NEW100% bonus depreciation, back for property bought after January 19, 2025see your estimate
Free cost segregation study
Upload your closing documents, photos and plans. We read them, split the building into 5, 7 and 15-year property and show the source behind every figure. The study is free.
Every figure in a study cites one of these
A rental home and a forty-unit building need different studies. Both come with the source behind every figure, and both are free.
$0
for the full study
No card and no quote. We earn only if you choose a partner to review or file it.
Closing statement, photos, plans and invoices. A phone walkthrough is enough to start.
Each amount links to the document or photo it came from, and to the rule that classifies it.
Photos become components. Plan sheets become square feet, linear feet and counts. Each one is classified with the rule beside it, so nothing short-life stays buried in the building.
See how it worksThe example on this page: a $475,000 rental home in Austin, placed in service in January 2026.
Enter what you paid and when. See a first range in a minute.
First estimate
Closing statement, photos, plans. We read each one and show what we found.
Your documents
Reading 3 uploads (step 2 of 3)
Every component, class and citation. Send it to your CPA or book a review.
The study is free because review is optional. When you want a CPA to check it, sign it or file it, pick a partner. That is how we earn, and you see the fee before you choose.
Start a study to see partnersNot a dashboard to learn. A report your CPA can read, check and file, with the working shown.
What you can deduct in year one, with and without the study, and where every dollar of basis lands.
First-year depreciation
$97,597
Asset classes
Share of basis
The rule that classifies each item and the document or photo that proves it is there.
Each part of the building that depreciates faster, tied to the photo, plan or invoice it came from.
Year by year, class by class, in the layout your CPA enters. Bonus depreciation is applied where the dates allow it.
| Year | 5 and 15-year | Building | Total | To date |
|---|---|---|---|---|
| 2026 | $87,400 | $10,197 | $97,597 | $97,597 |
| 2027 | n.a. | $10,640 | $10,640 | $108,237 |
| 2028 | n.a. | $10,640 | $10,640 | $118,877 |
| 2029 | n.a. | $10,640 | $10,640 | $129,517 |
| 2030 | n.a. | $10,640 | $10,640 | $140,157 |
| Traditional study | Online software | Costseg | |
|---|---|---|---|
| Price | $2,300 to $12,000 | $499 to $950 | $0 |
| Turnaround | 2 to 6 weeks | Minutes to 5 days | Same day |
| Property types | Any | Small residential | Residential; commercial in beta |
| Site visit | In person or by video | None | Your photos and plans |
| Professional review | Included in the fee | Extra, or none | Optional, from a partner CPA |
Other providers' prices and turnaround are ranges from their public pages, November 2026.
Yes. The study costs nothing and you can download it. We earn when you choose a paid review by a partner CPA, or use another partner we list.
The report follows the structure the IRS describes in its Cost Segregation Audit Techniques Guide and cites the rule behind every classification, so your CPA can check each line. Whether to file on it is their call. Many will want a review first, which is what the partner review is for.
Your closing or settlement statement, and photos or a phone walkthrough of the property. Plans and renovation invoices make the study more precise if you have them.
Residential rentals come first. Commercial buildings and larger apartment buildings are in beta: they rely on reading plan sheets, and each one is reviewed by a person before release.
Not always. The passive-loss rules, your income and your state all affect how much you can use now and how much carries forward. The study shows the deduction; your CPA decides what you can take.
Free for every property
No card, no sales call
