California Proposition 40 results: California voters have rejected a proposed one-time 5% wealth tax on billionaires, ending a high-profile campaign to make the state the first in the nation to impose this type of tax on its wealthiest residents. The Associated Press reported that the measure lost by approximately 52.8% to 47.2%, delivering a major setback to supporters who argued the money could help protect healthcare and education funding.
California Proposition 40 Election Results: What Happened?
California voters rejected Proposition 40 in the November 2026 election after a closely watched campaign involving labor unions, wealthy technology investors, healthcare organizations and political leaders.
According to the Associated Press results reported by CalMatters, approximately 52.8% of voters opposed the proposal, while 47.2% supported it. The measure had remained behind during several days of vote counting before the Associated Press called the result on November 9.
The defeat means California will not introduce the proposed billionaire wealth tax through this ballot measure. It also represents a significant setback for supporters who viewed the proposal as a way to raise substantial revenue for public services.
The campaign attracted national attention because it raised a major question about how states should fund healthcare and other public programs when federal support faces reductions.
The result also exposed divisions among California Democrats. Some supported taxing the wealthiest residents to protect public services, while others warned that the proposal could damage the state’s economy and tax revenue.
What Was California Proposition 40?
Proposition 40 was a proposed one-time tax targeting certain California taxpayers and trusts with assets valued above $1 billion.
The measure sought to impose a 5% tax on qualifying wealth, including financial holdings. Supporters argued that billionaires had benefited significantly from the state’s economy and could contribute more toward funding healthcare and education.
Unlike a recurring annual wealth tax, the proposal was designed as a one-time tax. However, its provisions included financial assets and a retroactive tax date, which became major points of disagreement during the campaign.
The California Secretary of State’s official voter guide described the proposal as a 5% tax on certain taxpayers with assets exceeding $1 billion. It projected a temporary revenue increase of tens of billions of dollars over several years, while also warning of a possible ongoing reduction in income tax revenue from billionaires.
Supporters presented the measure as an opportunity to protect essential public services. Opponents questioned whether the state could collect the expected money without encouraging wealthy residents to relocate or change their financial arrangements.
The official measure details are available through the California Secretary of State’s Proposition 40 guide.
Why Supporters Wanted a Billionaire Wealth Tax
The main organization supporting Proposition 40 was Service Employees International Union-United Healthcare Workers West, commonly known as SEIU-UHW.
The union argued that California needed new funding to respond to healthcare pressures following federal legislation that reduced or threatened funding for important health programs.
Supporters said the proposed tax could generate approximately $100 billion for healthcare and education. That figure was part of the campaign’s argument for the measure, rather than a guaranteed amount of revenue.
The proposal also received support from Senator Bernie Sanders, who has frequently advocated higher taxes on wealthy Americans.
Supporters said the money could help maintain access to healthcare, support hospitals and protect services for lower-income residents. They also argued that billionaires could afford a one-time contribution without facing the same financial pressure as ordinary households.
For healthcare workers and labor organizations, the campaign became part of a broader debate about how California should respond to possible federal funding reductions.
However, the proposal faced strong resistance from technology investors, business groups and other opponents who questioned its economic consequences.
Billionaire Tax Opposition and Campaign Spending
The campaign against Proposition 40 became one of the most expensive parts of California’s 2026 ballot fight.
CalMatters reported that opponents spent approximately $378 million in efforts to defeat the proposal. The opposition included wealthy technology investors and organizations concerned about the potential effects of a wealth tax on California’s economy.
The Associated Press also reported that the main opposition committee raised more than $333 million. Google co-founder Sergey Brin was among the major financial contributors to the opposition campaign.
Opponents argued that a 5% tax on billionaire wealth could encourage wealthy residents to leave California or move financial assets elsewhere. They warned that the state could eventually lose income tax revenue if major taxpayers changed their residency.
Their campaign also raised concerns about the difficulty of valuing private businesses, investment holdings and other assets.
Evan Westrop, a strategist for the campaign opposing Proposition 40, described the measure as a risky experiment with potential consequences for the state’s economy.
The disagreement was not simply about whether billionaires should pay more taxes. It also involved questions about how wealth should be calculated, how a one-time tax would be collected and whether California could protect its long-term tax base.
The result suggests that opponents successfully persuaded a majority of voters that the proposed tax carried risks they were unwilling to accept.
Proposition 42 Could Affect Future Wealth Tax Plans
Another important part of California’s 2026 election was Proposition 42, a competing measure involving restrictions on future state taxes on personal property and financial assets.
Proposition 42 sought to prohibit new state taxes on certain personal property, including financial assets such as stocks and investment accounts. It also addressed most retroactive state taxes.
Those provisions directly conflicted with important parts of Proposition 40, which sought to tax financial holdings and apply the measure retroactively.
According to KQED’s Associated Press-based election results updated on November 10, Proposition 42 was leading with approximately 51.5% support and 48.4% opposition, with about 89% of the vote counted at that update.
That result was still based on an ongoing count, rather than a final certified statewide result. If Proposition 42 passes, its restrictions could make future attempts to introduce a similar wealth tax more difficult.
The relationship between the two propositions is important. Even if supporters return with another billionaire tax proposal, they may face additional legal and constitutional challenges depending on the final outcome of Proposition 42.
Voters therefore considered two competing approaches: whether California should impose a tax on billionaire wealth and whether the state should restrict certain future taxes on financial assets.
What Happens After Proposition 40’s Defeat?
The immediate consequence is that California will not collect the proposed one-time billionaire wealth tax through Proposition 40.
However, the debate over healthcare funding is not over. California still faces pressure to identify ways to support healthcare services and other public programs as federal funding changes affect state budgets.
SEIU-UHW leaders indicated that they could return to the issue in 2028 if the California Legislature fails to provide what the union considers a meaningful solution for healthcare funding.
Dave Regan, president of SEIU-UHW, said the union’s plan to consider another effort was not hypothetical.
That statement signals that the 2026 defeat may not end the campaign for higher taxes on billionaires. However, any future proposal would need to address the concerns that contributed to the rejection of Proposition 40.
Lawmakers may also explore other funding options, including changes to existing tax policies, adjustments to public spending or alternative healthcare financing strategies.
For California residents, the key question will be how the state balances public service funding with economic competitiveness and the need to maintain a reliable tax base.
What the 2026 Vote Means for California’s Economy and Tax Policy
The rejection of Proposition 40 sends an important message about the limits of public support for a new wealth tax, even in a state known for progressive tax policies.
California has a large technology sector and a significant concentration of wealthy business owners and investors. That makes debates over wealth taxation particularly important to the state’s long-term economic outlook.
Supporters believe taxing the richest residents could help address inequality and protect essential services. Opponents argue that aggressive wealth taxation could encourage investment and high-income taxpayers to move elsewhere.
Both sides raised concerns about California’s financial future, but they offered different solutions.
The election also showed that support for public healthcare funding does not automatically translate into support for every tax proposal designed to pay for it.
The final outcome could influence future discussions in other states considering similar tax policies. Lawmakers elsewhere may study California’s campaign, its fundraising totals and the concerns voters raised before introducing their own proposals.
For now, the 2026 election has delivered a clear political setback for the billionaire wealth tax movement in California.
Frequently Asked Questions
1. Did California voters reject Proposition 40 in 2026?
Yes. California voters rejected Proposition 40. The Associated Press reported that approximately 52.8% voted against the measure and 47.2% supported it.
2. What was Proposition 40 in California?
Proposition 40 proposed a one-time 5% tax on certain California taxpayers and trusts with assets valued above $1 billion.
3. How much money could the billionaire tax have raised?
Supporters argued that the measure could generate approximately $100 billion for healthcare and education. The state’s official voter guide described the potential temporary revenue increase as tens of billions of dollars over several years.
4. Why did opponents campaign against Proposition 40?
Opponents warned that the tax could encourage billionaires to leave California, reduce future income tax revenue and create challenges in valuing financial assets and private businesses.
5. Could California try another billionaire tax in 2028?
SEIU-UHW leaders said they could consider another attempt in 2028 if state lawmakers do not provide an alternative solution for healthcare funding. Any new proposal would face political and legal questions.
6. What is Proposition 42, and how is it connected to Proposition 40?
Proposition 42 sought to restrict certain new state taxes on personal property and financial assets, as well as most retroactive taxes. Its provisions conflict with important elements of Proposition 40. The latest reported count showed Proposition 42 leading, but the results were not yet certified.
7. Does the rejection mean California will not tax billionaires in the future?
No. It means this specific proposal failed. Future tax proposals could still be introduced, although they may face legal, political and economic challenges.
News Sources and References
- CalMatters: California voters reject Proposition 40 billionaire tax.
- Associated Press: California voters reject the proposed billionaire wealth tax.
- California Secretary of State: Official Proposition 40 voter guide.
- KQED: California 2026 election results and Proposition 42 vote count.
Editorial Note: Election percentages and Proposition 42 figures reflect reported results available on November 10, 2026. Vote counts may change as additional ballots are processed and results are certified.