California's proposed wealth tax makes business domicile part of the exit analysis

California's proposed Proposition 40 has turned an old tax-planning question into a more urgent one for owners of valuable private companies: If the owner leaves California, should the company remain domiciled there?

The two questions are related, but they are not interchangeable. Proposition 40, which appears on the November 3, 2026 ballot, would impose a one-time wealth tax on certain individuals and trusts. The Legislative Analyst describes the measure as a 5 percent tax on the net worth of billionaires who were California residents on January 1, 2026. The Attorney General's official summary states that covered assets include business interests, securities, art, collectibles, and intellectual property, while real property and certain retirement assets are excluded.

A corporate filing does not determine personal residency. Redomestication can, however, become part of the factual record showing where an owner has placed the center of business activity after leaving California.

For founders, a significant feature of Proposition 40 is that a private-company interest is not outside the tax base merely because there is no public market price.

The initiative contains valuation rules for interests in business entities. It calls for reporting ownership percentage, book value, and book profits, creates valuation presumptions, and permits certified appraisals in specified circumstances. A founder can therefore hold substantial taxable wealth inside an operating company without receiving a comparable amount of current cash.

The practical issue is liquidity. A valuable business interest can produce a large tax base while the owner holds an asset that cannot be sold in small pieces without affecting control or financing. The initiative permits payment over five years at a higher total cost, but the valuation issue remains.

A business owner researching how to transfer a company to Florida should understand that company redomestication is one variable, and an important one at that, but not the entire equation.

The measure looks to personal residency on January 1, 2026. A founder who was a California resident on that date does not change that historical fact by moving the company in October. If Proposition 40 takes effect as written, the relevant residency date has passed.

Company domicile and individual domicile are separate. A California corporation can have a shareholder who lives in Texas. A Nevada LLC can have a member who remains a California resident. Changing the state law governing the entity is not the same transaction as changing the owner's tax residence.

Counsel should therefore determine which tax questions are fixed by past facts and which can be affected by prospective changes. Combining them under the general idea of leaving California can produce an incomplete answer.

California's ordinary residency rules make the distinction more important. Revenue and Taxation Code section 17014 and the regulations under it focus on whether a person is in or outside California for a temporary or transitory purpose. FTB Publication 1031 describes residency through the place where the taxpayer has the closest connections.

The Franchise Tax Board's published residency manual places business and employment connections among the factors that can receive substantial weight. The Appeal of Bragg, 2003-SBE-002, likewise identifies business interests as part of the objective facts considered when determining residency.

A recent POLITICO report on Proposition 40 described tax advisers preparing for intensive residency disputes and noted that California investigators can examine where business interests are located alongside the taxpayer's home, family, professional relationships, and ordinary activity.

Redomestication can affect one part of that record. It cannot supply the rest.

Consider a founder who moves from California to Florida but keeps the operating corporation incorporated in California, keeps its principal office there, holds board meetings there, and continues managing senior employees from that location. The founder may have changed a driver's license and purchased a Florida home, but the business facts still point back to California.

Now consider a different record. The owner moves the principal management function, corporate books, and operating headquarters to the new state. The company redomesticates where permitted and keeps only the California operations that the business needs.

The second fact pattern does not guarantee nonresidency. It does make the company's legal and operational records more consistent with the claimed move.

That distinction matters because California does not treat voter registration or a new driver's license as conclusive. FTB guidance states that no single residency factor controls and that the strength of the taxpayer's connections matters more than a simple count of contacts.

A business should not confuse changing domicile with ending California nexus. When transferring a business to a new state, a multi-state tax nexus should be completed by competent tax counsel.

California treats an entity as doing business in the state under several tests, including activity for financial gain and thresholds based on California sales, property, or payroll. A company that moves its legal domicile but retains employees, inventory, offices, or substantial California activity can remain subject to California registration and tax obligations.

The owner can therefore have two separate post-move files. One concerns personal residency. The other concerns the company's California-source activity and entity-level filing obligations.

The stronger planning record acknowledges both. It does not claim that a redomesticated company ceased doing business in California when the facts show continuing California operations.

Proposition 40 is not current law. It remains a ballot measure as of October 2026. The Legislative Analyst also notes potential interaction with Propositions 41 and 42. Proposition 42 would prohibit new state taxes on personal property and certain retroactive taxes, and a conflict could affect Proposition 40 depending on vote totals and subsequent legal analysis.

That uncertainty favors separating reversible planning from irreversible transactions. A company should not redomesticate merely because a ballot measure exists. The decision should make independent business sense based on governance, recurring taxes, regulatory obligations, and where management operates.

For an owner who has already decided to relocate the enterprise, however, leaving the entity behind can create an unnecessary mismatch between personal and business facts.

The California wealth-tax debate illustrates a broader point. Tax residency is proved through conduct, records, and economic relationships. Entity domicile is only one item, but for founders whose principal asset is their company, it can be significant.

A well-planned departure should avoid two opposite mistakes. The first is assuming that moving the company automatically moves the owner. The second is moving the owner while leaving the core business facts anchored in California without a business reason.

Proposition 40 may pass, fail, or become entangled with competing ballot measures and litigation. Those outcomes do not change the planning principle. When a business owner makes a genuine interstate move, the legal domicile of the company should be reviewed alongside the owner's residence, the company's operating footprint, and the tax obligations that remain in California.

This article was written in cooperation with Cummings & Cummings Law