California Proposition 40 (2026), explained

This was on the California ballot on Tuesday, November 3, 2026. No recommendation, just what it does and both sides.

Results are still being counted. Check back soon.

Proposition 40Amendment and state law · Citizen initiative

One-time billionaire wealth tax

Explain it like I'm 5

Certain people and trusts with more than $1 billion in covered wealth would pay a 5% tax once. The money would go to health care, food assistance, and schools.

Yes vote

California would impose the proposed one-time 5% tax on covered wealth above the stated threshold and direct the money to health care, food assistance, and public education.

No vote

California would not impose the proposed one-time wealth tax.

The question to ask yourself

Is a large one-time tax on very wealthy taxpayers worth the valuation and possible migration risks?

The case for

  • It could provide a large temporary source of money for health care, food assistance, and education.
  • The tax would be focused on taxpayers with extremely large covered assets.
  • Supporters say the revenue could help replace funding lost through federal health care cuts.

Backed by: U.S. Senator Bernie Sanders, SEIU United Healthcare Workers West

The case against

  • Valuing private or illiquid assets could be difficult and lead to disputes.
  • Wealthy residents could leave, reducing future income-tax revenue.
  • One-time revenue could create pressure to maintain programs after the money ends.

Opposed by: California Primary Care Association, California School Boards Association, California Taxpayers Association, Building a Better California

Money
The state estimates temporary revenue in the tens of billions of dollars over several years, with possible ongoing income-tax losses below $1 billion annually. [Official analysis](https://lao.ca.gov/BallotAnalysis/Proposition?number=40&year=2026)
Don't be misled
Calling it a permanent annual wealth tax is misleading because the proposal is a one-time levy, although payments may be spread over several years.

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Written by ChatGPT, Claude, Gemini and Grok with web search, then checked against each other. See where they disagreed on California. Your sample ballot and the official voter guide are the final word. Look up your sample ballot.

Also on the California ballot

  1. Proposition 1Housing and veterans bonds
  2. Proposition 2Bigger rainy day fund
  3. Proposition 3Permanent high-income tax
  4. Proposition 4Allow public campaign funding
  5. Proposition 5Change recall replacement rules
  6. Proposition 37Second mortgages for new homes
  7. Proposition 38Immunotherapy research bonds
  8. Proposition 39Voter ID and citizenship checks
  9. Proposition 41Spending limits and tax audits
  10. Proposition 42Ban new taxes on personal savings
  11. Proposition 43Two-thirds vote for local taxes
  12. Proposition 44Clinic mission-spending requirement
  13. Proposition 45Faster reviews for essential projects