California Proposition 40: What the billionaire wealth tax is about

The plan on the ballot

California is about to change the game. This November, voters will decide on Proposition 40, a proposal that would impose a one-time, 5% state tax on the net worth of California’s ~200 billionaires. The goal? Raising $100 billion over five years to plug major holes in the state’s healthcare system.

Why is this happening?

Dave Regan, the leader of the SEIU United Healthcare Workers West union, says the state is in an emergency. He claims that President Trump’s "One Big Beautiful Bill" involves federal Medicaid cuts that could cause 3.5 million people to lose their insurance and lead to hospital closures. The union is pushing for Prop 40 to bridge that gap. While Regan admits it isn't a permanent fix, he argues it's a necessary lifeline.

The drama and the opposition

It’s giving major tension. Some big names are already fleeing California, including Peter Thiel, Larry Page, and Sergey Brin. Brin is reportedly pouring over $100 million into the "no" campaign.

The plot thickens because there are two other measures on the ballot—Propositions 41 and 42—that are backed by opposition groups. If those get more votes than Prop 40, they effectively cancel the wealth tax out. Even some Democrats, like Governor Gavin Newsom and former Congresswoman Katie Porter, are against it. Porter, while progressive, says the tax is "flawed" and warns that once billionaires leave, the state can't tax them anymore.

An outlier’s perspective

Nvidia CEO Jensen Huang is the rare billionaire who isn't dodging the question. Despite being one of the world’s richest people, he says he’s "not afraid of paying taxes" and views the ability to contribute as a privilege.

Why it matters

For you, this is highkey important because it marks a massive experiment in tax policy. If it passes, it could set a precedent for other states. As Boston College Law professor Ray Madoff noted, while federal change is what’s really needed, Prop 40 is a major symbolic stand against a system where the ultra-wealthy often pay little to nothing. It's a high-stakes tug-of-war between funding public services and keeping the state’s biggest earners from dipping.