The Tax That's Costing California Money Before It Exists

The ballot measure isn't law. It won't even go to voters until November 3, 2026. But California's proposed billionaire wealth tax has already done something remarkable: it appears to be losing the state revenue before a single vote is cast.

According to the National Taxpayers Union Foundation, which has been tracking the capital flight triggered by the initiative, the departures are significant.

What the Tax Actually Does

The initiative — formally titled the "One-Time Wealth Tax for State-Funded Health Care Programs Initiative" — would impose a 5% tax on the worldwide net worth of California billionaires, valued as of December 31, 2026. It would be paid in annual installments of 1% over five years.

It targets roughly the 200 wealthiest California taxpayers, with proponents projecting it raises $100 billion over five years, or about $20 billion per year. Revenue would fund Medi-Cal, K-14 public education, and food assistance programs.

The $100 billion projection comes directly from the initiative's drafters. The ITEP-published report was co-authored by Brian Galle of Georgetown University Law Center, David Gamage of the University of Missouri, Emmanuel Saez of UC Berkeley, and Darien Shanske of UC Davis — the same academics who helped write the initiative. That connection is worth noting: these aren't independent analysts, but advocates for the measure.

Who's Already Gone

Since late 2025, California has been losing billionaires.

Google co-founders Larry Page and Sergey Brin relocated to Florida, according to ZeroHedge and the National Taxpayers Union. Peter Thiel, PayPal co-founder, also moved to Florida. Travis Kalanick, former Uber CEO, landed in Texas. Billionaire Don Hankey chose Nevada. Even Steven Spielberg — about as Hollywood as it gets — reportedly moved to New York, apparently deciding deep-blue New York was safer than California.

According to ZeroHedge, citing analysis by the Hoover Institution, the departure of just those six men has cut the potential wealth tax revenue by an estimated $27 billion. The Hoover Institution also found that another 20 California billionaires have departure plans ready to execute the moment the initiative passes.

Billionaire investor Chamath Palihapitiya posted on X that he estimates more than $700 billion has already left California, with the total potentially hitting $1 trillion — including possibly his own fortune.

The National Taxpayers Union concluded that California has managed to lose money on a tax that doesn't exist yet.

The Retroactivity Problem

The initiative applies retroactively to anyone who lived in California after January 1, 2026. That means people who left during 2026 — unlike the billionaires who got out in 2025 — might still face a tax bill.

According to ZeroHedge's analysis, attorneys advising those would-be exiles believe the retroactivity clause will NOT survive a constitutional challenge. The state may be threatening people with a provision it cannot actually enforce.

The National Taxpayers Union also flags serious constitutional vulnerabilities beyond retroactivity: the tax targets unrealized gains (you owe money on value you haven't received), valuation of private company stakes is inherently subjective, and the enforcement apparatus California would need to collect this doesn't currently exist.

The Private Company Trap

The initiative taxes unrealized gains in stock owned by employees of private companies. Private company valuations are not set by markets — they're estimates, often contested. ZeroHedge's analysis notes the framers likely understood this implication: forcing private companies to be valued for tax purposes creates pressure toward consolidation and acquisition by larger public entities. Small businesses and their employees get squeezed.

The National Taxpayers Union echoes this concern, noting the tax would "harm company valuations and pressure small businesses toward consolidation."

Why Sacramento Wants It Anyway

California faces a real fiscal problem.

The ITEP-published report points to H.R. 1, signed into law by President Trump, which includes federal spending cuts that KFF projects will create a $19 billion per year budget hole for California's Medi-Cal program. Up to 1.6 million Californians could lose health insurance coverage as a result.

That's a legitimate crisis. The question is whether a wealth tax that's already chasing out the taxpayers it targets is the right solution — or whether it accelerates the state's decline.

What the Media Is Missing

Left-leaning outlets are covering this as a straightforward "billionaires pay fair share" story. That framing ignores the capital flight data entirely.

Right-leaning coverage tends to treat it as pure class warfare, skipping over the real budget pressure California faces from federal cuts.

A tax that drives away more revenue than it collects is a policy failure regardless of ideology. California needs money. Chasing away the people who have it is not a plan.

Looking Ahead

November 2026 is five months away. Before the election, more billionaires will likely leave. More private wealth will relocate to Texas, Florida, and Nevada. The $100 billion projection will shrink further.

If California voters pass this, they'll inherit the legal battles, the enforcement chaos, and the shrunken tax base — while the people they taxed are long gone.

Good policy raises revenue. This one is burning it.