Taxfoundation iconTaxfoundationAug 12, 2026

Constitutional Flaws of California’s Proposed Wealth Tax

Act (Proposition 40), which imposes a one-time 5 percent tax on billionaires' net worth, is vulnerable to numerous constitutional challenges, any of which could invalidate the tax in whole or in part.

Constitutional Flaws of California’s Proposed Wealth Tax

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Act (Proposition 40), which imposes a one-time 5 percent tax on billionaires' net worth, is vulnerable to numerous constitutional challenges, any of which could invalidate the tax in whole or in part.

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Act (Proposition 40), which imposes a one-time 5 percent tax on billionaires' net worth, is vulnerable to numerous constitutional challenges, any of which could invalidate the tax in whole or in part.

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