What is Cost Segregation Study?
A Cost Segregation Study is a detailed engineering-based analysis that identifies and reclassifies components of a property into shorter-lived asset categories for tax depreciation purposes. Instead of depreciating an entire building over 27.5 years (residential) or 39 years (commercial), a cost segregation study allows certain elements, such as carpeting, cabinetry, lighting, and land improvements – to be depreciated over 5, 7, or 15 years. This accelerates depreciation deductions, reducing taxable income and increasing cash flow in the early years of property ownership.
A cost segregation study begins with a thorough review of construction documents, blueprints, and invoices, followed by a site visit by qualified engineers or tax professionals. The study identifies and quantifies building components eligible for shorter depreciation lives under IRS guidelines. The results are compiled into a detailed report, which is then used to support accelerated depreciation deductions on the taxpayer’s return. This process can be facilitated by cost segregation study software or a cost segregation study calculator, but IRS scrutiny is highest when the study is not performed by experienced professionals.
Properties that are newly constructed, recently purchased, or significantly renovated are prime candidates for a cost segregation study real estate analysis. The greatest benefits are typically realized for properties with a cost basis of $500,000 or more, but even smaller properties can benefit if they have substantial personal property or land improvements. Office buildings, retail centers, hotels, industrial facilities, and multifamily complexes are especially well-suited. A cost segregation study residential rental property can also yield significant tax savings, particularly when the property includes extensive site improvements or high-value interior finishes.
The interplay between cost segregation, Bonus Depreciation, and Section 179 expensing is crucial for maximizing tax benefits. Under the One Big Beautiful Bill Act (OBBBA), 100% bonus depreciation is available for qualified property acquired after January 19, 2025. This means that any portion of a building’s cost basis reclassified into 5-, 7-, or 15-year property through a cost segregation study can be fully expensed in the first year. Section 179 allows immediate expensing of certain assets, subject to annual limits. Together, these provisions can dramatically Boost Cash Flow by front-loading depreciation deductions, but careful planning is needed to avoid exceeding income limitations or triggering recapture rules.
Key Benefits:
Risks and Compliance Considerations:
Notice 2026-16, issued by the Internal Revenue Service, introduces a major change allowing up to 100% expensing of qualifying nonresidential real property used in a Qualified Production Activity when it meets the definition of Qualified Production Property (QPP). However, only the portion of a property that is an “integral part” of production qualifies, excluding areas used for offices, administration, sales, or other non-production functions. This creates a compliance challenge for mixed-use properties, requiring taxpayers to allocate costs between eligible and ineligible portions using reasonable methods. As a result, Cost Segregation Study has become especially important, as it provides detailed, supportable allocation data that helps maximize deductions and withstand IRS scrutiny.
What is the purpose of a cost segregation study?
A cost segregation study aims to identify and reclassify building components into shorter-lived asset categories, allowing property owners to accelerate depreciation deductions, reduce taxable income, and increase cash flow in the early years of ownership.
Which types of real estate benefit most from cost segregation?
Commercial properties such as office buildings, retail centers, hotels, industrial facilities, and multifamily complexes benefit most. Properties with significant site improvements or specialized interior finishes are especially good candidates.
How does a cost segregation study interact with bonus depreciation and recent law changes like OBBBA?
A cost segregation study enables more of a property’s cost to qualify for 100% bonus depreciation under OBBBA, allowing immediate expensing of reclassified assets. This maximizes upfront tax savings and cash flow for eligible property owners.
When should investors consider a cost segregation study?
Investors should consider a study when acquiring, constructing, or renovating a property, ideally in the same tax year as the event. However, a study can also be performed retroactively using Form 3115 to claim missed depreciation.
What are the main risks of cost segregation?
Risks include potential IRS challenges if the study lacks proper documentation, the possibility of depreciation recapture upon sale, and limited benefit if the investor cannot use the losses due to passive activity rules. Addressing these Real Estate Tax and Accounting Issues with qualified professionals is essential to ensure compliance and maximize benefits.
Can I do my own cost segregation study?
While technically possible, self-prepared studies are rarely recommended due to the complexity of IRS rules and the need for detailed engineering analysis. Using experienced professionals or specialized cost segregation study software increases accuracy and audit defensibility.
For more than four decades, Bennett Thrasher has provided businesses and individuals with strategic business guidance and solutions through professional tax, audit, advisory, and business process outsourcing services. Contact Duwayne Sibley, Cost Segregation Director in Bennett Thrasher’s Tax Credits and Incentives practice, or call us at 770.396.2200.
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