Public Finance of the States: California

California’s Singular Scale

California’s economy is roughly the size of the United Kingdom’s. Its state government collects more revenue than most countries. Its fiscal decisions ripple through national markets for municipal bonds, healthcare, and education. Analyzing California’s public finance requires first setting aside the usual state-level frameworks—California operates at a scale where different dynamics apply.

Revenue Structure and Volatility

California’s defining fiscal characteristic is not its level of taxation but its structure of taxation—specifically, its extraordinary dependence on personal income taxes from high earners.

Personal income tax accounts for roughly two-thirds of general fund revenue, with a top marginal rate (13.3%) that is the highest of any state. Critically, a large share of this revenue comes from capital gains realizations, which are highly concentrated among top earners and highly correlated with financial market performance.

The result: California’s revenues surge during bull markets and technology booms, and collapse during corrections. The dot-com bust caused a fiscal crisis. The 2008 recession caused a fiscal crisis. The volatility is structural, not accidental.

Proposition 13 (1978) imposed a 1% cap on property tax rates and limited assessment increases to 2% annually until a property changes hands. The consequence: long-time property owners (commercial and residential) pay taxes based on decades-old valuations while new buyers pay on current market values. This creates enormous horizontal inequities, constrains local government revenue, and has significantly shifted the fiscal relationship between the state and localities.

Sales tax is lower as a share of revenue than in Texas or Florida, partly because income taxes are so dominant.

Expenditure and Services

California’s scale enables services and programs that smaller states cannot sustain—a Medicaid program (Medi-Cal) that covers roughly a third of the state’s population, a university system of unparalleled scope, and an environmental regulatory apparatus that sets de facto national standards.

Healthcare: California has expanded Medicaid to all eligible adults and has pushed its own programs beyond federal floors in coverage and eligibility. This is expensive and represents a deliberate political choice.

Education: Despite large absolute spending, per-pupil K-12 spending has historically been below the national median when adjusted for cost of living—a consequence of Proposition 13’s constraint on local property tax revenues and the resulting dependency on state formula funding.

Pension and Debt Position

CalPERS and CalSTRS are among the world’s largest institutional investors and carry significant unfunded liabilities. The state has taken steps to increase contributions but the scale of the obligations remains a significant fiscal variable.

Key Tensions

• Revenue volatility: Budget surpluses and deficits swing by tens of billions of dollars across economic cycles, making long-term planning extremely difficult
• Proposition 13: The property tax structure is both politically untouchable and economically distorting; it suppresses housing turnover and creates fiscal inequities that compound over decades
• Housing costs: California’s housing affordability crisis—driven partly by land use regulation—creates fiscal and social costs that are increasingly difficult to offset with public programs
• Population dynamics: For the first time in its history, California has been losing population, raising questions about the sustainability of its tax base

What to Watch

Whether California can address its revenue volatility through rainy day fund discipline, whether housing costs can be reduced through land use reform, and whether the departure of higher-income residents in response to tax rates is a real structural shift or a cyclical anomaly.