Fact-check: Prop 40
Checked 2026-10-28. Claims: 40 rows. Verified: 30 (several secondary). Corrected: 9 (incl. row 18, partly Pending). Unsupported: 1. Pending: 0. Links fixed: 0 (sources added: 4; Wikipedia line split in two).
| # | Claim (short) | Source checked | Status | Evidence / change |
|---|---|---|---|---|
| 1 | Frontmatter: sponsor SEIU-UHW | AP (abcnews.com) | Verified (secondary) | "Service Employees International Union Healthcare Workers West offered..." |
| 2 | Dozens of initiatives since 2012, lost every statewide vote | Wikipedia SEIU-UHW; Ballotpedia SEIU-UHW | Corrected | Wikipedia: "has filed dozens of ballot initiatives since 2012", "few if any" passed; neither says it lost every vote. Changed to "few if any have passed" |
| 3 | Dialysis Props 8/23/29 got 40/37/32% | Wikipedia SEIU-UHW | Verified (secondary) | "Rejected 60% to 40%", "63% to 37%", "68% to 32%" |
| 4 | Several dropped after hospital deals (2012, 2014) | Wikipedia SEIU-UHW (cited headlines); Ballotpedia | Verified (secondary) | Cited headlines: "SEIU drops initiatives as part of California hospital accord" (2012); "...Withdraws Ballot Initiatives" (2014) |
| 5 | June 2026 offer to drop for 2% deal | AP June 18, 2026 | Verified | "would abandon the 5% tax proposal if Newsom would join them in supporting a 2% levy" |
| 6 | No deal happened | AP | Verified (secondary) | No deal reported; Limón: budget "does not include the billionaire's tax"; measure is on ballot |
| 7 | 12 OECD wealth taxes in 1990; 3 now | Euronews | Corrected | Source: 12 in 1990, 4 in 2017 (OECD); 3 in 2025 per Tax Foundation. Added 2017 and attribution |
| 8 | 0.6-4.3% of tax revenue | Euronews | Verified | Spain 0.6%, Norway 1.5%, Switzerland 4.3% |
| 9 | OECD quote "often failed..." | Euronews | Verified | "net wealth taxes often failed to achieve their redistributive objectives" (OECD page not opened: budget) |
| 10 | "tens of billions", "very hard to predict" | LAO | Verified | "probably would collect tens of billions"; "very hard to predict" |
| 11 | Sponsor says ~$100B | Wikipedia billionaire tax; Fortune Mar 2026 | Verified (secondary) | SEIU-UHW "estimated that the tax would generate $100 billion"; Fortune: "projected $100 billion haul" |
| 12 | Six billionaires left, $26.8B | Fortune Mar 17, 2026; Wikipedia | Verified | Fortune: "Six of California's 214 billionaires" left, "$27 billion in potential revenue"; Wikipedia: "an estimated $26.775 billion"; Jan 1, 2026 cutoff |
| 13 | 90% health care is one-time vs ongoing Medicaid cut LAO | LAO | Unsupported | LAO doesn't mention Medicaid cuts. Changed to "one-time money, not an ongoing funding source" |
| 14 | Most money flows to sector whose workers sponsor represents | GV Wire (LA Times) | Corrected | GV Wire: spending "could indirectly benefit members" of SEIU-UHW. Softened to that |
| 15 | Table: 2012/2014 hospital initiatives withdrawn | Wikipedia SEIU-UHW | Verified (secondary) | See row 4 |
| 16 | Table: Prop 8 $19.3M vs $111M+ | Wikipedia; Ballotpedia | Verified (secondary) | Wikipedia table: $19.3 million spent; Ballotpedia: opponents raised $111.48 million (Ballotpedia shows SEIU-UHW $17.79M cash + $84,698 in-kind; minor discrepancy, Wikipedia figure kept) |
| 17 | Table: Prop 23 $8.9M; Prop 29 $8.0M | Wikipedia; Ballotpedia | Verified (secondary) | Wikipedia: $8.9 million; $8 million; Ballotpedia Prop 29: $7.97M |
| 18 | Table: Prop 40 union $29M+; Prop 44 $16.9M | SoS Prop 40 page | Corrected / Pending | SoS (through 10/22/2026): "Yes on 40 - Billionaire Tax Now ... sponsored by SEIU-UHW" $32,932,998. Cell changed to "$32.9M raised by its Yes committee through Oct 22 SoS". Pass 4: SoS Prop 44 page: "Yes on Prop 44, Sponsored by Service Employees International Union - United Healthcare Workers West" $16,930,133 through 10/22/2026. Verified; tag + Sources line added. Table's 2018 Prop 8 "40% yes" re-confirmed (Ballotpedia, certified SOV: 40.07%) |
| 19 | Dialysis measures as pressure to unionize | Wikipedia SEIU-UHW; Ballotpedia | Verified (secondary) | Wikipedia: commentators see them as "a negotiation tactic"; Ballotpedia: opponents "This is just leverage." CalMatters 2020 not opened |
| 20 | WA year 1 $786M, ~3,000 payers | KUOW | Verified | "$786 million netted in 2023"; "around 3,000 payments in each of the last two years". Changed "payers" to "payments", added tag |
| 21 | WA year 2 $1.5B budgeted, $433M partial | KUOW | Verified | "lawmakers counted $1.5 billion..."; "$433 million as of May 15, 2024" |
| 22 | WA "revenue swings with markets" | KUOW | Corrected | Source: "expected to fluctuate year to year based on changes in the economy" |
| 23 | 5% tax on net worth above $1B | LAO | Corrected | LAO: tax "equal to 5 percent of their net worth" for people worth over $1B (not only the part above $1B) |
| 24 | Jan 1, 2026 residency; 5-year payment | LAO | Verified | "residents of California on January 1, 2026"; "spread the payments over five years but would have to pay more" |
| 25 | Real estate, retirement mostly excluded | LAO | Verified | "Real estate, pensions, and retirement accounts generally would be excluded"; added pensions |
| 26 | 90/10 split; exempt from spending limit and Prop 98 | LAO | Verified | "Ninety percent ... health care"; constitutional spending/school rules "would not apply" |
| 27 | Voided if Prop 41 or 42 gets more votes | CalMatters guide | Verified | "this measure would be nullified" |
| 28 | Yes $33.4M, No $130.3M | SoS Prop 40 page | Verified | Support "$33,413,577"; Opposition "$130,344,804", through 10/22/2026. "Building a Better California" name not on SoS page (largest No committee is "No on Prop 40 - Doctors, Teachers..." $118.7M); left as is (Ballotpedia News, row 29) |
| 29 | Brin $102M, Schmidt $40.2M, Doerr $40M | Ballotpedia News | Verified | Brin $102M; Schmidt $40.2M; L. John Doerr III $40M |
| 30 | Thiel $3M NYT | Fortune Jan 14, 2026 | Verified | "Thiel made the $3 million contribution on December 29 to the California Business Roundtable" |
| 31 | Brin subject to tax, left state (untagged) | Fortune Mar 2026 | Verified | Page and Brin "left for Miami" before the deadline |
| 32 | Labor split | CalMatters guide | Verified | Support: Teamsters, AFSCME, Labor Federation; oppose: CTA, CA Professional Firefighters, State Building Trades |
| 33 | Fact check: partially true, "further the purposes", lowering threshold needs vote | CalMatters fact check | Corrected | "only partially true" verified; exact text "consistent with and furthers the purposes"; expert said lawmakers "probably couldn't lower the threshold," expanding would likely need ballot. Reworded |
| 34 | LAO under $1B/yr; health groups not consulted | LAO; CalMatters guide | Verified | "less than $1 billion per year"; groups "weren't consulted in designing the measure" |
| 35 | For list | CalMatters guide | Verified | SEIU-UHW, Sanders, CA Dem Party, Labor Fed, Sacramento Bee |
| 36 | Against: Newsom | CalMatters Oct 9; GV Wire | Verified | "vocally opposed" |
| 37 | Against: Becerra, Hilton | Wikipedia 2026 billionaire tax | Verified (secondary) | Becerra listed as opposing; Hilton "publicly opposed the tax". Added Wikipedia, 2026 billionaire tax to the Against line |
| 38 | Against: Business Roundtable, CMA, CTA, PP, LA Times | CalMatters guide | Verified | listed as opponents |
| 39 | Poll 45%, down 3 (UC Berkeley IGS) | GV Wire | Corrected | Source: "UC Berkeley–Los Angeles Times poll", 45% of likely voters, down 3 from six weeks earlier |
| 40 | Footnote rules | — | Fixed | "SoS" and "NYT" tags now match Sources lines; added CalMatters Newsom positions line |