The BAR Test: IRS Framework for Capital Improvements vs. Repairs

The IRS uses a three-part framework called the BAR test to decide whether money spent on tangible property is a repair you can deduct this year or a capital improvement you have to depreciate over decades. BAR stands for Betterment, Adaptation, and Restoration. If an expenditure meets any one of the three prongs, you must capitalize it.¹

The stakes are real. A deductible repair reduces your taxable income right away. A capitalized improvement gets spread across 27.5 years for residential rental property or 39 years for commercial buildings.² Getting the call wrong can bring an accuracy-related penalty of 20% of the underpayment, or 40% for gross valuation misstatements.³

Start by Identifying the Unit of Property

You cannot run the BAR test without first fixing what you are measuring against. The IRS applies each prong to a defined “unit of property,” not to the whole building. For a building, the unit is the structure itself plus eight separately identified building systems.¹ Those systems are:

HVAC (heating, ventilation, and air conditioning)
Plumbing
Electrical
Elevators
Escalators
Fire protection and alarm
Gas distribution
Security

This is where many taxpayers slip. Replace a large portion of the plumbing and the IRS measures the work against the plumbing system alone, not against the whole building. That smaller denominator often turns what looked like a minor repair into a restoration or betterment. Treating it as trivial because it cost a fraction of the building’s value is exactly the misclassification that draws audit attention.

For personal property, functionally connected components generally make up one unit. The engine, transmission, and body of a delivery truck are a single unit. The exception is a component that performs a truly separate function from the rest of the machine.¹

Betterment

Betterment catches the widest range of expenses. An expenditure is a betterment if it does any of three things to the unit of property: corrects a defect that existed before you acquired the property, physically enlarges or expands it, or materially increases its capacity, strength, output, efficiency, or quality.¹

Pre-Existing Defects

Buy a commercial building, then discover the foundation has structural cracks that predate your ownership. The cost to fix those cracks is a capital improvement, not a repair, even though you had no idea the defect existed when you closed. The IRS gives the example of a buyer who acquires land with a leaking underground storage tank left by the prior owner: the cleanup must be capitalized because it fixes a condition that predated acquisition.¹

The “Material” Question

There is no bright-line percentage or dollar threshold for what counts as a material increase. The regulations tell you to use common sense and reasonable judgment based on the specific facts.¹ Minor cosmetic fixes generally stay on the repair side. The more you spend, and the more fundamental the change, the harder it becomes to argue the improvement wasn’t material.

Enlargement and Increased Capacity

Adding a new floor to a commercial building, expanding a retail store’s square footage, or upgrading a machine so it produces significantly more output all fall here. Replacing a standard roof with a reinforced version designed to support rooftop equipment would likely qualify, because it materially increases structural strength. Adding seismic anchor bolts to a building frame is a betterment for the same reason, even though the bolts don’t change the building’s size.¹

Routine maintenance that keeps an asset running at its existing performance level stays deductible. The line falls between returning something to how it was and making it meaningfully better than it was. Document the asset’s output, capacity, or condition before and after the work so you can defend your position either way.

Adaptation

The adaptation prong captures expenditures that shift the property to a new or different use, inconsistent with the intended use when you placed it in service.⁴ Converting a warehouse to a retail showroom, turning apartments into commercial offices, or reworking a manufacturing plant into loft residences all qualify.

The scale of construction doesn’t control the outcome. Even a modest renovation can trigger adaptation if the functional shift is significant. A small conversion of a ground-floor storage area into a customer-facing café still counts, because the space now serves an entirely different purpose. The IRS looks at whether the new activity differs meaningfully from the original one, especially when the change requires different zoning, licensing, or structural work.

Adaptation does not cover upgrading the same use. Renovate a restaurant kitchen with better equipment and new tile, and you are improving a space that was already a kitchen. That expense gets analyzed under betterment, not adaptation. Adaptation specifically requires a shift from one functional category to another.

Restoration

Restoration is tied most closely to catastrophic events and end-of-life replacements. An expenditure is a restoration when any of these apply:¹

You previously claimed a casualty loss or received insurance proceeds that reduced the property’s basis, and you spent money to repair the damage.
The property deteriorated to the point where it no longer functioned for its intended purpose, and you brought it back. The IRS example: a farm outbuilding that fell into complete disrepair, then was restored with new walls and siding.
You replaced a major component or substantial structural part, such as an entire building roof or a truck’s engine.
You disassembled and rebuilt equipment to original manufacturer specifications after the end of its useful life.
You replaced a component whose basis was previously used to figure gain or loss on a sale or exchange.

The “major component” question is where taxpayers and the IRS disagree most often. There is no fixed percentage. The regulations call for common sense and reasonable judgment, and the IRS has stated that percentage figures appearing in regulatory examples are not intended to set numerical standards.¹ Replacing a single window or a drive belt on a machine clearly falls short. Replacing every window on a floor, or an entire HVAC compressor, likely crosses the line. Everything in between is a judgment call. Detailed records of what was replaced and why are your best protection.

Safe Harbors That Let You Skip the BAR Analysis

Three safe harbors let you bypass the BAR test for qualifying expenses. Each is an election, not a default. You must claim it on your return, and missing the election means you lose the benefit for that year.

De Minimis Safe Harbor

With an applicable financial statement (typically an audited financial statement), you can expense items costing up to $5,000 per invoice or item. Without one, the limit is $2,500 per invoice or item.⁵ You elect it by attaching a statement titled “Section 1.263(a)-1(f) de minimis safe harbor election” to a timely filed return, and it is not a change in accounting method.¹

Routine Maintenance Safe Harbor

You can deduct recurring maintenance that keeps property in ordinary operating condition, provided you reasonably expected to perform the activity more than once during the applicable timeframe. For building structures and building systems, that timeframe is a 10-year window beginning when the property is placed in service. For other property, it is the asset’s class life.¹ The safe harbor does not apply to betterments. It can cover some restorations, including replacement of a major component, if the activity meets the recurring-maintenance criteria. Repainting on a schedule or routinely swapping HVAC filters fits. A one-time emergency overhaul after years of neglect does not.

Small Taxpayer Safe Harbor

Smaller landlords and business owners can deduct repair, maintenance, and improvement costs on a building without running the BAR analysis if all three conditions are met:¹

Average annual gross receipts of $10 million or less.
Unadjusted basis of the building of $1 million or less.
Total annual repair, maintenance, and improvement spending on the building at or below the lesser of 2% of unadjusted basis or $10,000.

A landlord with a $400,000 unadjusted basis has a spending cap of $8,000 (2% of $400,000). Stay under that, and everything is deductible regardless of whether the work would otherwise be an improvement. Like the de minimis election, this requires an annual statement with the return and is not a change in accounting method.

Don’t Forget the Partial Disposition Election

When BAR forces you to capitalize a replacement component, the old component you tore out still matters. Without a partial disposition election, you keep depreciating the old component’s remaining basis alongside the new one, running phantom depreciation on a roof that is sitting in a landfill.

The election lets you write off the remaining adjusted basis of the disposed component as a loss in the year of disposition, for tax years beginning on or after January 1, 2014. You make it by reporting the gain or loss on a timely filed original return, including extensions. No special form is required.⁶

Replace an entire commercial roof and you capitalize the new one as a restoration. Then you elect the partial disposition to book a loss on the old roof’s undepreciated basis. You get both a loss deduction on what was removed and a fresh depreciation schedule on what replaced it. The election only applies to MACRS property. Some partial dispositions are mandatory rather than elective: casualty loss claims on a component, like-kind exchanges of a portion, and sales of part of an asset all require recognition whether you elect or not.⁶

Fixing Prior-Year Misclassifications

If you have been capitalizing expenses that should have been deducted, or deducting expenses that should have been capitalized, you can’t just quietly switch treatment on next year’s return. Changing how you treat tangible property expenditures is a change in accounting method, and it takes a Form 3115.⁷

Changes to adopt the tangible property regulations qualify for automatic consent. You file Form 3115 with designated change number (DCN) 184 attached to a timely filed return for the year of change.⁸ The real benefit is the Section 481(a) adjustment, which catches up prior-year treatment without amending old returns. A negative adjustment (missed deductions) is taken in full in the year of change. A positive adjustment (over-deducted) is generally spread over four years. Owners who spent years capitalizing routine repairs can pick up a substantial one-time deduction this way.

What Capitalized Costs Do to Your Basis

Every dollar you capitalize under BAR gets added to the property’s adjusted basis. You keep a separate depreciation account for each improvement and depreciate it under the rules that apply to the underlying property, as if you placed the improvement in service at that time.⁹ A new roof on a residential rental starts its own 27.5-year schedule from completion.⁴

Higher basis also reduces your taxable gain on sale. Every capitalized dollar shrinks the spread between sale price and adjusted basis later. Deducted repairs give you an immediate tax benefit but do nothing for basis. Neither approach is inherently better; BAR exists to draw the line based on the facts. Keep records of every improvement, its cost, and its placed-in-service date. You will need that information for annual depreciation and again when you calculate gain on a future sale.

1
Internal Revenue Service. Tangible Property Final Regulations
2
Internal Revenue Service. Publication 946 (2025), How To Depreciate Property
3
Internal Revenue Service. Internal Revenue Manual – 20.1.5 Return Related Penalties
4
Internal Revenue Service. Publication 527 (2025), Residential Rental Property
5
Internal Revenue Service. Notice 2015-82
6
Internal Revenue Service. Identifying a Taxpayer Electing a Partial Disposition of a Building
7
Internal Revenue Service. Application for Change in Accounting Method (Form 3115)
8
Internal Revenue Service. Revenue Procedure 2024-23
9
Internal Revenue Service. Publication 551 (12/2025), Basis of Assets