A California tech entrepreneur is sounding the alarm over a proposed state wealth tax targeting billionaires, warning that the measure would drive high-net-worth residents and their businesses out of the state in droves. Joe Lonsdale, co-founder of Palantir Technologies and managing partner at the venture capital firm 8VC, told Fox Business that the proposal would create a "giant sucking sound" as wealth and jobs flee California for tax-friendlier states.
The warning comes as California lawmakers consider legislation that would impose an annual tax on the unrealized capital gains of the state's wealthiest residents. Lonsdale, who relocated his own operations from California to Texas in recent years, told Fox Business that the tax would punish exactly the kind of risk-taking and innovation that built California's economy in the first place.
The wealth tax proposal, pushed by progressive California lawmakers, would levy an annual tax on the unrealized gains of residents whose net worth exceeds a certain billionaire threshold. Unlike traditional capital gains taxes, which apply only when an asset is sold, a wealth tax targets the paper value of holdings, including stock in private companies, real estate, and other investments, whether or not the owner has converted those assets to cash.
Proponents argue the tax would create billions in new revenue for California's budget and reduce inequality. But critics like Lonsdale say the practical effect would be catastrophic for the state's business climate.
Lonsdale framed the issue in blunt terms, warning that taxing unrealized gains forces entrepreneurs to sell off pieces of their companies just to cover the tax bill. That pressure, he argued, discourages founders from building businesses in California at all.
Lonsdale invoked Ross Perot's famous phrase about NAFTA to describe what he believes would happen if the wealth tax passes. The "giant sucking sound," he said, would be the exodus of billionaires, their companies, and the thousands of jobs those companies support.
His concern is not hypothetical. Lonsdale himself moved his firm from Silicon Valley to Austin, Texas, joining a wave of tech founders and investors who have left California over the past several years. Tesla CEO Elon Musk, Oracle co-founder Larry Ellison, and Hewlett Packard Enterprise have all shifted operations or headquarters out of the state, citing taxes and regulation.
The pattern is familiar beyond California. Billionaire investor Bill Ackman has publicly warned that aggressive tax proposals in New York City would similarly punish residents and accelerate capital flight, calling the approach "a disaster" for the local economy.
At the heart of the debate is a fundamental question about what counts as income. Traditional tax law draws a clear line: you owe taxes when you sell an asset and pocket the profit. A wealth tax erases that line.
Consider a founder who starts a company in a garage. The company grows. On paper, the founder's stake is worth billions. But the founder has not sold a single share. Under a wealth tax, the state would demand a cut of that paper value every year.
Lonsdale argued that this creates a perverse incentive. Founders who want to keep control of their companies and reinvest in growth would face annual tax bills that could run into hundreds of millions of dollars. The only way to pay would be to sell shares, diluting their ownership and potentially destabilizing the company.
For private companies, the problem is even worse. There is no public market to sell shares on. A founder might have to find private buyers at a discount or take on debt just to satisfy the tax collector.
California already has the highest state income tax rate in the nation, with a top marginal rate of 13.3 percent. The state has watched a steady stream of high-income residents leave for states like Texas, Florida, and Nevada, which impose no state income tax.
Data from the Internal Revenue Service has shown net outflows of adjusted gross income from California to lower-tax states in recent years. The trend accelerated during and after the COVID-19 pandemic, when remote work made it easier for high earners to relocate without changing jobs.
Supporters of the wealth tax dismiss migration concerns as overblown, arguing that California's quality of life, talent pool, and infrastructure will keep businesses rooted. But Lonsdale pushed back on that framing, pointing to his own decision to leave as proof that the tipping point has already arrived for many founders.
The same dynamic has played out in New York, where developers have warned that aggressive luxury property taxes are driving buyers to relocate south, hollowing out the tax base that progressive policymakers claim to be protecting.
California's wealth tax proposal does not exist in isolation. It fits into a broader progressive strategy to tax wealth rather than income, a shift that has gained traction at both the state and federal level. President Biden proposed a federal minimum tax on billionaires during his administration, and Senator Elizabeth Warren has championed a national wealth tax for years.
At the state level, several blue states have floated similar ideas. New York lawmakers have discussed wealth taxes and expanded property levies targeting high-net-worth residents. In New York City, the Mamdani administration has pursued an aggressive tax agenda that has drawn legal challenges and bipartisan criticism.
Homeowners in New York City have already filed suit over the administration's chaotic rollout of a pied-a-terre tax, arguing that the policy was implemented without adequate notice or legal authority. The litigation underscores the legal risks that accompany wealth-targeting tax schemes rushed into effect without careful design.
Critics see a common thread: progressive governments treating private wealth as a public resource to be tapped at will, with little regard for the economic consequences or the constitutional questions that follow.
Wealth taxes face serious legal obstacles. At the federal level, the Constitution's apportionment clause has long been understood to limit direct taxes on property. Whether a state-level wealth tax would survive judicial review is an open question, but legal scholars on both sides have flagged potential challenges under state and federal equal protection and due process provisions.
California's proposal would almost certainly face litigation. Opponents would likely argue that taxing unrealized gains amounts to a taking of property without a taxable event, a theory that has gained traction in recent court battles over similar measures.
The legal uncertainty itself could deter investment. Entrepreneurs deciding where to incorporate or headquarter a company factor in tax stability. A state that might impose, then lose in court, then reimpose a wealth tax creates the kind of regulatory unpredictability that drives capital elsewhere.
The California wealth tax proposal still faces a long legislative road. It would need to clear both chambers of the state legislature and survive the governor's desk. Governor Gavin Newsom has not publicly endorsed the measure, and moderate Democrats in the legislature have expressed reservations about its economic impact.
But the proposal's very existence sends a signal to the business community. Lonsdale's warning reflects a sentiment shared by many in Silicon Valley and beyond: that California's political class views wealth creation as a problem to be managed rather than an engine to be fueled.
The pattern of tax-driven migration is not limited to billionaires. When high earners leave, they take jobs, spending, and charitable giving with them. The communities they leave behind lose tax revenue, and the burden shifts to middle-class taxpayers who cannot afford to move. Grocery industry leaders have made similar arguments about government-run economic interventions that crowd out private enterprise and leave taxpayers holding the bag.
Lonsdale's "giant sucking sound" warning carries weight precisely because he is not a bystander. He built companies in California, employed thousands there, and then left. His trajectory is a case study in the consequences of tax policy that treats success as a target.
If California passes a wealth tax, it will test whether a state can extract revenue from its wealthiest residents without driving them away. The answer will shape tax policy debates across the country for years.
When the people who build things decide a state is no longer worth the cost, they do not file complaints. They file change-of-address forms. And no legislature has ever taxed a resident who already left.
