Free Cost Segregation Calculator
Get instant cost segregation estimates with AI-assisted engineering analysis. Enter your property address to explore potential tax savings in 30-60 seconds and adjust your property assumptions.
Enter the full US street address, then select a suggestion or search to verify it.
Prefer to see a real engineering study? Explore the 64-page sample.
Built by certified engineers and CPAs, with experience from 1,000+ studies and over $1 billion in analyzed real estate. Explore the Assumptions for 45 property types (2026.1.0), maintained by Matthew Gigantelli, ASCSP M009-25.
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↑ Example calculator output. Click "Edit values" to adjust property assumptions and see instant recalculation
Explore your property before choosing a study
Adjust purchase cost, land value, and property type in your report to compare scenarios and export your estimate. Ready for filing documentation? Request a custom engineer proposal or learn how the calculator works.
See the work behind a full study
64 pages and 125 asset line items documented to IRS Audit Techniques Guide standards. Your calculator result is the starting estimate.
Look Inside a Real Engineer Study →See how the numbers come together
Two illustrative calculator scenarios showing how cost segregation accelerates year-one deductions.
$750K Airbnb / short-term rental
Land $150,000 · Depreciable basis $600,000
$3.8M 12-unit multifamily
Land $760,000 · Depreciable basis $3,040,000
Assumes qualifying property acquired and placed in service after January 19, 2025 with 100% federal bonus depreciation and a 37% planning rate (before study fees; short-term rental 39-year treatment and usable deductions depend on stay length, material participation, loss limits, and state rules). See the method and all four examples.
Have Our Engineers Prepare a Custom Proposal for You
Prefer to have an engineer run the numbers for you instead of using the calculator or picking a calendar slot right now? Submit your property address and contact details below, and we’ll prepare a custom benefit estimate and flat-fee study quote (most residential studies total $1,200 to $1,600 for a 30x to 70x+ first-year ROI) and follow up with your proposal.
Speak with our team of certified cost segregation engineers and CPAs about your property. Our engineering team, led by Matthew Gigantelli (ASCSP Member M009-25), can review your property assumptions and explain whether a paid engineering study makes sense for you.
Frequently Asked Questions
When is cost segregation a bad idea?
Cost segregation can be a strong fit when the tax savings you can use exceed the study cost. Your holding plan also matters. To find out, compare your building's cost excluding land, the study quote and your ability to use the deductions. Smaller properties, limited usable deductions or an early sale can change the value. Start with an estimate, then review the numbers with our team before choosing a study.
Can cost segregation reduce taxes on my W-2 income?
Yes, in qualifying situations. These can include real estate professional status with material participation in the rental activity, or material participation in a short-term rental that meets the IRS rules for treatment as a nonrental activity. Start with a property estimate. Our team can help you explore those paths and coordinate with your CPA on using the deductions this year.
What if I plan to sell the property soon?
A shorter holding period can still be worth exploring. Cost segregation brings some depreciation forward, so compare the deductions you can use now with the study cost and projected taxes when you sell. Depreciation recapture depends on the assets and transaction, rather than one rate for everything. Our team can help you explore the upfront benefit and holding plan, then coordinate the sale-tax details with your CPA.
Are the estimated tax savings cash I can use this year?
They can translate into a current-year cash-flow benefit if you qualify to use the deductions. The calculator gives you a starting estimate using a 37% assumed marginal tax rate. Review your property's depreciable cost and placed-in-service date with our team, then confirm deduction eligibility with your CPA to estimate your actual benefit. Your tax rate and any required carryforward can affect how much you save this year.
Can I do a cost segregation study after the tax-filing deadline?
Yes, there may still be a path to claim missed depreciation. For an existing property, your CPA may be able to use Form 3115 and a catch-up adjustment, depending on its filing history and other requirements. The study timing doesn't change the property's acquisition or placed-in-service date, which determine the applicable bonus-depreciation rules. Start with an estimate and have our team help you explore the next step with your CPA.
How do I get my property estimate?
Enter your property address and project details to generate an automated estimate in 30-60 seconds.
Can I change the assumptions to compare scenarios?
Yes. Edit the purchase price or construction cost, land value and property type in your report to recalculate the estimate. Change one assumption at a time to see how the result responds. The tax rate is currently assumed at 37%; it is not an editable input.
Is this an IRS-ready study or a planning estimate?
It's a planning estimate built on AI analysis and data from 1,000+ studies representing over $1 billion in analyzed real estate. Use it to explore your property's potential savings and decide whether to move forward with a paid engineering study. Filing requires supported asset classifications and depreciation schedules for your property. Use the calculator as your starting point, then review the next step with our team.
Where do the starting property details come from?
Our AI pulls data from 15+ external sources, including broker listings, property photos, county and state assessor records, satellite imagery, construction databases and public statistics, to give you a head start. Check the suggested inputs against your purchase documents and property details, then update any assumptions that need correcting. Refining the inputs helps you explore a more useful estimate for your property.