Understanding the Controversial California Billionaire Tax Proposal
As the exodus of billionaires from California continues to make headlines, it’s important to delve into the specifics driving this phenomenon. Contrary to popular belief, it’s not just about the 5% tax rate. The real cause of concern lies in the proposed wealth tax that targets founders’ voting shares rather than their actual equity ownership.
Take Larry Page, for example, who owns about 3% of Google but controls a significant 30% of its voting power through dual-class stock. Under the proposed tax plan, Page would be required to pay taxes on that 30% voting control. For a company valued in the hundreds of billions, this tax burden is far from negligible. In fact, reports suggest that a founder of a startup working on grid technology could potentially face a tax bill at the Series B stage that would wipe out their entire holdings.
David Gamage, a law professor at the University of Missouri involved in crafting the proposal, believes that the reaction from Silicon Valley is exaggerated. He suggests that founders can seek advice from tax experts to navigate the tax implications. Gamage assures that founders wouldn’t be forced to sell their shares immediately. Instead, they could opt for a deferral account for assets that they prefer not to be taxed on immediately, with California taking a 5% cut whenever those shares are eventually sold. This approach allows for a share of the gamble in case of a successful startup, without penalizing founders in case of failure.
However, the process is not without its challenges. Calculating valuations for startups that aren’t publicly traded is complex and subjective. Tax experts caution that different appraisers could arrive at vastly different conclusions, adding to the uncertainty for founders. Even with alternative valuations, founders could still face hefty tax bills on the control they hold but the wealth they haven’t realized.
The proposed one-time 5% tax on individuals worth over $1 billion, advocated by California’s health care union, has sparked fierce opposition from various quarters. Silicon Valley elites have formed a group called “Save California” to challenge what they perceive as a poorly defined and communistic tax proposal. Some prominent figures, like Larry Page and Peter Thiel, have already taken preemptive measures by investing in properties and relocating offices outside California.
Even Governor Gavin Newsom has joined the fight against the tax proposal, expressing confidence that it will be defeated. Despite the resistance, the health care union remains steadfast in its mission to generate revenue for essential health care services.
As the proposal inches closer to the ballot, with 875,000 signatures needed for November’s election, the debate surrounding the California billionaire tax shows no signs of abating. Stay tuned for further developments on this contentious issue.
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San Francisco
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October 13-15, 2026

