Moving Out of California? The Billionaire Wealth Tax Fight and Your Assets

Have you ever wondered what happens if a state tries to tax you after you pack your bags and move away? At Christiansen Accounting, we field questions daily about the tax implications of leaving California.

That very question is sparking a legal clash over California’s proposed 2026 Billionaire Tax Act. This upcoming ballot initiative proposes a one-time 5% tax on the worldwide net worth of billionaires who claim California residency as of January 1, 2026.

While proponents argue it will generate funding for healthcare and social programs, critics caution it could prompt relocations and tax individuals who no longer live here.

What the 2026 Billionaire Tax Proposes

Advocates are pushing to get this measure on the November 2026 ballot. If passed, it would:

  • Levy a one-time 5% excise tax

  • Target individuals or trusts with a net worth of $1 billion or more

  • Establish January 1, 2026 residency status as the determining benchmark

  • Tax worldwide assets

The revenue would mostly support healthcare, with the rest going toward education and food assistance. According to the California Legislative Analyst’s Office (LAO), the levy could raise “tens of billions of dollars” starting in 2027. Yet, the LAO also cautioned that if impacted taxpayers leave, it could trigger a drop in state income tax revenues—costing hundreds of millions annually.

Federal Intervention: The Keep Jobs in California Act

This wealth tax proposal hasn't gone unnoticed. U.S. Representative Kevin Kiley (R-CA) introduced the Keep Jobs in California Act (H.B. 7619).

This federal bill seeks to block any state from enforcing a retroactive tax on a nonresident’s assets for a period before the tax existed, provided they no longer live there. Kiley specifically framed the tax as an “unprecedented attempt” to retroactively tax people who have already departed.

Importantly, this legislation doesn’t stop states from taxing current residents; it strictly targets retroactive taxation.

Constitutional Concerns and Migration Risks

Applying a retroactive tax to wealth introduces constitutional debates. Legal experts point to potential roadblocks:

  • Due Process violations

  • Infringement on the constitutional right to travel

  • Commerce Clause restrictions

  • Jurisdictional limits on taxing global assets

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California uses a rigorous residency test scrutinizing domicile, presence, and intent. Taxing former residents will undoubtedly trigger legal battles.

The Bottom Line on Residency

Several competing ballot measures are also in the works, ranging from requiring a two-thirds voter threshold for new taxes to protecting personal savings and clarifying residency rules.

For taxpayers, the lesson is clear: Residency is not just a mailing address. It can determine whether your wealth is taxable, even after you move.

Questions about exit tax planning? Reach out to Christiansen Accounting. Corina Christiansen and our staff of seven are here to guide you. Contact us today.

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