California’s radical billionaire tax is barreling onto the November ballot, exposing how far blue-state politicians will go to rewrite basic rules of property and the Constitution.

Story Snapshot

• A union-backed measure would impose a one-time 5% tax on roughly 200 California billionaires’ total assets.
• The tax applies to anyone who was a California resident on Jan. 1, 2026, raising major constitutional and property-rights concerns.^[12]
• Supporters claim it will raise up to $100 billion for healthcare, schools, and food assistance, but that figure is not independently verified.^[12]
• Gov. Gavin Newsom failed to cut a deal to stop the initiative, so voters will now decide whether to approve this wealth grab.^[3][12]

What The Billionaire Tax Would Actually Do

The November measure, called the 2026 Billionaire Tax Act, would levy a one-time 5% tax on the net worth of Californians whose assets exceed $1 billion.^[12] That means stocks, business ownership, and other wealth get tallied, not just income. Proponents estimate it would hit about 200 ultra-wealthy residents and could be paid over five years.^[12][14] The text of the initiative creates a special Billionaire Tax Reserve Fund, with 90% of the money locked into healthcare and 10% for education and food aid.^[12][13]

Backers, led by the Service Employees International Union–United Healthcare Workers West, say Congress and an earlier Trump-era healthcare bill cut about $100 billion from California’s safety net, and this tax is their “emergency” fix.^[3][7] They argue billionaires “benefitted most from California’s resources” and should recalibrate the “social contract” by paying more.^{[4][6][13][16]} Early union messaging brands the tax as a one-time hit, not an annual wealth levy, hoping other blue states copy the model.^[4]

Retroactive Taxing And Constitutional Red Flags

The most alarming part of the proposal for property-rights defenders is its retroactive design. The measure says anyone who was a California resident as of January 1, 2026 owes the tax, even if they already moved away.^[12][4][15] Supporters insist this kind of resident-based taxation on worldwide assets follows “standard practice” and has been upheld by courts, and they try to dodge California’s Proposition 13 limits by labeling it an excise tax on extreme wealth.^[15][16] Yet legal experts warn the retroactive date invites serious due process and constitutional challenges.^[12][3]

The initiative also amends the state constitution to allow taxation of “all forms of personal property and wealth, whether tangible or intangible,” including stock shares, bonds, and other interests.^[13][14] Real estate directly held is excluded, but most other assets are fair game.^[15][16] Once government claims a right to reach into accumulated wealth this way, critics fear the threshold could drop over time as politicians chase more revenue.^[20] Even some Democrats and union leaders say the plan would destabilize an already volatile tax base that relies heavily on high earners.^[8][20]

Newsom’s Failed Deal And The Split On The Left

Governor Gavin Newsom has railed against the billionaire tax for months, calling it a plan that “makes no sense” and predicting “overwhelming opposition” once voters learn the details.^[1][2] He argues the measure would hamstring key industries and topple a pillar of California’s tax base, warning that wealthy residents are already leaving and taking their tax dollars with them.^[3][8] However, he has admitted he cannot veto a direct ballot initiative, so his only path was to try to keep it off the ballot.^[6][7]

Newsom pushed for a smaller, negotiated tax in the legislature, reportedly exploring a scaled-down 2% wealth hit in exchange for unions pulling the 5% measure.^[16][3] Union leaders rejected that compromise, turned in more than 1.5 million signatures, far above the roughly 900,000 needed, and forced the measure onto the November ballot.^[5][12] The fight has exposed deep fault lines among Democrats: progressive lawmakers, the healthcare union, and groups like Democratic Socialists back the tax, while major players such as the California Teachers Association and Planned Parenthood oppose it as unstable and too narrow in focus.^[1][8]

Uncertain Numbers And Real-World Risks For Ordinary Families

Supporters’ headline promise is up to $100 billion in new money for healthcare, schools, and food assistance.^[5][7][12] Yet no fully independent, nonpartisan audit has confirmed that figure. A joint look by the state’s legislative analyst and the governor’s finance team said the tax could raise “tens of billions” but also warned of long-term revenue losses if billionaires move away or shift assets.^[2][14] Critics note that the initiative’s own expert report excludes some assets and allows certain exemptions, making exact forecasts even harder.^[15][16]

Polling is mixed. Proponents cite early surveys with support around 50–52%.^[12][14] Other polling shared on local television suggests support has slipped below 50%, and undecided voters lean against the tax once they hear how it works.^[16] For regular Californians and for conservatives nationwide, the pattern is familiar: start with “only billionaires,” then watch the tax base erode, revenue miss the target, and pressure mount to lower the threshold.^[20] As some observers warn, if California normalizes taxing wealth itself rather than income, other deep-blue states could copy the move, opening a new front in the battle over property rights, constitutional limits, and government reach into family finances.^[8][19]

The billionaire wealth tax proposal will appear before California voters in November, after failed efforts by Gov. Gavin Newsom and allies to persuade the union behind the tax to withdraw it.

More from me and @pkwsj: https://t.co/bqTQzK6wCN

— Laura J. Nelson (@laura_nelson) June 26, 2026

Sources:

[1] Web – Gavin Newsom fails to stop California’s controversial billionaire tax …

[2] Web – Gavin Newsom vowed to stop California’s billionaire tax. He has days …

[3] Web – Newsom Vows to Stop Proposed Billionaire Tax in California

[4] Web – Gavin Newsom opposes California ‘billionaire tax’ as he eyes 2028 …

[5] Web – Gavin Newsom comes out swinging against California billionaire tax

[6] Web – Newsom Vows Fight Against Billionaire’s Tax

[7] Web – Gavin Newsom’s anti-Zohran moment: the California billionaires tax

[8] Web – Gavin Newsom moves to neutralize tax on billionaires

[12] Web – [PDF] 25-0024A1 (Billionaire Tax) – California Department of Justice

[13] Web – Update on the California 2026 Billionaire Tax Act – Baker Botts

[14] Web – Expert Report on the California 2026 Billionaire Tax: Revenue …

[15] Web – [PDF] Expert Report On The California 2026 Billionaire Tax: Revenue …

[16] YouTube – California’s billionaire tax qualifies for the November election but …

[19] Web – Proponents of the Billionaire Tax Act say they have collected nearly …