A permanent 100% bonus depreciation deduction now applies to qualified property acquired and placed in service after January 19, 2025 (IRS Notice 2026-11). Property acquired under a written binding contract signed before January 20, 2025 is treated as acquired on the contract date and keeps the old phase-down rate. For rental property owners, tax filing has become tax planning. The professional you hire decides how much of that benefit you actually capture.
The short answer: hire a CPA who already works with real estate investors and short-term rental (STR) owners, and who knows how to coordinate a cost segregation study. A competent generalist can file an accurate return and still leave five-figure deductions unclaimed.
This guide gives you the interview questions, the STR specifics, the red flags, and the cost segregation context to raise before you sign an engagement letter.
Key takeaways
- Hire a CPA whose existing clients are mostly real estate investors. Ask for the percentage.
- Ask how they classify your short-term rental: 27.5-year residential rental property or 39-year nonresidential real property.
- A specialized firm performs the cost segregation study. Your CPA reviews the results and integrates them into your return.
- Ask whether you could qualify for real estate professional status and what documentation they will require.
- Confirm they can handle Form 3115 look-back studies for properties bought in earlier years.
- Get pricing in writing. Walk away from anyone who guarantees a specific tax outcome.
- Verify every deduction claim against a second source before you act on it.
What a real estate CPA actually does
A CPA prepares and signs your return. That work includes depreciation schedules on Form 4562, passive activity loss tracking, estimated payments, and entity planning for LLCs and partnerships.
Strong real estate CPAs add planning through the year. Timing matters: when the property is placed in service, and whether the study is finished before your return is filed. Depreciation, including bonus, starts in the year the property is placed in service. For a rental, that is when it is ready and available to rent. A study completed after year-end but before you file still applies to that year. A study completed after filing goes in through an amended return or Form 3115. Entity structure, 1031 exchanges, and refinancing all interact with depreciation.
A real estate specialist does four things a generalist rarely does:
- Models depreciation scenarios before you buy or renovate.
- Tracks hours and participation for real estate professional status.
- Coordinates with cost segregation engineers and reviews their reports.
- Plans passive loss usage against current and future income.
CPA, EA, or real estate tax advisor?
Titles vary. A CPA is state-licensed and can represent you before the IRS. An enrolled agent is federally licensed for representation. Many excellent real estate tax advisors hold one of these credentials, and some hold both.
The license matters less than the client mix. Ask what fraction of their filings involve rentals, STRs, or partnerships. A preparer who files 200 returns a year and three of them involve real estate is learning on your dollar.
Why the wrong accountant gets expensive
Missed depreciation is often recoverable. A Form 3115 look-back can pull prior-year deductions into the current year once the incorrect depreciation has been used on two or more filed returns. If only one return has been filed, you generally amend it. For property placed in service in the immediately preceding year, the automatic-change rules also allow Form 3115 instead. Form 3115 cannot undo a valid election out of bonus depreciation, and the section 481(a) catch-up on a passive rental is still subject to the passive loss rules. What cannot be recovered is the planning you never did.
| Factor | Generalist preparer | Real estate CPA |
|---|---|---|
| Depreciation strategy | Default schedules | Acceleration analysis each year |
| STR classification | Often assumed residential | Tested against the transient-use rules |
| Cost segregation | May not know the workflow | Coordinates and reviews the study |
| Passive loss planning | Reported, rarely optimized | Planned against your income targets |
The tax code rewards preparation, not hindsight.
Nine questions to ask before you hire
Ask these in the first conversation. Vague answers are answers.
- What share of your clients own rental property? Look for a majority or a substantial dedicated practice.
- How do you classify my short-term rental? They should mention the transient-use rules, not just assume 27.5-year treatment.
- Have you coordinated a cost segregation study before? Ask how many in the last two years and what they check in the report.
- How do you handle passive losses? They should ask about your participation hours and income, not just carry the number forward.
- Could I qualify for real estate professional status? If yes, they should describe the 750-hour and more-than-half tests, the separate material participation requirement for your rentals, and the documentation they need.
- Can you work with an outside study firm? Coordination is normal. Refusal is a warning sign.
- Do you prepare Form 3115? It is needed for look-back studies on earlier purchases.
- How do you charge? Flat fees and hourly rates are normal. Avoid fees contingent on reported savings.
- Who signs the return? You want the person advising you to be the person accountable for it.
The STR questions most CPAs miss
Short-term rentals follow different rules than long-term rentals, and the differences change the math.
Classification. Publication 946 places buildings in two buckets: 27.5-year residential rental property and 39-year nonresidential real property (IRS Pub. 946). Residential treatment requires that 80% or more of gross rental income come from dwelling units, and it excludes property used on a transient basis. Under IRC §168(e)(2)(A), that exclusion applies when more than half of the units are used on a transient basis, meaning stays of under 30 days. For a typical STR, transient-use rules generally apply and the 39-year schedule follows. This recovery-period test is separate from the average-stay tests under the passive loss rules below.
Material participation. Material participation only helps once the STR is not a "rental activity." The common routes are an average guest stay of 7 days or less, or 30 days or less with significant personal services (Treas. Reg. §1.469-1T(e)(3)(ii)). From there, STR losses are nonpassive only if you materially participate. One common test requires more than 100 hours of participation and no fewer hours than any other individual (Treas. Reg. §1.469-5T). A tie passes. "Any other individual" includes cleaners, co-hosts, and property managers. A spouse's hours count together with yours, not against you. Ask your CPA which test they are using and what records will support it.
Real estate professional status. Investors with W-2 income often ask whether losses can offset it. The statutory test requires more than 750 hours in real property trades and more than half of your personal service time, counting only real property trades or businesses in which you materially participate (IRC §469(c)(7)). Hours as an employee count only if you own more than 5% of the employer, which matters for W-2 agents and property managers. For joint filers, one spouse must meet both tests alone (Treas. Reg. §1.469-9(c)(4)). REPS by itself does not make the losses nonpassive. You must also materially participate in the rentals, tested property by property unless you make the aggregation election (Treas. Reg. §1.469-9(g)). A specialist will tell you early whether this path is realistic. See our guide to real estate professional status for the details.
If your CPA has never raised these issues on an STR return, keep interviewing. The short-term rental loophole only works when the classification and participation tests are handled correctly.
Where cost segregation fits in
A cost segregation study is an engineering exercise, not an accounting one. A study firm separates personal property, land improvements, and short-life building components from the structure. In our client studies, reclassification commonly lands between 20% and 35% of the depreciable basis.
Your CPA does not perform the study. Their role is to recommend a credible firm, review the report, book the adjustments, and integrate the results into your return. For a property bought in an earlier year, they file Form 3115 to capture the missed depreciation as a current-year catch-up.
Here is what the coordination is worth. Assume:
- Purchase price: $600,000
- Land allocation: $150,000
- Depreciable basis: $450,000
- Reclassified to 5-, 7-, and 15-year property: 25%, or $112,500
- Federal bracket: 37%
- STR classification: 39-year property
- Simplified first-year federal illustration using full-year figures. Assumes the property qualifies for 100% bonus and the deductions are fully usable this year at 37%
Without a study, year-one depreciation is roughly $11,540 on a simplified full-year basis. With a study, the $112,500 reclassified basis is deducted in year one under 100% bonus depreciation, and the remaining $337,500 depreciates over 39 years, about $8,650 per full year.
| Scenario | Year-one deduction | Tax saved at 37% |
|---|---|---|
| No study | ~$11,540 | ~$4,270 |
| With study | ~$121,150 | ~$44,830 |
The difference is about $40,560 in first-year cash. Accelerated depreciation mainly shifts the timing of deductions. Qualified properties commonly generate potential first-year tax savings of 10 to 25 times the study fee, though actual results depend on depreciable basis, land allocation, reclassification results, tax rate, bonus eligibility, and your ability to use the deductions. See more on cost segregation ROI.
Red flags that should end the interview
- Guaranteed outcomes. No professional can guarantee a specific tax result.
- Contingent fees. Fees based on a percentage of reported savings create the wrong incentives.
- No Form 4562 fluency. If they cannot walk you through a depreciation schedule, keep looking.
- Dismissive of cost segregation. Some studies do not pencil out, and a good CPA will say so property by property. Blanket rejection usually signals unfamiliarity. Read up on common CPA objections before the meeting so you can separate caution from habit.
- Refusal to collaborate. Real estate tax work spans preparers, attorneys, and engineers.
What specialized help costs
Cost segregation study fees vary with property size and complexity. Engineering-based studies generally run $3,000 to $15,000 or more across the industry. Residential and smaller commercial properties commonly fall between $2,500 and $7,500. R.E. Cost Seg provides fully engineered cost segregation services starting at $2,320.
Price the study before the CPA conversation. A cost segregation calculator estimate gives you a number to test against the study fee.
Frequently asked questions
Do I need a CPA to order a cost segregation study?
No. The study is prepared by a cost segregation firm with engineering and tax expertise. Your CPA reviews the report and integrates it into your return. Many investors order the study first and bring the results to the CPA.
Can a study help property I bought in earlier years?
Usually. A look-back study uses Form 3115 to change your accounting method. The missed depreciation arrives as a catch-up deduction in the current year once the incorrect depreciation has been used on two or more filed returns. With only one filed return, you generally amend it, although property placed in service in the immediately preceding year can also use Form 3115. Form 3115 cannot undo a valid election out of bonus depreciation, and the catch-up on a passive rental is still subject to the passive loss rules.
How much does a real estate CPA cost?
It depends on complexity. A single rental with a clean schedule costs less than a five-property portfolio with partnerships. Ask for a quote that lists the services included, and compare scope rather than price alone.
Does every short-term rental qualify for accelerated depreciation?
Most STRs can claim accelerated depreciation. Eligibility for bonus turns on the property type and the acquisition and placed-in-service dates (IRC §168(k)(2)). Whether the loss offsets your other income depends on classification, material participation, and your income situation (IRC §469). Ask a specialist to test the facts before you plan around the deduction.
Choose first, plan second
The right CPA asks about your properties, your hours, and your plans before they talk about fees. The wrong one files your return and moves on.
Start with pricing. Get a free proposal from R.E. Cost Seg, take the estimate into your CPA conversation, and hire the professional who can explain exactly how the study results will land on your return.
