Most CPAs first hear about an STR acquisition after closing — when a client drops the HUD statement on their desk and asks what their tax savings will be. By that point, the property is purchased, the price is fixed, and the only question is what to do with the depreciation schedule. The analysis becomes reactive. You are explaining results, not shaping them.
The CPAs who add the most value to STR-investing clients do the opposite: they run the bonus depreciation math before the offer, flag disqualifying factors before the client commits to a price, and help clients understand the after-tax economics of a deal while there is still time to negotiate — or walk away. That conversation requires a checklist. Here is the one we recommend.
Who this is for: CPAs and tax advisors with clients actively evaluating or purchasing short-term rental properties — Airbnb, Vrbo, or similar platforms — with purchase prices between $400,000 and $3,000,000. The checklist applies to the §168(k) bonus depreciation strategy combined with the §469(c)(2) STR exception to passive activity rules.
The Six-Point Pre-Closing Checklist
Confirm the 7-day average stay rule is achievable for the specific market
The short-term rental exception under IRC §469(c)(2) requires an average guest stay of 7 days or fewer across all rentals during the tax year. Verify this by checking historical booking data for the property or market-level averages from AirDNA or the listing platform. Markets with primarily weekend bookings (2–4 nights) clear this easily. Markets where the property commands weekly rates — ski chalets, beach houses with Saturday-to-Saturday minimums — need closer inspection.
Pull the land value ratio from assessor data
Only improvements depreciate — not land. The county assessor's land-to-improvement split is the single most important number in the entire analysis. A property with 60% land value has a depreciable basis of only 40% of purchase price. A property with 20% land has an 80% depreciable basis. In the same $800,000 purchase, that difference is $160,000 vs. $640,000 in depreciable improvements. Run the assessor data first before anything else.
Score the property's bonus-eligible components
Within the depreciable improvement basis, estimate what percentage is 5-year personal property (appliances, flooring, cabinetry, fixtures, FF&E) and 15-year land improvements (pools, patios, outdoor kitchens, landscaping, fencing). These are the bonus-eligible categories under §168(k). A cabin with a hot tub, fire pit, outdoor kitchen, and high-end interior finishes may have 22–28% of purchase price as bonus-eligible. A basic condo may be 12–16%.
Verify the client can credibly meet a material participation test
Run through the seven tests under Reg. §1.469-5T. For most STR clients, the applicable test is Test 3: more than 100 hours of personal participation, and more hours than any other individual. Ask directly: Is the client using a full-service property manager? If yes, does the manager log more hours than the owner? If the manager handles all communications, cleaning coordination, and maintenance — and the owner is completely hands-off — material participation almost certainly fails. Get this answer before the client signs.
Check state conformity and model the state-level impact
California, New York, New Jersey, Massachusetts, Illinois, and Pennsylvania do not conform to federal §168(k). Clients in these states receive the full federal deduction but must add back the bonus amount on their state return. Model both scenarios: federal savings (always intact) and state savings (zero in non-conforming states). For a California resident buying in California at the 13.3% bracket, this gap is significant. For a Texas resident buying in Tennessee, both federal and state benefits are fully available.
Run a preliminary deduction estimate and present it before the offer
Once items 1–5 are confirmed, produce a preliminary Year 1 deduction range and present it to your client alongside the acquisition cost. This reframes the economics: a $950,000 property with a $185,000 Year 1 deduction at a 37% bracket has an effective net cost of $881,550 after federal tax savings in Year 1. Clients who see this number before the offer can factor it into their bid and their underwriting. Clients who see it after closing have already committed to a price without it.
The Land Value Ratio: Why It Dominates the Analysis
Of the six checklist items, land value ratio has the largest single impact on the deduction — larger than amenity mix, property age, or purchase price. Here is why it matters so much in practice:
Same purchase price. Same bonus-eligible percentage. The land ratio alone produces a 2.5x difference in tax savings: $65,120 vs. $26,048. For clients buying in coastal markets — Florida gulf front, Hawaii, Southern California beach towns — it is important to set accurate expectations early. The STR strategy can still be worth pursuing at higher land ratios, but the magnitude of the Year 1 benefit is much smaller.
Material Participation: The Conversation Most CPAs Avoid
The material participation conversation is awkward because clients often want full-service management and full bonus depreciation — and those two objectives are in direct tension. A full-service property manager who handles everything almost by definition logs more hours on the property than the owner does, failing Test 3. If your client wants to be completely passive, the STR exception almost certainly does not apply.
The important nuance: "material participation" does not mean the owner has to clean rooms and fix leaky faucets. It means the owner is actively managing — reviewing and approving all bookings, setting pricing, handling guest issues that escalate past the manager, overseeing capital improvements, making operational decisions. If the owner has 100+ hours per property and more than the manager, Test 3 is satisfied. Many clients genuinely meet this standard; they just need to document it contemporaneously.
Documentation guidance to give clients: Have them keep a simple weekly time log — a spreadsheet or even a shared Google Doc — with date, activity, and time spent. Categories to track: guest communications, pricing reviews, booking decisions, maintenance coordination, cleaning inspection, platform management, professional consultations (including calls with their CPA). Update it weekly, not at year-end. Courts and auditors look for contemporaneous records, not reconstructed summaries.
State Conformity Quick Reference
| State | Conforms to §168(k)? | CPA Note |
|---|---|---|
| California | No | Add-back required; state deduction is $0 from bonus dep |
| New York | No | Add-back required; depreciate on state schedule |
| New Jersey | No | Add-back required |
| Massachusetts | No | Add-back required |
| Illinois | No | Add-back required |
| Pennsylvania | No | Add-back required |
| Florida | Yes (no income tax) | Full federal benefit, no state income tax |
| Texas | Yes (no income tax) | Full federal benefit, no state income tax |
| Tennessee | Yes (no income tax) | Best-case scenario for STR investors |
| Arizona | Yes | Fully conforms, flat 2.5% rate |
| Colorado | Yes | Fully conforms, 4.4% flat rate |
| North Carolina | Yes | Fully conforms, 4.5% flat rate |
When to Push for a Formal Cost Segregation Study
A preliminary estimate — based on land value ratio, property type, and amenity mix — is appropriate for pre-closing analysis and planning purposes. For the actual tax return, CPAs have two paths:
For purchases under $600,000 with a bonus-eligible estimate below $80,000, an AI-powered analysis calibrated to formal cost seg methodology (±5% of formal study results) is generally sufficient for the return and supportable under audit. The cost ($99) is a rounding error relative to the deduction.
For purchases over $750,000, or for any client with AGI above $1M where the deduction will be closely scrutinized, a formal cost segregation study from a licensed engineer is the conservative recommendation. The cost runs $5,000–$15,000 but provides a certified, engineer-signed report that is the gold standard for IRS purposes.
The practical guidance: preliminary estimate for the offer analysis and pre-closing planning; formal study or high-quality AI analysis for the actual return filing. For more on this distinction, see AI Cost Segregation vs. Traditional Study: Which Do You Need?
Using DepreciMax in Your CPA Workflow
DepreciMax was built specifically for the pre-closing analysis gap. When a client sends you a Zillow listing and asks "is this a good depreciation play?", you can run the analysis in 10 minutes instead of pulling assessor data manually.
The market search tool pulls active STR listings in any market and scores each property by estimated bonus-eligible percentage, Year 1 deduction range, and a composite depreciation score — using land value data from county assessors, property age, price per square foot, and amenity signals from listing data. It is the fastest way to do the pre-closing land ratio check (checklist item 2) and the preliminary deduction estimate (checklist item 6) for any specific property your client is evaluating.
For clients who have already identified a property, the $99 AI property report takes 7–9 listing photos and produces a line-item depreciation breakdown: every 5-year, 15-year, and 39-year component classified by IRS category, with a total bonus-eligible percentage and Year 1 deduction estimate calibrated to ±5% of formal cost seg methodology. The report takes 10 minutes from photo upload to PDF. Many CPAs share it directly with clients as the basis for pre-closing analysis.
Run the Pre-Closing Analysis in 10 Minutes
Search any STR market free. Every property card shows the estimated bonus-eligible %, Year 1 deduction range, and land value ratio — before your client makes an offer.
Search Properties FreeFrequently Asked Questions
What should a CPA check before a client closes on a short-term rental?
Before your client closes on a short-term rental, verify six things: (1) the average guest stay in that market is below 7 days to qualify under IRC §469(c)(2); (2) land value ratio is low enough to produce a meaningful depreciable basis — ideally below 40%; (3) the property has bonus-eligible components (5-year personal property and 15-year land improvements); (4) the client can credibly meet a material participation test — typically the 100-hour test; (5) the purchase state conforms to federal §168(k) bonus depreciation; and (6) a preliminary deduction estimate has been run so the client understands the realistic Year 1 benefit.
How do I verify my client will qualify for the STR loophole?
Qualification requires two independent tests. First, average guest stay must be 7 days or fewer under IRC §469(c)(2) — confirm via historical booking data or market averages from AirDNA. Second, the client must materially participate under one of seven IRS tests — the most accessible is Test 3: 100+ hours of personal involvement and more hours than any other individual. If the client uses a full-service property manager who handles all operations, material participation typically fails.
What land value ratio makes STR bonus depreciation worthwhile?
A land value ratio below 40% generally produces meaningful results. At 30% land, a $750,000 STR has $525,000 in improvements — at 20% bonus-eligible, that is $105,000 in Year 1 deductions. At 60% land, the same purchase yields only $60,000. Coastal and urban properties often have ratios of 50–70%; mountain, lake, and rural markets typically run 15–35%, which is why they produce stronger bonus depreciation results.
Which states do not conform to federal bonus depreciation for short-term rentals?
California, New York, New Jersey, Massachusetts, Illinois, and Pennsylvania are the major non-conforming states. Investors in these states receive the full federal deduction but must add back the bonus amount on their state return. Florida, Texas, Tennessee (no state income taxes), Arizona, Colorado, and North Carolina fully conform.
How many hours must my client work on their STR to materially participate?
Under Test 3 (Reg. §1.469-5T), the client must participate more than 100 hours during the year AND more hours than any other individual. Self-managing investors who handle guest communications, pricing, and maintenance coordination typically meet this threshold. Investors with full-service managers who log more hours than the owner do not qualify. Document hours contemporaneously — weekly logs, not year-end reconstructions.