In brief
California is poised to enact a 5% wealth tax on its 200-plus billionaires, a move that could raise $100bn for the state's cut‑sized health care system. The measure, known as Proposition 40, has ignited fierce debate among wealthy tech moguls, the state’s liberal governor and lawmakers. Supporters argue it will reduce the vast income gap and fund essential services, while opponents warn of capital flight and broader economic fallout. As voters head to the polls, the fate of this historic tax hinges on a slim margin of public support.
California, famed for its glitz, sprawling mansions and a high concentration of ultra‑rich individuals, is on the cusp of a historic decision that could reshape its economy and public services. A forthcoming ballot measure, Proposition 40, proposes a one‑time 5% tax on the net worth of anyone whose wealth surpasses one billion dollars in state. With more than 200 billionaires living in the state—including iconic names such as Oprah Winfrey, Meta founder Mark Zuckerberg and Skims co‑founder Kim Kardashian—the proposal could raise roughly $100bn to plug gaps left by federal health‑care funding cuts.
“It is the first billionaire tax this country has seen,” said UC Berkeley public policy professor Francesco Trebbi, emphasizing its potential to narrow California’s staggering wealth gap. The state, the largest U.S. economy and one of the world’s four biggest, also faces a stark homelessness crisis and growing inequality, with the top 1% of households owning nearly a third of all wealth. Proponents contend that the tax will compel the super‑wealthy to contribute a fair share while safeguarding essential services as federal dollars dwindle.
Support for Proposition 40 is mixed among the ultra‑rich. Some, like Nvidia CEO Jensen Huang and former Boeing executive Tom Steyer, have publicly backed the measure, citing the need to address public demand for equity. Others—most notably Google co‑founder Sergey Brin and the state’s sitting Governor Gavin Newsom—have opposed it, arguing that it may trigger a brain drain and erode California’s competitive edge. A recent Berkeley Institute poll found 45% favour the tax, 42% against, and 13% undecided.
Opponents warn that high‑rate wealth taxes can be costly to administer, suppress investment, and drive capital flight. International examples—including Norway’s recent hikes—see a rise in the wealthy exiting the country, while studies from Switzerland indicate even a modest increase can cut taxable wealth by several percent. In California, several billionaires have already relocated to escape the looming levy, with Google’s Larry Page and Sergey Brin departing for the state of Washington.
If approved, Proposition 40 would apply retroactively to those with a net worth of at least $1bn who were California residents on January 1, 2026. The measure could generate the funds required to prevent a collapse of the state’s health‑care system while balancing the budget over the next decade. The outcome hinges on voter turnout and public sentiment, as the measure is set to be decided in the November 2026 election.
For the millions of ordinary Californians, the bill represents a chance to influence a policy that directly affects public services they rely on daily—a stark reminder that the state’s wealthiest are often its most powerful voters. Whether the tax passes or fails, it underscores the broader national debate over income inequality and the role of wealth in American democracy.
