Quick Answer
A cost segregation study is an engineering-based analysis that identifies and reclassifies building components to accelerate depreciation. Instead of depreciating a commercial building over 39 years, owners can depreciate certain components over 5, 7, or 15 years, potentially saving $50,000-$200,000+ in taxes for properties worth $1 million or more.
Best Answer
Robert Kim, CPA
Best for owners of commercial buildings, office complexes, retail centers, or industrial properties worth $1M+
What is a cost segregation study and how does it work?
A cost segregation study is a detailed engineering analysis that identifies building components that can be depreciated faster than the standard building depreciation schedule. According to IRS Revenue Procedure 87-56, commercial buildings must be depreciated over 39 years using the straight-line method. However, many building components can legally be classified as 5-year, 7-year, or 15-year property.
The study involves having qualified engineers and tax professionals examine your property's construction costs, blueprints, and actual building components to identify items that qualify for accelerated depreciation under IRC Section 168.
Example: $2 million office building cost segregation
Let's say you purchased a $2 million office building. Without cost segregation:
With a cost segregation study identifying $600,000 in components eligible for faster depreciation:
Tax impact:
When does a cost segregation study make sense?
Property value thresholds:
Best property types:
Key factors that maximize study benefits
What you should do
If you own commercial real estate worth $1M+ purchased within the last 3-4 years, calculate your potential savings. The study typically costs 0.5-1.5% of building value but can generate tax savings of 5-15% of the building's cost basis.
[Use our refund estimator]() to calculate potential tax savings from a cost segregation study based on your property value and tax bracket.
Key takeaway: Cost segregation studies can generate $50,000-$300,000+ in tax savings for commercial properties over $1M by accelerating depreciation on 20-40% of the building's components from 39 years to 5-15 years.
*Sources: [IRS Revenue Procedure 87-56](https://www.irs.gov/pub/irs-irbs/irb04-31.pdf), [IRC Section 168](https://www.law.cornell.edu/uscode/text/26/168)*
Key Takeaway: Cost segregation studies can accelerate depreciation on 20-40% of a commercial building's components, generating $50,000-$300,000+ in tax savings for properties over $1M.
Cost segregation study ROI by property value and type
| Property Type | Property Value | Typical Study Cost | First-Year Tax Savings | ROI |
|---|---|---|---|---|
| Commercial Office | $1M | $15,000 | $12,000-$20,000 | 80%-133% |
| Commercial Office | $2M | $20,000 | $30,000-$50,000 | 150%-250% |
| Commercial Office | $5M+ | $35,000 | $75,000-$150,000 | 214%-429% |
| Residential Rental | $500K | $8,000 | $3,000-$6,000 | 38%-75% |
| Residential Rental | $1M | $12,000 | $8,000-$15,000 | 67%-125% |
More Perspectives
Robert Kim, CPA
Best for owners of residential rental properties, small apartment buildings, or mixed-use properties
Cost segregation for rental properties
While cost segregation is most powerful for commercial properties, residential rental property owners can benefit too, especially with properties over $500,000 or those with significant improvements.
Residential vs. commercial differences:
Example: $800,000 apartment complex renovation
You renovated a 12-unit apartment building for $300,000. Components identified for acceleration:
Tax impact:
When it makes sense for residential:
Key takeaway: Residential rental properties over $500K or with major renovations can benefit from cost segregation, typically saving $3,000-$15,000 in first-year taxes.
Key Takeaway: Residential rental properties over $500K or with major renovations can benefit from cost segregation, typically saving $3,000-$15,000 in first-year taxes.
Robert Kim, CPA
Best for investors with portfolios of multiple commercial or residential properties seeking tax optimization
Portfolio-wide cost segregation strategy
For high-net-worth individuals with multiple properties, cost segregation becomes part of a comprehensive tax strategy that can defer hundreds of thousands in taxes while improving cash flow across the portfolio.
Strategic considerations:
Portfolio example: $10M in commercial real estate
Assuming four properties worth $2.5M each, with studies identifying 25% eligible for acceleration:
Advanced strategies:
Risk management:
Key takeaway: High-net-worth investors with $5M+ in commercial real estate can defer $100K-$500K+ annually in taxes through strategic cost segregation across their portfolio.
Key Takeaway: High-net-worth investors with $5M+ in commercial real estate can defer $100K-$500K+ annually in taxes through strategic cost segregation across their portfolio.
Sources
- IRS Revenue Procedure 87-56 — Uniform Capitalization Rules for Real Property
- IRC Section 168 — Accelerated Cost Recovery System (MACRS)
- IRS Publication 946 — How to Depreciate Property
Related Questions
Reviewed by Robert Kim, CPA on February 28, 2026
This content is for educational purposes only and is not a substitute for professional tax advice. Consult a qualified tax professional for advice specific to your situation.