California voters will decide this November on Proposition 40, a ballot measure that would establish a one-time wealth tax on the state’s wealthiest residents. Known as the "billionaire tax," the proposal seeks to levy a 5 percent tax on individuals and trusts with assets exceeding $1 billion. The measure includes a retroactive clause, setting the valuation date for these assets at January 1, 2026, a provision intended to prevent residents from avoiding the tax by relocating before the election.
The proposal comes amid a period of significant growth in California’s state spending and shifts in its population. Since the start of the century, state general expenditures have risen by over 200 percent to $248 billion, while the population grew by 15 percent. This increase resulted in per-resident spending rising from $2,300 to approximately $6,300. However, the state recorded its first-ever population decline in 2021, attributed by some analysts to high housing costs, taxes, and a stagnant job market.
Current polling indicates a divided electorate regarding Proposition 40, with 48 percent of voters in favor and 41 percent opposed. California is currently home to approximately 200 billionaires, representing about one-fifth of the total billionaire population in the United States. Proponents argue the tax would provide necessary revenue for Sacramento, while critics, including Texas billionaire Mark Cuban, suggest the tax could force the sale or liquidation of companies as founders seek cash to cover the obligation.
The scale of the tax is significant for state finances, targeting a group that holds a substantial portion of the state's private wealth. If passed, the measure sets a precedent for wealth-based taxation rather than income-based taxation, a shift that could influence future policy discussions in other states or at the federal level. For the broader public, the impact would be felt through the distribution of the resulting revenue to state programs, though the specific allocation of these funds was not reported. Employees of companies owned by these billionaires could see shifts in corporate governance or stability if owners are forced to sell shares to meet the tax requirement.
What happens next depends on the November general election results. If approved by voters, the tax will be applied to asset values as they stood on January 1, 2026. While many billionaires reportedly left the state prior to that date in anticipation of the measure, those remaining would be subject to the new requirements. The specific deadline for payment and the exact mechanism for asset appraisal for complex holdings like intellectual property remain to be finalized through state regulatory processes if the measure passes.