Mark Cuban opposes California’s bold billionaire tax aimed at funding public good
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Billionaire investor Mark Cuban has voiced opposition to a proposed one-time wealth tax on Californians with net worth over $1 billion, claiming it could drive wealthy investors and startup founders out of the state. The measure, supported by labor unions, seeks to address inequality and fund essential health-care and education programs.
California voters will soon have the chance to strike a blow against extreme wealth concentration by voting on a ballot initiative that would impose a one-time 5% tax on residents whose net worth exceeds $1 billion. Backed by the Service Employees International Union, this proposal is designed to redirect a small fraction of the vast fortunes hoarded by the ultra-wealthy into desperately needed health-care and education funding. The tax would even apply retroactively to those who were residents as of Jan. 1, 2026, ensuring billionaires contribute their fair share.
Recently released IRS data reveal a trend of high-income individuals leaving the state, with Los Angeles County alone losing 17,496 filers and $1.9 billion in income. Other counties, including Orange, San Diego, Riverside, and San Bernardino, have also seen significant departures. While the wealthy may threaten to leave, the real question is whether California should continue to cater to their interests at the expense of the public good.
During a public exchange with Democratic Rep. Ro Khanna, who defended the tax as a step toward economic justice, billionaire entrepreneur Mark Cuban predictably warned that the measure could influence where investors allocate capital and where startups operate. Cuban, who himself would not be directly affected, stated, “If this passes, and it doesn't directly impact me at all, I won't be a Cali resident, but you can bet if I'm investing in a multi-billion-dollar startup, I'm asking them to move from California first.”
Cuban further suggested that only startup founders unwilling to relocate would remain in the state, implying that higher taxes would drive away innovation. Yet, this debate exposes the reality that the ultra-rich often threaten to withhold their wealth unless they are allowed to avoid contributing to society. Supporters of the tax argue that it is a necessary step to ensure the richest Californians finally pay back into the communities that made their fortunes possible, funding critical public services for all.