If California undid its ‘original sin’ and matched Texas on taxing property, it would raise more revenue than the billionaire tax, economists say

California voters will decide on Proposition 40, a proposed one-time 5% tax on assets of residents worth more than $1 billion; its backers say it could raise $100 billion. Economists Owen Zidar and Eric Zwick argue that reforming Proposition 13 could provide a broader, more durable revenue base: California homeowners pay an estimated average property-tax rate of 0.8%, versus 2% in Texas, and matching Texas could more than double residential property-tax revenue while easing home prices by around 13%. The article presents competing concerns about higher homeowner taxes, startup and economic impacts, and revenue volatility, with no vote outcome reported.

Analysis

The investable signal is less the one-off levy itself than the fiscal regime it could accelerate: California may be testing whether a volatile, narrow income base can be supplemented by taxing wealth without tackling the politically entrenched property-tax structure. A one-time collection would not establish durable funding for recurring obligations, so treating the headline revenue estimate as a lasting improvement in state credit quality is premature. Watch budget forecasts and recurring-revenue assumptions, not just the vote.

Near term, passage risk could raise uncertainty premiums for illiquid California founder-owned businesses: a tax bill against hard-to-sell holdings creates a potential forced-sale or relocation incentive, but that does not automatically translate into broad public-equity selling. Over 1–3 months, the key catalysts are implementation details, residency tests, valuation rules, and any legal challenge. Over 6–18 months, a serious property-tax reform debate could matter more for housing affordability and local revenues—but voter resistance makes that a low-confidence path, not a base case.

Contrarian read: Prop 13 is a plausible, broader tax base in theory, but politically difficult to unwind; the wealth levy may therefore be more actionable than structural reform despite its weaker revenue durability. No direct company-specific trade is justified by this article. Avoid extrapolating a single ballot measure into an immediate California housing or startup earnings shock.

Key Decisions for Investors

• No broad California risk trade solely on the proposal. Keep any event hedge targeted to private-company exposure and avoid assuming founders will sell listed shares absent evidence of actual liquidity needs.
• Put California municipal credit on a watch list rather than buying on the headline revenue estimate. Reassess if official forecasts count one-time levy proceeds toward recurring spending or if rating commentary flags revenue concentration.
• Track the final measure text, implementation timetable, residency and asset-valuation rules, and litigation risk; these determine whether the proposal produces cash, delayed collections, or relocation incentives.
• Treat property-tax reform as a longer-dated housing catalyst, not an imminent short. Revisit California housing and local-government exposure only if credible legislation advances or assessed-tax burdens change materially.