CPA Worksheet — Big Bear Cost Segregation Reference

1. State conformity for California

California decouples from federal §168(k) bonus depreciation. The federal 100% bonus restored by OBBBA in 2025 reduces your federal liability, but California requires the deduction to be added back on Schedule CA (540), with the basis depreciating on the regular MACRS schedule for state purposes. For a Big Bear owner in California's top 13.3% bracket, that means roughly 13 cents of every dollar of accelerated reclassification is recovered on the state return — the headline federal-savings number overstates total tax savings by a meaningful margin.

Decoupling note: California's decoupling is permanent and structural, not a temporary policy choice — it predates the federal §168(k) provision. For Big Bear cost-seg planning, model the federal benefit as your primary win and treat any California state savings as recovered slowly over the regular MACRS schedule.

State income tax structure: Progressive — California's top bracket is the highest state-level individual rate in the United States
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 Big Bear 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 Big Bear'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 Big Bear-area clients regularly, email [email protected].