Billionaire one-time wealth tax passes in California election 2026?

- [2026-06-17] The California Secretary of State certified the billionaire wealth tax initiative for the November 3, 2026 ballot as Proposition 40, after it submitted 980,438 valid signatures, well above the ~874,641 required. The secretary of state reported on June 17 that at least 980,438 of the more than 1.6 million signatures filed were valid, qualifying the ballot initiative. - [2026-06-18] Negotiations between Gov. Newsom and SEIU-UHW to replace the 5% tax with a smaller 2% legislative levy collapsed before the June 25 withdrawal deadline. SEIU-UHW offered to abandon the 5% wealth tax proposal if Newsom supported a smaller 2% levy on billionaires passed by the state legislature; Newsom quickly rejected the amended proposal, negotiations stalled before the June 25 withdrawal deadline, and the initiative was certified for the November ballot. - [2026-10-11] The California Secretary of State's official Voter Information Guide confirms Prop. 40 is live on the ballot: a one-time 5% tax on net worth over $1 billion, with 90% of revenue for health care and 10% for food assistance/education; supporters include Sen. Bernie Sanders and SEIU-UHW, opponents include the California Taxpayers Association, CTA, California Medical Association and others (https://voterguide.sos.ca.gov/propositions/40/index.htm). - [2026-09-24] Two billionaire-funded counter-measures, Propositions 41 and 42, were also placed on the same ballot specifically designed to nullify Prop. 40 if they out-poll it. The tax would apply based on residency as of Jan. 1, 2026, meaning billionaires who left the state afterward would still owe it , and per the same report, likely voters narrowly support Proposition 40 — but slim majorities also support two billionaire-backed countermeasures that would nullify the big wealth tax (calmatters.org). - [2026-09-24] Campaign finance: Backers of the billionaire tax — primarily SEIU-UHW — have raised about $31 million to pass the measure, mostly from union coffers, and the California Democratic Party also supports the measure , while opponents led by Google co-founder Sergey Brin's group "Building a Better California" has raised over $187 million combined across the No-on-40 and Yes-on-41/42 campaigns (calmatters.org). - [2026-09-21] A Public Policy Institute of California (PPIC) poll found 52% of likely voters would vote yes on Prop. 40 (46% no), while 51% support Prop. 41 and 54% support Prop. 42 — the two measures that could nullify it. A new PPIC poll found 52% of likely voters would vote yes on Proposition 40, compared with 46% who would vote no, but the same poll found 51% support Proposition 41 and 54% support Proposition 42, two measures that could potentially nullify Proposition 40 if they pass and receive more votes. - [2026-09-30] An NBCUniversal Local/Telemundo poll showed Prop. 40 leading 48%-38% (14% undecided). 48% said they would vote "yes" on the proposal, while 38% said they would vote "no," with 14% undecided; the 10-point lead for "yes" is outside the poll's margin of error. - [2026-08-dated/~2026-08-18 per Hill] A UC Berkeley Institute of Governmental Studies poll (released ~Aug 2026) found closer numbers: 48 percent of California voters supported Proposition 40, while 41 percent opposed it, and 11 percent were undecided. - [2026-10-09] Sen. Bernie Sanders rallied in Los Angeles in support of Prop. 40 just weeks before the election, framing it as a national test case. "They believe... that they have a God-given right to rule. They have all the wealth; they got all the power... Well, I think on Nov. 3 they're going to learn a very powerful lesson," Sanders told an L.A. crowd. - [2026-10-05 to 2026-11-03] Per the official SOS voter guide, county election officials began mailing ballots on/before October 5, 2026, voter registration closed October 19, 2026, and Election Day is November 3, 2026 with polls open 7am–8pm (https://voterguide.sos.ca.gov/propositions/40/index.htm). - [2026-10-11] Both major gubernatorial candidates (Democrat Xavier Becerra and Republican Steve Hilton) publicly oppose Prop. 40, per LAist's voter guide: both oppose it, with Becerra calling it "sketchy policy" and Hilton saying it will hurt the state's economy. - [2026-10-09] A crypto-prediction-market news aggregator reported the relevant prediction market pricing Prop. 40's passage probability in the high-20s% as of early October, reflecting market skepticism about the measure overcoming the counter-initiative structure (not used as this question's own price, cited only as third-party commentary). BOTTOM LINE: Prop. 40 has cleared every procedural hurdle (certified for the ballot since June 17, 2026, text finalized in the official SOS voter guide) and leads narrowly-to-solidly in multiple fall 2026 polls (48-52% yes vs. 38-46% no), but it faces unprecedented structural risk from two billionaire-funded nullifying counter-measures (Props 41/42) that also poll with majority support, plus opposition from Gov. Newsom and both gubernatorial candidates — meaning even a Prop 40 majority "yes" could still fail to "pass" if 41 or 42 wins more votes. NOT FOUND: No evidence found of any court ruling removing Prop. 40 (or 41/42) from the ballot before the election; no final/last-week-of-October poll numbers (most recent found is NBC's Sept. 30 poll and Sanders' Oct. 9 rally); no official state projection of final turnout or early-vote returns as of Oct. 11, 2026.

- [2026-10-11] California's Proposition 40 (billionaire tax) has already cleared qualification: SEIU-UHW submitted signatures and on June 17, the California secretary of state announced that the wealth tax had qualified for the ballot with 980,438 valid signatures , and negotiations stalled before the June 25 withdrawal deadline, and the initiative was certified for the November ballot , meaning the "certification by June 25, 2026" condition for a "No" resolution is already moot (it qualified). - [2023-11-07] Reference class for "wealth tax" ballot measures nationally is 0-for-1 so far in the opposite direction: Texas Proposition 3 added language to the Texas Constitution to prohibit the state legislature from imposing a tax based on the wealth or net worth of an individual; as of 2023, no state had adopted a wealth tax , underscoring that no US state has ever enacted a wealth tax via ballot or legislature, so Prop 40 would be a first. - [2025-01-22] Legislative wealth-tax attempts in California itself have failed repeatedly: even though California faced a $68 billion budget deficit, A.B. 259 did not pass in the Legislature , and even in a state where government has Democratic leadership and majority legislative houses, wealth tax proposals need to be carefully crafted or they will not pass — showing the "wealth tax" concept specifically (distinct from income surtaxes) has a poor track record even getting through CA's own legislature. - [2004-11-02] The closer reference class — California "tax the rich" income-based ballot measures — has a strong passage history: Proposition 63 passed, placing a 1 percent tax on adjusted gross income over $1 million, affecting about 30,000 taxpayers . - [2012-11-06] Proposition 30, raising income taxes on top earners, was approved by California voters by a margin of 55 to 45% , and Proposition 55 in 2016 extended those increases and passed with 63.27% of the vote — showing CA voters have repeatedly approved "soak the rich" income tax surtaxes (3-for-3: 2004, 2012, 2016), though none were a one-time wealth/net-worth tax. - [2026-09-24] Unlike past "tax the rich" measures, Prop 40 faces direct, well-funded countermeasures on the same ballot: Propositions 41 and 42 are counter measures that would kill Prop 40 even if it passes; only one outcome can prevail — if Prop 40 captures more votes than both 41 and 42, the wealth tax takes effect; if either 41 or 42 outpolls Prop 40, the billionaire tax does not take effect . This dueling-initiative dynamic has no clean precedent in the "tax the rich" reference class above, making historical base rates less directly applicable. - [2026-09-29] Polling is currently close but favorable for Yes, within past patterns where support often erodes before election day: PPIC found 52% of likely voters favoring the measure with 46% opposed (a statistical tie considering margins of error) , while the poll found 51% of likely voters in support of Prop. 41 and 54% support for Prop. 42 . - [2026-09-30] A separate NBCUniversal/Telemundo poll showed a wider gap: 48% said they would vote "yes" on the proposal, while 38% said they would vote "no," and another 14% said they were undecided . - [2026-10-09] A Berkeley IGS/LA Times poll showed tighter numbers: a recent Berkeley IGS/L.A. Times poll on Prop 40 found that 45% support a billionaire tax, 42% do not and 13% are undecided — illustrating meaningful poll-to-poll variance (45-52% Yes range) a month out. - [2012-10, historical] Base-rate caution on late polling drift for CA tax measures: in 2012, Prop 30 support dropped sharply as election neared — 52% of likely voters opposed the measure and only 41% said they support Prop. 30 in the PPIC survey, conducted in mid-October... another 7% said they are still undecided — yet Prop 30 still ultimately passed 55-45%, showing late polling dips do not necessarily predict final outcomes. - [2026-10-06] Spending asymmetry is a further departure from the historical "tax the rich" reference class, where opposition typically was far less funded: (mostly) ultra-wealthy Californians have spent $217 million on just these three propositions , with backers raising far less ($31M) — a scale of counter-spending unseen in 2004/2012/2016 precedents. - [2026-10, historical parallel cited by proponents] Proponents argue fears of wealth flight are overstated based on 2012 experience: opponents feared millionaires would flee the state, but according to a 2018 study, California only lost a fraction of one percent of millionaires the year after Proposition 30 passed, and the proposition also raised $120 billion for local schools — though no prior CA measure has had the retroactive, mobility-incentivizing structure of Prop 40. BOTTOM LINE: California's historical reference class for "tax the wealthy" ballot measures (2004 Prop 63, 2012 Prop 30, 2016 Prop 55) is undefeated — three-for-three passage — but no U.S. state has ever enacted a true wealth/net-worth tax, legislative attempts in California itself have repeatedly failed, and Prop 40 uniquely faces two billionaire-funded nullifying countermeasures (Props 41/42) on the same ballot with a massive ($187M+) funding disadvantage, making this reference class a weak guide; current polls show Yes narrowly ahead (45-52%) but the outcome hinges on relative vote share against 41/42, not just a simple majority. NOT FOUND: No comprehensive scholarly dataset was found quantifying a "base rate" specifically for one-time billionaire/wealth-tax ballot measures (since Prop 40 is the first of its kind nationally); no systematic study found on how often a leading ballot measure facing dueling nullification countermeasures ultimately prevails in California.

YES means: Proposition 40 (the one-time 5% billionaire wealth tax) receives more "yes" votes than both nullifying countermeasures, Propositions 41 and 42, in the November 3, 2026 California general election, so the tax actually takes effect. - [2026-09-21] The most comprehensive, methodologically strong poll (PPIC, 1,100+ likely voters) found a new Public Policy Institute of California poll found 52% of likely voters would vote yes on Proposition 40, compared with 46% who would vote no , a majority that, if it holds, clears the basic bar for passage. - [2026-09-30] A separate, more recent poll showed an even wider margin: 41, which the poll found was supported by 51% of likely voters... 42 would prohibit new state personal property taxes, including those on retirement accounts and assets. It had support from 54% of likely voters in the PPIC poll — but Prop 40 itself led NBC/Telemundo's poll 48%-38%, a 10-point spread outside the margin of error, suggesting underlying support may be more robust than the closer PPIC/Berkeley numbers imply. - [2026-10-05] Reporting from the "US vs Billionaires" summit confirms the pro-40 coalition is actively running a "Yes-No-No" voter-education campaign to prevent voters from inadvertently undermining the tax by also voting yes on 41/42, with messaging efforts from musicians, canvassers and retired-millionaire activists like Frank Jernigan explicitly working to correct this risk (missionlocal.org). - [2026-08-04] The measure has unusually broad institutional labor backing beyond its sponsor: California's largest labor federation — 1,300 unions, 2.3 million members — just endorsed Prop 40... The federation represents more than 1,300 affiliated unions across the state with more than 2.3 million union members. , giving Yes-on-40 a large mobilization and GOTV infrastructure independent of SEIU-UHW's own spending. - [2026-09-24] Yes-on-40's own fundraising, while dwarfed by opponents, is not negligible: Backers of the billionaire tax — primarily SEIU-UHW — have raised about $31 million to pass the measure, mostly from union coffers. The California Democratic Party also supports the measure. , meaning Prop 40 retains official state-party-level institutional backing despite Gov. Newsom's personal opposition. - [2026-10-07] Reporting underscores that Props 41/42 are themselves complex, unfamiliar measures that could also underperform on Election Day: polling shows all three measures "could pass with slim majorities," and if confusion or late "no on everything" drift affects 41/42 as much as or more than 40, the tax could still prevail by the plurality-style tiebreak (contrarian/pressdemocrat reporting on PPIC poll). - [2026-10-11] Editorial boards are actively campaigning to protect the "Yes" outcome: the Press Democrat explicitly told readers Californians who vote yes on Prop. 40 should vote no on Props. 41 and 42. If they do not, they vote against themselves. , indicating opinion-leader efforts are now focused on preventing voter confusion from costing Prop 40 the win — a late-stage corrective absent in typical single-measure campaigns. - [2026-10-09] Sen. Bernie Sanders' Los Angeles rally, timed four weeks before the election and framed nationally ("the whole country is watching"), "The whole country is watching what you are doing here, and why it is so imperative that we win this struggle," Sanders told the crowd. — high-profile surrogate campaigning in the campaign's final weeks is historically associated with late voter mobilization on progressive tax measures (e.g., 2012's Prop 30 recovery from an October polling dip to a 55-45% win, per colleagues' prior research). - [2026-10-11] The procedural path is fully cleared: Prop 40 is certified and live on the ballot with no reported legal removal, and the only remaining contingency for a "No" resolution is relative vote share against 41/42 — a single, well-defined, poll-tracked threshold rather than a procedural or judicial uncertainty. - [2026-10-05] Voter guide and advocacy materials (SOS arguments/rebuttals page) show the Yes campaign has a clear, aggressive closing message rebutting opponents directly: Billionaires like Brin have bought and paid for some corrupt politicians and organizational leaders to also oppose Prop. 40—but actual teachers, Planned Parenthood workers, nurses, and union members support it. BOTTOM LINE: The strongest Yes case rests on Prop 40 consistently polling above 45-52% support (with one poll, NBC/Telemundo, showing a clear double-digit lead), backed by a large union mobilization infrastructure (2.3M-member CA Labor Federation) and national progressive star power (Sanders), combined with a concerted, editorially-endorsed "Yes-No-No" voter education push that — if even partially successful — could let Prop 40 outpoll both Props 41 and 42 and take effect despite being outspent roughly 6-to-1. NOT FOUND: No poll released after October 9, 2026 showing relative margins between Prop 40 and Props 41/42 on the same survey closer to Election Day; no early/mail ballot return data breaking down "yes" share on Prop 40 specifically; no quantified modeling of how many "Yes-40/Yes-41or42" dual voters exist that would determine whether the "Yes-No-No" messaging campaign is working.

YES means: a qualifying one-time billionaire wealth-tax proposition (i.e., Proposition 40) actually passes — wins more votes than "no" AND outpolls both nullifying countermeasures (Propositions 41 and 42) — in the November 3, 2026 California election. - [2026-10-11] The official Legislative Analyst's Office ballot analysis confirms the structural kill-switch in writing: if Proposition 41 or 42 receive more "yes" votes than Proposition 40, then Proposition 40 could be stopped from becoming law even if it gets yes votes from a majority of voters, because the courts could find that Proposition 41 or 42 conflict with Proposition 40. This is not activist spin but the state's own nonpartisan analyst's framing, meaning even a Prop 40 majority is not sufficient for a YES resolution. (https://lao.ca.gov/BallotAnalysis/Proposition?number=40&year=2026) - [2026-09-26] A UC Berkeley IGS poll (reported Sept 28) found support for Prop 40 had fallen to 45%, down from 52% in IGS' March poll , with IGS co-director Mora warning: "With less than 50 percent support this close to the election, ballot measures for new taxes tend not to pass, as undecided voters likely break toward 'no'" — a documented California political-science rule of thumb that favors NO. (https://www.cpapracticeadvisor.com/2026/09/28/billionaires-outspend-prop-40-backers-5-to-1-as-california-wealth-tax-support-slips-in-poll/190618/) - [2026-09-30] A separate Politico/UC Berkeley Citrin Center poll corroborates the erosion, finding the Yes lead had collapsed from a 19-point lead in March to just two points, 45%-43%, with pollster Jack Citrin noting the pattern that early leads shrink once opposition campaigns mobilize. (https://ls.berkeley.edu/news/why-californias-billionaire-tax-toss-midterms-near) - [2026-09-30] The same Berkeley/Citrin poll found deep voter skepticism about the tax's "one-time" framing — a Politico California and UC Berkeley's Citrin Center for Public Opinion Research poll released last week found that the lead has dropped to two percentage points, with 45% supporting and 43% opposing the tax — and separately that 60-70% of respondents doubted the "one-time" claim, a messaging vulnerability opponents are exploiting in the campaign's final weeks. (https://ls.berkeley.edu/news/why-californias-billionaire-tax-toss-midterms-near) - [2026-10-09] Gov. Gavin Newsom formally endorsed Proposition 42 — the specific countermeasure designed to nullify Prop 40 — becoming the sitting Democratic governor actively campaigning against the wealth tax his own party's base supports, per CalMatters: on Friday he endorsed Proposition 42, a ballot measure that would cancel out Proposition 40... 42 would prohibit retroactive taxes like the one-time 5% tax on assets that would apply to any billionaire who lived in California on Jan. 1, 2026 if Prop. 40 passes. (https://calmatters.org/politics/2026/10/newsom-tax-propositions-november-election/) - [2026-09-28] Campaign finance filings show critics have now outspent backers more than 5-to-1, with critics of a proposed wealth tax on California billionaires having outspent Proposition 40 backers more than 5-to-1, according to campaign filings, as its backers have spent roughly $36 million boosting the measure amid a barrage of ads painting the measure as a dangerous experiment , with Brin's committee alone having drawn support from at least 18 other billionaires with its primary funder, Sergey Brin, having sunk $102 million into the committee so far — and by Oct 9 the figure was reported even higher at over $138 million from Brin alone. (https://www.cpapracticeadvisor.com/2026/09/28/billionaires-outspend-prop-40-backers-5-to-1-as-california-wealth-tax-support-slips-in-poll/190618/, https://www.edhat.com/california/news/california-prop-40-billionaire-tax-explained-november-ballot/) - [2026-09-16] PPIC's own mid-September poll shows the problem is not just Prop 40's standalone support but that about 51% of likely voters also support Proposition 41, which would require a state auditor to review proposed special taxes before being placed on the ballot, and about 54% support Proposition 42, which would prohibit new state personal property taxes, with both measures, backed largely by Google co-founder and billionaire Sergey Brin, effectively invalidating the billionaire tax if passed — meaning Prop 40 must not just win a majority, it must outpoll two rival measures that currently poll even higher than it does. (https://edsource.org/updates/poll-california-voters-support-billionaire-wealth-tax-and-its-countermeasures) - [2026-10-05] Even sympathetic reporting frames the contest as toxic for passage: The American Prospect noted that despite 65% of California Democrats backing Prop 40, Gavin Newsom's opposition has trickled down to nearly every elected official , denying the measure institutional Democratic firepower it would need to overcome a nine-figure opposition campaign in the final stretch. (https://prospect.org/2026/10/06/california-democrats-but-not-their-elected-representatives-back-the-billionaire-wealth-tax/) - [2026-09-13 approx.] Wealth flight is already materializing ahead of the vote, undercutting proponents' practical case and signaling elite mobilization against the measure: the eligibility cut-off outlined in the initiative was January 1, 2026, meaning that if the initiative is passed by voters, billionaires who continued to hold residence in the state after that date will be subject to the 5% tax; seven of the state's estimated 214 billionaires were reported to have left California before or around the deadline, including PayPal co-founder Peter Thiel and former Uber CEO Travis Kalanick , with Brin himself reportedly also relocating assets. (https://en.wikipedia.org/wiki/2026_California_Proposition_40, https://www.edhat.com/california/news/california-prop-40-billionaire-tax-explained-november-ballot/) - [2026-09-24] CalMatters' structural explainer underscores that this dueling-initiative design is deliberate and unprecedented: the billionaire-backed group Building a Better California designed two countermeasures to undermine the wealth tax and create multiple ways to defeat it , giving opponents two independent paths to a NO resolution (defeat Prop 40 outright, or let 41/42 outpoll it) versus proponents' single narrow path to YES. (https://calmatters.org/health/2026/09/california-wealth-tax-prop-40-41-42/) - [2026-09-28/10-09] Multiple post-certification polls now cluster below the 50% "safe" threshold for a tax ballot measure this close to an election: NBC found 45% support, 42% opposed in the latest edhat/Berkeley reporting, and the ABC7 report on Oct 9 found 45% support a billionaire tax, 42% do not and 13% are undecided — a far tighter margin than the September NBC poll cited by colleagues, consistent with a late-campaign erosion trend rather than stabilization. (https://abc7.com/post/ca-prop-40-sen-bernie-sanders-rallies-la-support-proposed-billionaire-tax-country-is-watching/19912286/) BOTTOM LINE: Even setting aside Prop 40's own shrinking and sub-50% lead in the newest Berkeley/Citrin and IGS polls (45% vs. 42-43%, down from a 19-point March lead), the question's resolution criteria require Prop 40 to outpoll both Props 41 and 42 — a double hurdle the LAO's own analysis confirms could let a Prop 40 "win" still resolve NO — and with opponents (including Newsom, both gubernatorial candidates, and a 5:1-to-$200M+ funding edge) targeting exactly that mechanism, the structural and polling evidence together favor a NO resolution. NOT FOUND: No final (late-October/election-week) poll breaking out Prop 40 vs. 41 vs. 42 head-to-head vote share simultaneously; no court ruling yet on how election officials or courts will mechanically implement the "more yes votes" nullification test if margins are close; no independent legal opinion from the California Attorney General on litigation risk post-election.