Choosing a Cost Segregation Provider for Your Short-Term Rental
This article includes paid links to third-party reviews. It is not tax advice. Confirm recovery periods, bonus depreciation and loss usage with your CPA.
When you underwrite a short-term rental, you model occupancy, average daily rate and seasonality before you make an offer. Depreciation deserves a place in that model too. A cost segregation study can move a meaningful share of a property's cost into shorter depreciation periods, and for a fully furnished STR that share is often larger than for a long-term rental.
The benefit only materializes if the study is done well and your tax position lets you use it. This guide covers the questions to settle before you hire a provider and how to compare the firms on your shortlist.
Why STRs are well suited to cost segregation
A cost segregation study breaks a property into its components and assigns each one the recovery period the tax code allows. The building shell stays on a long schedule, but furniture, appliances, decor, certain finishes and dedicated electrical work may qualify as 5- or 7-year property. Site work such as paving, fencing and landscaping may qualify as 15-year land improvements.
STRs tend to carry more of these short-lived assets than a typical rental. Guests expect furnished interiors, upgraded kitchens and outdoor amenities, so a larger portion of your total investment may sit in categories that depreciate quickly. Under the One Big Beautiful Bill Act, qualifying property acquired after January 19, 2025 is eligible for permanent 100% bonus depreciation, which means those shorter-life components can often be deducted in the first year rather than spread out.
Two tax questions to settle first
Which recovery period applies to your building?
Long-term residential rentals are generally depreciated over 27.5 years. A property rented mostly to short-term guests may not qualify as residential rental property, and many tax advisers treat it as nonresidential, 39-year property. That changes the baseline your study works from, so confirm it with your CPA before comparing quotes.
Can you use the losses?
Rental losses are usually passive and can only offset passive income. However, when the average guest stay is seven days or less, the activity generally isn't treated as a rental activity under the passive activity rules. If you also materially participate in running the property, losses may be usable against other income. The IRS covers these rules in Publication 925. If the deductions will simply carry forward, the timing of a study matters less, and you may decide to wait.
What a good STR study captures
A generic report built from a template will miss what makes your property earn. Ask each provider how it will handle:
- Furnishings and fixtures: beds, sofas, linens, smart locks, TVs and the items guests photograph and review.
- Kitchen and laundry: appliances and, where justified, related plumbing and electrical work.
- Outdoor amenities: paving, fencing, lighting, landscaping and similar site improvements.
- Renovations after purchase: upgrades you made to win better reviews, documented with invoices.
The IRS sets out what it expects from a quality study in its Cost Segregation Audit Techniques Guide, including a preparer with construction and tax knowledge, a documented methodology and costs that reconcile to the total basis. A provider should be able to show you how its reports meet that standard.
How to compare providers
Do not start with a vendor's sales page. Ask your CPA which firms they have actually implemented, then add two or three others so you are not quoting one shop. Public write-ups help you see how a firm runs a study before you get on a call. CRE Daily's review of R.E. Cost Seg is one example: it walks through study types, pricing ranges and what the client versus the engineer still has to do.
Directories are a faster way to assemble names, not a ranking to outsource. Lists of the top cost segregation companies are useful for that first pass. Treat them as a shortlist. Many firms on those pages are built around commercial buildings and large portfolios. An STR with furniture, a hot tub and a patio is a different study than an empty office.
Once you have three names, compare them on the same terms:
- Experience with furnished vacation rentals, not just commercial buildings.
- Whether the study includes a site visit or relies on photos, plans and records.
- A redacted sample report your CPA can review.
- What the fee covers, including revisions and support if the IRS asks questions.
- Turnaround times that fit your filing deadline.
If two quotes are far apart, the cheaper study is often skipping fieldwork or allocating less to short-life property. Have your CPA look at the sample report before you pay.
Timing your study
The cleanest time to commission a study is in the year you place the property in service, when closing documents and renovation invoices are fresh. If you have owned your STR for a few years without one, you may still be able to claim the depreciation you missed through a change in accounting method on IRS Form 3115, without amending prior returns.
Plan for the exit as well. Faster depreciation now can mean more depreciation recapture when you sell, so model your expected holding period alongside the deduction.
The bottom line
For many STR owners, cost segregation is one of the larger levers in year-one returns. Settle the recovery period and loss-usage questions with your CPA, choose a provider that understands furnished rentals, and treat the study as part of your underwriting rather than an afterthought.