Cost Segregation Calculator: Estimate Your Savings

The cost segregation calculator applies industry-standard reclassification percentages to your property based on type and characteristics. It estimates how much of your building basis can be moved from 27.5-year or 39-year depreciation into 5-year, 7-year, and 15-year property classes.

The calculator then compares two depreciation scenarios: traditional straight-line depreciation versus accelerated depreciation with cost segregation. It calculates annual deductions under each method, applies your tax bracket to determine tax savings, and projects cumulative benefits over 5, 10, and 15-year periods.

Bonus depreciation rules are applied automatically based on the year placed in service. For 2026 properties, the calculator applies 60% bonus depreciation to eligible reclassified assets. For 2027 and beyond, it adjusts for the phase-down schedule (40% in 2027, 20% in 2028, 0% in 2029+).

The calculator estimates the dollar amount of building components that can be reclassified into shorter depreciation lives. This reclassified amount typically ranges from 15% to 50% of the depreciable building basis, depending on property type and construction.

It projects first-year tax savings by calculating the difference between accelerated deductions and traditional depreciation, then multiplying by your marginal tax rate. Multi-year savings estimates show cumulative benefits over 5, 10, and 15-year holding periods, accounting for the time value of money.

The calculator also estimates return on investment by comparing projected tax savings against typical cost segregation study fees. Most studies cost $5,000 to $15,000, and the calculator shows how many years of savings are required to recover the study cost.

Property Purchase Price or Cost Basis: The total amount paid for the property, including acquisition costs but excluding land value. If you know your depreciable basis, use that figure. If not, the calculator typically assumes 80% of purchase price is attributable to the building and 20% to land.

Property Type: The classification determines which reclassification percentages the calculator applies. Retail and restaurant properties have higher percentages (30-50%) due to extensive tenant improvements and specialized equipment. Office buildings typically have lower percentages (15-25%) with fewer specialty components.

Federal Tax Bracket: Your marginal federal income tax rate determines the value of depreciation deductions. Higher brackets produce more savings from the same deduction amount. The calculator uses this rate to convert deductions into actual tax savings dollars.

Year Placed in Service: This determines bonus depreciation availability and phase-down percentage. Properties placed in service in 2026 receive 60% bonus depreciation, while 2027 properties receive 40%. This input materially affects first-year savings estimates.

An investor purchases a $3,000,000 multifamily property in March 2026. After accounting for $600,000 in land value, the depreciable building basis is $2,400,000. The investor is in the 37% federal tax bracket.

Using the cost segregation calculator, the investor enters these inputs and selects "Multifamily" as the property type. The calculator estimates that 25% of the building basis ($600,000) can be reclassified into shorter-life property.

Traditional Depreciation (27.5 years): Annual deduction = $2,400,000 ÷ 27.5 = $87,273. First-year tax savings = $87,273 × 37% = $32,291.

With Cost Segregation and 60% Bonus Depreciation: The $600,000 reclassified amount receives 60% bonus depreciation in year one ($360,000 immediate deduction). The remaining $240,000 depreciates over 5, 7, and 15-year schedules. The building portion ($1,800,000) continues on the 27.5-year schedule.

First-year total deduction = $360,000 (bonus) + $48,000 (MACRS on remaining reclassified) + $65,455 (building portion) = $473,455. First-year tax savings = $473,455 × 37% = $175,178. Incremental savings vs traditional = $175,178 - $32,291 = $142,887.

The calculator estimates a typical study cost of $8,000 for this property. ROI = $142,887 ÷ $8,000 = 17.9:1 in the first year alone. Over five years, cumulative incremental savings total approximately $210,000.

The cost segregation calculator is most valuable during property acquisition due diligence, when investors are underwriting deals and need to model tax benefits in their cash flow projections. Knowing the estimated savings helps determine whether cost segregation should be factored into return assumptions.

Calculators are useful when prioritizing which properties in a portfolio should receive formal studies first. Investors can run estimates on multiple properties and rank them by estimated ROI or savings magnitude to guide decision-making.

The tool helps investors evaluate whether study fees are justified for smaller or lower-value properties. If the calculator shows minimal savings relative to typical fees, it may indicate the property is not a strong candidate for cost segregation.

Cost segregation calculators use average or typical reclassification percentages based on property type. Actual percentages depend on specific construction details, finishes, systems, and site improvements that only detailed engineering analysis can identify. Your property may have more or less reclassification potential than the calculator suggests.

Calculators do not account for passive activity loss limitations, alternative minimum tax, state tax conformity issues, or entity-specific restrictions. These factors can materially reduce or defer the usability of depreciation deductions, affecting real-world savings.

Results are planning estimates only and do not constitute tax advice or tax filing positions. Actual savings require a qualified cost segregation study performed by licensed engineers and reviewed by your CPA. Always consult tax professionals before making depreciation elections.

• Tax Strategy Tools Overview
• Bonus Depreciation Calculator
• Property Eligibility Checker
• Cost Segregation Comparison Tool