CPA Worksheet — Tahoe Cost Segregation Reference

1. State conformity for California / Nevada

Lake Tahoe straddles the California–Nevada state line, and this matters more for cost segregation than most owners realize. On the California side (South Lake Tahoe, Tahoma, Tahoe City), California §168(k) is decoupled from federal — so 100% federal bonus depreciation produces a federal benefit only, with no parallel state deduction. On the Nevada side (Incline Village, Crystal Bay, Stateline), Nevada has no state income tax at all, so the federal deduction is the entire tax story. Two properties on opposite shores of the same lake produce materially different effective tax savings.

Decoupling note: California taxpayers must add back the federal bonus depreciation deduction on Schedule CA (540) and depreciate the California basis on the regular MACRS schedule. This creates a permanent timing mismatch, not a tax-saving — the federal acceleration is real but the California portion of your liability is unaffected. For high-income CA buyers ($1M+ income), the after-tax math should assume only the federal deduction is real.

State income tax structure: Split — CA progressive (decouples from federal §168(k)); NV has no state income tax
Conforms to federal §168(k) bonus: No / partial
State addback required on federal bonus deduction: Yes

2. MACRS classification (Rev. Proc. 87-56 + IRS Pub. 946)

The engine assigns MACRS class lives by component category, derived from Rev. Proc. 87-56 asset class tables. Summary:

Component category	Recovery period	IRS asset class (typical)
Personal property: FF&E, decorative finishes, certain electrical (kitchen plugs), carpet	5-year	Asset class 57.0 (distributive trades) or building-specific
Personal property: office equipment, certain agricultural	7-year	Asset class 00.11 (office furniture and equipment)
Land improvements: paving, landscaping, fencing, site lighting, hardscape	15-year	Asset class 00.3 (land improvements)
Residential rental structure	27.5-year SL	§168(e)(2)(A)
Nonresidential real property (office, retail, industrial)	39-year SL	§168(e)(2)(B)

3. Bonus depreciation (current law)

OBBBA (One Big Beautiful Bill Act, signed July 2025) permanently restored 100% bonus depreciation under §168(k) for property placed in service in 2025 and later. Historical: 80% (2023), 60% (2024), 100% (2025 onward). Bonus applies to all assets with MACRS recovery periods of 20 years or less — so all 5, 7, and 15-year components reclassified by the study are bonus-eligible.

4. Engine methodology summary

For a Tahoe property, the Cost Seg Smart engine:

Determines land allocation from county assessor records (if available and reliable) or from a statistical metro → state → national fallback. Premium land floor applies when reconciliation rf_raw exceeds 2.0.
Applies RSMeans 2024 base $/SF costs to component categories, scaled by the geographic factor for Tahoe's metro tier.
Applies BLS PPI to adjust RSMeans 2024 dollars to the property's acquisition-date dollars.
Applies STR FF&E uplift if the property is a short-term rental (engine treats this differently from long-term rentals).
Reconciles component-bottom-up sum against the depreciable basis to produce the final MACRS allocation.
Runs 16-check QC validation (PASS / REVIEW / FAIL) with compound-OK downgrade logic before emitting the final study.

Full methodology at costsegsmart.com/methodology.

5. Audit defense documentation

Each Cost Seg Smart study includes written audit defense documentation as part of the deliverable. The package contains:

Component-by-component cost derivation chain (RSMeans citation → PPI adjustment → geo factor → reconciliation)
Source records used for land valuation (assessor record citation or statistical methodology disclosure)
IRS authority citations for each MACRS classification (Rev. Proc. 87-56 asset class + Pub. 946 reference)
Reconciliation factor narrative explaining any adjustments outside the "A" band

For complex audits requiring expert testimony, Cost Seg Smart engineering review is available on retainer.

6. CPA channel

Cost Seg Smart operates a CPA partner portal for white-label studies, branded client links, and partner margin tracking. If you're advising Tahoe-area clients regularly, email [email protected].