Cost Segregation Studies

What Is a Cost Segregation Study?

A cost segregation study is an engineering-based analysis that identifies and reclassifies components of a building from the standard depreciation schedule into shorter recovery periods. Under the Modified Accelerated Cost Recovery System (MACRS), residential rental property is depreciated over 27.5 years and commercial property over 39 years. However, many building components qualify for 5-year, 7-year, or 15-year recovery periods when properly identified and documented.

Components that are typically reclassified include cabinetry, countertops, flooring, specialized electrical systems, plumbing fixtures, decorative lighting, landscaping, parking lots, sidewalks, fencing, and site drainage. These items are separated from the structural building shell and assigned to their correct, shorter MACRS class life.

How Bonus Depreciation Amplifies the Benefit

Under the One Big Beautiful Bill Act (OBBBA), 100% bonus depreciation has been made permanent for qualifying property. This means that all building components reclassified into 5-year, 7-year, or 15-year categories through a cost segregation study can be fully deducted in the first year the property is placed in service. For a typical residential rental property, 20% to 40% of the building's cost may be eligible for reclassification, generating $50,000 to $150,000 or more in first-year tax deductions.

Who Benefits from Cost Segregation?

Cost segregation studies are most valuable for real estate investors and property owners who have sufficient income to absorb large depreciation deductions. The service is particularly beneficial for:

• Short-term rental (STR) owners who materially participate and can use rental losses to offset W-2 or business income
• Real estate professionals (as defined under IRC Section 469) who can deduct rental losses against active income
• Business owners who use property in their trade or business
• Investors who have acquired properties in prior years and want to claim catch-up depreciation via Form 3115
• Owners of commercial buildings including office spaces, retail centers, and industrial facilities

How It Works

The AE Tax Advisors cost segregation process follows a structured methodology:

1. Property information gathering — The firm collects closing statements, appraisals, property photos, floor plans, and improvement records
2. Component-level analysis — Each building element is identified, classified, and assigned to the appropriate MACRS recovery period based on IRS guidance and engineering standards
3. Report preparation — The completed study includes a detailed component schedule, cost allocation summary, photographic documentation, and supporting calculations
4. Tax return integration — The depreciation schedule is provided to the client's tax preparer for inclusion on the appropriate tax forms, including Form 4562 (Depreciation and Amortization)

Lookback Studies for Existing Properties

Property owners who acquired buildings in prior years and have been using standard straight-line depreciation can still benefit from a cost segregation study. Through IRS Form 3115 (Application for Change in Accounting Method), the catch-up depreciation for all prior years is claimed as a single adjustment in the current tax year. This lookback method does not require amending prior returns and can produce a one-time deduction exceeding $100,000 for properties that have been owned for several years.

What Is Included

• Complete engineering-based component analysis
• IRS-compliant study report with audit-ready documentation
• Photographic evidence and component identification
• Depreciation schedule in tax-preparer-ready format
• Form 3115 preparation for lookback studies
• Coordination with your CPA or tax preparer for filing