California’s Wealth Tax Gamble: Will Billionaires Flee?
California’s Billionaire Tax Showdown: What You Need to Know About Proposition 40
What Is Proposition 40?
Imagine California has a giant piggy bank. Right now, the state needs more money for healthcare and food assistance. Proposition 40 is a ballot measure that asks voters: Should we take a one-time 5% slice of the wealth from the state’s roughly 250 billionaires to fill that piggy bank?
- It’s a wealth tax, not an income tax. That means it’s based on what billionaires own (stocks, companies, property), not just what they earn in a paycheck.
- It’s one-time only. Not every year — just once.
- It targets the tippy-top. Not the top 1%, but the top 0.0001% — about 250 people who together hold $2.4 trillion in wealth.
Important Point: This tax would only apply to people who were California residents as of January 2026. Moving away after that date wouldn’t let them dodge the bill.
Why Was This Tax Proposed?
The Backstory: A Federal Funding Cliff
In 2025, President Trump signed a massive tax and spending law nicknamed the "One Big Beautiful Bill." Among other things, it slashed federal funding to states — including California — for programs like Medicaid (healthcare for low-income people).
The Consequence
Union leader Dave Regan (president of SEIU United Healthcare Workers West) warned that millions of Californians could lose health coverage in the coming years because of those federal cuts.
The Solution
Regan and his union crafted Proposition 40 as a "five-year bridge" — a temporary fix to backfill the lost federal money and keep people insured while lawmakers figure out a long-term plan.
Where Would the Money Go?
If passed, the tax revenue would be split like this:
| Portion | Purpose |
|---|---|
| 90% | Healthcare services (hospitals, clinics, insurance subsidies) |
| 10% | Food assistance (like CalFresh/SNAP) and public education |
Who Supports It?
- Dave Regan & SEIU United Healthcare Workers West — the main architects
- Billionaire Tax Now coalition — healthcare workers, labor groups, progressive advocates
- Supporters’ argument: The ultra-rich have benefited enormously from California’s infrastructure, universities, and talent pool. A one-time 5% ask is fair — especially when millions face losing healthcare.
Regan’s take: "You are now one of the five wealthiest people in the world in the state that made you rich, enormously rich. California needs to stabilize its healthcare system."
Who Opposes It?
A surprising coalition has formed against the measure:
| Opponent | Reason |
|---|---|
| Tech billionaires (Sergey Brin, Eric Schmidt, Peter Thiel, John Doerr, Chris Larsen) | Say it’s "socialism," will drive wealth creators away |
| Gov. Gavin Newsom (Democrat) | Warns it hurts California’s economy, powered by Silicon Valley |
| California Medical Association (Dr. René Bravo) | Calls it unstable — a short-term fix that creates long-term uncertainty for patients |
| California Chamber of Commerce | Notes 1% of residents pay ~50% of state income taxes; fears capital flight |
| Libertarian economists (e.g., Adam Michel, Cato Institute) | Argue wealth taxes destroy innovation and drive away future billionaires |
The Billionaire War Chest
- Sergey Brin (Google co-founder) alone put $102 million into Building a Better California, a group fighting Prop 40.
- The group also backs a rival ballot measure that would invalidate the wealth tax.
- Brin recently moved to the Nevada side of Lake Tahoe — critics call it a tax-motivated exit; Brin calls it principle.
Brin’s words: "I fled socialism with my family in 1979 and know the devastating, oppressive society it created in the Soviet Union. I don’t want California to end up in the same place."
The Big Debate: Will Billionaires Leave California?
This is the core disagreement — and it matters because California relies heavily on its richest residents for tax revenue.
Side A: "They’ll Flee!" (Opponents)
- Adam Michel (Cato Institute): "We should expect not just targeted billionaires to leave, but anyone that expects to be a billionaire… to leave."
- Bloomberg estimate: The tax could cost Brin personally ~$13 billion.
- Argument: High taxes = capital flight = budget disaster.
Side B: "They’ll Stay!" (Supporters & Some Economists)
- Thomas Piketty (famous French economist): "Capital flight" is overstated. If you built your fortune using a country’s roads, schools, and legal system, you shouldn’t escape the bill.
- Dave Regan: The tax applies based on residency in January 2026. Moving now doesn’t help. And a one-time 5% hit won’t break a billionaire.
- Evidence: California’s billionaire population has grown despite high income taxes.
Key Fact: California’s Chamber of Commerce estimates 1% of residents pay nearly 50% of all state personal income taxes. So even a few departures could sting.
What Do the Polls Say?
Californians are nearly evenly split. Recent polls show a statistical dead heat — meaning every vote will count in November.
Important Points to Remember
- This is a ONE-TIME 5% tax on ~250 billionaires’ assets, not income.
- 90% funds healthcare, 10% funds food aid & schools.
- It was designed to plug a hole from federal Medicaid cuts (Trump’s 2025 "One Big Beautiful Bill").
- Billionaires can’t dodge it by moving now — residency is locked to January 2026.
- Tech billionaires are spending $100M+ to defeat it — including a rival ballot measure.
- Even some Democrats and doctors’ groups oppose it — calling it unstable and risky.
- Economists fiercely disagree on whether billionaires would actually leave.
- Polls show a toss-up — the outcome is genuinely uncertain.
Summary
California voters face a historic choice in November: Should the state impose a first-in-the-nation, one-time 5% wealth tax on its ~250 billionaires to fund healthcare and safety-net programs — or is that a dangerous experiment that could drive away the engine of the state’s economy?
- Supporters see it as a fair, targeted fix to a crisis caused by federal cuts.
- Opponents see it as a slippery slope toward instability, capital flight, and broken promises.
There’s no perfect answer — but the stakes are massive. Millions of Californians’ healthcare hangs in the balance, and the result could shape wealth-tax debates nationwide.
FAQ
1. Is this an annual tax?
No. It’s a one-time 5% tax on assets held by California billionaires as of January 2026. It does not repeat yearly.
2. Could a billionaire just move to Nevada or Texas to avoid it?
Not if they move after January 2026. The tax is based on residency at that time. Moving later doesn’t erase the obligation.
3. Who decides how the money is spent?
The measure legally directs 90% to healthcare and 10% to food assistance and education. However, opponents (like the California Medical Association) worry lawmakers could find loopholes to redirect funds.
4. Why do some doctors oppose a tax that funds healthcare?
Dr. René Bravo (California Medical Association) argues a one-time infusion creates false stability — patients get coverage for a few years, then face a cliff when the money runs out. He wants a permanent, reliable funding system instead.
5. Has any other U.S. state done this?
No. Proposition 40 would be the first state-level wealth tax on billionaires in U.S. history. That’s why it’s watched so closely — it could set a national precedent.