California's Proposition 40 Wealth Tax
News · Heat 9.8 / 10 · 10 shows · 1h 22m airtime
California voters decide Proposition 40 on November 3, 2026, a 5% one-time tax on the wealth of the state's roughly 250 billionaires to fund healthcare, projected to raise around $100 billion. Opponents have raised $333 million, mostly from Sergey Brin, and Planned Parenthood and the California Teachers Association also oppose it. A late September poll put support at 45% to 42%. The residency question is contested: one account says seven billionaires holding $540 billion left before the January 1 snapshot, while economist Gabriel Zucman says none did. Hoover scholars estimate a $40 billion shortfall; Zucman says three million would lose Medicaid if it fails.
How 10 podcasts covered it
- Today, Explained, 2026-09-09 (2:10 to 13:28)
Breaks down Proposition 40 with Politico
Jeremy B. White of Politico walks through Proposition 40: the 5% one-time tax on roughly 200 California billionaires, the Democratic split with Newsom opposed and Sanders and Khanna in favor, Sergey Brin's tens of millions against it, and polling in the low 50s.
New angle: The main opposition group has booked around $100 million worth of airtime against Proposition 40. - Today, Explained, 2026-09-09 (15:40 to 25:41)
Pits two economists against each other on Prop 40
Pits two tax-policy economists against each other on Proposition 40: Rau argues the one-time levy would drive billionaires out and raise little, Young counters that research on state millionaire taxes shows no to very little migration and pitches taxing unrealized gains as income instead. - Up First, 2026-10-03 (7:16 to 10:59)
Walks through Proposition 40 and its opposition
KQED's Marisa Lagos walks through Proposition 40: the union behind it, the $2.3 trillion in billionaire wealth it targets, and the Medicaid cuts it would backfill. Adds the measure's opposition roster - Planned Parenthood and the California Teachers Association - and Third Way's read on Newsom's 2028 calculus.
New angle: Planned Parenthood and the California Teachers Association oppose Proposition 40. - The NPR Politics Podcast, 2026-10-07 (0:15 to 21:49)
Breaks down Proposition 40's mechanics and revenue
Walks through the mechanics of Proposition 40 - the self-attestation on state tax returns, the asset list, the exclusion of most real estate - and puts a figure on the measure's revenue: about $100 billion. Also updates the Brin number to over $80 million and adds his claim that he has moved to Reno.
New angle: The measure would raise around $100 billion, and Sergey Brin has put over $80 million into fighting it. - Morning Brew Daily, 2026-10-19 (7:34 to 11:18)
Lays out the Prop 40 ballot fight
Lays out the ballot fight over Proposition 40: the 5% net worth tax, the $340 million opposition war chest, the relocations by Thiel, Page and Brin, Sanders' endorsement, and a late September poll showing the lead narrowing to three points. Also flags the companion propositions 41 and 42.
New angle: A late September University of California poll put Prop 40 at 45% support to 42% opposition, down from a seven-point lead a month earlier. - The Headlines, 2026-10-20 (0:31 to 2:48)
Recaps the billionaire tax and widens the map
Recaps the California billionaire tax measure - the 5% one-time levy, the roughly $100 billion for Medicaid backfill, the opposition ad blitz - and widens to Washington state's millionaire income tax and Democratic candidates' pledges. A broad retelling that stays inside the existing record. - The Dan Bongino Show, 2026-10-22 (50:25 to 52:26)
Reads the study of billionaires leaving California
Reads a Wall Street Journal piece on a new study of Prop 40 and lands on its numbers: seven billionaires with $540 billion in wealth left California before the residency date, wiping out nearly 30 percent of the estimated tax base. The first study figure on the record, set against the earlier fiscal analyst's warning.
New angle: Seven billionaires holding $540 billion left California before the residency date, erasing nearly 30 percent of the estimated tax base. - Morning Wire, 2026-10-23 (1:46 to 5:21)
Explains Prop 40's retroactivity and revenue risk
Explainer on Proposition 40 that goes past the polling and the war chest to the legal exposure: the January 1, 2026 residency date makes the tax retroactive, and scholars say that could run into the 14th Amendment. Adds a Hoover Institution estimate of $40 billion in lost state revenue and Meta's stock workaround to keep Zuckerberg in California.
New angle: Hoover Institution scholars estimate Prop 40 would leave the state about $40 billion short; Meta created a new share class so Zuckerberg can cover a $12.5 billion liability. - Squawk Pod, 2026-10-28 (12:12 to 13:29)
Sets up the debate and Brin's $100 million
Sets up the Proposition 40 debate: the 5% billionaire tax, the November 3 ballot date, and Sergey Brin's $100 million to the opposition. Introduces Zucman, an architect of the plan, against Rauh, who says it will drive capital out of California.
New angle: Sergey Brin has given $100 million to groups opposing Proposition 40. - Squawk Pod, 2026-10-28 (13:17 to 17:10)
Debates the exodus myth and opposition spending
The Zucman-Rauh debate proper: Zucman argues the tax is popular and the feared exodus is a myth, Rauh cites prediction markets at 25 to 30 percent and warns founders take jobs with them. Adds the size of the opposition spending and Zucman's claim that no billionaire managed to leave before the January 1 snapshot.
New angle: Opponents have spent more than $300 million fighting Proposition 40, and Zucman says no billionaire left California before the January 1 snapshot. - Squawk Pod, 2026-10-28 (17:10 to 19:32)
Disputes the fiscal-emergency premise with budget figures
Rauh, in the debate, disputes the fiscal-emergency premise behind Proposition 40 with budget figures: Medi-Cal funding up 123 percent since 2019, general fund spending up 79 percent over seven years. Zucman answers that three million Californians lose coverage if it fails.
New angle: Rauh says Medi-Cal funding is up 123 percent since 2019 and general fund spending up 79 percent over seven years. - Squawk Pod, 2026-10-28 (19:32 to 21:52)
Warns three million lose Medicaid if Prop 40 fails
Zucman puts a number on the stakes: three million Californians lose Medicaid if Prop 40 fails, and he says Newsom concedes there is no plan B. Rauh counters with the cost of covering undocumented immigrants and the state's balance sheet.
New angle: Zucman says three million Californians would lose Medicaid if Proposition 40 fails, and that Newsom agrees there is no plan B. - Squawk Pod, 2026-10-28 (21:55 to 24:36)
Compares French and California wealth concentration
Zucman, pressed on France, puts wealth concentration on the record: France's 500 richest hold wealth equal to 35 percent of GDP, California's 250 billionaires hold 50 percent of state GDP, equal to the income of 20 million families. The hosts counter that wealth creation is not zero-sum.
New angle: California's 250 billionaires hold wealth equal to 50 percent of state GDP, or the income of 20 million families. - The Daily Show: Ears Edition, 2026-10-30 (13:37 to 20:07)
Reports four of five billionaires already left
Field report on the California ballot proposal taxing billionaires' net worth at 5%, with the March for Billionaires organizer and Tom Steyer, who backs taxing himself. Notes four of the state's five richest billionaires have already left.
New angle: Four of California's five richest billionaires have already left the state. - Hard Fork, 2026-10-30 (33:45 to 38:26)
Sizes the $333 million fight against Prop 40
Lays out the measure and the money against it: a $333 million opposition committee funded mostly by Sergey Brin, with John Doerr and Patrick Collison brought in, and Planned Parenthood as a partner because the one-time tax is not sustainable funding.
New angle: Building a Better California has raised $333 million against Prop 40, mostly from Sergey Brin.