California’s latest tax proposal is sending shockwaves through Silicon Valley, targeting not just wealth but the very control founders hold over their companies.
A proposed “billionaire tax” in California, set at a 5% rate, has ignited fierce debate for taxing tech founders based on voting control rather than actual economic ownership, potentially reshaping the state’s innovation landscape.
This proposal, which won’t appear on the ballot until November, includes a retroactive residency clause dating back to January 1, 2026. It has already prompted an estimated $1 trillion to exit the state, with reports indicating that prominent figures like Google co-founders Larry Page and Sergey Brin may have left.
According to the New York Post, the core issue lies in the tax’s “fine print,” which treats voting shares as equivalent to ownership. Founders with dual-class stock structures, common in tech, could face taxes on control percentages far exceeding their actual wealth.
For instance, Larry Page holds roughly 3% of Google’s shares but wields 30% of its voting power. Under this tax, he’d owe based on the larger control figure, not his smaller economic stake.
This approach disproportionately impacts innovators who retain the majority say in their firms through such structures. Critics highlight how it could deter startup launches in California.
For startups, especially private ones, the tax poses a valuation nightmare. Calculating worth is inherently complex, often yielding varied results, and missteps could lead to penalties for both companies and individuals involved in the assessment.
Jared Walczak, a state tax expert at the Tax Foundation, noted, “For a startup that isn’t publicly traded, calculating a valuation is inherently difficult. These are not clear cut — you could come to a very different conclusion not because of dishonesty.”
The risk is real: if California disputes a valuation, both the company and the person behind the calculation could face financial consequences. This adds a layer of uncertainty for young firms.
Critics argue this tax is a direct hit on California’s tech ecosystem, designed to punish rather than foster growth. They see it as a policy that could drive founders and their groundbreaking ideas out of state.
Joe Malchow, founding partner at Bay Area venture capital firm Hanover, shared a stark example. He described a recent startup of SpaceX alumni tackling California’s energy grid issues, where the founder’s voting shares equate to 30% control of a company valued in the billions.
Despite a much smaller economic stake, Malchow warned the tax would burden this founder with a bill on “phantom wealth,” potentially wiping out holdings by Series B. He added, “At the Series B, this founder would be taxed an amount that vitiates his entire holdings.”
Garry Tan, head of Y Combinator, California’s leading startup incubator, has publicly decried the proposal as poorly thought out. He argued it could force icons like Page and Brin to leave, claiming the tax might “confiscate 50% of their Alphabet shares.”
Not all founders oppose the measure, though. NVIDIA’s Jensen Huang told Bloomberg TV he’d be “perfectly fine” with it, showing a rare divergence in tech’s reaction. Even political figures like Governor Gavin Newsom, often aligned with progressive policies, have pledged to block the proposal. This unusual coalition of opposition underscores the tax’s divisive nature and potential to reshape California’s economic future.