Cost Segregation Savings Calculator
Estimate tax savings from cost segregation studies on commercial and rental properties. Enter values for instant results with step-by-step formulas.
Reviewed for accuracy by Daniel Agrici, Founder & Lead Developer
Cost Segregation Savings Calculator
Calculator
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Formula: Year 1 Savings = (Accelerated Depreciation - Standard Depreciation) x Tax Rate
Worked example — Year 1 Additional Tax Savings: ~$83,000 | 5-Year Accelerated Savings: ~$148,000
Formula
Year 1 Savings = (Accelerated Depreciation - Standard Depreciation) x Tax Rate
Where Accelerated Depreciation includes bonus depreciation on reclassified assets plus MACRS depreciation on remaining components, and Standard Depreciation is the straight-line amount over 27.5 or 39 years. The difference multiplied by your marginal tax rate gives the additional first-year tax savings.
Worked Examples
Example 1: Commercial Office Building
Problem:A $2 million commercial office building with 80% depreciable basis. Cost segregation reclassifies 25% of the depreciable basis. Tax rate is 37%. Bonus depreciation is 60%.
Solution:Depreciable basis = $2,000,000 x 80% = $1,600,000 Segregated amount = $1,600,000 x 25% = $400,000 Standard annual depreciation = $1,600,000 / 39 = $41,026 Standard Year 1 tax savings = $41,026 x 37% = $15,180 Bonus depreciation = $400,000 x 60% = $240,000 (Year 1 deduction) Accelerated Year 1 deduction is significantly higher Year 1 tax savings difference exceeds $80,000
Result:Year 1 Additional Tax Savings: ~$83,000 | 5-Year Accelerated Savings: ~$148,000
Example 2: Apartment Complex
Problem:A $5 million apartment complex with 75% depreciable basis. Cost segregation reclassifies 35% at a 35% tax rate with 40% bonus depreciation.
Solution:Depreciable basis = $5,000,000 x 75% = $3,750,000 Segregated amount = $3,750,000 x 35% = $1,312,500 Standard depreciation (27.5 yr) = $3,750,000 / 27.5 = $136,364/yr Bonus on segregated = $1,312,500 x 40% = $525,000 (Year 1) Remaining segregated over 5-15 years Accelerated Year 1 deduction dramatically higher
Result:Year 1 Additional Tax Savings: ~$165,000 | Total Accelerated Benefit: ~$459,000
Frequently Asked Questions
What is a cost segregation study and how does it work?
A cost segregation study is a tax planning strategy that identifies and reclassifies personal property assets from real property to shorten the depreciation time for taxation purposes. When you purchase a commercial or rental property, the IRS typically requires you to depreciate the building over 27.5 years for residential or 39 years for commercial real estate. A cost segregation study breaks out components like electrical wiring, plumbing, carpeting, cabinetry, and landscaping into shorter depreciation categories of 5, 7, or 15 years. This accelerated depreciation creates significantly larger tax deductions in the early years of property ownership, improving cash flow and reducing your effective tax burden during the most capital-intensive period of your investment.
Who benefits most from cost segregation studies?
Cost segregation studies provide the greatest benefit to property owners with high taxable income and substantial real estate holdings. Commercial property owners, apartment building investors, medical and dental practice owners, restaurant and retail store owners, and hotel operators typically see the largest savings. Properties valued at $1 million or more generally produce enough tax savings to justify the study cost, which typically ranges from $5,000 to $15,000 depending on property complexity. Real estate investors who actively participate in their properties under IRS rules and have modified adjusted gross income under certain thresholds can use accelerated depreciation to offset ordinary income. Real estate professionals who spend more than 750 hours annually in real estate activities receive even more favorable treatment.
What percentage of a building can typically be reclassified?
The percentage of a building that can be reclassified through cost segregation varies based on property type, age, and construction methods, but generally ranges from 15 to 45 percent of the total depreciable basis. Restaurants and hotels tend to have the highest reclassification rates at 30 to 45 percent due to extensive specialized fixtures, equipment, and site improvements. Office buildings typically yield 15 to 25 percent reclassification. Retail spaces average 20 to 30 percent. Manufacturing facilities can reach 35 to 40 percent because of heavy equipment infrastructure. Multifamily residential properties usually see 20 to 30 percent reclassification. The actual results depend heavily on the specific construction details and how well the study engineer documents each component.
How does bonus depreciation affect cost segregation savings?
Bonus depreciation dramatically amplifies the benefits of cost segregation by allowing you to deduct a large percentage of reclassified asset costs in the first year rather than spreading them over 5, 7, or 15 years. Under the Tax Cuts and Jobs Act of 2017, bonus depreciation was set at 100 percent through 2022, then phases down by 20 percent each year. For 2025, bonus depreciation is 40 percent, meaning 40 percent of the reclassified personal property and land improvements can be deducted immediately. The remaining 60 percent follows the regular Modified Accelerated Cost Recovery System schedule. Even at reduced bonus depreciation rates, the combined effect with cost segregation creates substantially larger first-year deductions compared to standard straight-line depreciation over 39 years.
Can cost segregation be applied to properties purchased in prior years?
Yes, cost segregation studies can be performed on properties purchased in previous tax years through a process called a look-back study. The IRS allows taxpayers to claim the cumulative catch-up depreciation they missed in a single year by filing Form 3115, Application for Change in Accounting Method. This does not require amending prior tax returns and is considered an automatic change that the IRS generally approves without review. The catch-up deduction includes all the accelerated depreciation that would have been claimed from the original purchase date through the current tax year. This can result in a massive one-time deduction that significantly reduces taxable income. There is no statute of limitations on when you can perform a look-back study, making it valuable even for properties held for many years.
What are the risks or downsides of cost segregation?
While cost segregation offers significant tax advantages, there are important considerations to understand. First, accelerated depreciation reduces your tax basis in the property, which means a larger taxable gain when you sell. This gain may be subject to depreciation recapture at ordinary income rates up to 25 percent under Section 1250. Second, the study itself costs money, typically $5,000 to $15,000, and may not be cost-effective for smaller properties. Third, if you sell the property within a few years, the recapture taxes could exceed the benefits received. Fourth, an aggressive cost segregation study could trigger an IRS audit if the reclassification percentages are unusually high. Finally, passive activity loss rules may limit your ability to use the accelerated deductions if you do not qualify as a real estate professional.
How is depreciation recapture handled when selling a property after cost segregation?
When you sell a property that has undergone cost segregation, the IRS requires you to recapture the depreciation deductions previously claimed. Section 1245 property, which includes the personal property components reclassified through cost segregation, is subject to recapture at ordinary income tax rates up to 37 percent for the amount of gain attributable to depreciation. Section 1250 property, the remaining building structure, faces recapture at a maximum rate of 25 percent for the unrecaptured Section 1250 gain. However, many investors mitigate recapture through a 1031 like-kind exchange, which defers both capital gains and depreciation recapture taxes by rolling proceeds into a replacement property. Strategic planning around the timing of sales and exchanges can significantly reduce the net tax impact of recapture.
What types of property components are reclassified in a cost segregation study?
A cost segregation study reclassifies building components into four main categories based on their useful life and function. Five-year property includes carpeting, decorative millwork, accent lighting, certain electrical outlets and circuits dedicated to equipment, security systems, and specialized plumbing for equipment. Seven-year property covers office furniture, appliances, certain equipment foundations, and telecommunication wiring. Fifteen-year property encompasses land improvements such as parking lots, sidewalks, landscaping, fencing, signage, and exterior lighting. Site improvements like drainage systems, retention ponds, and utility connections also qualify for 15-year treatment. The study engineer physically inspects the property, reviews construction blueprints and invoices, and applies engineering-based analysis to assign each component to its proper asset class.
How much does a cost segregation study typically cost and what is the typical return on investment?
The cost of a professional cost segregation study generally ranges from $5,000 to $15,000 for properties valued between $500,000 and $5 million, with larger or more complex properties costing $15,000 to $25,000 or more. The return on investment is typically quite favorable, with most studies generating tax savings of 5 to 15 times the study fee in the first year alone. For example, a $1 million commercial property might cost $8,000 for the study but generate $50,000 to $80,000 in first-year tax savings depending on the property type and the owner tax bracket. Engineering-based studies conducted by qualified firms with both tax and construction expertise tend to hold up best under IRS scrutiny. Some firms offer preliminary feasibility analyses at no cost to determine whether a full study is worthwhile for your specific property.
Does cost segregation work for residential rental properties?
Yes, cost segregation works for residential rental properties, though the baseline depreciation period is already shorter at 27.5 years compared to 39 years for commercial properties. Multifamily apartment buildings, duplexes, and single-family rentals can all benefit from cost segregation studies. Apartment complexes with extensive common areas, fitness centers, pools, and landscaping tend to produce the highest reclassification percentages among residential properties. For individual rental homes, the study may only be cost-effective if the property value exceeds approximately $300,000 to $500,000, depending on the study fee. Residential property owners must also be mindful of passive activity loss limitations under Section 469, which can restrict the ability to use accelerated depreciation deductions against non-passive income unless the taxpayer qualifies as a real estate professional.
References
Reviewed for accuracy by Daniel Agrici, Founder & Lead Developer · Editorial policy
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