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Short answer: California has no enacted, general annual wealth tax. The state does tax residents on income from all sources, and it taxes capital gains as ordinary income rather than giving long-term gains a lower state rate. A proposed one-time billionaire tax, Proposition 40, was scheduled for the November 3, 2026 ballot; it is not current tax law. Your California residency status, the asset’s location and type, and when a gain is realized determine whether California can tax it.
What California taxes now—and what is only proposed
California’s current individual tax system is an income-tax system. A California resident generally reports worldwide income, including wages, business income, interest, dividends and capital gains. California does not currently impose a broad annual tax on a person’s net worth. The California Franchise Tax Board (FTB) explains the resident rules at Residents.
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| Measure or rule | What it would or does do | Status as of October 13, 2026 |
|---|---|---|
| Current California income-tax rules | Residents are generally taxed on income regardless of source. Nonresidents remain taxable on California-source income. | In effect |
| Proposition 40 (2026 Billionaire Tax Act) | Proposes a one-time tax equal to 5% of net worth for billionaires who were California residents on January 1, 2026, according to the Legislative Analyst’s description. | Ballot proposal; voters had not yet decided. Election date: November 3, 2026. |
| Proposition 42 | Proposes prohibiting certain new state taxes on ownership or control of personal property and certain taxes applied retroactively to earlier conduct, activities or status. | Separate ballot proposal; effect on Proposition 40 is unresolved. |
Read the official Proposition 40 voter information and the Legislative Analyst’s Proposition 40 analysis for the proposal’s text and fiscal description. The Secretary of State’s Proposition 42 guide describes the competing measure. Neither measure should be reported as enacted before the election, and a general summary cannot predict how courts would resolve any conflict if both passed.
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Residency is not settled by a universal 183-day test. The FTB uses a facts-and-circumstances approach centered on domicile and the purpose of your presence in, or absence from, California. Its published formulation is:
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“You’re a resident if either apply: Present in California for other than a temporary or transitory purpose; Domiciled in California, but outside California for a temporary or transitory purpose.”
The full FTB explanation appears on its resident guidance page. A person can have a California domicile even while physically away if the absence is temporary or transitory. Conversely, someone who spends substantial time in California for a settled purpose may be treated as a resident even without meeting a simple day-count rule.
Domicile and temporary or transitory purpose
Domicile is the place you consider your permanent home and to which you intend to return. In a close case, the FTB weighs the overall pattern rather than one document or one number of days. Relevant facts can include where your principal home and spouse or dependents are located, where you work, where children attend school, the location of business and professional ties, driver’s-license and voter-registration records, vehicle registration, and where you maintain social and financial connections. No single item automatically determines the result.
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Temporary travel, a short assignment, or an extended stay elsewhere does not necessarily end California residency. Establishing a new home, moving employment and family, changing registrations, and showing that the former California connection has been relinquished can matter, but the legal conclusion remains fact-specific.
The narrow employment safe harbor
FTB Publication 1031 describes a limited safe harbor for certain people domiciled in California who leave under an employment-related contract. In the 2024 edition surfaced by the FTB, the absence must be uninterrupted for at least 546 consecutive days. The publication also describes exceptions, including more than $200,000 of intangible income in a covered tax year, an absence whose principal purpose is avoiding personal income tax, and limits on California return visits. Those figures and conditions come from the 2024 edition of Publication 1031; verify the current edition before relying on them. This is not a blanket rule that anyone who works outside California for 546 days becomes a nonresident.
What to document when your status is disputed
- A dated timeline of moves, travel and work assignments.
- Lease, purchase, sale and utility records for each home.
- Employment contracts and the business purpose of an absence.
- Family location, school records and community ties.
- Driver’s-license, voter-registration, vehicle and professional-license changes.
- Bank, insurance and mailing-address records showing where you maintained your permanent base.
These records help explain the facts; they do not replace an individualized residency analysis. The FTB directs taxpayers to Publication 1031 for more detail.
How income is divided for residents, part-year residents and nonresidents
Your filing period and source of income work together. The FTB’s part-year resident and nonresident guidance describes the basic framework:
| Status | General California tax reach | Typical reporting question |
|---|---|---|
| Full-year resident | Worldwide income for the year, subject to California’s adjustments and exemptions. | Report income even if paid by an out-of-state payer or earned from property outside California. |
| Part-year resident | Worldwide income received during the resident period, plus California-source income during the nonresident period. | Identify the move date and allocate each item to the correct period and source. |
| Nonresident | California-source income, not generally all worldwide income. | Determine whether the income arises from California work, property or another California source. |
The table is a general framework, not a substitute for the return instructions. A move during the year requires separating resident-period and nonresident-period income, and specialized sourcing rules can change the result for particular transactions.
How California treats capital gains
California does not give capital gains a separate, lower state rate. The FTB states on its capital gains and losses page, last updated January 28, 2026:
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“California does not have a lower rate for capital gains. All capital gains are taxed as ordinary income.”
This is California treatment; it is not the same as federal long-term capital-gains rate rules. California’s Schedule D adjustments may be required when federal and state calculations differ. The state still requires taxpayers to report gains and losses from capital assets, and the character and source of the asset remain important.
Why the asset and transaction matter after a move
Changing your address does not automatically remove California’s taxing jurisdiction. FTB Publication 1100, Nonresidents and residency changes, revised October 2024, describes sourcing examples and deferred transactions.
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- California real or tangible personal property: Gains from a sale or exchange of property physically located in California are generally California-source when the gain is realized, even if you are a nonresident at that point.
- Intangible property: Stock and other intangible assets require analysis of residency, the nature of the income and the timing of receipt. Publication 1100 describes situations in which installment proceeds from intangible property received while the seller is a California resident are taxable.
- Installment sales: The date each payment is received can matter, so a move between the sale and later payments does not necessarily end California reporting.
- Deferred exchanges: A like-kind exchange involving California property can carry continuing California reporting obligations even when replacement property is outside the state.
Do not reduce every move-related question to “Where did I live on closing day?” The relevant comparison is the residency at the time income is recognized or received, the property’s location and character, and whether a deferral rule applies.
Common move scenarios
| Scenario | Issue to analyze |
|---|---|
| You remain a California resident and sell shares of an out-of-state company. | Worldwide-income rules generally bring the gain into the California return; California still taxes the gain as ordinary income. |
| You establish nonresidency before selling investment securities. | Review the exact residency date, the asset’s intangible character, and any installment or deferred arrangement; a move alone is not conclusive. |
| You sell California real estate after moving away. | The property remains California-situs real property, so the gain is generally California-source when realized. |
| You receive installment payments after leaving. | Determine whether the payments represent California-source income or income received during a California-resident period under the applicable sourcing rules. |
| You exchange California property for out-of-state replacement property. | Check continuing California reporting and deferred-gain rules rather than assuming the exchange ends California obligations. |
Federal conformity can create a second calculation
California generally conforms to the Internal Revenue Code but makes specific modifications. The FTB’s conformity page, last updated January 20, 2026, says SB 711, enacted October 1, 2025, moved the specified conformity date from January 1, 2015 to January 1, 2025. That date does not create a California preferential capital-gains rate. It means that federal changes and California modifications must still be reconciled.
The 2025 California Schedule D instructions warn that federal and California treatment can differ and that the instructions summarize law rather than provide an exhaustive authoritative account. Keep the federal calculation, identify every California adjustment, and use the current California forms and instructions for the filing year.
A practical process for a move or large gain
- Set the relevant dates. Record when you left or entered California, when domicile changed, when the sale became binding or the gain was realized, and when each installment payment was received.
- Classify your status for each period. Apply the FTB’s domicile and temporary-or-transitory standards. Do not rely on a day count alone. If you are using the employment safe harbor, verify the current Publication 1031 and every condition.
- Classify the asset. Note whether it is California real property, tangible personal property, stock or another intangible, and whether the transaction is an installment sale or deferred exchange.
- Allocate the income. Full-year residents generally include worldwide income; part-year residents split worldwide resident-period income from California-source nonresident-period income; nonresidents report California-source items.
- Reconcile federal and California figures. Review Schedule D and any California-specific adjustments instead of copying the federal capital-gain number without checking conformity differences.
- Retain support. Keep purchase basis, improvements, closing statements, exchange documents, payment schedules, travel records and residency evidence for the period required by applicable law.
- Escalate unusual facts. A high-value move, closely held business, trust, deferred exchange, multiple homes or disputed domicile can require advice from a qualified California tax professional.
What the 2026 ballot date means for taxpayers
As of October 13, 2026, Proposition 40 remained a proposal scheduled for November 3, 2026. The Legislative Analyst describes a one-time 5% tax on the net worth of specified billionaires who were California residents on January 1, 2026. That is a proposed eligibility date and proposed rate, not a current annual wealth-tax obligation. The proposal’s text, implementation details and any legal challenges should be reviewed after the election before drawing conclusions about an individual’s liability.
Proposition 42 is a separate proposal concerning certain new taxes on personal-property ownership or control and certain retroactive taxes. Its official description does not establish how it would apply to Proposition 40, and this article does not predict which measure would control if both were approved. Ballot results and post-election tax guidance must be checked before making planning decisions.
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