Scottsdale Airbnb Tax CPA Worksheet

What this worksheet covers

Use this page as a one-stop checklist when filing a federal return that includes a Cost Seg Smart Scottsdale study. Sections: (1) property data your CPA needs from the study, (2) Form 4562 line mapping for current-year placed-in-service, (3) Form 3115 §481(a) lookback worksheet for prior-year studies, (4) material participation log template for §469 STR loophole, (5) Arizona state filing notes.

Property data checklist (from the study PDF)

Before mapping to Form 4562, confirm the study contains all data you need to file. Cost Seg Smart 35–45 page PDFs include each item below. If something is missing or unclear, email hello@costsegsmart.com for clarification.

• Property characteristics: address, APN (Maricopa Assessor), purchase price, acquisition date, placed-in-service date, square footage, year built, property type (SFR / STR / condo / MF / commercial).
• Land allocation: total purchase price minus land value = depreciable basis. Cost Seg Smart studies cite source (Maricopa Assessor records, customer-provided appraisal, or statistical model) and show the calculation.
• Component-level breakdown: industry-standard 2026 cost basis per component, MACRS classification per Rev. Proc. 87-56, recovery period (5/7/15/27.5/39).
• Reconciliation factor (S): the scalar applied so component sums match depreciable basis to the penny.
• Year-1 schedule: bonus depreciation calculation, Year-1 deduction by MACRS class.
• Multi-year schedule: depreciation projection through full recovery period (Years 1 through 27.5 or 39).
• Form 3115 §481(a) section (if lookback): cumulative missed depreciation calculation by class.
• Documented technical review: methodology and component-classification review.
• 13 IRS ATG quality elements: methodology section addressing each Pub 5653 §3.4 element.

Form 4562 line mapping (current-year placed-in-service)

For a property placed in service in 2025 with a Cost Seg Smart study, the depreciation deduction lands on Form 4562. Mapping by MACRS class:

Cost Seg Smart studies include a "Form 4562 mapping table" page that translates the per-component breakdown into line-by-line form entries. Use this directly, it eliminates the manual translation step.

Form 3115 §481(a) lookback worksheet

For a property owned 2+ years without a prior cost-seg study, file Form 3115 (Application for Change in Accounting Method, Designated Change Number 7) with your current-year return. The lookback claim runs as a §481(a) catch-up adjustment, no amended returns required.

§481(a) calculation

Filing checklist

• Form 3115: file with current-year return; DCN 7 (depreciation method change).
• Automatic consent: no IRS approval needed in advance for DCN 7.
• §481(a) adjustment: claim full amount in current year (positive adjustment is deductible in one year; negative is spread over 4 years if applicable).
• Cost Seg Smart study: attach methodology section + depreciation schedule as supporting documentation.
• Audit trail: retain the study PDF + Form 3115 working papers indefinitely.

Material participation log template (§469 STR loophole)

For Scottsdale Airbnb / STR owners claiming §469 7-day average-stay treatment to make losses non-passive, the IRS expects documented material participation. The seven §469 tests are in Treas. Reg. §1.469-5T. The most commonly used: 100 hours + nobody does more.

What counts as material participation hours

• Booking management: responding to guest inquiries, screening guests, managing platform listings (Airbnb, VRBO, direct booking).
• Cleaning coordination: scheduling cleaners, inspecting between guests, sourcing cleaning supplies. (Cleaner labor itself doesn't count, but YOUR coordination time does.)
• Maintenance & repairs: handling maintenance requests, sourcing repairs, doing handyman tasks personally.
• FF&E refreshing: sourcing furnishings, restocking supplies (coffee, soaps, paper goods), seasonal updates.
• Marketing: updating listings, photography, pricing strategy, special-event campaign management (Spring Training Cactus League, WM Phoenix Open, bachelorette/golf weekends).
• Financial management: bookkeeping, expense tracking, reservation accounting (excludes time spent with your CPA on tax filing).

Log template (example day)

Cumulative target: 100+ hours/year for the 100-hour test. Most self-managing Scottsdale STR owners clear this by April from event-week activity (Spring Training February-March + WM Phoenix Open February typically logs 30-40 hours alone). Pool service coordination adds 4-8 hours/month.

Arizona state filing notes (§168(k) conformance + pool depreciation)

Pool / outdoor amenity classification (Scottsdale STR centerpiece)

~70% of Old Town Scottsdale STRs have pools. Pool + outdoor amenities classify into accelerated MACRS classes per Rev. Proc. 87-56, this is the largest market-specific reclassification factor in our network:

The cumulative pool/outdoor effect drives accelerated allocation from baseline 27% to ~37% on Old Town STRs, a 1.30× uplift. On a $1M Old Town property at 37% bracket, pool uplift = ~$25,000–$30,000 of additional Year-1 federal savings vs. a no-pool comparable. Cost Seg Smart engine applies this uplift automatically when property characteristics indicate pool/outdoor amenities.

Arizona state savings

Scottsdale property tax is separate from cost-seg basis. Maricopa Assessor reassessments affect property tax, not federal/AZ depreciable basis.

For STRs: Scottsdale's SB 1168 STR licensing ($250 annual + emergency contact + neighbor notification + TPT registration) is operational, not federal/state tax. Make sure license is active in the tax year you claim the deduction.

Audit defense quick reference

If the IRS examines a Cost Seg Smart Scottsdale study, the response path is well-defined:

Free CPA response is included with every Cost Seg Smart study, no add-on fee, no audit-defense subscription. Full audit-defense methodology at costsegsmart.com/methodology/audit-defense/.