Cost Segregation for Real Estate Investors

When you buy or build an investment property, the tax rules generally treat the building as a single asset. Residential rental property is depreciated over 27.5 years and nonresidential real property over 39 years, both on a straight-line basis. That's slow, especially if you expect to renovate, refinance or sell within ten years.

A cost segregation study looks at the property in more detail. Instead of one building, it identifies the separate components that the tax law allows you to depreciate faster.

What a study does

An engineering-based cost segregation study divides the purchase or construction cost into categories, typically:

• 5- and 7-year property, such as certain flooring, cabinetry, specialty electrical and fixtures that serve the business use rather than the building itself.
• 15-year land improvements, such as parking lots, sidewalks, landscaping, fencing and site lighting.
• The building structure, still depreciated over 27.5 or 39 years.
• Land, which isn't depreciated at all.

The IRS publishes a Cost Segregation Audit Techniques Guide that describes what it expects from a quality study. A well-documented study by qualified professionals is far easier to defend than a rough estimate.

How bonus depreciation multiplies the effect

The 2025 tax law made 100% bonus depreciation permanent for qualified property acquired after January 19, 2025. Property with a recovery period of 20 years or less, including the 5-, 7- and 15-year components a study identifies, can generally qualify. Qualified improvement property, meaning certain interior improvements to nonresidential buildings, is also 15-year property.

The result can be a large first-year deduction instead of a small one spread over decades. For properties bought in earlier years, a look-back study can often claim depreciation you missed through an accounting method change in the current year, without amending prior returns.

When it's likely worth it

• Higher-value properties, where the reclassified amount is large compared with the study's fee.
• Recent purchases, new construction or major renovations.
• Owners who expect to hold the property for several years.
• Investors who can actually use the deductions this year (see the passive loss rules below).

For smaller properties, the fee can outweigh the benefit. A preliminary estimate before ordering a full study helps you decide.

Rules that limit the benefit

• Passive activity rules. For most investors, rental losses are passive and can only offset passive income. Qualifying as a real estate professional, or certain short-term rental situations, can change that, but the tests are strict and need good records.
• Depreciation recapture. When you sell, some of the depreciation you claimed can be taxed as ordinary income, and the rest at rates that can be higher than long-term capital gains rates.
• 1031 exchanges. Exchanging into a replacement property can defer gain, but reclassified components need careful planning in an exchange.
• State rules. Texas has no personal income tax, so investors here don't face the state depreciation add-backs that some other states require.

Questions to ask before you order a study

• What is the total depreciable basis, excluding land?
• When was the property placed in service, and has a study been done before?
• How long do I plan to hold it?
• Can I use the losses this year, or will they be suspended?
• How would a sale or exchange affect recapture?

Cost segregation is a timing strategy, not a permanent tax cut. Used well, it puts cash back into your portfolio years earlier. We can run the numbers with you and coordinate with a qualified engineering firm.

General information, not tax or legal advice. Consult a CPA about your situation.