California Billionaire Tax Initiative Advances To November Ballot Amid Intraparty Labor Split
The California Billionaire Tax Act officially qualified for the November 2026 ballot after sponsor Billionaire Tax Now announced formal qualification on Thursday, June 25, 2026.[1]
The initiative would impose a one-time 5% tax on Californians worth more than $1 billion to raise roughly $100 billion.[2] Ninety percent of the revenue would be earmarked for local hospitals, clinics and nursing homes hit by federal Medicaid cuts, with the rest for public education and state food assistance distributed over several years.[2] The measure was filed by SEIU-UHW but drew public opposition from the California Medical Association, Planned Parenthood Affiliates of California and some teachers and trade unions, producing a clear intraparty split.[2] Gov. Gavin Newsom said he will vote "no," called the process a single advocacy group trying to "write the state's tax code," and warned the measure could accelerate billionaires and businesses leaving California.[2] Newsom also urged a federal minimum tax on people with net worth above $100 million and proposed tighter inheritance and corporate tax rules plus a federal public equity fund to take stakes in AI companies.[3] Sen. Bernie Sanders endorsed the measure as "reasonable and necessary." Fox News
In July 2025, Congress passed H.R. 1, which cut federal Medicaid funding and reduced California's Medi-Cal support by about $30 billion a year. On October 22, 2025 SEIU-UHW leaders filed the California Billionaire Tax Act with state officials proposing the one-time 5% levy to help close that gap. By June 18, 2026 the campaign had surpassed the state's signature requirement and the initiative was formally placed on the ballot after Gov. Newsom failed to reach a deal with SEIU-UHW before the deadline.[2]
Initial coverage framed the fight as Gov. Newsom opposing a state-level wealth tax and urging a national solution.[4] Subsequent reporting highlighted significant opposition from groups that usually align with labor, including the California Medical Association and Planned Parenthood affiliates, shifting the narrative toward an intraparty split over tactics and long-run budget risks.[2]
California had about 213-214 billionaires with collective wealth near $2.18 trillion as of early 2026, a fact that fuels debate over whether a state-level levy would prompt departures even though tax studies find only small long-run migration responses among high earners.
The mainstream summary highlights the California Billionaire Tax Act as a response to significant federal cuts to Medicaid, but it does not address the scale of the wealth concentration among California billionaires, who collectively hold about $2.18 trillion, representing 27% of total U.S. billionaire wealth despite the state having only 12% of the U.S. population. This context underscores the potential revenue impact of the proposed tax, which aims to raise approximately $100 billion, a figure that seems modest compared to the wealth at stake. Furthermore, while the summary mentions opposition from various groups, it overlooks the substantial concerns raised by analysts regarding the potential migration of wealthy individuals in response to tax increases. Studies indicate that California has experienced limited net out-migration of millionaires or billionaires due to tax changes, suggesting that the fears expressed by Governor Newsom may not be as substantiated as he claims. The broader implications of wealth inequality and the structural instability of California's budget, which heavily relies on high earners, are also absent from the mainstream narrative, highlighting a significant gap in understanding the economic landscape surrounding this initiative.[5]
Show source details & analysis (4 sources)
📊 Relevant Data
California has approximately 213-214 billionaires with collective wealth of about $2.18 trillion as of early 2026, representing 27% of total U.S. billionaire wealth despite having 12% of the U.S. population.
Expert Report on the California 2026 Billionaire Tax — Institute on Taxation and Economic Policy (ITEP)
California's roughly 200 billionaires pay about 2.5% of the state's total personal income tax revenue, or around $3 billion annually.
Expert Report on the California 2026 Billionaire Tax — Institute on Taxation and Economic Policy (ITEP)
Federal changes in 2025 are projected to reduce California's Medi-Cal (Medicaid) funding by up to $30 billion per year, with potential coverage losses for 2-3.4 million residents.
Impact of Federal Funding Cuts to Medicaid (Medi-Cal) on California — California Budget & Policy Center
Administrative tax data studies of California high earners find small long-run migration elasticities in response to tax rate increases, with limited net out-migration of millionaires or billionaires attributable to state tax changes.
Expert Report on the California 2026 Billionaire Tax; Millionaire Migration in California — ITEP; Stanford Center on Poverty and Inequality
📌 Key Facts
- The California Billionaire Tax Act officially qualified for the November 2026 ballot after measure sponsor Billionaire Tax Now announced qualification on Thursday, June 25, 2026.
- In Substack posts published June 26, 2026, Gov. Gavin Newsom said he will vote “no,” criticized the initiative’s process as a single advocacy group trying to “write the state’s tax code,” and warned the measure could accelerate a billionaire and business exodus to lower-tax states.
- Newsom argued the policy should be addressed at the federal level and proposed a national minimum tax on individuals with net worth above $100 million, along with tighter rules on borrowing against stock portfolios, stricter inheritance rules, restoring pre-2017 corporate rates, and a federal public equity fund to take stakes in AI companies.
- He said revenue from those federal tax and equity proposals could be used for universal child care, free college, worker retraining and expanded health care funding.
- By June 18, 2026 the measure had well-surpassed the state’s signature requirement, and the initiative was formally placed on the ballot late Thursday, June 25, 2026 after Gov. Newsom failed to reach a deal with SEIU-UHW before the deadline.
- The proposal would levy a one-time 5% tax on California billionaires to raise about $100 billion, with 90% of funds earmarked for local hospitals, clinics and nursing homes affected by federal Medicaid cuts and 10% for public education and state food assistance, disbursed over multiple years.
- The measure prompted an intraparty split: although SEIU-UHW sponsored it, typically aligned groups — including the California Medical Association, Planned Parenthood Affiliates of California, and various teachers and trade unions — publicly opposed the proposal as a short-term fix that could increase long-run budget volatility.
- Sen. Bernie Sanders endorsed the California Billionaire Tax Act, calling it “reasonable and necessary” amid what he described as unprecedented wealth concentration.
📰 Source Timeline (4)
Follow how coverage of this story developed over time
- The article confirms that by June 18, 2026, the measure had 'well-surpassed' the state’s signature requirement and was formally solidified on the November ballot late Thursday, June 25, 2026, after Gov. Gavin Newsom failed to reach a deal with SEIU-UHW before the deadline.
- Gov. Gavin Newsom published a June 26, 2026 Substack piece explicitly criticizing the initiative’s process, saying, 'This is not how we should set California’s budget priorities,' and arguing a single advocacy group should not 'write the state’s tax code on its own terms.'
- The MS NOW piece details that the initiative would levy a one-time 5% tax on California billionaires to raise about $100 billion, with 90% of funds earmarked for sustaining local hospitals, clinics and nursing homes affected by federal Medicaid cuts and 10% for public education and state food assistance, with disbursements spread over multiple years.
- New opposition from typically aligned health and labor groups is reported: the California Medical Association, Planned Parenthood Affiliates of California, and various teachers and trade unions have publicly opposed the SEIU-UHW proposal, calling it a short-term fix that could worsen long-run budget volatility and questioning whether it reliably benefits the most vulnerable.
- The CMA Board of Trustees issued a statement, quoted in the article, warning that 'California’s health care system cannot be built on temporary revenue spikes or uncertain funding streams' and that the tax could ultimately reduce overall state revenues and deepen future shortfalls.
- The article adds that some critics and Gov. Newsom argue the state-level wealth tax risks driving billionaires out of California, reducing long-term income tax revenue, in the context of a tax system heavily reliant on high earners in the tech economy.
- On Friday, June 26, 2026, Gov. Gavin Newsom published a Substack post calling for a national minimum tax on individuals with net worth above $100 million and opposing wealth taxes implemented state-by-state.
- Newsom reiterated his opposition to California's proposed one-time 5% wealth tax on in-state billionaires, arguing that billionaires can relocate to avoid state-level levies and that "the fight belongs at the federal level."
- He additionally proposed making it illegal for the ultra-wealthy to fund lifestyles by borrowing against stock portfolios without paying tax, tightening inheritance tax rules to avoid a "permanent American aristocracy," and restoring corporate tax rates to pre-2017 Trump tax-cut levels.
- Newsom called for the U.S. government to take significant equity stakes in artificial intelligence companies through a national public equity fund so that "every American" would own a piece of AI-driven economic gains.
- He suggested that revenue from these federal tax and equity proposals could be used for universal child care, free college, worker retraining and expanded health care funding.
- On Thursday, June 25, 2026, measure sponsor Billionaire Tax Now announced that the California Billionaire Tax Act had officially qualified for the November ballot.
- Gov. Gavin Newsom published a Substack post on the night of June 25, 2026, stating he will vote 'no' on the initiative and warning it could accelerate a billionaire and business exodus from California.
- Newsom argued that billionaire taxation should be handled through a federal tax rather than state-by-state measures and, in a June 25 X post, called for a national billionaire tax as part of what he termed 'a new social contract.'
- Newsom’s posts explicitly cite the ability of billionaires to move to lower-tax states like Texas or Florida and list prior departures of wealthy residents such as Elon Musk, Larry Page and Larry Ellison as evidence of mobility risks.
- Sen. Bernie Sanders has endorsed the California Billionaire Tax Act as 'reasonable and necessary' given what he calls unprecedented wealth concentration.