Tech founders weigh the future of Silicon Valley as California’s proposed wealth tax sparks uncertainty.
Stories about wealthy tech leaders leaving California have been making headlines, often framed as a reaction to a proposed 5 percent wealth tax. But the real concern in Silicon Valley runs much deeper. The anxiety is not about the tax rate itself. It is about how the tax would be calculated and what it could mean for founders who control companies but have not actually cashed out.
At the center of the debate is a proposed ballot measure backed by a major health care union. While the idea is being sold as a way to raise funds for health services, critics say its structure could create unexpected and damaging consequences for startup founders and investors.
The Voting Power Problem
The key issue lies in how the tax would apply to voting control, not just economic ownership. Many tech companies use dual-class share structures. This allows founders to retain strong voting power even if they own a smaller percentage of the company’s total equity.
Larry Page is a common example used in the debate. He owns only a small percentage of Google’s total shares but controls a much larger portion of its voting rights. Under the proposal, taxes would be based on that voting power. That means Page would be taxed as if he owned far more of the company than he can actually sell.
For founders of private startups, the situation can be even worse. According to reporting, one former SpaceX employee, now building a grid technology company, could face a tax bill during the Series B stage that would exceed the value of his actual stake. In simple terms, the tax could wipe out his paper wealth before he has earned any real returns.
Supporters Say Founders of Silicon Valley Are Overreacting
David Gamage, a law professor involved in shaping the proposal, believes the tech community is reacting too strongly. He argues that founders would not be forced to sell their shares to pay the tax. Instead, the plan includes a deferral option. Founders could place their shares into a special account and delay paying the tax until the shares are sold. At that point, the state would take 5 percent of the proceeds. If the company fails, no tax would be owed.
Gamage also says founders could challenge the default valuation by hiring certified appraisers. These appraisers could estimate what the shares are realistically worth, rather than relying on a formula based on voting control alone. From his perspective, the system allows flexibility and fairness. If a founder builds a hugely successful company, the state shares in the upside. If it fails, the founder is not punished.
Why Founders Still Feel Exposed
Despite these assurances, many founders and tax experts remain uneasy. Valuing private companies is rarely straightforward. Different appraisers can reach very different conclusions without acting in bad faith. Tax analyst Jared Walczak points out that these disagreements can become risky. If California rejects an appraisal, penalties may apply not only to the founder but also to the professional who prepared the valuation.
This creates legal and financial uncertainty at an early and fragile stage of a company’s life. Even with deferrals and alternative appraisals, founders could still face large tax obligations tied to control rather than realized wealth. For many, that risk alone is enough to consider relocating.
What the Proposal Is Trying to Do
The ballot initiative calls for a one-time 5 percent tax on individuals with a net worth above $1 billion. It would apply retroactively to anyone living in California as of January 1, 2026.
The union behind the measure says the goal is to raise funds to offset cuts to health care programs signed into law last year. These include reductions to Medicaid and Affordable Care Act subsidies. Supporters estimate the tax could raise around $100 billion from roughly 200 people.
From their point of view, the wealthiest residents should help fill the gap left by federal cuts and keep emergency rooms and health services operating.
Resistance From Across the Political Spectrum
Opposition to the proposal has been swift and broad. Tech leaders from both political parties have joined forces to push back. A private Signal group reportedly includes figures ranging from conservative investors to major Democratic donors.
Some have labeled the proposal poorly defined and extreme. Others see it as a direct threat to innovation and startup growth in the state.
Several high-profile figures appear to be taking precautionary steps. Larry Page has reportedly bought expensive waterfront properties in Miami. Peter Thiel’s firm has leased office space there as well. While both have had Florida ties before, the timing has fueled speculation that these moves are meant to send a signal.
Even the Governor Is Pushing Back
California Governor Gavin Newsom has also spoken out against the proposal. He has publicly said he believes it will fail and has been working quietly to stop it from advancing.
Newsom argues that the tax could damage California’s economy and reputation as a hub for innovation. While he supports funding health care, he appears concerned that this approach could drive away the very people who help fuel the state’s growth.
The Union Is Not Backing Down
Despite the backlash, the union behind the initiative remains firm. Its leaders say the tax is about saving lives, not targeting success. They argue that those threatening to leave are showing greed rather than civic responsibility.
To make the ballot in November, the proposal must gather 875,000 signatures. If it qualifies, it would need only a simple majority to pass.
Why This Debate Matters
At its core, the issue is not just about taxes. It is about how wealth, control, and risk are defined in a modern startup economy. Silicon Valley thrives on long-term bets, where founders take years of risk before seeing any reward.
A tax system that treats control as cash could change how and where those bets are made. That is why the conversation about leaving California feels more serious this time. It is not about avoiding a 5 percent tax. It is about uncertainty, structure, and trust in how the rules are written.
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