California Billionaire Tax Faces Defeat as Voters Reject Proposition 40

California voters appear poised to reject Proposition 40, a proposed one-time 5% tax on billionaire wealth, following an expensive election campaign that exposed divisions among Democrats and intensified debate over economic inequality. Results reported November 5 showed approximately 56% opposing the measure and 44% supporting it, although millions of ballots remained uncounted.

The initiative would have applied to California residents and trusts holding assets worth more than $1 billion as of January 1, 2026. According to election coverage by the Los Angeles Times, the proposal targeted approximately 200 billionaires and was expected to generate about $100 billion.

Under the proposal, 90% of the revenue would fund healthcare, while the remaining 10% would support education, food assistance and tax administration. Supporters presented the measure as a potential response to an estimated $100 billion shortfall in federal funding for California's Medi-Cal healthcare program.

The campaign became one of California's most expensive ballot-measure battles. According to California Secretary of State filings cited by the Los Angeles Times, approximately $489 million was raised in connection with Proposition 40 and competing Propositions 41 and 42. More than $380 million went toward defeating the billionaire tax, compared with approximately $100 million contributed by supporters.

Google co-founder Sergey Brin reportedly contributed $102 million to a political committee opposing the proposal. An analysis by the Los Angeles Times also found that Brin, Nvidia Chief Executive Jensen Huang, Google co-founder Larry Page and Meta Chief Executive Mark Zuckerberg would collectively account for approximately 40% of the estimated tax revenue.

Political analyst Dan Schnur, a professor at USC, UC Berkeley and Pepperdine, said the proposal struggled despite widespread Democratic support for healthcare funding.

"In a deep blue state like California, most voters are going to support additional funding for healthcare, especially to replace Trump funding cuts. But in retrospect, the sponsors may wish they've been a little bit less ambitious," Schnur said.

Opposition extended beyond wealthy technology executives. Gov. Gavin Newsom, teachers' unions, Planned Parenthood, business organizations and other labor groups opposed the measure, raising concerns about economic competitiveness and the possibility of wealthy residents relocating.

Newsom argued that California's economic position could suffer if the state adopted the tax independently of other states. He also cited concerns about its one-time revenue structure and potential consequences for regular state income-tax collections.

"The firefighters opposed it. The teachers opposed it. Planned Parenthood opposed it.

The vast majority of labor opposes it. I think the majority of Californians oppose it. So, we all have our reasons why," Newsom said in an interview with Fox News Digital.

He also questioned the initiative's design and warned that its consequences were already influencing decisions about remaining in California.

"I don't think it's a good idea to do [it] at a state level. It's a badly written initiative. It focuses just on one part of the state's budget.

It's one-time money and the impact is already being felt. People have left the state," Newsom said.

Newsom distinguished between imposing a wealth tax at the state and national levels, indicating that his position could differ if the policy were implemented federally.

"Looking at that from a national prism, very different conversation than a state-by-state prism. That's been the debate in California. I think the majority of Californians see that distinction even though they absolutely believe that we need a new tax bracket in this country," Newsom said.

Richard Stern, an economics scholar at Advancing American Freedom, argued that supporters underestimated the complexity of billionaire wealth, much of which is tied to business ownership and investments rather than readily available cash.

"The left looks at a billionaire, and they assume that they're sitting on $10 billion, $100 billion in cash. I hate to break it to them: There's no cash," Stern said.

He pointed to the industrial assets and infrastructure underlying large corporations as examples of wealth that cannot easily be converted into cash.

"They have no idea that we're talking about a trillion-dollar company, we're talking about a trillion dollars' worth of factories and warehouses and delivery trucks and machinery," Stern said.

The California Democratic Socialists of America supported Proposition 40, describing it as a way to redirect concentrated wealth toward public services. Its campaign materials argued that billionaires' annual wealth growth could absorb the proposed levy.

"We have the money in California to pay for the quality schools and healthcare that we need. It just needs to be transferred from the wrong pockets to the right ones. We can do that by taxing the rich," the organization's campaign presentation stated.

The organization's materials described the proposal as a temporary tax affecting approximately 250 Californians with combined wealth of $2 trillion.

"It calls for a temporary 5% wealth tax on just 250 Californians — the very richest people in the state — who together own $2 trillion in wealth," its materials stated.

The presentation also argued that the levy would reduce the growth of billionaire fortunes rather than eliminate their wealth.

"Let's be clear: if the Billionaire Tax passes, none of the billionaires will actually lose money. They have been averaging a growth rate of 7 or 8 percent per year in their wealth. Thus, a 5% hit doesn't even cut into what they have; it just slightly slows down the growth of that wealth," the presentation stated.

Meanwhile, Brian Galle, a UC Berkeley law professor who helped draft Proposition 40, questioned the ability of ordinary campaign messaging to compete with the financial influence of billionaires.

"When billionaires have half a dozen different strategies for buying this election, it shows that they already have too much money and pay too little back," Galle said.

Schnur also emphasized that the opposition's broad coalition helped undermine the initiative beyond its financial advantage.

"As important as the money was to beat Prop. 40, the coalition against it may have been just as important. You didn't see Sergey. You didn't see tech billionaires in the ads. You saw teachers and nurses and firefighters," Schnur said.

Two competing ballot measures further complicated the initiative's prospects. Proposition 42, which would restrict new state taxes on personal assets, retirement holdings and certain savings, appeared headed for approval. Proposition 41, which proposed additional audits for new state special taxes, was trending toward defeat.

Nathan Click, a spokesperson for Proposition 42, said the measure had attracted support from several groups concerned about protecting personal savings.

"They didn't just reject a single bad tax idea — millions of Californians backed the strongest protections available to protect their hard earned life savings from double taxation. They joined firefighters, law enforcement officers, building trades workers, seniors, veterans and small businesses in doing so," Click said.

The debate is also extending beyond California. In Washington state, voters supported a proposed 9.9% income tax on household earnings exceeding $1 million annually. Colorado voters were considering replacing the existing 4.4% flat income-tax rate with a graduated system reaching 8.4% on income above $1 million.

Nationally, Democratic lawmakers are considering higher taxes on wealthy households alongside tax reductions for middle- and lower-income taxpayers. Tax Policy Center nonresident fellow Howard Gleckman described the emerging direction of the party's proposals.

"It is clear Democrats will try to lower taxes for middle-income households and raise taxes on certain businesses and high-income households. But it is much too soon to know how," Gleckman said.

Proposals previously introduced by Senators Chris Van Hollen and Cory Booker include higher income-tax rates for millionaires. Van Hollen's plan would introduce a graduated surtax beginning at 5% for annual earnings between $1 million and $2 million, increasing to 12% for income exceeding $5 million. It would also increase the top capital-gains tax rate from 23.8% to 35.8%.

Booker's proposal would raise the top income-tax rate to 43% while increasing the standard deduction to $37,500 for single filers and $75,000 for joint filers.

Garrett Watson, vice president of federal tax policy at the Tax Foundation, said lawmakers would need to balance tax reductions against government revenue requirements.

"A key question is the debate about how much to prioritize further cuts at all, given the revenue needs for the deficit situation and the Democrats' spending priorities," Watson said.

Federal wealth-tax proposals could also gain attention. Rep. Ro Khanna and Sen. Bernie Sanders have backed the Make Billionaires Pay Their Fair Share Act, which proposes an annual 5% tax on the net worth of individuals possessing more than $1 billion, unlike California's one-time proposal.

However, President Donald Trump would likely veto Democratic tax legislation, particularly proposals targeting tax cuts enacted in 2017 and subsequently extended and expanded. The Tax Foundation said proposals introduced in 2027 could nevertheless influence discussions surrounding the 2028 election.

California's Proposition 40 remained without a final official result as election officials continued counting outstanding ballots on November 5, 2026.