The Basics: What Is a Cost Segregation Study?

A cost segregation study is a detailed engineering-based analysis that allows property owners to accelerate depreciation deductions by identifying and separating the personal property components of a building from its structural elements. In simple terms, it reclassifies assets into shorter recovery periods (typically 5, 7, or 15 years) rather than the standard 27.5 or 39-year schedule for residential and commercial real estate.

This means you can write off more of the building’s value sooner—significantly reducing your taxable income in the early years of ownership.

Why It Matters

Here’s the practical benefit: front-loading depreciation improves cash flow. Instead of waiting decades to recover the cost of your property through standard depreciation, a cost segregation study allows you to realize those deductions now.

For example, a $5 million industrial building might generate $1 million or more in accelerated depreciation over the first few years—savings that can be reinvested back into your business, used to acquire more property, or simply held for liquidity.

Benefits for Renewable Energy Operators Too

For renewable energy property owners—especially those in solar, wind, or storage development—cost segregation plays a key role in maximizing the value of the Investment Tax Credit (ITC).

The ITC allows project owners to claim a federal tax credit worth a percentage of the eligible basis of their energy system (currently 30% for most projects under the Inflation Reduction Act). But what many don’t realize is this: your depreciable basis is reduced by 50% of the ITC, which means every dollar you can shift into shorter-life property matters even more.

Cost segregation studies help you define and document the personal property portions—like inverters, racking, wiring, transformers, and even some land improvements—that qualify for accelerated depreciation, typically using MACRS 5-year schedules. When combined with bonus depreciation, the upfront tax benefits can be significant.

What Assets Can Be Reclassified?

Through a cost segregation study, engineers and tax professionals identify components such as:

  • Carpet and flooring
  • Specialty lighting and finishes
  • Certain electrical and mechanical systems
  • Site improvements (parking lots, sidewalks, landscaping)
  • For renewables: transformers, switchgear, conduit, and mounting systems

These aren’t considered part of the building’s core structure and are eligible for shorter depreciation lives.

Who Should Consider a Cost Segregation Study?

Cost segregation is most beneficial for:

  • Owners of newly constructed buildings
  • Buyers of existing commercial property
  • Renovators or those making major capital improvements
  • Renewable energy developers using the ITC

Generally, if your project is over $500,000, there’s likely meaningful value in a study. And for energy projects, the savings often show up in year one.

At KE Andrews, we’ve conducted cost segregation studies on properties of all sizes—from single-tenant real estate to utility-scale solar farms. Our team blends engineering and tax expertise to produce IRS-aligned studies designed for defensibility and maximum benefit.

We’ve helped renewable developers across the U.S. optimize both depreciation and ITC allocations, making sure they don’t leave value on the table.