California Billionaires Could Face a One-Time 5% Wealth Tax in 2026

California’s wealthiest residents might soon encounter a significant financial change. A new proposal, the “2026 Billionaire Tax Act,” aims to impose a one-time 5% tax on the net worth of billionaires in the state. The initiative is designed to offset potential federal funding cuts to California’s Medicaid program, which could reach $30 billion. Part of the revenue would also support public education.

The proposal gained traction when supporters, including the Service Employees International Union (SEIU), submitted a request to the California Attorney General’s Office on October 21 to approve signature collection. If successful, the measure could appear on the November 2026 ballot.

How the Wealth Tax Would Work

Instagram | zuck | California’s proposed tax would directly hit high-earning tech leaders like Mark Zuckerberg.

The plan targets approximately 200 billionaires in California, who collectively hold around $2 trillion in wealth. Advocates argue that while this small group holds massive fortunes, the state’s other 19 million taxpayers shoulder a heavier burden relative to their actual income.

Dave Regan, president of SEIU-United Healthcare Workers West, emphasized the urgency of the measure:
“If we do not do this, millions of people are going to lose health care, an untold number of people will go without treatment, and there will be tragedy after tragedy.”

The tax would directly affect California’s top-tier tech executives, including Meta CEO Mark Zuckerberg and Nvidia CEO Jensen Huang. For these individuals, the one-time levy could amount to billions of dollars, signaling a major shift in the state’s approach to funding public services.

Population Shifts and Tax Revenue Concerns

The wealth tax comes at a time when California continues to experience population outflows to lower-tax states like Florida. Between 2023 and 2024, more Americans left California than any other state, according to Census Bureau data cited by Newsweek.

Camilo Miguel, Jr., CEO of Mast Capital, which is developing the Cipriani Residences Miami and The Perigon Miami Beach, commented on the migration trend:
“Miami represents a new start, a refreshing reset. I think that it’s a place where policies, economics, and lifestyle align very well.”

This trend highlights a potential challenge for California. While the tax could raise billions, it also risks encouraging more wealthy residents to relocate, further shrinking the state’s tax base.

Political and Economic Context

Instagram | realdonaldtrump | Trump signed the One Big Beautiful Bill Act, cutting $1.2 trillion in spending, largely impacting healthcare.

Earlier this year, President Donald Trump signed the One Big Beautiful Bill Act, which enacts $1.2 trillion in spending cuts over the next decade, with significant reductions hitting healthcare programs. California’s new proposal aims to offset some of those losses, safeguarding services that millions of residents rely on.

Supporters of the plan say the proposed wealth tax isn’t just about raising revenue—it’s about fairness. By asking the ultra-wealthy to contribute more, the state hopes to protect essential programs and prevent chronic underfunding. According to Realtor.com, the measure would need over 870,000 signatures by next spring to make it onto the ballot.

Weighing the Proposal’s Impact

The billionaire tax initiative reflects California’s attempt to sustain critical public services in the face of federal cutbacks. It raises larger questions about wealth distribution, the possibility of wealthy residents leaving the state, and long-term fiscal planning.

Ultimately, the measure’s fate depends not just on collecting enough signatures, but also on public opinion and the state’s political landscape. California now faces a choice: secure new funding to preserve health and education, or risk losing vital programs and residents to states with lower taxes.