Photo via Reason

California's 'Wealth Tax' Could Cost the State $39 Billion

Read the original at Reason ↗
Cite

Boehm, E. (2026, October 20). California's 'Wealth Tax' Could Cost the State $39 Billion. Reason. https://reason.com/2026/10/20/californias-wealth-tax-could-cost-the-state-39-billion/

Dated from the outlet's own feed. Check the original for its byline.

Reason · collected 2026-10-20 · by Eric Boehm

Quick Summary

Researchers at Stanford University warn that California's proposed "wealth tax" on billionaires could backfire, potentially costing the state $39 billion in lost income taxes if wealthy residents leave. The ballot measure, Proposition 40, would impose a one-time 5 percent tax but may generate only about $30 billion due to anticipated departures of some billionaires, such as Peter Thiel and Larry Page, who together represent over $539 billion in wealth. This proposed tax has split the Democratic party, with Governor Gavin Newsom opposing it while Rep. Ro Khanna supports it, highlighting the contentious debate surrounding its potential economic impacts.
Written by AI on 2026-10-20, from this article's own text only (the story summary below draws on all the coverage).

AI analysis

Story summary

California voters will decide next month whether to approve Proposition 40, a proposal aimed at generating billions for healthcare by imposing a one-time 5% tax on billionaire wealth. However, Stanford University economists Benjamin Jaros and Joshua Rauh caution that this measure could backfire, potentially resulting in the state losing more money than it gains. Their study, published by the National Bureau of Economic Research, indicates that seven billionaires have already moved out of California, taking with them about $540 billion or 30% of the state's total billionaire wealth. This includes well-known figures like Peter Thiel and Larry Page. The researchers estimate that while the tax might generate around $30 billion, long-term income tax losses could range from $1 billion to $3.5 billion annually, totaling up to $39 billion over time.

Written for “California Wealth Tax Backlash” on 2026-11-04, grounded in this article and the 1 other(s) covering the same event.

Story

📰 California Wealth Tax Backlash
Economy/Business · 2 article(s) covering the same event. See how they differ ↓

Compared with similar articles

This article reads unscored and hedges 21% of its claims. Each row says how that neighbour differs.
CBS News
Hedges 6 of 20 claims Outlet record 65/100
Toronto Star
⚖️ Leans left Hedges 2 of 5 claims Outlet record 64/100
“The articles discuss different aspects of a proposed wealth tax in California but describe distinct events: one focuses on potential economic impacts, while the other reports on Mark Zuckerberg's deal with Meta to pay the tax.”
New York Post
Hedges 5 of 18 claims Outlet record 66/100
“Article A discusses a broad economic impact of a proposed wealth tax on California's billionaires, while Article B focuses on Mark Zuckerberg's specific threat to leave California if the tax is implemented.”
How this article was measured signals, leaning charts, publisher record, byline, topics and claims

Signals How these are calculated →

Claims extracted
19
sentences that state something as happening or true
Uncertain
21%
4 of 19 hedged ("reportedly", "may", "according to")
Leaning
withheld
no quote in the article backed the model's score
Publisher signals
67/100
Reason's corrections and hedging, across everything collected from it. Not a measure of accuracy.
Outlets on this story
2
Economy/Business
Same framing elsewhere
1
articles that frame the event the way this one does
Analyzed 2026-10-20 · how these are computed

How this is being covered How these are calculated →

Article leaning vs. publisher reliability
Source leaning vs. consistency

Publisher

Reason · 1111 article(s) · 4 correction(s) detected
Running correction rate · 4 correction(s)

Who wrote this

Eric Boehm
23 article(s) here · 1 carrying a prediction
🔮 His influence over American politics will only wane from here, and both his party and the country will likely be better off as a result.
🔮 As he campaigned on behalf of Rep. Ashley Hinson (R–Iowa) on Sunday, President Donald Trump boasted that he could have "won the Vietnam War in a week."
🔮 An underappreciated facet of the controversy that has rocked the Alaska Senate race: Voting reforms adopted by the state in 2020 will likely blunt the effectiveness of an apparent Democratic scheme to place a second candidate named Dan Sullivan on the ballot.
🔮 The New York Times reports that Democrats will move quickly on four items that are "consensus items among their members that are basic enough to bypass time-consuming committee consideration and go straight to the floor."
2026-10-30 · mixed framing · What Will Democrats Do?
🔮 Next week's election is a pivotal one for Colorado, as voters will decide a pair of ballot questions that could secure the state's low-tax, small-government reputation—or shatter it.
🔮 Habba will get $50 million over five years to do unspecified work for a company that barely exists, according to The New York Times, while Herrera got a presidential pardon for a 2025 campaign finance charge.
2026-10-22 · assertive framing · The Swamp King
🔮 A proposed "wealth tax" on California's billionaires could backfire and cost the state tens of billions of dollars in the long run.
🔮 America's interminable war with Iran has killed thousands, disrupted commerce that flows through the Strait of Hormuz, and raised prices on the home front. But there may be one silver lining.
🔮 The White House has not said when the purchases will be made, what prices will be paid, or who will be paying (private companies or taxpayers), though the Treasury announced that it would be issuing a "temporary general license to allow the supply of Russian diesel to the global market."
🔮 Instead, Rep. John James (R–Mich.) has introduced a bill that would use some tariff revenue to offset the economic harm being caused by…the tariffs.
Also by Eric Boehm
What Will Democrats Do?
2026-10-30 · Reason
Nothing else under this byline is closely related to this article, so these are simply their most recent.
All 23 articles by Eric Boehm →

Topics

California Democrats Proposition 40 Stanford University the Billionaire Tax Act

Subjects

California GPE · 6× America GPE · 1× Benjamin Jaros PERSON · 1× Calif. GPE · 1× Democrats NORP · 1× Gavin Newsom PERSON · 1× Joshua Rauh PERSON · 1× Peter Thiel PERSON · 1× Ro Khanna PERSON · 1× Stanford University ORG · 1×

Narrative

Including those two, the seven billionaires who have publicly said they are leaving the state represent more than $539 billion of the nearly $1.9 trillion aggregate net worth of California's billionaires, the researchers note.
framing: mixed · carried by 1 article(s) · first seen 2026-10-20
🔮 A proposed "wealth tax" on California's billionaires could backfire and cost the state tens of billions of dollars in the long run.
2026-10-20 · Reason
California's 'Wealth Tax' Could Cost the State $39 Billion · mixed framing

Claims (19 extracted, 4 hedged)

A proposed "wealth tax" on California's billionaires could backfire and cost the state tens of billions of dollars in the long run. uncertain
tax → propose → run
If the proposed tax drives wealthier residents out of the state, California could end up losing between $1 billion and $3.5 billion annually in income taxes, according to a working paper published this week. uncertain
California → propose → paper
A pair of researchers at Stanford University warn that the state could end up losing an estimated $39 billion because of the consequences of the wealth tax. uncertain
state → warn → tax
"These findings suggest that the Billionaire Tax Act will not fulfill the primary functions for which it was designed," write researchers Benjamin Jaros and Joshua Rauh. asserted
Jaros → suggest → which
Voters in California will decide next month whether to impose the one-time, 5 percent tax when they vote on Proposition 40. asserted
they → decide → Proposition
The ballot measure is dividing Democrats—Gov. Gavin Newsom opposes it, while progressive Rep. Ro Khanna (D–Calif.) claims it is the "most important ballot initiative in America and a fight for the soul of our party. uncertain
it → divide → party
" And it's already spurring some billionaires to flee the state—including venture capitalist Peter Thiel and Google co-founder Larry Page. asserted
it → spur → Thiel
Including those two, the seven billionaires who have publicly said they are leaving the state represent more than $539 billion of the nearly $1.9 trillion aggregate net worth of California's billionaires, the researchers note. asserted
researchers → include → billionaires
With other departures likely happening more quietly, the new study estimates that the tax will generate about $30 billion, a far cry from the $100 billion that the tax's supporters expect. asserted
supporters → happen → that
The "behavioral response" from billionaires in California "has eroded most of the projected tax base," write Jaros and Rauh. asserted
Jaros → erode → base
In the long run, however, the state is likely to lose out. asserted
state → lose → run
After running 100,000 simulations using different assumptions, the two researchers report that "85 percent of plausible outcomes produce a negative" result in state revenue. asserted
percent → run → revenue
Other recent experiments with special taxes on wealth have backfired in similar ways. asserted
experiments → backfire → ways
In response to a new wealth tax in Washington State, Jeff Bezos relocated to Florida, and iconic Seattle brand Starbucks shifted more of its corporate headquarters to Tennessee. asserted
Starbucks → relocate → Tennessee
Studies have shown that a "millionaires tax" in Massachusetts contributed to wealth moving out of that state. asserted
wealth → show → state
And if you were a billionaire living in California, why would you stick around? asserted
you → live → California
Polls show voters are narrowly divided over Proposition 40. asserted
voters → show → Proposition
A Politico poll published earlier this month showed 46 percent of voters plan to vote for the measure, while 43 percent oppose it. asserted
percent → publish → it
Voters were similarly divided when asked if they expected it to pass or not. asserted
it → divide → ?
💬Give feedback · no sign-in needed

No sign-in needed for now. Your note is sent without a name, so it cannot be answered.

🕘History 🎫Support