Full Breakdown
Billionaire Opposition to California’s Proposed Wealth Tax: Funding, Strategy, and Internal Rift
8/22/2026, 4:11:12 AM
Core Event – Billionaires Mobilize Against Proposition 40
A coalition of ultra-wealthy donors is spending more than $150 million to defeat Proposition 40, a ballot initiative that would impose a one-time 5 % tax on the net worth of California residents whose wealth exceeds $1 billion as of Jan. 1, 2026. The effort is organized through Building a Better California, which also backs counter-initiatives (Propositions 41 and 42) designed to nullify the wealth tax if it passes.
Background & Context – Proposition 40 and Counter-Measures
Proposition 40, championed by the Service Employees International Union United Healthcare Workers West and supported by Democratic lawmakers such as Rep. Ro Khanna, aims to raise “tens of billions of dollars” for public services. The Legislative Analyst’s Office estimates the tax would affect a few hundred individuals. Building a Better California qualified two competing measures: Proposition 41, requiring state audits of programs funded by new special taxes, and Proposition 42, outlawing retroactive taxation.
Timeline
- Early 2026 – Billionaires begin pooling resources in a private chat that includes Brin, Larsen, Marc Andreessen and Brian Armstrong.
- Mid 2026 – Building a Better California raises $150 million; $87 million is allocated to fall advertising.
- June 2026 – The California Democratic Party’s executive board narrowly endorses Proposition 40, prompting internal tension within the billionaire coalition.
- August 2026 – Reports surface of Schmidt’s frustration and of the coalition’s split over funding allocations and strategy.
Data & Statistics
- Total contributions to the anti-tax effort exceed $150 million.
- Brin’s contribution is $102 million; Schmidt’s is just over $3 million.
- Additional billionaire donors: Doerr $7.5 million, Larsen $10 million, Collison $7 million.
- Building a Better California has purchased $87 million of advertising time for the fall campaign.
- Market pricing shows a 25.5 % “YES” probability for Proposition 40, down from 30 % a week earlier (cryptobriefing, Nov 3 2026 election).
Official Statements & Responses
An adviser to Democratic lawmakers said the party’s endorsement places legislators in a “tricky position” for public commentary.
Criticism & Opposition – Internal Disagreement
Schmidt’s advisor reported that Schmidt is “frustrated” because funds are also being used for unrelated initiatives such as Proposition 45, and because the Democratic Party’s endorsement undermined the coalition’s effectiveness. Some donors have begun reallocating money, questioning the group’s strategy and citing unmet promises that Brin had allegedly made about the counter-measures’ impact on signature costs and negotiations with Gov. Gavin Newsom.
Conflicting Reports & Gaps
- Funding Figures: Fortune cites “over $100 million” from Brin, while sfstandard specifies $102 million; cryptobriefing aggregates contributions to “over $156 million.” The precise total remains unclear.
- Future Strategy: Sources differ on whether additional billionaire donors will continue to fund Building a Better California or shift to other political causes, leaving the coalition’s long-term cohesion uncertain.
What’s Next – Election Outlook
The market for Proposition 40 reflects a declining probability of passage (25.5 % YES) as of the latest pricing data tied to the Nov 3 2026 election. Polling trends and final advertising pushes by both the billionaire coalition and the “No on 40” alliance will shape the final voter decision.
