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Mark Cuban warns that California's proposed billionaire tax could drive investors and startups away from the state.

Mark Cuban warned that California's proposed one-time 5% wealth tax on billionaires could drive investors and startups out of the state. The measure, which has qualified for the November ballot, would apply retroactively to residents as of January 1, 2026. While supporters argue the tax would generate billions for healthcare and education, critics like Cuban argue it could influence where investors put their money. Cuban stated that if the tax passes, he will personally remain a resident, but will ask multi-billion dollar startups to move from California first. The proposal has divided the Democratic establishment, with Governor Gavin Newsom and several labor unions opposing the measure despite its endorsement by the California Democratic Party. IRS data reveals that California is already experiencing significant taxpayer outflows, with Los Angeles County leading the nation in losses. These losses suggest that high-tax states like California and New York are pushing wealth and jobs toward states like Texas and Florida.

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