Cost Segregation in California: State Tax Rules (2026)

California investors run cost segregation studies, see an enormous federal deduction, and then discover their California return barely moved. The study was not wrong. California simply does not follow the federal rules that make the deduction large.

With a top individual rate of 13.3%, the state side is not a rounding error. Understanding what California allows changes how the study should be modeled and, in some cases, whether it should be run at all.

California Does Not Conform to Bonus Depreciation

California has not conformed to federal bonus depreciation under IRC Sec. 168(k) at any point since the provision was enacted. There is no addback and recovery mechanism, no partial conformity, and no phase-in.

For state purposes, the reclassified components identified in a cost segregation study depreciate over their MACRS recovery periods on a California schedule. Five-year property depreciates over five years. Fifteen-year land improvements depreciate over fifteen.

That is still substantially faster than 27.5 or 39 years, so the study does produce a California benefit. It simply arrives over years rather than all at once.

The practical effect is that every California investor running a study maintains two depreciation schedules for the life of the property, with a growing difference between federal and state basis that must be tracked through to disposition.

Section 179 Is Capped Far Below Federal

California limits the Sec. 179 deduction to $25,000 with a phase-out beginning at $200,000 of qualifying property placed in service. The federal limit for 2025 is $2,500,000 with a $4,000,000 phase-out threshold.

For a business owner placing $600,000 of equipment in service, the federal deduction is the full amount and the California deduction is zero, since the phase-out has fully eliminated it.

California also does not conform to the federal qualified real property provisions in IRC Sec. 179(f), so roofs, HVAC, fire protection, and security systems on nonresidential buildings cannot be expensed at the state level.

Passive Loss Rules Track Federal, With a Twist

California generally conforms to the passive activity loss rules of IRC Sec. 469, including real estate professional status and the $25,000 special allowance.

But because California depreciation is smaller, the California passive loss is smaller. An investor with a $340,000 federal loss from a study may have a $58,000 California loss in the same year, with the balance arriving over the following fourteen years.

California also requires separate tracking of suspended passive losses for state purposes, since the amounts differ. Investors who assume the federal suspended loss carryforward applies to California are wrong, and the discrepancy compounds annually.

The LLC Fee Nobody Budgets For

California imposes an $800 minimum annual franchise tax on every LLC doing business in the state, plus a gross receipts fee that begins at $900 for total California income of $250,000 and rises to $11,790 above $5,000,000.

An investor with six California rental LLCs pays $4,800 in minimum tax alone before any income tax, and the gross receipts fee is assessed on gross rents, not net income. A property with negative cash flow still owes it.

This is a genuine argument for consolidating California properties into fewer LLCs, weighed against the asset protection cost of doing so. The fee is per entity, not per property.

An out-of-state LLC owning California property is doing business in California and owes the same amounts. Forming in Wyoming or Nevada does not avoid this.

Nonresident Owners

California-source rental income is taxable to nonresidents. Withholding is generally required on payments to nonresident owners, and a California nonresident return is required.

California also applies a throwback concept to certain trusts and has an unusually aggressive residency audit program. Investors who move out of California while retaining California rental property should expect the state to examine the facts of the move, and should document it thoroughly.

Worked Example: What the Study Actually Produces

A California investor acquires a $2,300,000 apartment building. Land is allocated at $520,000, leaving $1,780,000 depreciable. A study reclassifies 25%, identifying $267,000 of five-year property and $178,000 of 15-year land improvements.

Federally, all $445,000 is bonus eligible and deductible in year one, plus $48,545 of structural depreciation, for roughly $493,545.

For California, no bonus applies. Five-year property produces roughly $53,400 in year one under MACRS, 15-year property produces roughly $8,900, and the structure produces $48,545. California depreciation is roughly $110,845.

The first-year difference is $382,700. At a 13.3% California rate, the state benefit deferred is roughly $50,900, recovered over the following fourteen years rather than lost.

The study is still clearly worth running. California accelerates from 27.5 years to five and fifteen, which is meaningful. The error is modeling the state benefit as though it mirrors the federal one.

Planning Implications

Model both schedules before commissioning the study, not after. The federal number sells the study. The combined number determines whether it fits your situation.

Track federal and California basis separately from day one. At disposition, California gain will differ from federal gain, sometimes substantially, and reconstructing fourteen years of divergent schedules retroactively is expensive.

Consider entity count deliberately given the franchise tax and gross receipts fee.

For investors contemplating a move out of California, understand that California property continues to generate California-source income and California filing obligations regardless of residency.

State conformity provisions are amended frequently and the mechanics below should be confirmed against the current year instructions before filing.

Frequently Asked Questions

Does California allow bonus depreciation?

No. California has never conformed to federal bonus depreciation under IRC Sec. 168(k). Reclassified components from a cost segregation study depreciate over their MACRS recovery periods on the California schedule, which is still far faster than 27.5 or 39 years.

What is California's Section 179 limit?

$25,000 with a phase-out beginning at $200,000 of qualifying property, against a federal limit of $2,500,000 for 2025. For most businesses placing meaningful equipment in service, the California deduction is fully phased out.

Is a cost segregation study still worth it in California?

Usually yes. The state benefit arrives over five and fifteen years rather than immediately, but accelerating from 27.5 or 39 years is still substantial. The mistake is modeling the state benefit as though it matched the federal one.

Do I owe the LLC fee on a property losing money?

Yes. The $800 minimum franchise tax applies regardless of profitability, and the gross receipts fee is assessed on gross California income, not net. A property with negative cash flow still owes both.

Can I avoid California tax with a Wyoming LLC?

No. An out-of-state LLC owning California property is doing business in California and owes the same franchise tax, gross receipts fee, and income tax on California-source income. The formation state affects liability protection, not California taxation.

Cost Segregation in California: Why the State Deduction Looks Nothing Like the Federal One