Let’s say you just renovated an entire 20,000-square-foot office space and spent half a million dollars on the project. You replaced the carpet, updated the lighting fixtures, added new HVAC equipment, and repainted the building’s exterior. The property looks great, and the tenants love it.
But have you asked yourself, “How long will my CPA depreciate these renovation expenses?”
If your CPA depreciates your renovation costs over 39 years for a commercial property, or 27.5 years for a residential property, you may deduct only about $12,800 annually for the next few decades. However, you paid for the improvements yesterday.
With the right cost segregation study, you can reclassify some renovation costs as assets with 5-, 7-, or 15-year recovery periods. Thanks to the permanent restoration of 100% bonus depreciation under the One Big Beautiful Bill Act, qualified property acquired after January 19, 2025, may also qualify for a full first-year deduction.
Renovations Create a Major Cost Segregation Opportunity
Cost segregation studies do not apply exclusively to new construction or property acquisitions. Property owners can also use them for renovations, buildouts, and tenant improvements.
For a financially successful investor, cost segregation is not simply a nice benefit. It can form an essential part of a broader tax strategy. After all, real estate investors care about how quickly they can recover their investments.
You do not just care about what an improvement costs. You also care about when you can recover that cost. A dollar of depreciation today is worth more than a dollar of depreciation 30 years from now.
Why? A current deduction can offset your current tax liability. As a result, you may retain more cash that you can reinvest in your property, business, or future acquisitions.
Why Standard Depreciation Can Delay Your Deductions
When you renovate a property, your improvement expenses generally become part of the building’s depreciable basis. In other words, the money you spend on improvements adds to the property’s overall asset value.
Without a cost segregation study, you may depreciate most of those costs over the standard 39-year recovery period for commercial real estate or the 27.5-year period for residential rental property. However, not all improvements serve the same purpose or have the same useful life.
For example, carpeting and decorative lighting generally do not last as long as structural components. Parking lot surfaces installed during a renovation may qualify for a 15-year recovery period. Although the tax code may allow shorter recovery periods for these improvements, many property owners never make the necessary distinctions.
With 100% bonus depreciation available for qualifying assets, renovation costs that might qualify for immediate deductions could otherwise remain tied to a multidecade depreciation schedule.
Property owners can use two distinct cost segregation strategies for renovations. Each strategy can generate valuable deductions on its own. However, using them together may produce an even greater tax benefit.
Play 1: Reclassify Your Renovation Expenses
During a comprehensive study of an entire building, a cost segregation professional may identify 20% to 35% of the total depreciable basis as eligible for 5-, 7-, or 15-year depreciation. For renovations, that percentage may increase to 50% to 70% or more. The final percentage depends on the project scope, property type, and mix of components.
Why can renovations produce higher reclassification percentages? Renovation budgets often focus heavily on assets that qualify for accelerated depreciation. These assets may include flooring, interior finishes, specialized lighting, electrical systems, decorative elements, and landscaping.
Here are several examples of building components and their potential recovery periods:
- 5-year property: Carpeting, ornamental lighting, drapery, blinds, special-purpose electrical outlets, alarm systems, security systems, and demountable walls.
- 7-year property: Furniture, fixtures, signs, and certain types of ornamental lighting.
- 15-year property: Land improvements such as parking lots, sidewalks, landscaping, fences, exterior lighting, and retaining walls.
- 27.5- or 39-year property: Structural alterations, new roofs, and major HVAC work.
After the cost segregation professional identifies assets that qualify for shorter recovery periods, MACRS rules may allow the owner to claim bonus depreciation on those assets. Because 100% bonus depreciation has returned for qualified property acquired after January 19, 2025, qualifying assets with 5-, 7-, or 15-year recovery periods may receive a full first-year deduction.
Play 2: Use the Partial Asset Disposition Election
Renovations often involve removing existing building components. For example, you may remove carpeting, lighting, roofing, or HVAC equipment that still carries a depreciable basis on your books.
If you take no action, you may continue depreciating assets that no longer exist.
A Partial Asset Disposition, or PAD, election may allow you to deduct the remaining depreciable basis of qualifying building components that you remove or replace. Instead of continuing to depreciate the disposed asset over several years, you may recognize its remaining basis as a loss during the year of disposal.
Together, shorter recovery periods for new renovation costs and a PAD election for removed components can create a substantial tax benefit.
Example: A $500,000 Office Renovation
Suppose you spend $500,000 renovating a commercial office building.
Without a Cost Segregation Study
You depreciate the entire $500,000 over 39 years. That produces an annual depreciation deduction of approximately $12,800.
With a Cost Segregation Study and PAD Election
Assume the study identifies approximately 60% of the renovation costs, or $300,000, as eligible for shorter recovery periods:
- 5-year property: $150,000
- 7-year property: $75,000
- 15-year property: $75,000
- 39-year property: $200,000
With 100% bonus depreciation, you may deduct the entire $300,000 of qualifying short-life property during the first year.
Next, assume the replaced carpeting, lighting, and parking lot surfaces have a combined remaining basis of $80,000. A PAD election may allow you to deduct that $80,000 during the same year.
That creates a potential first-year deduction of approximately $380,000, compared with about $12,800 without the study.
At a 35% effective tax rate, a $380,000 deduction could generate approximately $133,000 in first-year tax savings. By comparison, a $12,800 deduction would produce approximately $4,480 in tax savings.
These figures serve only as estimates. Ask your CPA and cost segregation provider to calculate the potential savings for your specific property and tax situation.
Your Renovation Cost Segregation Checklist
Before beginning a renovation or tenant improvement project, take the following steps:
- Document the property before demolition. Photograph the assets and building components you plan to remove or replace.
- Maintain detailed cost records. Keep contractor invoices, change orders, schedules of values, and line-item payment applications.
- Preserve old construction documents. These records may help your cost segregation provider calculate the remaining basis of replaced assets.
- Contact a cost segregation firm early. Ideally, involve the firm before demolition begins.
- Confirm that the study meets IRS standards. The IRS Cost Segregation Audit Techniques Guide outlines 13 elements that a quality cost segregation study should include.
- Review bonus depreciation timing. Confirm when you acquired and placed each asset in service to determine whether it qualifies.
- Coordinate with your CPA regarding Form 3115. A retroactive cost segregation study may allow you to claim missed depreciation from previous years without amending prior tax returns.
Final Thoughts
Cost segregation for renovations represents one of the largest untapped tax opportunities in commercial real estate. Property owners often invest hundreds of thousands or even millions of dollars in upgrades. They then depreciate the entire investment over several decades, even though a significant portion may qualify for much faster deductions.
If you are planning a renovation, currently completing one, or recently finished a project, a cost segregation study may help you combine three valuable strategies:
- Higher reclassification percentages for renovation costs
- Partial Asset Disposition deductions for replaced components
- 100% bonus depreciation for qualifying short-life assets
Timing matters. The sooner you take action, the sooner you may unlock tax savings and improve your cash flow.
IRS Publication 946 and the IRS Cost Segregation Audit Techniques Guide recognize cost segregation as an engineering-based approach for identifying and classifying building components. Cost segregation is not a gimmick or loophole. It applies existing depreciation rules to the individual assets within a property.
Get a free benefit analysis. We will evaluate your renovation expenses, estimate the amount that may qualify for reclassification, and provide the information you need to decide whether to proceed. The analysis comes free of charge and carries no obligation.
Frequently Asked Questions
Can I perform a cost segregation study on a renovation I completed last year?
Yes. You can complete a cost segregation study retroactively. In many cases, Form 3115 allows you to claim previously missed accelerated depreciation without filing amended tax returns. Your CPA can determine whether this approach applies to your situation and handle the required filing.
What makes a renovation cost segregation study different from a complete building study?
Both studies use the same general methodology. However, the project scope and potential reclassification percentage may differ.
A complete building study may reclassify 20% to 35% of the depreciable basis. A renovation study may reclassify 50% to 70% or more because renovation expenses often concentrate on nonstructural components with shorter recovery periods.
What is a Partial Asset Disposition, and how does it apply to a renovation?
A PAD election may allow you to deduct the remaining undepreciated basis of qualifying components that you removed or replaced during a renovation. This election can prevent you from continuing to depreciate an asset that no longer exists.
Is 100% bonus depreciation available for renovation costs?
In some cases, yes. Certain renovation components may qualify for 5-, 7-, or 15-year recovery periods and bonus depreciation. Eligibility depends on several factors, including the acquisition date, placed-in-service date, asset classification, and applicable tax rules. Consult your cost segregation provider and CPA before claiming the deduction.
How should I select a cost segregation company for a renovation study?
Choose a company that follows the engineering-based method described in the IRS Cost Segregation Audit Techniques Guide. Ask whether the company:
- Conducts a physical site inspection
- Assists with Partial Asset Disposition elections
- Communicates directly with your CPA
- Produces a detailed cost reconciliation report
- Provides audit defense support
