Can You Deduct a Major Commercial Building Repair, or Must You Depreciate It?
- Trisha S. Allen, CPA, CTRS, MAcc

- May 29
- 2 min read
When a large commercial building expense hits your desk, one of the first tax questions is whether the cost can be deducted immediately or whether it must be capitalized and depreciated over 39 years.
And contrary to what many property owners assume, the answer is not determined solely by the dollar amount.
Consider a recent example. An office building owner replaced a failed sliding glass door and frame at a total cost of approximately $12,000, including removal and installation. The replacement unit was the same brand, size, and quality as the original. There was no redesign, expansion, or material upgrade to the building.
Under the IRS tangible property regulations, building costs generally must be capitalized if they result in a:
betterment
restoration
adaptation to a new or different use
These are commonly referred to as the “BAR” tests.
In this situation, replacing a failed component with substantially similar materials and functionality may not clearly meet the capitalization standards. As a result, there may be support for deducting the cost currently as a repair expense under Section 162.
However, facts and circumstances matter.
The IRS evaluates these situations based on the nature and scope of the work performed, not simply the invoice amount. A large expense can still qualify as a deductible repair, while a smaller project may need to be capitalized depending on what was actually done.
Some taxpayers may still prefer a more conservative approach and choose capitalization instead. If capitalized, the entire project cost, including installation, would generally be depreciated over 39 years as nonresidential real property.
In certain situations, taxpayers may also be able to recognize a partial disposition loss on the removed component, allowing a deduction for the remaining basis of the old asset that was replaced.
This area of the tax law is highly fact-specific, particularly when dealing with commercial buildings, tenant improvements, or recurring maintenance projects.
The key takeaway is that not every expensive building cost automatically becomes a capital improvement. The tax treatment depends on whether the work materially improved, restored, or adapted the property under the IRS regulations.
At T. S. Allen & Associates, we help business owners and real estate investors evaluate repair versus capitalization issues as part of proactive tax planning throughout the year. Proper analysis can sometimes create significant timing differences in deductions, cash flow, and taxable income. Click here to reach out to us to see how we may be of service.
We provide these articles as general information and not individualized tax advice. They do not constitute a client relationship with you, and any information provided here should be applied at your own risk.


