Repairs vs. Improvements: The BAR Test and Safe Harbors

For rental or business property, the repairs vs improvements tax treatment question comes down to a single line: if the work keeps the property in its existing working condition, you deduct the full cost this year; if it betters, adapts, or restores the property, you add the cost to basis and recover it through depreciation over years. Getting the call right can move thousands of dollars between this year’s return and future ones, and the IRS has built specific tests and safe harbors to sort one from the other.

The Rule Only Matters for Business or Rental Property

One threshold point before anything else. If the property is your personal residence, neither a repair nor an improvement produces a current deduction. Federal law bars deductions for personal living expenses.¹ The analysis in this article produces a tax benefit only when the property is used in a trade or business, held for rental income, or otherwise used to produce income. A home-office or in-home rental portion can qualify for the business share of maintenance and repair costs.²

What Counts as a Repair

A repair keeps property in its ordinary working condition without making it more valuable or extending its useful life. Sealing a pipe leak. Patching drywall. Replacing a cracked window pane. Repainting a unit between tenants. These are ordinary and necessary business expenses, deductible in full in the tax year you pay or incur them.³ For rental owners, they land on Schedule E as current-year expenses, and the IRS explicitly recognizes that maintaining rental property in ordinarily efficient operating condition is deductible rather than capital.⁴

The defining feature: the work returns the property to the condition it was in before something broke or wore out. It doesn’t upgrade, expand, or change the property’s function.

What Counts as an Improvement

An improvement makes the property more valuable, extends its life, or adapts it to a new use. Federal law prohibits deducting amounts paid for permanent improvements or betterments that increase the value of property.⁵ You capitalize the cost, add it to the property’s adjusted basis, and recover it through annual depreciation deductions.

How long depreciation takes depends on what you improved. Under the Modified Accelerated Cost Recovery System, the standard recovery periods are:

Residential rental property: 27.5 years⁴
Nonresidential real property: 39 years⁶
Land improvements such as fences, parking lots, and landscaping: 15 years⁶

A new roof on a rental duplex is a structural component that spreads across 27.5 years, which works out to roughly 3.6% of its cost deducted each year rather than the whole amount up front. The offset is that the higher adjusted basis reduces your capital gain when you eventually sell.

The Betterment, Adaptation, and Restoration Test

Many projects don’t fall neatly on one side. For those, the IRS applies a three-part test. If the work meets any one of these standards, you must capitalize it.⁷

Betterment

A cost is a betterment if it fixes a defect that existed before you acquired the property, materially increases the property’s physical size, or meaningfully upgrades its capacity or quality. Upgrading a building’s electrical service from 100-amp to 400-amp to run industrial equipment is a classic betterment: the system doesn’t just work again, it works at a level it never reached before. The IRS has not set a numeric threshold for when an upgrade is “material,” so this turns on the full facts and circumstances.

Adaptation

Adaptation means altering the property for a use inconsistent with its original intended use. Converting a warehouse into residential lofts is the textbook example. Even if each task on the invoice looks like routine construction, the shift in use triggers capitalization. The IRS compares what you originally placed in service with what the property becomes after the work.

Restoration

Restoration covers the replacement of a major component or substantial structural part. Replacing an entire HVAC system, rebuilding most of a foundation, or gutting and replacing all the plumbing qualifies. As with betterment, there’s no bright-line percentage for what counts as “substantial,” and this is where many disputes with the IRS land.

Safe Harbors That Let You Skip the Analysis

Running the betterment-adaptation-restoration test against every invoice is impractical, so three regulatory safe harbors let qualifying taxpayers deduct certain costs currently without doing the analysis.

De Minimis Safe Harbor

This election lets you immediately deduct small-ticket items instead of capitalizing them. The per-invoice or per-item cap is $5,000 if you have an applicable (audited) financial statement, and $2,500 if you don’t.⁷ Once elected, it applies to all qualifying expenditures for the year, not just the ones you like. You make the election annually by attaching a statement titled “Section 1.263(a)-1(f) de minimis safe harbor election” to a timely filed return. It isn’t an accounting method change, so Form 3115 isn’t required.

Safe Harbor for Small Taxpayers

This one is built for smaller buildings. Three conditions all have to be met:

The building’s unadjusted basis is $1 million or less.
Average annual gross receipts over the prior three years are $10 million or less.
Total repair, maintenance, and improvement costs for the building during the year don’t exceed the lesser of $10,000 or 2% of the building’s unadjusted basis.⁷

When all three are satisfied, you can deduct the full year’s spending on that building even if some of the work technically looks like an improvement.

Routine Maintenance Safe Harbor

Recurring upkeep that keeps property in ordinarily efficient operating condition can be deducted under this safe harbor even when the work would otherwise look like a restoration. The requirement: at the time the property is first placed in service, you must reasonably expect to perform the activity more than once during a set window. That window is 10 years for building structures and building systems, and the asset’s class life for other property.⁷

The important limit: this safe harbor does not cover betterments. If the work upgrades capacity or fixes a pre-acquisition defect, routine maintenance treatment isn’t available. It can cover certain restorations, including major component replacements, if the recurring-activity test is met.

Faster Recovery When You Do Have to Capitalize

Capitalizing an improvement doesn’t always mean waiting decades. Two provisions can compress the write-off dramatically for qualifying property placed in service in 2026.

100% Bonus Depreciation

The One Big Beautiful Bill Act, signed in July 2025, permanently restored 100% first-year bonus depreciation for qualified property acquired after January 19, 2025.⁸ Certain capitalized improvements can be fully deducted in the year placed in service, with no annual dollar cap.

The main category for real estate owners is qualified improvement property (QIP): any improvement to the interior of a nonresidential building, excluding enlargements, elevators, escalators, and internal structural framework. QIP has a 15-year MACRS recovery period, which is what makes it eligible for bonus. Renovate the interior of a commercial space in 2026 and those costs may be fully written off in year one. Improvements to residential rental property are not QIP and follow the 27.5-year schedule.

Section 179 Expensing

Section 179 lets a business elect to deduct the full cost of qualifying property in the year placed in service, up to an annual cap. For tax years beginning in 2026, the base $2,500,000 limit is subject to inflation adjustment, bringing the limit to roughly $2,560,000, with a dollar-for-dollar phaseout beginning when qualifying property placed in service exceeds about $4,090,000.⁹

Section 179 also reaches certain improvements to nonresidential real property that fall outside QIP, including roofs, HVAC, fire protection and alarm systems, and security systems. When bonus depreciation isn’t available for a particular improvement, Section 179 can provide an alternative path to a first-year deduction.

Writing Off the Old Component You Replaced

When you capitalize a new component, you can elect to dispose of the old one and deduct its remaining adjusted basis as a loss. This is the partial disposition election.¹⁰ Without it, the old roof’s undepreciated cost sits embedded in the building’s basis, doing nothing for you until sale. With it, you recognize a loss for the remaining basis in the year of disposition.¹¹ It’s available for MACRS property placed in service after 1986 that hasn’t been fully depreciated. You identify the disposed component, allocate its original cost, and back out accumulated depreciation to get the remaining basis.

If you’re capitalizing a $40,000 new roof, you may well have $15,000 or more of undepreciated basis in the old roof to write off the same year.

Fixing Past Misclassifications

Errors in classifying repairs and improvements compound. If you’ve been capitalizing costs that should have been repairs, or deducting costs that should have been capitalized, you correct the error by filing Form 3115 to change your accounting method. Revenue Procedure 2024-23 provides automatic consent for changes under the tangible property regulations.¹² The correction generally uses a Section 481(a) adjustment for the cumulative difference between prior treatment and correct treatment; under the tangible property regs, the look-back reaches amounts paid in tax years beginning on or after January 1, 2014. A favorable adjustment (you over-capitalized) is a one-year catch-up deduction; an unfavorable one spreads over four years.

What Getting It Wrong Costs

Beyond repaying the tax, misclassification can trigger the accuracy-related penalty of 20% on the underpayment attributable to negligence or a substantial understatement.¹³ For individuals, a substantial understatement exists when the understated tax exceeds the greater of 10% of the correct tax or $5,000. Interest runs on both the underpayment and the penalty from the original due date.¹⁴

Aggressive deduction of large projects as “repairs” is a common audit trigger for rental owners. The betterment-adaptation-restoration framework gives examiners a structured way to reclassify expenses, and the IRS has trained heavily on it. Contemporaneous records, invoices, before-and-after photographs, and a written description of the property’s condition are the best defense when the facts genuinely support repair treatment.

1
Office of the Law Revision Counsel. 26 USC 262 – Personal, Living, and Family Expenses
2
Internal Revenue Service. Topic No. 509, Business Use of Home
3
Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses
4
Internal Revenue Service. Publication 527, Residential Rental Property
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Office of the Law Revision Counsel. 26 USC 263 – Capital Expenditures
6
Internal Revenue Service. Publication 946, How To Depreciate Property
7
Internal Revenue Service. Tangible Property Final Regulations
8
Office of the Law Revision Counsel. 26 USC 168 – Accelerated Cost Recovery System
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Office of the Law Revision Counsel. 26 USC 179 – Election To Expense Certain Depreciable Business Assets
10
eCFR. 26 CFR 1.168(i)-8 – Dispositions of MACRS Property
11
Internal Revenue Service. Examining a Taxpayer Electing a Partial Disposition of a Building
12
Internal Revenue Service. Revenue Procedure 2024-23
13
Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments
14
Internal Revenue Service. Accuracy-Related Penalty