Can You Take Section 179 on Commercial Rental Property?

You can take Section 179 on commercial rental property, but only on specific interior improvements and a short list of building-system upgrades, never on the building itself or the land under it, and only when your rental activity qualifies as an active trade or business. For tax years beginning in 2026, the maximum Section 179 deduction is $2,560,000, with a dollar-for-dollar phase-out starting once total Section 179 property placed in service exceeds $4,090,000.¹

What Qualifies Inside a Commercial Building

Two categories of property inside a nonresidential building are eligible. The first is qualified improvement property (QIP): improvements to the interior of a nonresidential building placed in service after the building was first placed in service.² Common examples are new flooring, updated ceiling grids, interior lighting, and tenant build-outs.

The second category comes from the Tax Cuts and Jobs Act, which added four specific improvements to nonresidential real property, again placed in service after the building was first put to use:³

Roofs, including replacements and major repairs to an existing commercial roof.
HVAC systems, whether new equipment or upgrades.
Fire protection and alarm systems, such as sprinklers and smoke detection.
Security systems, including cameras, alarm hardware, and access controls.

Being able to expense these immediately matters because the alternative is stretching the cost across the 39-year depreciation period for nonresidential real property.³ Document the exact date each improvement is placed in service, meaning functional and ready for use.

What Doesn’t Qualify

Several items are off the table no matter how actively you run the property:

Residential rental property. Section 179 references Section 50(b), which excludes property used for lodging, so apartment buildings and dormitories don’t qualify.⁴
Land, which is never depreciable.
Building enlargements that add square footage or expand the footprint.²
Elevators and escalators, which are specifically excluded from QIP.
Internal structural framework, including load-bearing walls and columns.
Improvements made during the original construction of a new building, because they weren’t placed in service after the building itself was.

The Trade or Business Requirement

Section 179 property must be acquired by purchase for use in the active conduct of a trade or business.⁴ For a commercial rental, that means your involvement is continuous, regular, and substantial. Collecting rent on a property that mostly runs itself is passive investment, and passive investment doesn’t qualify.

Triple net leases are the hardest case. When the tenant pays taxes, insurance, and maintenance, the owner has almost nothing to do, and the rental usually reads as passive. That blocks Section 179 entirely. Landlords who negotiate their own leases, oversee repairs, deal with tenants, and make operational decisions have a much stronger position, and keeping records of that time strengthens it further.

The 250-Hour Safe Harbor

Revenue Procedure 2019-38 offers a safe harbor for treating a rental enterprise as a trade or business. You need at least 250 hours of rental services per year. For an enterprise that has existed for four or more years, you need to hit 250 hours in at least three of the prior five consecutive tax years.⁵ Contemporaneous time logs and separate books for each enterprise are required, and hours worked by employees or contractors count if you can back them up with wage or payment records.

Dollar Limit and Phase-Out for 2026

The statutory cap is $2,500,000, adjusted for inflation each year.⁴ For 2026 the inflation-adjusted cap is $2,560,000. The phase-out begins dollar-for-dollar once total Section 179 property placed in service in the year exceeds $4,090,000, and the deduction disappears entirely once purchases reach $6,650,000.¹

These limits apply per taxpayer, not per property. If you own several commercial buildings and expense improvements across all of them, one cap covers the total. Married couples filing jointly share a single limit.

The Taxable Income Limit

Your Section 179 deduction for the year cannot exceed your total taxable income from the active conduct of any trade or business.⁶ If the rental is your only business and posts a net loss, Section 179 can’t be used to deepen that loss.

W-2 wages help here. The IRS treats employees as actively conducting the trade or business of their employment, so your salary from a day job, and your spouse’s wages on a joint return, count toward the income limit.⁷ That’s why many landlords with outside jobs can still claim the full deduction on a modest-income rental. Anything disallowed by the income limit carries forward indefinitely and is available in a later year, subject to that year’s own dollar and income limits.⁶

Section 179 vs. Bonus Depreciation

Qualified improvement property is also eligible for bonus depreciation, which can supplement Section 179 or stand in for it. The One Big Beautiful Bill Act, signed in 2025, restored 100 percent bonus depreciation for qualifying business property acquired and placed in service after January 19, 2025.⁸ For property acquired before that date but placed in service in 2026, the bonus rate is 20 percent.

Bonus depreciation has no dollar cap and no taxable income limit, so it can create or increase a net operating loss. Section 179 has both limits but lets you elect exactly how much to expense on which items. A common approach is to use Section 179 first up to the income limit, then apply bonus depreciation to whatever eligible cost remains.

Recapture Risk

Section 179 is treated as depreciation for recapture purposes. When you sell commercial property on which you claimed the deduction, any gain up to the amount of depreciation previously allowed, including the Section 179 amount, is recaptured as ordinary income under the Section 1245 rules.⁹

Recapture can also hit without a sale. If business use of the property drops to 50 percent or less before the end of the recovery period, you have to report the Section 179 benefit as other income for that year. Converting the property to personal use or scaling back your management enough to lose active trade-or-business status can trigger this.

How to Claim It

You elect Section 179 on Form 4562, filed with either the original return for the year the property was placed in service or a timely amended return for that year. The form identifies each item of Section 179 property and the portion of cost you’re electing to expense.⁹

State treatment varies widely. Some states conform fully to the federal deduction; others cap the state-level deduction well below the federal number. Check your state’s rules before assuming the full federal benefit flows through.

1
IRS.gov. Inflation-Adjusted Items for 2026 (Rev. Proc. 2025-32)
2
Legal Information Institute. Definition: Qualified Improvement Property From 26 USC 168(e)(6)
3
Internal Revenue Service. Publication 946 (2024), How To Depreciate Property
4
Office of the Law Revision Counsel. 26 U.S. Code 179 – Election to Expense Certain Depreciable Business Assets
5
IRS.gov. Revenue Procedure 2019-38 – Section 199A Safe Harbor for Rental Real Estate
6
Office of the Law Revision Counsel. 26 U.S.C. 179 – Election to Expense Certain Depreciable Business Assets
7
eCFR. 26 CFR 1.179-2 – Limitations on Amount Subject to Section 179 Election
8
Internal Revenue Service. One, Big, Beautiful Bill Provisions
9
Internal Revenue Service. Instructions for Form 4562