can expense in year one: the 2026 dollar cap of $2,560,000 under Revenue Procedure 2025-32, and the business income limitation in IRC Section 179(b)(3), which prevents the deduction from creating a net loss.
The sections below cover what leasehold improvements are, what qualified improvement property means and where its boundaries sit, which improvements are excluded from Section 179 entirely, how long leasehold improvements are depreciated when they are not expensed, how Section 179 and 100% bonus depreciation interact after the One Big Beautiful Bill Act, what happens in a loss year, whether the landlord or the tenant claims the deduction, how leases and rental property are treated under the active trade or business test, how the election is made on Form 4562, how often Section 179 can be used, when declining the election produces a better result, and what happens to the remaining basis when a lease ends early.
Key Takeaways
- Leasehold improvements qualify for Section 179 when they meet the definition of qualified improvement property (QIP) under IRC Section 168(e)(6): interior work on a nonresidential building, placed in service after the building was first placed in service.
- The 2026 Section 179 deduction limit is $2,560,000, with the dollar-for-dollar phase-out beginning at $4,090,000 of qualifying property and reaching zero at $6,650,000, per Revenue Procedure 2025-32.
- QIP carries a 15-year recovery period instead of the 39-year life that applies to the nonresidential building structure itself.
- Enlargements, elevators, escalators, and modifications to the internal structural framework are excluded from QIP by statute, regardless of who pays for them.
- Roofs, HVAC systems, fire protection systems, alarm systems, and security systems on nonresidential buildings qualify for Section 179 under the IRC Section 179(f) carve-out, even though they sit outside the QIP definition.
- Section 179 cannot create or increase a net operating loss. The disallowed amount carries forward indefinitely under IRC Section 179(b)(3).
- 100% bonus depreciation is permanent for qualifying property acquired after January 19, 2025, under the One Big Beautiful Bill Act, and it has no dollar cap and no business income limitation.
- Whoever pays for and owns the improvement claims the deduction. A landlord-funded tenant improvement allowance generally puts the depreciable basis on the landlord's books, not the tenant's.
- Recapture applies when business use of the improvement drops to 50% or less before the end of the recovery period.
Can You Take Section 179 on Leasehold Improvements?
You can take Section 179 on leasehold improvements when the improvement meets four conditions: the building is nonresidential, the work is interior, the improvement is placed in service after the building was first placed in service, and the property is used in the active conduct of a trade or business. Those four conditions come directly from IRC Section 179(d)(1) and IRC Section 168(e)(6), and all four have to hold at once. An interior renovation in a residential rental building fails the first condition. A build-out completed as part of original construction fails the third.
The active conduct of a trade or business condition is the one that catches the most filers by surprise. IRS Publication 946 limits Section 179 to property acquired for use in a trade or business, which excludes property held only for the production of income. A commercial landlord who runs leasing as an active business satisfies the test. An investor who holds a single passive property and collects rent generally does not.
The dollar limits arrive after eligibility is settled. For tax years beginning in 2026, Revenue Procedure 2025-32 sets the maximum Section 179 deduction at $2,560,000, with the phase-out starting at $4,090,000 of total qualifying property placed in service during the year. A tenant spending $400,000 on a restaurant build-out sits well below both figures, which means the practical constraint for most build-outs is the business income limitation rather than the dollar cap. Getting the classification right before the first invoice is paid is what separates a full first-year write-off from a 15-year recovery schedule.
What Are Leasehold Improvements?
Leasehold improvements are permanent modifications made to a leased commercial space to fit the needs of the tenant occupying it, including flooring, interior lighting, HVAC distribution, interior partitions and walls, ceilings, plumbing rough-ins, electrical upgrades, built-in casework, and accessibility features. These modifications attach to the building rather than to the tenant, which is what separates a leasehold improvement from furniture, equipment, or removable fixtures that travel with the business when the lease ends.
The attachment to the building is also what drives the tax treatment. Removable business personal property such as desks, appliances, and equipment is Section 1245 property with a 5-year or 7-year recovery period. Leasehold improvements are Section 1250 real property, which under the pre-2018 rules meant a 39-year write-off stretched across a lease term that often ran ten years or less. Congress addressed that mismatch by creating a shorter-lived category for interior improvement work, and that category is where leasehold improvements now sit.
The category has changed names. From 2001 through 2017, the Internal Revenue Code recognized qualified leasehold improvement property (QLIP), which required the improvement to be made under or pursuant to a lease and to be placed in service more than three years after the building was first placed in service, according to the Congressional Research Service summary of the American Jobs Creation Act. The Tax Cuts and Jobs Act replaced QLIP with qualified improvement property, dropped the lease requirement entirely, and dropped the three-year waiting period. A tenant improvement today reaches the same favorable treatment without the lease-specific conditions that governed the old category, and mapping each line item of a build-out to the right category early is the part of tax planning that determines the size of the year-one deduction.
What Qualifies as Qualified Improvement Property?
Qualified improvement property is any improvement made by the taxpayer to an interior portion of a building that is nonresidential real property, placed in service after the date the building was first placed in service. That definition sits in IRC Section 168(e)(6), and it is deliberately broad. The improvement does not have to be made under a lease. It does not have to wait three years after the building opens. It does not have to be made by a tenant.
The breadth of the QIP definition is what makes it the primary path for leasehold improvement deductions. A medical office converting exam rooms, a restaurant rebuilding a kitchen line, a retail tenant installing new interior storefront glazing, and an agency reconfiguring an open-plan floor all produce QIP. Each of those projects generates a mix of components, and separating the components accurately is where a cost segregation study earns its cost, because a single construction invoice often contains 5-year personal property, 15-year QIP, and 39-year structural work billed as one number.
What Improvements Do Not Qualify as QIP?
Four categories of improvement are excluded from qualified improvement property by statute, regardless of who pays for the work or how the lease is written. IRC Section 168(e)(6)(B) names three of them, and the interior requirement supplies the fourth:
- Enlargement of the building. Adding square footage, extending a wall outward, or building out an addition is excluded even when the new space is interior once complete.
- Elevators and escalators. Installation or replacement of either system is excluded by name.
- Internal structural framework. Load-bearing columns, beams, girders, trusses, and foundation work are excluded, which means a build-out that moves a structural column has a portion that cannot reach QIP treatment.
- Exterior work. Parking lots, sidewalks, landscaping, exterior lighting, and fencing are land improvements rather than interior improvements, and they are excluded from Section 179 entirely.
Each excluded item still depreciates, just on a longer schedule and through a different provision. Structural framework work and building enlargements follow the 39-year nonresidential schedule. Land improvements follow a 15-year schedule and reach a full first-year deduction through bonus depreciation rather than Section 179. The exclusion changes which provision produces the deduction, not whether a deduction exists.
Can You Take Section 179 on a Roof or HVAC System?
Yes, you can take Section 179 on a roof, an HVAC system, a fire protection system, an alarm system, or a security system installed on a nonresidential building, even though none of those items meets the QIP definition. IRC Section 179(f), added by the Tax Cuts and Jobs Act in 2017, extends Section 179 eligibility to those five categories by name. The improvement must be placed in service after the building was first placed in service, and the building must be nonresidential.
The Section 179(f) carve-out matters most for tenants and landlords doing full-system replacements. A rooftop HVAC unit serving a leased suite is a structural component of the building with a 39-year recovery period, which puts it outside bonus depreciation because bonus depreciation reaches only property with a recovery period of 20 years or less. Section 179 is therefore the only route to a first-year write-off on that unit. Separating the HVAC distribution ductwork inside the tenant space, which is QIP, from the rooftop unit itself, which is a 179(f) carve-out item, produces two different deduction paths on one construction contract.
What Is Not Eligible for Section 179?
Property not eligible for Section 179 includes land, land improvements, the building structure itself (residential and nonresidential), residential rental property of every kind, property with a recovery period longer than 20 years outside the Section 179(f) carve-outs, property used 50% or less for business, property acquired from a related party, property acquired by gift or inheritance, and property used predominantly outside the United States. The related-party exclusion in IRC Section 179(d)(2) reaches further than most filers expect, and it disallows the election when a tenant buys out improvements from an entity under common control.
Residential rental property deserves its own note, because apartment build-outs are a frequent source of confusion. QIP applies only to nonresidential real property, which means an interior renovation inside an apartment unit does not qualify as QIP and does not qualify for Section 179. The same renovation inside a ground-floor commercial suite in the same building does qualify, since that portion of the building is nonresidential. Mixed-use buildings therefore require the improvement cost to be allocated between the residential and nonresidential portions before any election is made.
How Long Do You Depreciate Leasehold Improvements?
Leasehold improvements that meet the QIP definition are depreciated over 15 years using the straight-line method and the half-year convention, and improvements that fall outside QIP are depreciated over 39 years as nonresidential real property. The 15-year recovery period comes from IRC Section 168(e)(6) as corrected by the CARES Act, which fixed a drafting error in the Tax Cuts and Jobs Act that had left QIP stranded at 39 years from 2018 through early 2020.
The 15-year classification does two things at once. It shortens the schedule for any portion of the improvement that is not expensed in year one, and it brings QIP under the 20-year ceiling that bonus depreciation requires. That second effect is what makes a build-out eligible for a full first-year write-off through either Section 179 or bonus depreciation. The 2025 rule change under the One Big Beautiful Bill Act, signed into law on July 4, 2025, restored the 100% bonus rate permanently for qualifying property acquired after January 19, 2025.
The lease term has no effect on the recovery period. A tenant with a seven-year lease still depreciates unexpensed QIP over 15 years, because the recovery period is set by the property's statutory classification rather than by the length of the occupancy. That mismatch between a 15-year schedule and a shorter lease is exactly why a first-year election matters so much for tenants, and it is also why the disposition rules at the end of a lease carry real dollars.
Can You Take 179 and Bonus Depreciation on the Same Asset?
You can apply both Section 179 and bonus depreciation to the same asset, but not to the same dollars. The ordering is fixed: Section 179 is applied first, the elected amount reduces the asset's basis, and 100% bonus depreciation then applies to whatever basis remains. A $500,000 build-out with a $200,000 Section 179 election leaves $300,000 of basis, and bonus depreciation absorbs that $300,000 in the same year.
The two provisions differ on nearly every constraint that matters, and the differences decide which one a tenant should lead with. The comparison below reflects the 2026 figures published in Revenue Procedure 2025-32 and the permanent bonus rate established by the One Big Beautiful Bill Act.
AttributeSection 179100% Bonus Depreciation2026 dollar cap$2,560,000No capSpending phase-outBegins at $4,090,000; zero at $6,650,000NoneBusiness income limitationYes, capped at taxable business incomeNoCan create a net operating lossNoYesElection granularityPer asset, and a partial amount may be electedApplies automatically to an entire asset class unless elected outDisallowed amountCarries forward indefinitelyNot applicableApplies to roofs and HVAC (39-year)Yes, under the 179(f) carve-outNo, recovery period exceeds 20 yearsState conformityBroad, though several states cap the amountNarrower, many states decouple entirely
Election granularity is the attribute that most often decides the answer. Section 179 can be elected on one asset and skipped on another, and it can be elected for a partial amount on a single asset. Bonus depreciation is an all-or-nothing choice made at the asset class level, which means electing out of bonus for the 15-year class removes it from every 15-year asset placed in service that year. A tenant who wants to expense the build-out but preserve depreciation on a separate 15-year asset needs Section 179 to do the surgical work, and that flexibility is what makes the business income limitation worth planning around rather than avoiding. Applying the elections in the right order is a core part of tax strategy in any year with significant capital spending.
Can You Take Section 179 If You Have a Loss?
You cannot take a Section 179 deduction that creates or increases a loss, because IRC Section 179(b)(3) caps the deduction at your aggregate taxable income from the active conduct of any trade or business during the year. The amount disallowed by that cap is not lost. It carries forward indefinitely and becomes available in the first future year with enough business income to absorb it.
Business income for this purpose is broader than net profit from the single activity. It includes W-2 wages earned by the taxpayer, income from other active businesses, and, on a joint return, the spouse's earned income. A consultant with $40,000 of net business profit and $150,000 of W-2 wages has $190,000 of business income available to absorb a Section 179 election, which is a figure many filers underestimate when they assume the build-out cannot be expensed.
Bonus depreciation is the answer when the business income simply is not there. A tenant who completes a $350,000 build-out in a startup year with $60,000 of business income can elect $60,000 under Section 179, carry the rest forward, or take 100% bonus depreciation on the full $350,000 and generate a net operating loss that offsets future income. The better path depends on projected income across the next three to five years and on the marginal rate expected in each of them, which is the kind of multi-year modeling our Virtual CFO engagements run before a construction contract is signed.
Who Claims the Deduction, the Landlord or the Tenant?
The party that pays for the improvement and owns it claims the depreciation deduction, which is the tenant when the tenant funds the build-out directly and the landlord when the landlord funds it through a construction allowance. Ownership follows the money and the lease language together, and a lease that assigns ownership of the improvements to the landlord on completion can shift the depreciable basis even when the tenant wrote the checks.
Tenant improvement allowances are where the analysis gets specific. A landlord who pays a construction allowance and retains ownership of the resulting improvements capitalizes the cost and depreciates it, and the tenant excludes the allowance from gross income under IRC Section 110 when the lease is a short-term lease of retail space and the allowance is used for qualified construction. An allowance that falls outside Section 110 is generally taxable income to the tenant, and the tenant then capitalizes and depreciates the improvements it funded. Two economically similar deals can therefore produce opposite tax outcomes based on lease drafting alone.
We raise this with commercial tenants in Miami before the lease is executed rather than after, because the allowance structure is negotiable while the tax treatment of a signed lease is not. The same conversation covers who owns the improvements at expiration, whether the tenant is obligated to restore the space, and how the allowance is documented. Those three points determine the depreciation answer for both parties, and pulling them forward into the negotiation is one of the more concrete places business consulting work changes a financial outcome.
Does Section 179 Work for Leases?
Section 179 works for leased space, because the current QIP rules contain no lease requirement at all. The improvement must be interior, nonresidential, and placed in service after the building opened. Whether the taxpayer owns the building, leases it, or subleases it does not affect QIP eligibility, which is the single largest simplification the Tax Cuts and Jobs Act delivered in this area.
Lease payments themselves follow a separate rule. Rent paid for business space is an ordinary and necessary business expense deductible in full in the year paid or accrued under IRC Section 162, and it is never capitalized or depreciated. The distinction is between occupancy cost, which is expensed, and improvement cost, which is capitalized and then expensed through an election. A restaurant paying $8,000 a month in rent deducts $96,000 of rent for the year and separately treats the $300,000 kitchen build-out as QIP, and that split is one of the recurring adjustments we make in restaurant accounting files where construction costs were coded to rent expense.
Repairs sit on the same boundary and get misclassified just as often. Routine maintenance, painting, patching, and fixture replacement that keeps the space in ordinary operating condition is a current deduction rather than a capitalized improvement. Work that betters the property, restores it, or adapts it to a new use is capitalized under the tangible property regulations in Treasury Regulation Section 1.263(a)-3. The de minimis safe harbor in those same regulations allows items below a set per-invoice threshold to be expensed outright, which removes small fixtures from the capitalization analysis entirely.
Can You Take a Section 179 Deduction on Rental Property?
You can take a Section 179 deduction on rental property only when the rental activity rises to the level of an active trade or business, and only on the nonresidential portion of that property. Property acquired solely for the production of income does not qualify under IRC Section 179(d)(1), and property that generates royalties is excluded on the same ground.
The active trade or business threshold turns on the scope and regularity of the activity rather than on a single bright line. A commercial landlord managing multiple tenants, negotiating leases, handling build-outs, and arranging maintenance is conducting an active business. An investor holding a single net-leased property with no operational involvement generally is not. Qualified improvement property, qualified restaurant property, and qualified retail improvement property can support a Section 179 deduction on a property reported on Schedule E, as long as the lessor treats the rental as an active trade or business.
Residential rental property is excluded regardless of how active the landlord is, since QIP reaches nonresidential buildings only. A landlord who owns both a strip center and an apartment building can elect Section 179 on the strip center interior work and cannot elect it on the apartment interiors, in the same tax year, on the same return. Keeping those activities cleanly separated in the books is what makes the position defensible, and accurate financial statements are where that separation starts.
How Do You Claim Section 179 on Form 4562?
You claim Section 179 by completing Part I of Form 4562, Depreciation and Amortization, and attaching it to a timely filed return for the year the improvement is placed in service. The election is made asset by asset and amount by amount, and Treasury Regulation Section 1.179-5 governs how it is made and revoked. The sequence runs as follows:
- Enter the maximum dollar limit on line 1. For 2026 that figure is $2,560,000.
- Enter the total cost of all Section 179 property placed in service on line 2. This includes the qualifying build-out costs plus equipment, furniture, and any other qualifying assets from the same year.
- Enter the phase-out threshold on line 3. For 2026 that figure is $4,090,000, and line 4 captures the excess of line 2 over line 3.
- Calculate the reduced dollar limit on line 5 by subtracting the line 4 phase-out from the line 1 maximum.
- List each elected asset on line 6 with its description, total cost, and the specific amount being elected, which can be less than the full cost.
- Apply the business income limitation on line 11 and carry any disallowed amount forward on line 13.
Line 6 is where the per-asset flexibility becomes real. Electing $180,000 on a $300,000 build-out leaves $120,000 of basis that either takes 100% bonus depreciation or depreciates over 15 years, and that split is the lever used to land taxable income exactly where the plan calls for it. Running the election against a projected return rather than a completed one is the difference between a deduction that fits the year and one that spills into a carryforward, which is the reason proactive tax planning happens before December 31 rather than in April.
How Many Times Can You Use Section 179?
You can use Section 179 every year, with no lifetime cap and no limit on the number of times the election is made, because the deduction resets annually. Each tax year brings a fresh dollar limit, a fresh phase-out threshold, and a fresh business income limitation. A business that elects $400,000 in 2025 can elect up to the full $2,560,000 in 2026, subject to that year's spending and income figures.
The annual reset applies per taxpayer rather than per asset or per location. A company with three leased locations placing $600,000 of qualifying improvements in service across all three in one year measures the $2,560,000 limit against the combined $600,000, not against each location separately. Partnerships and S corporations add a second layer, because IRC Section 179(d)(8) applies the limit at both the entity level and the partner or shareholder level, which means an owner with interests in several pass-through entities can hit the ceiling on the personal return even when no single entity comes close.
Multi-entity structures are where that second layer produces surprises. An owner of four operating entities, each electing $700,000, receives $2,800,000 of allocated Section 179 and can deduct only $2,560,000 personally in 2026. Modeling the allocation across entities before the elections are filed keeps the excess from becoming an unplanned carryforward, and it is a recurring item for startup and tech clients operating through multiple entities.
When Should You Not Use the Section 179 Deduction?
Declining the Section 179 election produces a better result in four situations: when a lower current-year marginal rate makes future deductions more valuable, when state conformity rules create an addback, when business use of the improvement may fall below the threshold, and when 100% bonus depreciation reaches the same dollars with fewer conditions. Each situation is identifiable before the return is filed, which is what makes the election a planning decision rather than a mechanical one.
State conformity is the most concrete of the four. Several states cap the Section 179 deduction well below the federal limit or decouple from it entirely, which forces an addback on the state return and a separate state depreciation schedule for the life of the asset. Florida has no personal income tax, so an individual owner feels none of this directly, though a multi-state business with locations outside Florida carries a state-level tracking obligation on every federal election it makes. That divergence between federal and state basis persists for 15 years on QIP and is straightforward to maintain once it is set up deliberately.
Recapture is the second situation worth planning around. Section 179 benefits are recaptured as ordinary income when business use of the property drops to 50% or less at any point before the end of the recovery period, per the Form 4562 instructions. A tenant who expenses a build-out and then converts a substantial portion of the space to personal or non-business use triggers that recapture, and the amount recaptured is the excess of the Section 179 deduction taken over the depreciation that would otherwise have been allowed. Documenting business use of the improved space from the start is what keeps the election from reversing later.
What Happens to Leasehold Improvements When the Lease Ends?
When a lease ends and the tenant abandons the improvements, the tenant deducts the remaining undepreciated basis as an abandonment loss in the year the lease terminates and the space is surrendered. That loss is deducted under IRC Section 165 and Treasury Regulation Section 1.167(a)-8, and it applies to the basis that has not already been recovered through depreciation or a first-year election.
The size of that loss depends entirely on what was elected earlier. A tenant who expensed a $300,000 build-out in full under Section 179 has zero remaining basis and therefore no abandonment loss, having already captured the deduction in year one. A tenant who depreciated the same build-out over 15 years and vacated after year seven carries roughly $160,000 of remaining basis into an abandonment loss. Both tenants deduct $300,000 in total, and the timing difference between them is worth real money in present value terms.
Lease renewals and early terminations both change the picture. Improvements abandoned at the end of an initial term that is immediately renewed are not abandoned at all, and depreciation simply continues. Improvements surrendered in an early termination generate the loss in the termination year. Returns filed in prior years without the correct classification can often be corrected through a change in accounting method rather than an amended return, which is the path we walk through with clients who already filed before the improvement analysis was done.
Frequently Asked Questions
Can You Take Section 179 on Used Property?
Yes, you can take Section 179 on used property, as long as the property is new to you and was not acquired from a related party. IRC Section 179(d)(2) disallows the election for property acquired from a spouse, an ancestor, a lineal descendant, or a controlled entity. A tenant buying out an existing build-out from an unrelated prior tenant can elect Section 179 on the purchase price allocated to qualifying interior improvements.
Do Leasehold Improvements Qualify for Bonus Depreciation?
Yes, leasehold improvements that meet the QIP definition qualify for 100% bonus depreciation, because QIP carries a 15-year recovery period and bonus depreciation reaches property with a recovery period of 20 years or less. The One Big Beautiful Bill Act made the 100% rate permanent for qualifying property acquired after January 19, 2025. Under the original Tax Cuts and Jobs Act phase-down, the rate would have dropped to 20% in 2026.
Is There a Minimum Lease Term for Leasehold Improvements to Qualify?
No, there is no minimum lease term for leasehold improvements to qualify as QIP. The pre-2018 qualified leasehold improvement property rules required the improvement to be placed in service more than three years after the building was first placed in service, and the Tax Cuts and Jobs Act eliminated that requirement along with the lease condition itself. Only the interior, nonresidential, and placed-in-service-after-the-building tests remain.
Can a Partnership or S Corporation Claim Section 179 on a Build-Out?
Yes, a partnership or S corporation can claim Section 179 on a qualifying build-out, and the limit applies twice under IRC Section 179(d)(8). The entity applies the $2,560,000 limit at the entity level for 2026, allocates the elected amount to partners or shareholders on Schedule K-1, and each owner then applies the same limit again on the personal return across all sources. The business income limitation is likewise tested at both levels.
Does Section 179 Apply to Repairs and Maintenance?
No, Section 179 does not apply to repairs and maintenance, because repair costs are deducted in full in the year incurred rather than capitalized. Treasury Regulation Section 1.263(a)-3 separates deductible repairs from capitalized improvements based on whether the work betters, restores, or adapts the property to a new use. Painting a leased suite is a repair. Replacing the electrical distribution in that suite is an improvement.
Can You Amend a Prior Return to Claim Section 179 on Leasehold Improvements?
Yes, a prior return can be corrected, though the mechanism depends on what changed. A missed Section 179 election is generally corrected on an amended return filed within the statutory period, while a misclassified depreciation method is corrected through Form 3115 as a change in accounting method, which allows the cumulative adjustment to be taken in the current year. The Form 3115 route avoids amending multiple years and is the more common path when a build-out was placed on a 39-year schedule that should have been 15.
The Bottom Line
Section 179 reaches leasehold improvements whenever the work qualifies as qualified improvement property, which covers most interior build-out spending on nonresidential space placed in service after the building opened. The exclusions are narrow and specific: enlargements, elevators, escalators, internal structural framework, exterior work, and residential space. The real constraints on the deduction are rarely eligibility. They are the business income limitation, the interaction with 100% bonus depreciation, the question of which party owns the improvements, and the state-level conformity rules that follow the asset for 15 years.
Those decisions are made once, at the moment the return is filed, and they set the depreciation path for the remaining life of the improvement. Sorting the construction invoice into the right categories, choosing between Section 179 and bonus depreciation with the next few years in view, and getting the lease language right before signing are what turn a build-out into the deduction it should be. If you are planning a commercial build-out or have already completed one and want the classification reviewed, the advisors at NR CPAs & Business Advisors are glad to look at the details with you, and you can reach us at +1 954-231-6613.
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Tax and Financial Insights
by NR CPAs & Business Advisors
Can You Take Section 179 on Leasehold Improvements?
Yes, you can take a Section 179 deduction on leasehold improvements, provided the work qualifies as qualified improvement property (QIP): an improvement to the interior of a nonresidential building, placed in service after the building was first placed in service by anyone, and used in the active conduct of a trade or business. Interior build-out work such as flooring, lighting, interior partitions, ceilings, plumbing, and electrical upgrades qualifies. Enlargements of the building, elevators, escalators, and changes to the internal structural framework do not. Two limits govern how much of the improvement you can expense in year one: the 2026 dollar cap of $2,560,000 under Revenue Procedure 2025-32, and the business income limitation in IRC Section 179(b)(3), which prevents the deduction from creating a net loss.
The sections below cover what leasehold improvements are, what qualified improvement property means and where its boundaries sit, which improvements are excluded from Section 179 entirely, how long leasehold improvements are depreciated when they are not expensed, how Section 179 and 100% bonus depreciation interact after the One Big Beautiful Bill Act, what happens in a loss year, whether the landlord or the tenant claims the deduction, how leases and rental property are treated under the active trade or business test, how the election is made on Form 4562, how often Section 179 can be used, when declining the election produces a better result, and what happens to the remaining basis when a lease ends early.
Key Takeaways
- Leasehold improvements qualify for Section 179 when they meet the definition of qualified improvement property (QIP) under IRC Section 168(e)(6): interior work on a nonresidential building, placed in service after the building was first placed in service.
- The 2026 Section 179 deduction limit is $2,560,000, with the dollar-for-dollar phase-out beginning at $4,090,000 of qualifying property and reaching zero at $6,650,000, per Revenue Procedure 2025-32.
- QIP carries a 15-year recovery period instead of the 39-year life that applies to the nonresidential building structure itself.
- Enlargements, elevators, escalators, and modifications to the internal structural framework are excluded from QIP by statute, regardless of who pays for them.
- Roofs, HVAC systems, fire protection systems, alarm systems, and security systems on nonresidential buildings qualify for Section 179 under the IRC Section 179(f) carve-out, even though they sit outside the QIP definition.
- Section 179 cannot create or increase a net operating loss. The disallowed amount carries forward indefinitely under IRC Section 179(b)(3).
- 100% bonus depreciation is permanent for qualifying property acquired after January 19, 2025, under the One Big Beautiful Bill Act, and it has no dollar cap and no business income limitation.
- Whoever pays for and owns the improvement claims the deduction. A landlord-funded tenant improvement allowance generally puts the depreciable basis on the landlord's books, not the tenant's.
- Recapture applies when business use of the improvement drops to 50% or less before the end of the recovery period.
Can You Take Section 179 on Leasehold Improvements?
You can take Section 179 on leasehold improvements when the improvement meets four conditions: the building is nonresidential, the work is interior, the improvement is placed in service after the building was first placed in service, and the property is used in the active conduct of a trade or business. Those four conditions come directly from IRC Section 179(d)(1) and IRC Section 168(e)(6), and all four have to hold at once. An interior renovation in a residential rental building fails the first condition. A build-out completed as part of original construction fails the third.
The active conduct of a trade or business condition is the one that catches the most filers by surprise. IRS Publication 946 limits Section 179 to property acquired for use in a trade or business, which excludes property held only for the production of income. A commercial landlord who runs leasing as an active business satisfies the test. An investor who holds a single passive property and collects rent generally does not.
The dollar limits arrive after eligibility is settled. For tax years beginning in 2026, Revenue Procedure 2025-32 sets the maximum Section 179 deduction at $2,560,000, with the phase-out starting at $4,090,000 of total qualifying property placed in service during the year. A tenant spending $400,000 on a restaurant build-out sits well below both figures, which means the practical constraint for most build-outs is the business income limitation rather than the dollar cap. Getting the classification right before the first invoice is paid is what separates a full first-year write-off from a 15-year recovery schedule.
What Are Leasehold Improvements?
Leasehold improvements are permanent modifications made to a leased commercial space to fit the needs of the tenant occupying it, including flooring, interior lighting, HVAC distribution, interior partitions and walls, ceilings, plumbing rough-ins, electrical upgrades, built-in casework, and accessibility features. These modifications attach to the building rather than to the tenant, which is what separates a leasehold improvement from furniture, equipment, or removable fixtures that travel with the business when the lease ends.
The attachment to the building is also what drives the tax treatment. Removable business personal property such as desks, appliances, and equipment is Section 1245 property with a 5-year or 7-year recovery period. Leasehold improvements are Section 1250 real property, which under the pre-2018 rules meant a 39-year write-off stretched across a lease term that often ran ten years or less. Congress addressed that mismatch by creating a shorter-lived category for interior improvement work, and that category is where leasehold improvements now sit.
The category has changed names. From 2001 through 2017, the Internal Revenue Code recognized qualified leasehold improvement property (QLIP), which required the improvement to be made under or pursuant to a lease and to be placed in service more than three years after the building was first placed in service, according to the Congressional Research Service summary of the American Jobs Creation Act. The Tax Cuts and Jobs Act replaced QLIP with qualified improvement property, dropped the lease requirement entirely, and dropped the three-year waiting period. A tenant improvement today reaches the same favorable treatment without the lease-specific conditions that governed the old category, and mapping each line item of a build-out to the right category early is the part of tax planning that determines the size of the year-one deduction.
What Qualifies as Qualified Improvement Property?
Qualified improvement property is any improvement made by the taxpayer to an interior portion of a building that is nonresidential real property, placed in service after the date the building was first placed in service. That definition sits in IRC Section 168(e)(6), and it is deliberately broad. The improvement does not have to be made under a lease. It does not have to wait three years after the building opens. It does not have to be made by a tenant.
The breadth of the QIP definition is what makes it the primary path for leasehold improvement deductions. A medical office converting exam rooms, a restaurant rebuilding a kitchen line, a retail tenant installing new interior storefront glazing, and an agency reconfiguring an open-plan floor all produce QIP. Each of those projects generates a mix of components, and separating the components accurately is where a cost segregation study earns its cost, because a single construction invoice often contains 5-year personal property, 15-year QIP, and 39-year structural work billed as one number.
What Improvements Do Not Qualify as QIP?
Four categories of improvement are excluded from qualified improvement property by statute, regardless of who pays for the work or how the lease is written. IRC Section 168(e)(6)(B) names three of them, and the interior requirement supplies the fourth:
- Enlargement of the building. Adding square footage, extending a wall outward, or building out an addition is excluded even when the new space is interior once complete.
- Elevators and escalators. Installation or replacement of either system is excluded by name.
- Internal structural framework. Load-bearing columns, beams, girders, trusses, and foundation work are excluded, which means a build-out that moves a structural column has a portion that cannot reach QIP treatment.
- Exterior work. Parking lots, sidewalks, landscaping, exterior lighting, and fencing are land improvements rather than interior improvements, and they are excluded from Section 179 entirely.
Each excluded item still depreciates, just on a longer schedule and through a different provision. Structural framework work and building enlargements follow the 39-year nonresidential schedule. Land improvements follow a 15-year schedule and reach a full first-year deduction through bonus depreciation rather than Section 179. The exclusion changes which provision produces the deduction, not whether a deduction exists.
Can You Take Section 179 on a Roof or HVAC System?
Yes, you can take Section 179 on a roof, an HVAC system, a fire protection system, an alarm system, or a security system installed on a nonresidential building, even though none of those items meets the QIP definition. IRC Section 179(f), added by the Tax Cuts and Jobs Act in 2017, extends Section 179 eligibility to those five categories by name. The improvement must be placed in service after the building was first placed in service, and the building must be nonresidential.
The Section 179(f) carve-out matters most for tenants and landlords doing full-system replacements. A rooftop HVAC unit serving a leased suite is a structural component of the building with a 39-year recovery period, which puts it outside bonus depreciation because bonus depreciation reaches only property with a recovery period of 20 years or less. Section 179 is therefore the only route to a first-year write-off on that unit. Separating the HVAC distribution ductwork inside the tenant space, which is QIP, from the rooftop unit itself, which is a 179(f) carve-out item, produces two different deduction paths on one construction contract.
What Is Not Eligible for Section 179?
Property not eligible for Section 179 includes land, land improvements, the building structure itself (residential and nonresidential), residential rental property of every kind, property with a recovery period longer than 20 years outside the Section 179(f) carve-outs, property used 50% or less for business, property acquired from a related party, property acquired by gift or inheritance, and property used predominantly outside the United States. The related-party exclusion in IRC Section 179(d)(2) reaches further than most filers expect, and it disallows the election when a tenant buys out improvements from an entity under common control.
Residential rental property deserves its own note, because apartment build-outs are a frequent source of confusion. QIP applies only to nonresidential real property, which means an interior renovation inside an apartment unit does not qualify as QIP and does not qualify for Section 179. The same renovation inside a ground-floor commercial suite in the same building does qualify, since that portion of the building is nonresidential. Mixed-use buildings therefore require the improvement cost to be allocated between the residential and nonresidential portions before any election is made.
How Long Do You Depreciate Leasehold Improvements?
Leasehold improvements that meet the QIP definition are depreciated over 15 years using the straight-line method and the half-year convention, and improvements that fall outside QIP are depreciated over 39 years as nonresidential real property. The 15-year recovery period comes from IRC Section 168(e)(6) as corrected by the CARES Act, which fixed a drafting error in the Tax Cuts and Jobs Act that had left QIP stranded at 39 years from 2018 through early 2020.
The 15-year classification does two things at once. It shortens the schedule for any portion of the improvement that is not expensed in year one, and it brings QIP under the 20-year ceiling that bonus depreciation requires. That second effect is what makes a build-out eligible for a full first-year write-off through either Section 179 or bonus depreciation. The 2025 rule change under the One Big Beautiful Bill Act, signed into law on July 4, 2025, restored the 100% bonus rate permanently for qualifying property acquired after January 19, 2025.
The lease term has no effect on the recovery period. A tenant with a seven-year lease still depreciates unexpensed QIP over 15 years, because the recovery period is set by the property's statutory classification rather than by the length of the occupancy. That mismatch between a 15-year schedule and a shorter lease is exactly why a first-year election matters so much for tenants, and it is also why the disposition rules at the end of a lease carry real dollars.
Can You Take 179 and Bonus Depreciation on the Same Asset?
You can apply both Section 179 and bonus depreciation to the same asset, but not to the same dollars. The ordering is fixed: Section 179 is applied first, the elected amount reduces the asset's basis, and 100% bonus depreciation then applies to whatever basis remains. A $500,000 build-out with a $200,000 Section 179 election leaves $300,000 of basis, and bonus depreciation absorbs that $300,000 in the same year.
The two provisions differ on nearly every constraint that matters, and the differences decide which one a tenant should lead with. The comparison below reflects the 2026 figures published in Revenue Procedure 2025-32 and the permanent bonus rate established by the One Big Beautiful Bill Act.
AttributeSection 179100% Bonus Depreciation2026 dollar cap$2,560,000No capSpending phase-outBegins at $4,090,000; zero at $6,650,000NoneBusiness income limitationYes, capped at taxable business incomeNoCan create a net operating lossNoYesElection granularityPer asset, and a partial amount may be electedApplies automatically to an entire asset class unless elected outDisallowed amountCarries forward indefinitelyNot applicableApplies to roofs and HVAC (39-year)Yes, under the 179(f) carve-outNo, recovery period exceeds 20 yearsState conformityBroad, though several states cap the amountNarrower, many states decouple entirely
Election granularity is the attribute that most often decides the answer. Section 179 can be elected on one asset and skipped on another, and it can be elected for a partial amount on a single asset. Bonus depreciation is an all-or-nothing choice made at the asset class level, which means electing out of bonus for the 15-year class removes it from every 15-year asset placed in service that year. A tenant who wants to expense the build-out but preserve depreciation on a separate 15-year asset needs Section 179 to do the surgical work, and that flexibility is what makes the business income limitation worth planning around rather than avoiding. Applying the elections in the right order is a core part of tax strategy in any year with significant capital spending.
Can You Take Section 179 If You Have a Loss?
You cannot take a Section 179 deduction that creates or increases a loss, because IRC Section 179(b)(3) caps the deduction at your aggregate taxable income from the active conduct of any trade or business during the year. The amount disallowed by that cap is not lost. It carries forward indefinitely and becomes available in the first future year with enough business income to absorb it.
Business income for this purpose is broader than net profit from the single activity. It includes W-2 wages earned by the taxpayer, income from other active businesses, and, on a joint return, the spouse's earned income. A consultant with $40,000 of net business profit and $150,000 of W-2 wages has $190,000 of business income available to absorb a Section 179 election, which is a figure many filers underestimate when they assume the build-out cannot be expensed.
Bonus depreciation is the answer when the business income simply is not there. A tenant who completes a $350,000 build-out in a startup year with $60,000 of business income can elect $60,000 under Section 179, carry the rest forward, or take 100% bonus depreciation on the full $350,000 and generate a net operating loss that offsets future income. The better path depends on projected income across the next three to five years and on the marginal rate expected in each of them, which is the kind of multi-year modeling our Virtual CFO engagements run before a construction contract is signed.
Who Claims the Deduction, the Landlord or the Tenant?
The party that pays for the improvement and owns it claims the depreciation deduction, which is the tenant when the tenant funds the build-out directly and the landlord when the landlord funds it through a construction allowance. Ownership follows the money and the lease language together, and a lease that assigns ownership of the improvements to the landlord on completion can shift the depreciable basis even when the tenant wrote the checks.
Tenant improvement allowances are where the analysis gets specific. A landlord who pays a construction allowance and retains ownership of the resulting improvements capitalizes the cost and depreciates it, and the tenant excludes the allowance from gross income under IRC Section 110 when the lease is a short-term lease of retail space and the allowance is used for qualified construction. An allowance that falls outside Section 110 is generally taxable income to the tenant, and the tenant then capitalizes and depreciates the improvements it funded. Two economically similar deals can therefore produce opposite tax outcomes based on lease drafting alone.
We raise this with commercial tenants in Miami before the lease is executed rather than after, because the allowance structure is negotiable while the tax treatment of a signed lease is not. The same conversation covers who owns the improvements at expiration, whether the tenant is obligated to restore the space, and how the allowance is documented. Those three points determine the depreciation answer for both parties, and pulling them forward into the negotiation is one of the more concrete places business consulting work changes a financial outcome.
Does Section 179 Work for Leases?
Section 179 works for leased space, because the current QIP rules contain no lease requirement at all. The improvement must be interior, nonresidential, and placed in service after the building opened. Whether the taxpayer owns the building, leases it, or subleases it does not affect QIP eligibility, which is the single largest simplification the Tax Cuts and Jobs Act delivered in this area.
Lease payments themselves follow a separate rule. Rent paid for business space is an ordinary and necessary business expense deductible in full in the year paid or accrued under IRC Section 162, and it is never capitalized or depreciated. The distinction is between occupancy cost, which is expensed, and improvement cost, which is capitalized and then expensed through an election. A restaurant paying $8,000 a month in rent deducts $96,000 of rent for the year and separately treats the $300,000 kitchen build-out as QIP, and that split is one of the recurring adjustments we make in restaurant accounting files where construction costs were coded to rent expense.
Repairs sit on the same boundary and get misclassified just as often. Routine maintenance, painting, patching, and fixture replacement that keeps the space in ordinary operating condition is a current deduction rather than a capitalized improvement. Work that betters the property, restores it, or adapts it to a new use is capitalized under the tangible property regulations in Treasury Regulation Section 1.263(a)-3. The de minimis safe harbor in those same regulations allows items below a set per-invoice threshold to be expensed outright, which removes small fixtures from the capitalization analysis entirely.
Are Land Improvements Eligible for Section 179?
No, land improvements are not eligible for Section 179. Land improvements such as fences, sidewalks, parking lots, driveways, landscaping, retaining walls, and swimming pools are classified as 15-year MACRS property under IRC Section 1250 and are specifically excluded from Section 179 expensing. The exclusion exists because Section 179 applies to tangible personal property classified under Section 1245 and to certain qualified real property improvements on nonresidential buildings, while land improvements fall into neither category. The critical planning point is that land improvements do qualify for 100% bonus depreciation under the One Big Beautiful Bill Act (OBBBA), which was signed into law on July 4, 2025, and permanently restored the 100% rate for qualifying property acquired after January 19, 2025. A $150,000 parking lot that cannot be expensed through Section 179 can still be written off entirely in Year 1 through bonus depreciation.
The sections below cover what land improvements are and how they differ from other property categories, why they are excluded from Section 179, how bonus depreciation provides the alternative, the difference between land improvements and building improvements, which property types do qualify for Section 179, whether specific items like fences and parking lots qualify, how to depreciate land improvements correctly, and what the current depreciation rules look like for 2026 after the OBBBA.
Key Takeaways
- Land improvements are not eligible for Section 179 expensing. They are classified as 15-year MACRS property under IRC Section 1250, which is outside the scope of Section 179.
- Land improvements do qualify for 100% bonus depreciation under the OBBBA for property acquired after January 19, 2025. Bonus depreciation has no dollar cap and no business income limitation.
- Land itself is never depreciable. Only improvements to land with a determinable useful life qualify for depreciation treatment.
- Common land improvements include fences (non-agricultural), sidewalks, driveways, parking lots, landscaping, retaining walls, swimming pools, docks, bridges, and stormwater drainage systems.
- Agricultural fences are an exception. Single-purpose agricultural and horticultural structures, including agricultural fencing, qualify for Section 179 under IRC Section 179(d)(5).
- Building improvements are treated differently from land improvements. Qualified improvement property (QIP), which covers interior improvements to nonresidential buildings, qualifies for both Section 179 and bonus depreciation as 15-year property.
- Roofs, HVAC, fire protection, alarm systems, and security systems on nonresidential property qualify for Section 179 under the IRC Section 179(f) carve-out, even though they are real property.
- Cost segregation studies identify land improvements within a property purchase, separating them from the building structure so they can be depreciated over 15 years instead of 27.5 or 39 years.
What Are Land Improvements?
Land improvements are additions to land that have a determinable useful life and enhance the property's functionality, accessibility, or value, as distinct from the land itself and from the building structure. The IRS classifies land improvements as 15-year MACRS property under Revenue Procedure 87-56, asset class 00.3. Land improvements depreciate using the 150% declining balance method with a half-year convention, per IRS Publication 946, Table A-1.
Common examples of land improvements include:
- Paved parking areas and driveways
- Sidewalks and pathways
- Non-agricultural fences and gates
- Landscaping (trees, shrubs, sod, irrigation systems)
- Retaining walls
- Swimming pools (in-ground)
- Docks, wharves, and bridges
- Stormwater drainage and grading
- Outdoor lighting systems
- Tennis and basketball courts
Each of these items has a useful life that can be measured and that will eventually end, which is what separates them from land itself. Land has no determinable useful life, does not wear out, and is never depreciable under any method. The distinction between land and land improvement is fundamental to the depreciation calculation, and getting it wrong in either direction, treating land as depreciable or treating a land improvement as non-depreciable, produces a tax position that will not survive review. A cost segregation study is the most reliable way to separate land improvements from building components and land when a property is acquired as a single purchase.
Why Are Land Improvements Excluded from Section 179?
Land improvements are excluded from Section 179 because they are classified as Section 1250 property under the Internal Revenue Code, and Section 179 applies primarily to Section 1245 property, which is tangible personal property used in a trade or business. The statutory language of IRC Section 179(d)(1) limits the deduction to "section 179 property," defined as tangible property that is Section 1245 property and is acquired by purchase for use in the active conduct of a trade or business. Land improvements, classified under asset class 00.3 as improvements to land rather than as tangible personal property, fall outside that definition.
Congress carved out specific exceptions for certain real property items that would otherwise be excluded. IRC Section 179(f) extends eligibility to qualified improvement property (QIP), roofs, HVAC systems, fire protection and alarm systems, and security systems on nonresidential buildings. These carve-outs were added by the Tax Cuts and Jobs Act (TCJA) in 2017 to encourage investment in commercial building improvements. Land improvements were not included in those carve-outs. The result is a gap that catches many business owners by surprise: a new roof on a commercial building qualifies for Section 179, but a new parking lot serving the same building does not.
The exclusion does not mean land improvements receive no tax benefit in Year 1. Bonus depreciation under IRC Section 168(k) applies to property with a MACRS recovery period of 20 years or less, and 15-year land improvements fall well within that threshold. The OBBBA permanently set bonus depreciation at 100% for qualifying property acquired after January 19, 2025, which means the practical effect for most business owners is the same: a full first-year write-off. The difference is which provision produces the deduction and which limitations apply. Bonus depreciation has no annual dollar cap and no business income limitation, which actually makes it more flexible than Section 179 for this category of property. Understanding these tax planning distinctions before a capital project begins is what allows the deduction to be captured correctly on the return.
Can You Take Bonus Depreciation on Land Improvements?
Yes, you can take 100% bonus depreciation on land improvements placed in service after January 19, 2025, under the OBBBA's permanent restoration of IRC Section 168(k). Land improvements are 15-year MACRS property, which satisfies the bonus depreciation requirement that the asset have a recovery period of 20 years or less. Bonus depreciation has no annual dollar cap, no phase-out based on total spending, and no limitation tied to business income, making it the primary tool for accelerating deductions on land improvements.
The table below compares how different categories of property are treated under Section 179 and bonus depreciation, so the distinction between land improvements and other asset types is visible in one place.
Property CategoryMACRS LifeSection 179 Eligible?Bonus Depreciation Eligible?Land (raw, undeveloped)Not depreciableNoNoLand improvements (fences, sidewalks, parking lots, landscaping)15 yearsNoYes (100%)Tangible personal property (appliances, furniture, equipment)5 or 7 yearsYesYes (100%)Qualified improvement property (interior nonresidential improvements)15 yearsYesYes (100%)Roofs (nonresidential only)39 years (179(f) carve-out)Yes (nonresidential)NoHVAC systems (nonresidential only)39 years (179(f) carve-out)Yes (nonresidential)NoFire protection, alarm, security (nonresidential only)39 years (179(f) carve-out)Yes (nonresidential)NoResidential rental building structure27.5 yearsNoNoNonresidential building structure39 yearsNoNo
The table reveals an important asymmetry. Land improvements qualify for bonus depreciation but not Section 179, while roofs and HVAC on nonresidential property qualify for Section 179 but not bonus depreciation (because they are 39-year property exceeding the 20-year bonus threshold). The Section 179(f) carve-out is what gives roofs and HVAC their Section 179 eligibility despite being real property, and no equivalent carve-out exists for land improvements. Business owners planning a commercial property renovation that includes both a new roof and a new parking lot face two different deduction paths for two assets placed in service in the same year.
What Is the Difference Between Land Improvements and Building Improvements?
The difference between land improvements and building improvements is that land improvements are external additions to the land itself (parking lots, fences, sidewalks), while building improvements are modifications to the interior or systems of a building structure. The tax treatment of each category is different, and the classification determines which depreciation provisions apply.
Building improvements on nonresidential property that qualify as QIP under IRC Section 168(e)(6) have a 15-year recovery period and are eligible for both Section 179 and 100% bonus depreciation. QIP covers any improvement to the interior of a nonresidential building that is placed in service after the building was first placed in service, excluding enlargements, elevators, escalators, and modifications to the internal structural framework. A kitchen renovation in a commercial restaurant, an office build-out in a leased retail space, or a lobby redesign in a medical office all qualify as QIP.
Land improvements share the same 15-year recovery period as QIP but fall under a different IRC classification (Section 1250, asset class 00.3) and do not qualify for Section 179. This means a commercial property owner investing $200,000 in an interior renovation (QIP) can use Section 179 to expense it immediately, while the same owner investing $200,000 in a new parking lot (land improvement) must use bonus depreciation instead. Both produce a full Year 1 write-off under current law, but the reporting mechanism and the limitations differ. Section 179 is limited by taxable business income, while bonus depreciation is not. For owners with limited income in the current year, bonus depreciation on land improvements can create or deepen a net operating loss that Section 179 cannot. We model these differences during Virtual CFO engagements with commercial property owners to determine which path produces the best multi-year tax result.
What Types of Property Are Eligible for Section 179?
Property eligible for Section 179 includes tangible personal property used in a trade or business (equipment, machinery, furniture, appliances), off-the-shelf computer software, and certain real property improvements on nonresidential buildings (QIP, roofs, HVAC, fire protection, alarm systems, and security systems). The 2026 Section 179 deduction limit is $2,560,000, with the phase-out beginning at $4,090,000 of total qualifying property placed in service, per Rev. Proc. 2025-32. The OBBBA raised the baseline Section 179 limit from $1,000,000 to $2,500,000, indexed annually for inflation.
Property that does not qualify for Section 179 includes land, land improvements, building structures (residential and nonresidential), property with a recovery period exceeding 20 years (except for the specific 179(f) carve-outs), property used 50% or less for business, property acquired from a related party, and property used outside the United States. The business consulting question most owners face is not whether they have Section 179-eligible property, but whether they have correctly classified each asset into the right depreciation category before claiming the deduction.
Do Fences Qualify for Section 179?
Non-agricultural fences do not qualify for Section 179 because they are land improvements classified as 15-year MACRS property under IRC Section 1250. A chain-link fence around a commercial parking lot, a privacy fence around a rental property, or a decorative fence around an office building are all land improvements that must be depreciated over 15 years or written off through bonus depreciation. They cannot be expensed through Section 179.
Agricultural fences are the exception. IRC Section 179(d)(5) defines "section 179 property" to include single-purpose agricultural and horticultural structures, which encompasses fencing used in farming operations to contain or exclude livestock. A fence around a cattle pasture, a hog pen, or a poultry enclosure qualifies for Section 179 as a single-purpose agricultural structure. The distinction turns on the fence's purpose: if the fence is integral to an agricultural operation, it qualifies. If the fence serves a general commercial or residential purpose, it does not. Documentation of the fence's agricultural use and the type of operation it supports is what holds the classification together if questioned. Farmers and ranchers who maintain clean financial statements separating agricultural assets from general property assets protect the Section 179 election on these items.
Does a Parking Lot Qualify for Section 179?
No, a parking lot does not qualify for Section 179. Paved parking areas are land improvements under IRS asset class 00.3 and are specifically listed in IRS Publication 946 as examples of 15-year MACRS property that is not Section 179-eligible. A new parking lot, a repaving project, and the addition of striping and curbing to an existing lot all fall into this category.
A parking lot does qualify for 100% bonus depreciation under the OBBBA for projects placed in service after January 19, 2025. A commercial property owner who installs a $200,000 parking lot in 2026 can deduct the full $200,000 in Year 1 through bonus depreciation, producing the same immediate cash flow benefit that Section 179 would have provided. The practical difference is that bonus depreciation can create a net operating loss while Section 179 cannot, and several states that do not conform to federal bonus depreciation will require the parking lot to be depreciated over a longer period on the state return.
