What is a Cost Segregation Study and Should Real Estate Investors Consider One?
Cost segregation studies may help real estate investors accelerate depreciation, increase early tax deductions, and improve cash flow. Learn how they work, who benefits most, and key considerations including bonus depreciation and recapture.
By Kendall Maccagnan, CPA, CFP® and Financial Advisor in Tampa, Florida
Key Takeaways
Cost segregation studies may allow certain building components to be depreciated over shorter recovery periods, accelerating tax deductions.
Larger upfront depreciation deductions may improve short term cash flow for real estate investors.
Under recent tax law changes the impact of cost segregation may be more significant with the restoration of 100% bonus depreciation.
Depreciation recapture, passive activity limitations, and study quality are important considerations before implementing this strategy.
Introduction
A cost segregation study is a tax strategy commonly used by real estate investors to accelerate depreciation and potentially improve short term cash flow. While real estate is typically depreciated over long recovery periods, certain components within a property may qualify for shorter depreciable lives which creates an opportunity to shift deductions into earlier years.
With recent tax law changes, including updates under the One Big Beautiful Bill Act (OBBBA), cost segregation has become an even more relevant planning consideration for investors acquiring or improving property. However, like many tax strategies, the benefits and trade offs can vary depending on the investor’s specific situation, making it important to understand how the strategy works before applying it.
Cost Segregation Studies Explained: How Real Estate Investors Can Accelerate Depreciation and Improve Cash Flow
What is a cost segregation study?
When a real estate investor purchases or constructs a building, the IRS generally requires the building portion of a property to be depreciated over 39 years for commercial real estate or 27.5 years for residential rental property. Certain assets inside a building like cabinetry, electrical, appliances, or lighting for example may qualify for much shorter depreciation periods.
A cost segregation study is an analysis that identifies and reclassifies these shorter lived components so they can be depreciated more quickly. Shorter recovery periods mean larger depreciation deductions in earlier tax years which may reduce taxable income and improve cash flow for an investor.
How does a cost segregation study work?
An investor would typically work with engineers, construction experts, and CPAs to conduct a cost segregation study. These professionals review construction drawings, contractor invoices, and other cost records to identify assets that qualify for shorter depreciation periods. The results are documented in a cost segregation report that details the methodology, asset classifications, and cost allocations which forms the substantiation needed to support the accelerated depreciation deductions on the investor's tax return. As a result of a cost segregation study, building components are commonly reclassified from the standard 27.5 or 39 year depreciation schedule into shorter lived asset categories of 5, 7 or 15 years.
How bonus depreciation under the OBBBA makes cost segregation more powerful in 2025 and beyond?
Under the One Big Beautiful Bill Act (OBBBA) qualifying property acquired and placed in service after January 19, 2025 is eligible once again for 100% bonus depreciation. For investors, this means that assets identified through cost segregation studies may be fully expensed in the year they are placed in service rather than depreciated over their standard recovery periods identified in the study.
To understand why this matters, consider the progression. Without a cost segregation study an investor depreciates the entire building and its components over 27.5 years for residential rental property or 39 years for commercial real estate. By conducting a cost segregation study eligible building components are reclassified into shorter recovery periods of 5, 7, or 15 years which accelerates depreciation deductions. The OBBBA takes this a step further by allowing investors to deduct 100% of the cost of qualifying assets in year one.
The bottom line is that shorter recovery periods generally translate to larger depreciation deductions in earlier years, improving cash flow for investors.
Who typically benefits most from cost segregation studies and when do they need to be done?
Studies can be done at any time during the holding period of the property. A cost segregation study can generally also be completed anytime before a tax return is filed (including extensions) and the study does not need to be finished by December 31 to apply it to that year's taxes.
Generally the higher the property value and the greater the value of its building components, the more meaningful the potential benefit of a cost segregation study. Conducting a study shortly after purchase, construction, or the completion of a renovation may maximize the benefit since the assets are newer and more depreciable life remains.
However, an investor is not limited to conducting a study immediately after purchase. A cost segregation study can be performed at any point during the asset's life. For properties already placed in service, it may still be possible to capture previously unclaimed depreciation through a change in accounting method, which generally involves filing Form 3115. This process can be complex and the rules are specific so consulting a qualified tax advisor may be recommended before pursuing this approach.
What are some potential risks and considerations of a cost segregation study?
Depreciation recapture
One of the most significant considerations is depreciation recapture upon sale. When assets identified through a cost segregation study are eventually sold, the IRS requires previously claimed depreciation to be recaptured as taxable income. For the shorter lived personal property components typically reclassified through cost segregation studies, depreciation is generally recaptured as ordinary income at the time of sale. Whether the accelerated deductions outweigh the recapture tax upon sale depends on an investor's specific holding period, tax situation, and exit strategy making it an important planning consideration. Strategies such as a 1031 exchange may allow investors to defer recapture, though each situation is different and investors may benefit from discussing their individual circumstances with a qualified tax advisor.
Passive activity rules
For investors who do not qualify as real estate professional status (REPS), depreciation deductions generated through cost segregation may be limited by the passive activity rules. Large depreciation deductions that create a paper loss may not be immediately deductible against ordinary income if the investor's rental activity is considered passive. These deductions are not lost permanently but may be suspended and carried forward until the investor has passive income to offset them or disposes of the property. Investors should evaluate their specific tax situation with a qualified advisor before relying on cost segregation deductions to offset active income.
Quality of the study
Cost segregation studies may vary widely in terms of methodology, documentation, depth, and the expertise of the preparer. Working with qualified engineers and experienced tax professionals helps ensure the study meets IRS standards.
Is a Cost Segregation Study Right for You?
A cost segregation study may be worth considering if:
You recently purchased, constructed, or renovated an investment property
The property has a relatively high purchase price or significant building component value
You are looking to increase depreciation deductions in the early years of ownership
You expect to have sufficient taxable income to benefit from accelerated deductions
You plan to hold the property long enough for the timing benefits to be meaningful
You are able to take advantage of current bonus depreciation rules for qualifying assets
A cost segregation study may be less beneficial if:
The property value is relatively low, making the cost of the study less cost effective
Depreciation deductions would be limited by passive activity rules
You expect to sell the property in the near term, increasing the impact of depreciation recapture
You do not have sufficient taxable income to utilize the accelerated deductions
Every investor's situation is different. Whether a cost segregation study makes sense may depend on your property type, income level, tax situation, and long term investment strategy. A qualified CPA or financial advisor can help you evaluate whether this strategy is appropriate for your specific circumstances.
This content is provided for educational and informational purposes only and should not be construed as investment, tax, or legal advice. It is not intended as a solicitation or offer to provide advisory services in any jurisdiction where Off The Bay Wealth, LLC is not properly registered or otherwise permitted to operate. Information presented is based on sources believed to be reliable; however, accuracy and completeness are not guaranteed. This material is not intended to be a comprehensive analysis of all topics discussed. IRS provisions are subject to ongoing guidance and regulatory updates. Any financial decisions should be made in consideration of your individual circumstances, including your goals, risk tolerance, and time horizon. Investing involves risk, including the potential loss of principal.
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