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California’s Proposition 40: The High-Stakes Billionaire Tax Vote

By Drooid · · How we work

Core Event

Proposition 40 proposes a one-time 5 % tax on the wealth of roughly 200 California billionaires, with proceeds earmarked for federal Medi-Cal cuts. Early voting has begun, and the measure faces a massive, well-funded opposition campaign while supporters mobilize a grassroots voter-turnout effort.

Background & Context

California’s tax landscape has evolved from the 1978 Proposition 13, which capped property taxes, to a 13 % state income tax on millionaires enacted in 2012 and set to expire in 2030. The current initiative follows a series of attempts to raise revenue from high-income earners and arrives amid national debates over wealth taxation.

Key Figures & Groups

  • Sen. Bernie Sanders – national champion of the tax.
  • Rep. Ro Khanna – co-campaigner with Sanders, critic of Gov. Gavin Newsom.
  • Gov. Gavin Newsom – opposes the measure, favoring a national billionaire tax.
  • Brian Galle – co-author of Proposition 40.
  • Jensen Huang – Nvidia CEO, expressed indifference.
  • Steven Fenaroli – California Farm Bureau spokesperson.
  • David Lesperance – tax lawyer for relocating billionaires.
  • Suzanne Jimenez – SEIU-UHW chief of staff.

Data & Statistics

  • The initiative would affect about 200 of the state’s billionaires.
  • Anti-tax group Building a Better California has raised over $252 million, including $102 million from Sergey Brin, $30 million from John Doerr, and $27 million from Eric Schmidt.
  • Labor coalition SEIU-UHW contributed roughly $4 million.
  • The Legislative Analyst’s Office projects tens of millions in short-term revenue, with possible future declines in income-tax collections.
  • A Hoover Institution study warns the tax could trigger a $25 billion loss in state revenue if billionaires relocate.
  • Opponents have spent over $200 million on anti-Prop 40 advertising.

Official Statements & Responses

Senator Sanders questioned whether a ballot initiative can succeed when “a handful of billionaires” are spending “over $200 million” against it. Governor Newsom called the tax “poorly written” and warned it could harm California’s economy. Hoover Institution economists warned it could drive wealth out of the state, reducing revenue rather than increasing it.

Criticism & Opposition

  • Gov. Newsom argues the tax could harm the state’s economy.
  • Hoover Institution economists predict a $25 billion revenue loss.
  • California Farm Bureau warns of a “slippery slope.”
  • Labor groups such as the California Teachers Association and California Professional Firefighters oppose the measure, citing fiscal stability concerns.
  • Tech leaders like Jensen Huang said he is “perfectly fine” with any taxes applied.

Conflicting Reports & Gaps

  • Revenue projections diverge: Hoover forecasts a $25 billion loss, while the Legislative Analyst’s Office expects only “tens of millions” in short-term gains.
  • Labor support is split: the California A.F.L.–C.I.O. endorses the initiative, while other SEIU and A.F.L.–C.I.O. bodies remain silent, and the California Teachers Association opposes it.
  • No definitive data exist on how many billionaires might actually relocate if the tax passes.

Verbatim Quotes

  • “Proposition 41 and Proposition 42 are hilariously cynical,” — Brian Galle.
  • “In America today, is it possible for a ballot item to win when it is being opposed by a handful of billionaires who are spending over $200 million?” — Sen. Bernie Sanders.

What’s Next

Early voting continues as both sides intensify advertising and ground-level organizing. The final ballot count will determine whether Proposition 40 passes, and if so, whether it will be overridden by competing initiatives Proposition 41 or Proposition 42.