Cost Segregation
Estimator
First-year bonus depreciation, before you pay for the study
Estimates what a cost segregation study unlocks: basis reclassified to 5/7/15-year property, 100% bonus depreciation under post-2025 rules, the first-year tax savings against straight-line, and whether the study fee pays for itself immediately.
See It In Action
Play with the calculator below. This is exactly what your visitors will see.
Cost Segregation Estimator
Estimate first-year bonus depreciation and tax savings from a cost seg study
First-Year Tax Savings
$53,964
Depreciation Detail
Bonus Deduction
$160,000
Year-1 Total (With Study)
$177,455
Year-1 (Straight-Line)
$23,273
Extra Deduction
$154,182
Study Economics
Net Benefit (Yr 1)
$48,964
Return per $1 of Study
10.79
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How It Works
Get your results in four simple steps
Enter the scenario
Fill in 7 plain-English inputs across 2 short sections. Sensible defaults get you a result immediately.
Read the verdict
Results update instantly: the headline figure, supporting stats, and clear pass/fail states where qualification applies.
Share or download
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Why This Calculator
Purpose-built features that give you the insights you actually need.
Property
The building being studied
Tax Situation
How the deduction converts to savings
How the Cost Segregation Estimator math works
Estimate first-year bonus depreciation and tax savings from a cost seg study
Industry Standards We Follow
- 27.5/39-year straight-line baselines
- 100% bonus depreciation (post-Jan-2025 placed-in-service)
Key Variables in Our Calculation
- depreciableBasisBuilding basis (land excluded)
- reclassifiedAmountBasis moved to 5/7/15-year property
- bonusDeductionImmediate bonus depreciation on the reclassified basis
- remainingBasisYear1Year-1 straight-line on the remaining long-life basis
- yearOneTotalDeductionTotal first-year depreciation with the study
- straightLineYear1First-year depreciation without a study
- additionalDeductionExtra first-year deduction the study unlocks
- firstYearTaxSavingsFirst-year cash tax savings from the study
Expert Insights
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Start from the defaults
Defaults reflect current market conditions; change only what you know about your scenario.
Stress-test the result
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Frequently Asked Questions
Everything you need to know about the Cost Segregation Estimator
Yes, for qualifying property placed in service after January 19, 2025, 100% bonus depreciation was restored. Reclassified 5/7/15-year property from a cost seg study qualifies.
Usually 20-35% of the building basis, depending on property type. The estimate defaults to 25%; a real engineering study gives the exact figure.
Who Uses This Calculator
Rental Property Owners
See the cash value of accelerating depreciation before engaging an engineer.
CPAs & Advisors
A quick screen for which client properties justify a study.
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