Most commercial property owners are depreciating too slowly. See what you could recover.
Cost segregation is an IRS-approved tax strategy that accelerates depreciation deductions on commercial real estate. Instead of spreading the entire depreciable basis of your building over 39 years (or 27.5 years for residential rental property), a cost segregation study identifies components that can be reclassified into shorter depreciation schedules of 5, 7, or 15 years.
These reclassified components typically include items like carpeting, decorative lighting, certain electrical systems, plumbing fixtures, landscaping, parking lots, and specialized equipment that is embedded within the structure. The result is significantly larger depreciation deductions in the early years of ownership, which directly reduces your taxable income.
Cost segregation is available to any taxpayer who owns, constructs, renovates, or acquires commercial real estate or residential rental property. It applies to properties already in service as well as new acquisitions. If you have been depreciating a building under the standard schedule for years, a "look-back" study can capture the missed accelerated depreciation through a catch-up deduction in the current tax year without amending prior returns.
A cost segregation study is conducted by a team of engineers and tax professionals who physically inspect the property and review construction documents. They identify every component of the building and classify each one according to IRS guidelines into the appropriate asset class.
The IRS allows buildings to be broken down into four primary asset categories:
The engineering team assigns a cost to each component using detailed construction cost data, contractor invoices, and industry databases. The total reclassified amount typically ranges from 15% to 35% of the depreciable basis, depending on the property type. Restaurants and hotels tend to have the highest reclassification rates because of their extensive personal property and land improvement components.
Once assets are reclassified into shorter recovery periods, they may also qualify for bonus depreciation. Under the One Big Beautiful Bill Act (OBBBA), 100% bonus depreciation has been restored for qualified property placed in service in 2025 and beyond. This means the entire reclassified amount can be deducted in a single year rather than spread over 5, 7, or 15 years.
For properties placed in service during the phase-down period prior to the OBBBA, the bonus depreciation rate was 80% in 2023 and 60% in 2024. Properties placed in service before 2020 generally do not qualify for bonus depreciation on a catch-up basis, though they can still benefit from the accelerated depreciation schedules.
Cost segregation delivers the most significant tax savings for property owners who have substantial taxable income to offset. The higher your marginal tax rate, the more each dollar of accelerated depreciation is worth in real tax savings.
As a general rule, cost segregation becomes financially compelling for properties valued at $500,000 or more. The study fee (typically $5,000 to $15,000 depending on property size and complexity) is itself tax-deductible, and the return on investment is commonly 10:1 or higher.
The One Big Beautiful Bill Act restored 100% bonus depreciation for qualified property placed in service starting in 2025. This reverses the phase-down schedule that had been reducing bonus depreciation by 20% per year since 2023.
Under the restored provision, property owners can deduct the full reclassified amount in the year the property is placed in service. For a $2 million office building with a 22% reclassification rate, that translates to a $352,000 first-year deduction on the reclassified assets alone, compared to approximately $9,000 per year under standard 39-year depreciation.
Key qualifications for bonus depreciation:
For properties placed in service during the phase-down years (2023 at 80%, 2024 at 60%), the remaining basis after bonus depreciation is recovered over the applicable recovery period using MACRS depreciation.
The difference between cost segregation and standard depreciation is not whether you depreciate your property. Both methods recover the full depreciable basis over time. The difference is timing. Cost segregation front-loads the deductions into the early years of ownership.
| Factor | Standard Depreciation | With Cost Segregation |
|---|---|---|
| Recovery Period | 39 years (commercial) | 5, 7, 15, and 39 years |
| Year 1 Deduction ($2M building) | ~$41,000 | $300,000+ |
| Bonus Depreciation | Not applicable | 100% on reclassified assets |
| Cash Flow Impact (Year 1) | Minimal | Significant tax deferral |
| Total Depreciation | Same over building life | Same over building life |
| Professional Study Required | No | Yes (engineering-based) |
| IRS Audit Risk | Low | Low (when properly documented) |
The critical insight is that cost segregation does not create new deductions. It accelerates existing ones. The time value of money means that taking a $300,000 deduction today is significantly more valuable than taking $41,000 per year for 39 years, even though the nominal total is the same. The present value of accelerated deductions can be 30-50% higher than straight-line depreciation.
Crane Financial partners with licensed engineers and IRS-compliant cost segregation firms to deliver studies that hold up under scrutiny. We handle the coordination between your CPA, the engineering team, and the IRS filing process so you can focus on your business.
Every study we deliver follows the IRS Audit Technique Guide standards and includes a detailed engineering report, asset classification schedule, and implementation instructions for your tax preparer. Our team has helped recover over $74 million in overpaid taxes across 600+ businesses.
If the numbers make sense, we'll prepare a formal proposal with a fixed fee and expected timeline.
Tell us about your business and we'll identify every savings opportunity available to you.