The California Problem

Why moving abroad doesn't sever your home state's claim — and what actually does.

A family that has decided to leave California typically believes that leaving is the act that ends California’s tax claim on them.

It is not.

The Franchise Tax Board does not recognize foreign residency, foreign tax payments, or foreign address registration as having severed the family’s California domicile. The state’s claim to tax the family’s worldwide income persists until the family has affirmatively established a different domicile under California’s specific rules — and the rules are different from what most families assume.

The same pattern, with different statutory mechanics, applies to New York, Massachusetts, Connecticut, and the other high-tax states with developed residency-audit infrastructure. The state’s first answer to “I no longer live here” is not yes. The state’s first answer is to look at the facts and decide whether the family’s move actually meets the legal standard for severance, which is higher than most families understand.

This piece outlines the mechanics, failure modes, and the correct sequence. The cost of getting it wrong is not theoretical. The FTB has dedicated residency-audit groups, an aggressive look-back posture, and the legal authority to assess back taxes, interest, and penalties for years the family thought were resolved. New York is, in some respects, even more aggressive. The states with smaller audit infrastructures still apply the same legal frameworks and produce the same outcomes when they look.

The good news is that the right sequence is achievable. The bad news is that most families do not begin the work early enough or document it cleanly enough, and the consequences surface later.