California exit tax: what's real and what's not

There is no enacted California exit tax

Search "California exit tax" and you'll find years of alarmed headlines, but as of this writing California has not enacted a tax that applies specifically to people who leave the state. What exists is a pattern: periodically, state legislators introduce wealth-tax bills that would apply to high-net-worth residents, and some versions include a provision that would continue to tax former residents for a period of years after they move. None of these have been signed into law so far.

The two most-cited examples are AB 2088 (2020) and AB 259 (2023), both wealth-tax proposals that included multi-year 'exit' provisions reaching people who had recently left California. Both generated significant coverage and both stalled without becoming law. That doesn't mean a future version couldn't pass — only that none has yet, and the actual tax exposure people face when leaving California today comes from ordinary residency and sourcing rules, not a standalone exit tax.

Residency and domicile are the real battleground

California taxes people, not addresses. A California resident is taxed on all income from any source, anywhere in the world. A nonresident is taxed only on California-source income. So the question that decides almost everything is: are you still a California resident after you move?

California uses two overlapping concepts. Domicile is your true, fixed, permanent home — the place you intend to return to, even if you're temporarily elsewhere. Residency is a facts-and-circumstances test that looks at where you actually spend time and maintain your life. You can change your domicile and still be treated as a resident if California determines your presence elsewhere is temporary, or you can be domiciled elsewhere and still owe tax as a statutory resident if you spend enough time in California in a given year.

Closest-connection factors

When the FTB evaluates whether someone actually left, it looks at where your life's connections point, not just where your driver's license is from. Common factors include:

• Location of your spouse and children, and where kids attend school
• Where you own or rent your primary home, and whether you kept a California property available for your use
• Where your doctors, dentists, accountants, and other professionals are
• State of vehicle registration and driver's license
• Voter registration and where you actually vote
• Location of banks, safe deposit boxes, and where you keep valuable or sentimental belongings (sometimes called the 'near and dear' items test)
• Where you are physically present for the most days in a year
• Business ties, professional licenses, and club or religious memberships

No single factor controls. The FTB weighs the whole picture, which is why a residency change is a pattern you build over months, not a single filing. See Changing your residency the right way for the practical checklist.

The nine-month presumption and day counts

California law includes a presumption that if you spend more than nine months of the taxable year in California, you are presumed to be a resident. It's a rebuttable presumption, meaning you can present facts to overcome it, but it shifts the starting point against you. There's a related, less protective presumption for people who spend limited time in California but are domiciled elsewhere and claim nonresident status while working temporarily outside the state.

Practically, this means day counts matter in both directions: too many days in California after your claimed move date undermines your position, and keeping a log (flights, credit card statements, phone location data, calendar) is cheap insurance if you're ever audited.

Filing the year you move: part-year returns

The year you actually move, you'll typically file as a part-year resident, reporting worldwide income for the portion of the year you were a California resident and California-source income only for the part-year you were a nonresident. This is commonly done on Form 540NR, with supporting schedules allocating income by date and source.

Get the mechanics wrong and you can end up paying California tax on income that was actually earned after you left, or conversely draw audit attention by looking like you under-allocated income to the period you were still a resident. A part-year return is usually the single highest-stakes tax filing in the relocation process, and it's worth having a CPA familiar with California nonresident rules prepare or review it.

California-source income that can follow you after you leave

Even with a clean residency change, certain income stays taxable to California because of where it was earned or sourced, not where you live when you receive it. This is the part people most often miss.

Consider a hypothetical software engineer who leaves California for Texas mid-year, carrying unvested RSUs that continue vesting for two more years. A portion of each future vest, roughly matching the fraction of the vesting period spent working while physically in California, can remain California-source income and show up on a nonresident return years after the move — even though the employee hasn't lived in California since the move.

A closer look: equity compensation after you leave

Because equity compensation is so common among people leaving California for other tech hubs, it deserves its own walkthrough. The FTB generally sources stock option and RSU income using a workday allocation: the number of days worked in California during the relevant period, divided by total days worked during that period, applied to the income recognized at vest or exercise.

That means the location where you're living on the vest date is not the main question. What matters is where you physically worked during the vesting period. If you worked in California for three years of a four-year vest and then moved out of state for the final year, a large share of the eventual payout is still likely to be treated as California-source income. Employers often issue a California nonresident withholding on the California-sourced portion automatically, but it's worth confirming with payroll and a tax preparer rather than assuming.

FTB residency audits: what triggers them, what they look at

California residency audits tend to focus on higher earners, people with large one-time income events (an equity payout, a business sale, a large capital gain), and people who continue to spend significant time in California after claiming nonresident status. The FTB has broad authority to request records and can look back several years.

An audit typically asks for exactly the closest-connection evidence described above: credit card and bank statements, phone records or location data, utility bills, travel records, lease or deed documents, and sometimes social media activity. The taxpayer carries the burden of proving nonresidency, which is a meaningfully different posture than most federal tax disputes.

Why timing a large income event around your move is risky

If you sell a business, exercise a large block of options, or trigger another big income event in the same year you move, expect extra scrutiny of exactly when your residency actually changed. The closer a major taxable event sits to your claimed move date, the more carefully the FTB may examine whether the move was genuine and complete by that date.

How to document a clean break

None of this is about any one document — it's about consistency across many small facts, ideally starting before the move and continuing for at least a year after. Useful steps include:

• Pick and record a clear move date, and keep the signed lease, closing documents, or mover's contract that proves it
• Update driver's license, vehicle registration, and voter registration in the new state promptly, and cancel or let the California versions lapse
• Move your primary bank accounts, mail, and safe deposit box
• Sell or rent out (don't keep sitting empty and 'available') any California home; if you must keep one, understand it can work against you in a residency audit
• Register with doctors, dentists, and other professionals in the new state
• Keep a simple travel log for the first year or two after the move
• File a timely part-year resident return for the transition year and nonresident returns afterward if you still have California-source income

For the full step-by-step checklist with a timeline, see Changing your residency the right way. If you still own or are selling California real estate as part of the move, also see Selling your California home, since withholding rules apply at closing for sellers who are or may become nonresidents.

Planning around income events and business ties

If you run a business, hold significant equity, or expect a large liquidity event, talk to a CPA or tax attorney who handles California nonresident and part-year issues well before you move — ideally before you finalize a sale date, exercise options, or restructure a business. The sequencing of a move relative to a taxable event often matters more than any other single decision. If your business itself is relocating or you're untangling California nexus, see Moving your business out of California for the operational side.

For remote employees keeping a California employer while living elsewhere, the sourcing rules work differently for wages than for equity — see Jobs, remote work and income for how ongoing W-2 pay is treated once you're a documented nonresident.

Start by mapping your move on the California exit planner, which walks through the sequence of steps — including the tax and residency pieces — in the order most people actually need them.