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

- [2026-06-17] The Secretary of State reported that the billionaire tax initiative had at least 980,438 valid signatures, which qualified it. Ballotpedia reports the one-time 5% net-worth tax applies to billionaires residing in California on Jan 1, 2026. https://news.ballotpedia.org/2026/06/18/california-billionaires-tax-qualifies-for-the-november-ballot-competing-measures-pending-signature-verification/ - [2026-06-25] The measure was certified for the Nov 3, 2026 ballot as Proposition 40. This meets the market's certification condition. There was no deal to withdraw it, and Newsom had reportedly tried to negotiate one. Source for certification: https://defirate.com/prediction-markets/california-wealth-tax/ (secondary). Background on the failed deal: https://calmatters.org/politics/2026/06/california-unions-billionaire-tax-ballot/ - [2026-10-18] CalMatters' voter guide says Prop 40 would impose a one-time 5% tax on about 200 Californians. It states that "If propositions 41 or 42 earn more votes than Proposition 40, this measure would be nullified." https://calmatters.org/california-voter-guide-2026/proposition-40-billionaire-tax/ - [2026-10-18] Prop 41 (spending limits and audits) and Prop 42 (bans retroactive taxes and new taxes on personal property) are both Brin-backed counter-measures. Both qualified for the ballot. https://en.wikipedia.org/wiki/2026_California_Proposition_40 - [2026-10-09] Newsom endorsed Prop 42 and opposes Prop 40. He had no position on Prop 41 as of Oct 9 (updated Oct 13). SEIU-UHW attacked the endorsement. https://calmatters.org/politics/2026/10/newsom-tax-propositions-november-election/ - [2026-10-18] Endorsements. For Prop 40: the California Democratic Party, California Labor Federation, AFSCME, Teamsters and Bernie Sanders. Against: California Business Roundtable, California Medical Association, California Teachers Association, Planned Parenthood, the LA Times and others. https://calmatters.org/california-voter-guide-2026/proposition-40-billionaire-tax/ - [2026-09-30] An NBC/Telemundo poll found Yes 48%, No 38%, and 14% undecided. NBC's headline says the measure falls short of majority support. https://www.nbcnews.com/politics/2026-election/california-poll-voters-back-billionaire-tax-proposal-falls-short-major-rcna600354 - [2026-09-25] A Berkeley IGS poll found Prop 40 support slipping from 48% in mid-August to 43% a month later. https://www.sanjoseinside.com/politics/poll-reports-voter-support-for-ca-billionaire-tax-is-slipping/ - [2026-10-16] Forbes reports opposition spending is above $1M per day and that polls show passage getting less likely. The page was not fetchable, so this rests on the snippet. https://forbes.com/sites/maryroeloffs/2026/10/16/spending-against-californias-billionaire-tax-tops-1-million-per-day-and-its-working - [2026-10-17] TaxProf roundup: polls show a "slim" edge for Prop 40 among likely voters with many undecided. Props 41 and 42 also poll with more support than opposition. https://taxprofblog.aals.org/2026/10/17/roundup-changing-coalitions-and-californias-billionaire-tax/ - [2026-10-17] Money. Wikipedia reports Brin has spent over $100M against Prop 40, and Thiel has put about $100M into a Business Roundtable-led committee. Prop 42 has received almost $98M from an anti-40 PAC. https://en.wikipedia.org/wiki/2026_California_Proposition_40 - [2026-10-13] Other markets as of Oct 13: Yahoo Finance says Polymarket and Kalshi were both bearish on passage. On about Oct 1, Kalshi was 34% and Polymarket 32% (via DeFiRate, secondary). https://finance.yahoo.com/economy/policy/articles/californias-billionaire-tax-might-now-150000601.html - [2026-11-03] Election day. Ballots were due to go out to voters in early October. Results are certified later, and the resolution source is the California SOS. https://www.sanjoseinside.com/politics/poll-reports-voter-support-for-ca-billionaire-tax-is-slipping/ BOTTOM LINE: Prop 40 is on the ballot, so the certification condition is met. Passage now depends on a simple majority. Polls run from a slim Yes lead to a falling Yes share, with heavy opposition spending and Props 41 and 42 as nullifiers if they get more votes. Even if Prop 40 passes, it could be nullified. The market's wording ("passes") does not say how that case resolves. NOT FOUND: The SOS official certified list page. A fetched copy of the Forbes article. Any Prop 41 or 42 polling margins. Any court challenge to remove or amend Prop 40. Any poll from Oct 10–18.

- [2026-06-17] Prop 40 qualified for the ballot. The Secretary of State verified 980,438 valid signatures against 874,641 required. SEIU-UHW's last-minute talks with Newsom to pull it before the June 25 deadline failed, even after the union reportedly offered to cut the rate from 5% to 2%. So the measure is on the ballot and the "not certified" path to No is closed. https://en.wikipedia.org/wiki/2026_California_billionaire_tax_initiative ; https://www.hodgsonruss.com/california-state-and-local-tax/the-fight-is-on-the-california-billionaire-tax-is-officially-on-the-ballot - [2026-09-24] Prop 40 is a one-time 5% tax on residents with net worth over $1B as of 1 Jan 2026. Two billionaire-funded counter-measures, Props 41 and 42, are also on the ballot. If either gets more votes than Prop 40, the wealth tax does not take effect, even if Prop 40 wins a majority. Prop 42 bans retroactive taxes and new taxes on personal property. Prop 41 requires new taxes to comply with the state spending limit and be audited. Under this structure, passing needs both a majority yes and more yes votes than 41 and 42. PPIC showed slim majorities for all three measures. https://calmatters.org/health/2026/09/california-wealth-tax-prop-40-41-42/ - [2026-10-12] Newsom endorsed Prop 42, the one funded by Sergey Brin, and still opposes Prop 40. He argues for a national billionaire tax instead. Both gubernatorial candidates oppose Prop 40. https://thehill.com/homenews/campaign/6144461-newsom-endorses-prop42-billionaire-tax/amp/ ; https://fox40.com/news/political-connection/2026-election/prop-40-breakdown/ - [2026-09-30] NBCUniversal Local/Telemundo poll: 48% yes, 38% no, 14% undecided, margin of error ±4. This is a plurality, not a majority. https://www.nbcnews.com/politics/2026-election/california-poll-voters-back-billionaire-tax-proposal-falls-short-major-rcna600354 - [2026-09] Berkeley Citrin Center/Politico poll of registered voters: 45% yes, 43% no, 12% undecided. https://thehill.com/homenews/campaign/6144461-newsom-endorses-prop42-billionaire-tax/amp/ - [2026-08-14] Berkeley IGS poll of likely voters: 48% yes, 41% no. Support splits along partisan lines. Awareness is unusually high at 72%. IGS called it a closely fought contest. https://news.berkeley.edu/2026/08/17/california-prop-40-the-billionaire-tax-holds-lead-in-new-uc-berkeley-igs-poll/ - [2026-10-17] Opposition spending has passed $1M per day. Polls show a slim yes edge with many undecided. Props 41 and 42 also poll above 50% in some surveys, and voters say there are too many propositions. https://taxprofblog.aals.org/2026/10/17/roundup-changing-coalitions-and-californias-billionaire-tax/ - [2026-09] Funding: the yes side has raised about $31–32M, almost all from SEIU-UHW. One billionaire had spent $82M against the measure by June. https://calmatters.org/health/2026/09/california-wealth-tax-prop-40-41-42/ ; https://calmatters.org/politics/2026/06/california-unions-billionaire-tax-ballot/ - [Historical] California voters passed tax-the-rich income measures in 2012 (Prop 30, 55.4% yes) and 2016 (Prop 55, 63.3% yes). Those were income-tax measures that funded schools and had broad coalitions, including the governor's support in 2012. https://en.wikipedia.org/wiki/2012_California_Proposition_30 ; https://ballotpedia.org/California_Proposition_55,_Extension_of_the_Proposition_30_Income_Tax_Increase_(2016) . In 2016, the earlier Berkeley IGS poll had Prop 55 at 65.3% yes, close to its final 63.3%. https://news.berkeley.edu/2016/08/16/new-poll-californians-back-extending-taxes-on-wealthy-upping-cigarette-tax/ - [2023] Texas voters approved a ban on wealth taxes 68–32. No US state has ever enacted a wealth tax. https://news.ballotpedia.org/2026/04/29/signatures-submitted-for-california-initiative-enacting-one-time-billionaire-tax-for-healthcare-and-education-funding/ - [Background, not fetched this session] My recollection is that the 2022 Prop 30, a tax on incomes above $2M for EVs, lost roughly 42–58 after Newsom opposed it. A search result confirms the fight over it but not the result. https://calmatters.org/explainers/california-ballot-measures-prop-30-key-numbers/ . Another general pattern from memory: ballot-measure "yes" support usually erodes toward election day, and heavy opposition spending tends to hurt. I did not verify either. - [2026-10-18] No prediction-market or expert probability estimates were reviewed here, per instructions. BOTTOM LINE: The measure is certified, so the outcome turns on the vote. Prop 40 faces a narrow, sub-majority yes plurality in polls, with many undecided and heavy opposition spending. It also needs more yes votes than both counter-measures, 41 and 42, which polled as well or better in some surveys. Historical base rates for ballot measures that lead only narrowly in polls with a well-funded, high-profile "no" campaign lean toward failure, though California's earlier tax-the-rich measures passed. NOT FOUND: Final official ballot-order confirmation from the Secretary of State site; polls from the last 10 days; the PPIC September crosstabs directly; any non-Polymarket betting odds or named expert forecasts; verified 2022 Prop 30 result.

YES means: California voters approve Prop 40, the one-time 5% tax on billionaires, in the Nov 3, 2026 election. A simple majority "yes" is required. The measure must also not be nullified by Props 41 or 42, which is the likely reading of "passes". - [2026-09-04 to 09-10, released 09-23] PPIC likely-voter poll (n=1,103, ±3.8): Prop 40 at 52% yes and 46% no, which is the only majority-yes reading in the polls reviewed. By party, 72% of Democrats, 46% of independents and 21% of Republicans back it. Only 16% of likely voters named it their top-interest measure, and 20% of Democrats did. https://www.ppic.org/publication/ppic-statewide-survey-californians-and-their-government-september-2026/ - [2026-09-10] The same PPIC poll shows a Democratic-leaning electorate. Becerra leads Hilton 60–38, and Democrats lead House races 62–36. Democrats are far more likely than Republicans to say voting matters more this year (69% vs 50%). Prop 40 is a Democratic-base measure, so a Democratic-heavy turnout is the main structural tailwind. Trump's approval among likely voters is 27%. https://www.ppic.org/publication/ppic-statewide-survey-californians-and-their-government-september-2026/ - [2026-09-30] The NBC/Telemundo poll gives Yes a 10-point lead (48–38), outside the margin of error. Hispanic likely voters split 50–40. Democrats split 67–19. 59% of respondents were not concerned about billionaires fleeing. The undecided 14% could break either way. https://www.nbcnews.com/politics/politics-news/california-showdown-national-implications-politics-desk-rcna600773 - [2026-10-07 to 10-13] Every poll reviewed shows Yes ahead, though not always at 50%. The newest Berkeley IGS number is 45–42 with 13% undecided (Latin Times, Oct 7). Politico/Berkeley Citrin gives 45–43 and a separate Politico poll gives 46–40 (Yahoo, Oct 13). Prediction markets were at about 25–26% on Oct 13, which is bearish relative to the polls. Yes leads in all of these, with undecided voters of 12–14%. https://finance.yahoo.com/economy/policy/articles/californias-billionaire-tax-might-now-150000601.html - [2026-10-17] Prop 40's sponsors can argue that Props 41 and 42 are hidden poison pills. PPIC's director said voters likely don't realize they are direct countermeasures because little has been said about them. SEIU-UHW is campaigning against 41 as a trick. If voters learn the purpose, "yes on 40, no on 41/42" is plausible, and that is the path to Prop 40 outpolling both. https://laist.com/brief/news/politics/prop-40-the-billionaire-tax-conflicting-tax-measures - [2026-10-18] The countermeasures' polling edge may be soft. 41 stood at 51–44 and 42 at 54% in PPIC, but both were measured after reading only the ballot label, before heavy ad spending and before the "nullifies Prop 40" framing was communicated. The 41/42 electorate also leans Republican. 75% of Republicans back 41, and only about 40% of Democrats do. A Democratic-heavy turnout therefore favors Prop 40 over 41 and 42 in raw yes votes. https://www.ppic.org/publication/ppic-statewide-survey-californians-and-their-government-september-2026/ - [2026-11-03] The LAO's official analysis says a Prop 40 majority is not automatically fatal. It says 41 or 42 outpolling Prop 40 "could" stop the tax because courts "could find" a conflict. https://lao.ca.gov/BallotAnalysis/Proposition?number=40&year=2026 - [2026-10-17] Prop 40 also has its own competing-measure clause. If it gets more votes, it voids 41 and 42 (Newsweek, Oct 14). The Budget Center says that if 40 and 41 both pass and 40 wins more votes, the tax could be collected. https://www.newsweek.com/california-billionaire-tax-could-lose-even-if-voters-approve-it-12560468 - [2026-10-18] Prop 40 is a ballot-box test of a wider mood. An August Data for Progress survey found 72% of Democrats and 53% of all likely voters believe billionaires got their wealth by exploiting workers or consumers. In the 2026 NBC national poll, taxing billionaires was the most popular of 15 candidate attributes. Sanders held rallies in San Francisco (Oct 3) and Los Angeles. https://www.sfchronicle.com/politics/joegarofoli/article/pelosi-harris-prop-40-california-22476930.php - [2026-10-18] Counter-signals: the SF Chronicle reports opponents have raised about $259M, roughly $8 for each $1 raised by supporters. Harris and Pelosi have stayed neutral. Newsom, both gubernatorial finalists and the LA Times oppose it. These are real obstacles but not decisive. The 2012 and 2016 tax-the-rich initiatives passed despite opposition. https://www.sfchronicle.com/politics/joegarofoli/article/pelosi-harris-prop-40-california-22476930.php - [2026-10-18] Single most likely YES path: 1. A Democratic-heavy midterm electorate, with Democrats at about 70% yes. 2. Independents split roughly evenly. 3. Most undecided voters, who are mainly Democratic and Hispanic, break Yes. 4. Ads against 41 and 42 move them below Prop 40's yes count. If they stay above it, the outcome probably depends on court litigation. 5. Prop 40 clears 50%. BOTTOM LINE: The case for Yes rests on every public poll showing Prop 40 ahead, with Yes ahead among the Democratic-heavy electorate and large undecided shares. The measure must also take more yes votes than both 41 and 42. Those two currently poll equal to or above it, so I read this as a real obstacle, not a formality. NOT FOUND: Any poll after Oct 10. Prop 41 and 42 results from any poll other than PPIC. Early-ballot return data by party. The text of the Prop 40 competing-measure clause on the SOS site. The Forbes Oct 16 article, which I did not fetch.

YES means: Prop 40 (the one-time 5% billionaire wealth tax) is approved by California voters at the Nov 3, 2026 election and is not nullified or removed under the resolution criteria. - [2026-10-17] A "Yes" on Prop 40 is not enough. Under Art. II §10(b), if conflicting measures both pass, the one with the most yes votes prevails. Prop 40 therefore needs a majority and more yes votes than both 41 and 42. In the Sept 4–10 PPIC poll (before the Oct 12 Newsom endorsement, i.e. older than the Oct 9 endorsement report), Prop 42 had 54%, Prop 40 had 52% and Prop 41 had 51%. In that poll the strongest nullifier led the wealth tax by 2 points. https://www.abc7news.com/post/prop-40-poll-finds-california-voters-back-billionaire-tax-measure-could-block/19844566/ ; https://calmatters.org/politics/2026/10/tax-propositions-ballot-measures/ - [2026-10-17] The SF Chronicle's Oct 17 explainer says the conventional outcome is that the higher-vote measure wins and the loser is invalidated. The 1990 California Supreme Court ruling (Prop 68 v. 73) rejected piecemeal enforcement of competing initiatives. Litigation is likely whichever side wins. The criteria say "passes" and do not say how a nullified win resolves. The most literal NO reading is that a nullified Prop 40 has not "passed" in effect. This is a resolution-ambiguity risk, not a certainty. https://www.sfchronicle.com/election/article/prop-40-41-42-california-22476000.php - [2026-10-17] Legal drafting favours the countermeasures. Props 41 and 42 declare "all provisions" of a rival measure void. Prop 40 voids only "conflicting provisions". Prop 42's spokesman says Prop 42 would still apply to future wealth taxes even if Prop 40 got more votes. Either side can litigate. Proposition 40's own text (SOS PDF) confirms the vote-count conflict clause. https://vig.cdn.sos.ca.gov/2026/general/pdf/prop41-text-proposed-laws.pdf - [2026-10-05] CalMatters: since 2000 only about one-third of tax propositions have passed, against 57% of non-tax measures. PPIC's Baldassare says uncertain voters default to "no". Support for propositions tends to decline toward election day. He also warns of "tax fatigue" with five tax measures on the ballot, the most since 1990. That is the status-quo bias working against a first-in-the-nation tax. https://calmatters.org/politics/2026/10/tax-propositions-ballot-measures/ - [2026-10-05] PPIC (Feb 2026): 55% of Californians preferred lower taxes and fewer services. This is a baseline headwind for any new tax. https://calmatters.org/politics/2026/10/tax-propositions-ballot-measures/ - [2026-10-17] Historical competing-measure results lean toward "none win". The Chronicle cites the 1988 insurance wars, where only one of five measures (Prop 103) passed. Election-law attorney Woocher says that when measures are presented as alternatives, voters usually back one and not the other, or confused voters vote against both. The Chronicle also cites a 35% approval rate for initiatives since 1912 (141 approved, 256 rejected). https://www.sfchronicle.com/election/article/prop-40-41-42-california-22476000.php - [2026-10-07] The most recent Berkeley IGS poll, per Latin Times, had Prop 40 at 45% yes, 42% no and 13% undecided. That is below 50%, and the Aug 14 IGS figure was 48–41, so it is down 3 points on yes. Yahoo Finance (Oct 13) cites a September Politico poll at 46–40, against 50–28 in Feb/March. The yes share has eroded in every series. https://www.latintimes.com/40-billion-100-billion-numbers-behind-californias-prop-40-fight-599912 ; https://finance.yahoo.com/economy/policy/articles/californias-billionaire-tax-might-now-150000601.html - [2026-10-14] KQED: the Prop 40 opposition has put about $100M behind Prop 42 against about $80M into No on 40. This suggests the opposition regards Prop 42 as its main kill switch. Prop 42 also draws odd allies: construction trade unions, firefighters and police worried about retirement accounts, per UC Irvine's Gould on Oct 16. Prop 40's labor base is therefore split. https://www.kqed.org/forum/2010101915682/californias-billionaire-tax-and-the-efforts-to-nullify-it ; https://socialecology.uci.edu/news/voters-face-ballot-full-traps-tricks-and-trillion-dollar-stakes - [2026-10-16] UC Irvine's Gould says 41 is "currently polling worse" than 40, but the cleaner reading of 41 is that a yes on it is effectively a no on 40. The confusion was described as intentional. https://socialecology.uci.edu/news/voters-face-ballot-full-traps-tricks-and-trillion-dollar-stakes - [2026-10-13] Yahoo Finance reports that Kalshi was at 26% and Polymarket about 25% on Oct 13. That is down from about 32–34% around Oct 1 in the earlier report. The other markets are drifting toward No. https://finance.yahoo.com/economy/policy/articles/californias-billionaire-tax-might-now-150000601.html - [2026-10-12] Fox40: the SEIU-UHW side had spent about $22M against Building a Better California's $88.5M. The anti side is outspending the pro side roughly 4 to 1 by FPPC data. The Politico/Berkeley figure of 45–43 among likely voters had 12% undecided. Newsom, the incoming gubernatorial candidates and the CTA all oppose. https://fox40.com/news/political-connection/2026-election/prop-40-breakdown/ - [2026-10-17] The 2022 CA Prop 30 comparison and the 2012/2016 passes in the earlier reports were income-tax measures with a governor's backing or an ongoing program. Prop 40 has the sitting governor on the other side and uses a novel tax base, so the earlier passes are weaker precedents. BOTTOM LINE: The No path needs only one of three things: Prop 40 falling short of 50%, Prop 41 or 42 outpolling it, or a nullification dispute being read against "passes". With the latest polls at 43–48% yes, a 54% result for Prop 42 in PPIC, heavy opposition spending and a one-third tax-measure pass rate, status quo inertia favours No. NOT FOUND: Any poll after Oct 10 on Prop 40, 41 or 42. A direct fetch of the SOS certified-list page. Any court action to remove or amend Prop 40. Polling on how many voters realise 41 and 42 are countermeasures beyond PPIC's Baldassare's comment. The Forbes Oct 16 article text.