How to Choose a Cost Segregation Firm

A cost segregation study is only as good as the methodology behind it, and methodology is exactly what a marketing page will not tell you. Here is how to evaluate a provider and what separates a defensible study from an expensive spreadsheet.

Which kind of cost-seg company fits an STR buyer?

For a purchase in the next six months, compare the whole chain, not only the study quote. An engineering-only firm may be a good fit if your existing CPA already understands STR activity classification, Form 4562, loss limitations and return integration. A software-led provider may cost less and move quickly on a simple property, but ask who verifies the asset inventory, values components and answers examination questions. An integrated tax-advisory and study team can coordinate the study with the filing position, although you should still compare its methodology, scope and price with independent alternatives.

Our preferred tax introduction is AE Tax Advisors. Its published service describes study coordination and tax-return integration, which is why we introduce purchase-ready clients early. This is a disclosed referral relationship, not an independent ranking or a claim that AE is the cheapest or best firm for every property. You are free to retain your own CPA and study provider. Ask AE and any alternative for a redacted sample report, the named preparer, the fee for each phase, the handoff to Form 4562, and what happens if the proposed tax benefit is limited. The IRS cost-segregation audit guide is a useful source for evaluating how well the underlying study is documented; it is not an endorsement of any company.

Before signing a study contract, use our STR buyer tax-form map and Form 4562 purchase handoff to decide whether the study could materially change your offer, launch cash or timing. If the home only works because of an unverified first-year refund, renegotiate or pass on the real estate rather than buying a report to rescue the deal.

The approaches are not equivalent

Providers use different methodologies, and the IRS has published guidance discussing approaches and what constitutes a quality study. In broad terms, engineering based approaches that identify and cost actual components carry more weight than approaches that apply general percentages or rules of thumb to a purchase price.

The practical translation: a study that examines the property, identifies specific assets, and documents how each was valued produces a report that can be explained under scrutiny. A study that applies a template percentage produces a number that cannot.

Seven questions to ask a provider

1. What methodology do you use, and how is it documented in the report? Ask to see a sample report with the client details removed.
2. Do you perform a site visit or a structured remote inspection? If remote, what specifically do you require from me and how is it verified?
3. Who signs the report, and what are their qualifications? Engineering and construction cost expertise matter here.
4. What happens if the study is examined? Ask specifically what support is included and whether it costs extra.
5. How do you handle the land allocation? Land is not depreciable, and an aggressive land allocation is a soft spot in a weak study.
6. How many studies have you performed on short-term rentals specifically? Property type matters, because the asset mix in a cabin with a hot tub differs substantially from an office building.
7. What does the report cost, and what is included in that price? Compare like for like rather than headline numbers.

Timing considerations

• Acquisition and placed-in-service facts affect the applicable bonus depreciation percentage, not merely the year the study is performed. Two identical properties with different dates can produce different outcomes. Have a tax adviser apply the current IRS Form 4562 instructions; see bonus depreciation in 2026.
• A study can be performed on a property owned for years, with the change generally implemented through an accounting method change rather than amended returns. See look-back studies.
• Model the exit before commissioning the study, because accelerated depreciation reduces basis and increases gain on sale. See depreciation recapture explained.

Keep the report permanently

The study is not a one year document. Your CPA needs it at exit to calculate recapture, and it is the primary support for the position if the return is ever examined. Store it with your closing file rather than in an email thread. See building a documentation file that holds up.

Our tax partner publishes its own material on cost segregation studies and short-term rental tax strategy for readers who want more technical depth.

Frequently asked questions