Cost Segregation Calculator

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Your Real Estate Tax Savings Start Here

Accelerate your real estate tax savings with our free cost segregation calculator designed specifically for residential rental properties.

This tool helps landlords, CPAs, and real estate investors estimate how much of a property’s value can be allocated to 5-year, 15-year, and 27.5-year depreciation categories—including the impact of bonus depreciation and IRS Section 168(k).

Whether you own a single-family rental or a multifamily building, this calculator can help you understand potential first-year tax savings before investing in a full engineering study.

Estimate your depreciation. Plan smarter. Maximize your after-tax return on investment.

Cost Segregation Benefits Illustration
Full Name
We use the email address to send you the full report after you complete your property's inputs. You are not added to a mailing list.
Did You Know?
Only the improvement portion of your property is depreciable. For example, if you bought a home for $500,000 and the land is worth $100,000, your depreciable basis is $400,000.
Property Address
Year should match the tax year selected
Select the tax year for which you're calculating depreciation. This determines available bonus depreciation percentage.
Total lot square Footage helps our calculator estimate your available land improvements. A quarter acre lot is approximately 10,000 square feet.
What is 'Depreciable Tax Basis'?
It's the portion of your property's purchase price that can be depreciated—typically the total cost minus land value.

Example: You purchased a property for $600,000. If the land is worth $150,000, your depreciable basis is $450,000.
Depreciable Tax Basis: 0
⚠️ Only the improvement portion of your property is depreciable. For example, if you bought a home for $500,000 and the land is worth $100,000, your depreciable basis is $400,000. ❗️ Do not use this tool for properties with a depreciable basis over $1.5 million. Results will be inaccurate.
How to estimate your tax rate:
If you're unsure, choose the closest bracket. Typical federal + state rates combined range from 22% to 40%.
Does Bonus Depreciation Apply?
Bonus usually applies unless you inherited the property from a relative and/or you must depreciate your property over ADS lives.
Are you using ADS depreciation?
(Single-family, duplex, triplex, fourplex, or fiveplex)
The number of stories helps our calculator estimate foundation and roof structures, as well as the total footprint of your building.
Did You Know? Removable flooring like carpet is typically 5-year property, while glued-down tile or wood is usually 27.5-year.
Appliances in Unit
Select all that apply.
HVAC System Type
Select only one.
Window Coverings
Select only one or leave unchecked if your building does not have window coverings.
Site Improvements (Check all that apply)
These help us estimate 15-year property costs related to site improvements. Select all that apply.
Full Name
Drag & Drop Files, Choose Files to Upload

View a Sample Cost Segregation Report Below

12345 Anywhere Cost Segregation Report
What is cost segregation, and how does it help me?

Cost segregation is a tax‑planning technique that breaks down a rental property into its component parts. Instead of depreciating everything over 27.5 years, certain elements—like appliances, flooring and land improvements—can be depreciated over 5 or 15 years. This accelerated depreciation increases your deductions up front, boosts cash flow and can significantly reduce your current‑year tax liability. Our cost‑segregation calculator helps you see the potential impact on your property before you pay for a formal study

How much does a cost‑segregation study cost?

At Wm. Neil Langlois CPA, LLC, our residential cost‑segregation calculator is completely free; anyone can use it to estimate their tax savings without commitment or payment. If you decide to pursue a formal cost‑segregation study, prices vary: streamlined software reports may start under six hundred dollars, while comprehensive, engineering‑based studies for larger or more complex buildings often run into the thousands. In most cases, the first‑year tax savings far exceed the fee. Use our free tool to decide whether a paid study makes sense for your property.

Why would a CPA firm offer a cost‑segregation calculator?

We don’t sell cost‑segregation studies or payroll services. We’re a CPA firm that prepares business and individual tax returns and provides year‑round advisory. We offer this free cost‑segregation calculator so our clients can evaluate the benefits of accelerated depreciation without falling prey to credit mills or high‑pressure sales tactics. By educating you and providing a trusted referral network, we help you make informed decisions and keep your overall tax strategy coordinated under one roof.

How does cost segregation fit into my overall tax strategy?

Accelerated depreciation is just one piece of a holistic tax plan. After you run the calculator, Wm. Neil Langlois CPA, LLC can help you integrate those projected deductions into your business return, coordinate with your personal return and ensure you’re not missing other opportunities like Section 179 expensing or the Qualified Business Income deduction. Even if you ultimately engage an outside specialist to perform a study, we’ll incorporate their report into your filings and provide ongoing advisory to optimize your tax savings year after year.

What happens after I use the estimator?

You’ll instantly receive a detailed cost‑segregation report by email, and we receive a copy to monitor quality. There’s no charge, no login and no automatic sales follow‑up. If you already work with a trusted advisor, share the report with them. If you don’t have one, you’re welcome to schedule a consultation with Wm. Neil Langlois CPA, LLC to discuss how the findings could fit into your broader tax strategy. Should you decide a formal study is warranted, we can introduce you to reputable cost‑segregation specialists—so you never have to navigate unfamiliar providers on your own.

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