Full Breakdown
Proposition 40: California’s One-Time Billionaire Wealth Tax
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Core Event – Measure Details
Proposition 40, appearing on the November 3, 2026 ballot, would impose a one-time 5 percent tax on the net worth of individuals and trusts whose assets exceed $1 billion. The tax applies to those who were California residents on January 1, 2026. Real-estate, pensions and retirement accounts are generally excluded. Taxpayers could spread payment over five years, but would incur a higher total cost. Ninety percent of projected revenue would be earmarked for health-care programs; the remaining ten percent would support education and food-assistance initiatives.
Background & Context – Origins and Related Measures
The initiative was drafted by the Service Employees International Union – United Healthcare Workers West (SEIU-UHW) and other labor groups, positioning the tax as a response to federal cuts that they say threaten California’s health-care system. Two companion measures, Proposition 41 and Proposition 42, qualified for the same ballot to limit or block the wealth tax if it passes.
Data & Statistics – Scope, Revenue, and Campaign Finance
- Affected taxpayers: roughly 200–250 California residents, according to supporters.
- Revenue projection: the Legislative Analyst’s Office (LAO) estimates “tens of billions of dollars,” while supporters cite a potential $100 billion haul.
- Allocation: 90 % to health-care, 10 % to education and food assistance.
- Polling (2026):
- Citrin-POLITICO: 46 % support, 43 % oppose.
- Independent Voter Project: 40 % support, 38 % oppose.
- UC Berkeley Institute of Governmental Studies: 45 % support, 42 % oppose.
- Campaign spending (as of late September): opponents have raised > $130 million; supporters have raised ? $33 million. Countermeasure committees have contributed > $186 million to Props 41/42, while their opponents have raised about $2.75 million.
Official Statements & Responses
- The Legislative Analyst’s Office describes the tax as a 5 percent levy on net worth for residents as of Jan 1 2026 and notes that real estate, pensions and retirement accounts are excluded.
- Governor Gavin Newsom warned that the tax could prompt billionaires to leave the state, reducing both the wealth-tax base and ongoing income-tax revenues.
Conflicting Reports & Gaps
- Revenue estimates diverge: the LAO’s “tens of billions” versus supporters’ “up to $100 billion.”
- Poll results vary slightly across three surveys, though all show a split electorate with support hovering just below a majority.
- Timing of collections remains uncertain; the LAO notes difficulty predicting when funds will be received because much wealth is tied to fluctuating stock prices.
What’s Next – Election and Countermeasures
Voters will decide on Proposition 40, along with Propositions 41 and 42, on November 3, 2026. If either countermeasure passes, it could nullify or limit the wealth tax even if Proposition 40 receives a majority. Stakeholders are expected to intensify outreach and advertising in the weeks leading up to the election.