State Residency Guide
California Residency
California runs nine brackets from 1% to 12.3%, plus a 1% Mental Health Services Tax on taxable income over $1 million, making the effective top marginal rate 13.3%. Since 2024, the wage cap on State Disability Insurance withholding was removed, so high earners also pay an uncapped 1.1% payroll tax on top of income tax.
Top Income Tax Rate
13.3%
Audit Aggressiveness
Very high (5/5)
Residency Tests
Statutory Residency Test
California does not use a bright-line day count as its primary test. Under Revenue and Taxation Code §17014 and FTB Publication 1031, a resident is anyone present in California for other than a temporary or transitory purpose, or anyone domiciled in California who is outside the state for a temporary or transitory purpose. It is a facts-and-circumstances closest-connections test, not a day-count test.
Domicile Test
FTB Publication 1031 defines domicile as the place you have your true, fixed, permanent home and to which you intend to return whenever absent. FTB weighs nine factors: where your spouse and children live, where your principal residence is, where your driver's license and vehicles are registered, where you're registered to vote, the location of your banks and professional relationships (doctor, dentist, accountant, attorney), the state on your last income tax return, and your permanent employment location. No single factor controls, but family location and principal home carry the most practical weight.
Day Count Threshold
No fixed statutory threshold; a facts-and-circumstances test applies instead.
Any Part of a Day Rule
Yes. FTB counts any presence in California, even a few hours, as a full day when it applies the nine-month presumption or the closest-connections analysis. There is no minimum-hours carve-out for ordinary travel; FTB guidance recognizes only narrow exceptions such as medical emergencies stranding someone in-state.
Presumptions
Revenue and Taxation Code §17016: an individual present in California for more than nine months (roughly 274 days) of the tax year is presumed a resident, rebuttable with evidence the presence was temporary or transitory. There is no symmetrical safe presumption for spending fewer than nine months; FTB can still find residency based on closest connections even at low day counts.
Safe Harbors
546-day overseas/out-of-state employment contract safe harbor
A person domiciled in California who is absent from the state for an uninterrupted period of at least 546 consecutive days (about 18 months) under an employment-related contract is treated as a nonresident for that period, provided they don't maintain a permanent place of abode in California and don't spend more than 45 days in California in any taxable year covered by the contract (return visits up to 45 days per year are disregarded). It does not apply to self-employed people contracting with their own entity, and it fails entirely if the abode condition is violated.
R&TC §17014(d)
Free Tools for California
Leaving California
California is the state practitioners and community forums most consistently describe as the toughest to leave. FTB residency audits concentrate on high earners whose departure date lines up with a liquidity event, business sale, or large stock vesting; a claimed move date of late December followed by a January capital gain is a classic trigger. For filed part-year or nonresident returns, FTB has four years to assess. If no California return was ever filed for a year FTB believes you were a resident, there is no statute of limitations at all (R&TC §19057(a)), which is what makes silent nonfilers, not honest part-year filers, FTB's highest-risk targets.
Trailing Income
Compensatory stock options and other equity comp earned while you were a California resident retain California source: FTB apportions the income using the ratio of California workdays to total workdays during the vesting period, applied at exercise or vesting regardless of where you live by then. Nonqualified deferred comp earned in California generally keeps its California-source character on distribution, subject to the federal 4 U.S.C. §114 limits that reserve taxation to the state of residence at time of receipt for true retirement-plan-style periodic payments. Income from a California business or from California real property continues to be taxed to nonresidents indefinitely.
Part-Year Filing
Form 540NR, California Nonresident or Part-Year Resident Income Tax Return. FTB discontinued the short-form 540NR Short for tax years starting in 2019, so all part-year and nonresident filers now use the long form.
Enforcement Methods
Common Exit Mistakes
Establishing California Residency
| Action | Agency | Deadline |
|---|---|---|
| Get a California driver's license | DMV | within 10 days of becoming a resident (Vehicle Code §12951) |
| Register vehicles in California | DMV | within 20 days of becoming a resident |
| Register to vote | California Secretary of State | 15 days before an election; same-day conditional registration available after that |
Declaration of Domicile
California has no formal declaration-of-domicile filing comparable to Florida. Domicile is established purely through conduct and intent, judged against FTB Publication 1031's nine factors.
Homestead
California's homeowners' exemption (a modest $7,000 assessed-value reduction on property tax) is automatic on a primary residence, no filing needed. Separately, a declared homestead recorded with the county recorder protects home equity from creditors; under the exemption law updated by AB 1885, the protected amount floats with county median home price, subject to a statutory floor and cap adjusted annually. Filing a declared homestead in a new state (or recording one in California) is exactly the kind of document FTB and other states' agencies cross-check against voter files and driver's license addresses during a residency dispute.
Voter Registration
Register at least 15 days before an election; conditional same-day registration is available at county elections offices and some DMV locations after that. https://www.sos.ca.gov/elections/voter-registration
Vehicle Registration Deadline
20 days
New Resident Tax Traps
California taxes a new resident's worldwide income starting the day residency begins, with no phase-in period the way some countries offer. New residents who bring a vehicle, boat, or aircraft into California within 12 months of buying it out of state may owe California use tax if they didn't already pay an equivalent sales tax. Part-year residents must source all income earned after their residency start date to California regardless of where the work was performed.
Tax Profile
Capital Gains
Taxed as ordinary income at the same rates as wages, with no preferential long-term rate. A $50,000 long-term gain is taxed identically to $50,000 of salary.
Retirement Income
Social Security is exempt. Pensions, 401(k) and IRA distributions are fully taxed as ordinary income once you are a California resident receiving them.
Estate or Inheritance Tax
None. California repealed its estate tax in 1982 and has no inheritance tax. The federal estate tax still applies above the federal exemption.
Property Tax
Effective rate runs roughly 0.7-1.3% depending on when the property was purchased. Proposition 13 caps the base rate at 1% of assessed value with a 2% annual increase cap; Proposition 19 lets homeowners 55+, disabled owners, or wildfire/disaster victims transfer their low assessed value to a new California home up to three times.
Sales Tax
7.25% state base rate (highest state-level rate in the US), averaging about 8.68% combined with local district taxes.
Community Property
California is a community property state.
Special Situations
Travel Nurses
California is both a major origin state, since many nurses domiciled here take travel contracts elsewhere, and the single highest-paying destination state for travel assignments. A nurse's tax home must be a genuine, regularly-returned-to residence with duplicated living expenses; nurses who claim a tax home in Texas or Florida but never actually go back risk having the FTB or IRS reclassify housing stipends as taxable wages if the facts show California, not the claimed state, is really home. A nurse domiciled outside California who works a temporary California assignment as a W-2 traveler does not become a California resident from that assignment alone, but the wages earned during the California contract are still California-source and must be reported on a nonresident Form 540NR.
Professional Athletes
California is the most aggressive jock-tax state. FTB counts not just game days but practices, walkthroughs, and even voluntary workouts held at a California team facility during game week, which can turn one road game into three or four California duty days. With the Lakers, Clippers, Warriors, Kings, 49ers, Rams, Chargers, Dodgers, Giants, Padres, and Athletics all based here, nonresident athletes playing any California team face California nonresident tax on their duty-day-apportioned income, while California-domiciled athletes owe California tax on their full worldwide income.
Remote Workers
California has no convenience-of-employer rule like New York's. A nonresident who physically performs all their work outside California for a California-headquartered employer is not California-taxed on those wages solely because the employer is based here. The trigger is the employee's own residency and physical work location, not the employer's address. A California resident, however, owes California tax on remote wages regardless of where the employer sits.
Military
California follows the federal Servicemembers Civil Relief Act and the Military Spouses Residency Relief Act. Active-duty military domiciled outside California but stationed here under orders are not California residents and their military pay isn't California-taxed. Under MSRRA and the Veterans Benefits and Transition Act, a nonmilitary spouse can elect the servicemember's domicile for state tax purposes instead of being pulled into California residency by physical presence alone.
Students
A student attending a California university is presumed to retain the domicile they arrived with unless they take independent, affirmative steps to become a California domiciliary: financial independence from out-of-state parents, a California driver's license, California voter registration, and intent to remain after graduation. This income-tax domicile question is separate from a public university's own in-state tuition residency rules, which have their own one-year physical presence and intent requirements.
Snowbirds and Long Visitors
The nine-month presumption under §17016 only creates a rebuttable presumption of residency past that point; it does not create a safe harbor below it. Spending fewer than nine months in California does not guarantee nonresidency; FTB still applies the closest-connections test. This is the classic dual-home audit target described across Bogleheads and r/tax threads: a retiree who keeps the California house, splits time with a Nevada or Arizona property, but leaves a spouse, kids, doctors, or the majority of actual annual days in California.
Airline Crew
Federal law (49 U.S.C. §40116) limits taxation of air carrier employees to their state of residence and any state where they earn more than 50% of their pay, overriding ordinary duty-day sourcing. California hosts major crew bases at LAX and SFO, so this carve-out matters heavily for California-based flight crew who fly national or international routes.
Retirees
Retirees leave California overwhelmingly because of the 13.3% top rate applying in full to pension, 401(k), and IRA withdrawals, since only Social Security is exempt. Those who stay do so for family, climate, and healthcare access, and because California's lack of an estate tax means the departure decision is driven by ongoing income tax, not a one-time exit levy.
Audit Profile
Statute of Limitations
4 years from the filing date for a filed return; unlimited if no return was ever filed for a year FTB believes you owed tax as a resident (R&TC §19057(a)).
Typical Lookback
Practitioners report FTB residency audits typically open with the year of the claimed move and pull in the following one to two years of returns, extending further back or forward when a major liquidity event anchors the dispute.
Defense Cost Range
No official published figures. Tax attorneys and CPAs who handle California residency audits informally cite roughly $15,000 to $75,000 or more to defend a contested case through the administrative process, with costs climbing sharply if the dispute proceeds to the Office of Tax Appeals.
Known Cases
Appeal of Bragg
Stephen Bragg claimed to have moved his domicile to Nevada and other locations but the State Board of Equalization found he retained his closest connections to California and had not carried his burden of proving a genuine domicile change; the decision is the source of the widely cited list of domicile factors California practitioners still call the Bragg factors.
2003-SBE-002
Leaving California
Moving to California
California Residency FAQ
Can I keep my house in California after moving to Nevada?+
Yes, but it is the single biggest risk factor in an FTB audit. Keeping the home furnished, available, and used on visits looks like you never gave up your permanent place of abode. If you keep the house, rent it out on a genuine arm's-length lease, move your spouse and dependents out with you, and make sure your actual annual day count and closest connections (driver's license, voter registration, doctors, banking) point to Nevada, not California.
Does California use the 183-day rule?+
No. California has no simple day-count threshold that by itself makes you a resident or nonresident. Instead it asks whether your closest connections, meaning family, home, and financial ties, point to California. You can spend fewer than 183 days in California and still be found a resident, or spend more and still be a nonresident if you can prove the presence was temporary or transitory.
How many days can I spend in California without becoming a resident again?+
There's no fixed safe number. Revenue and Taxation Code §17016 only creates a presumption of residency once you're present more than nine months (roughly 274 days); it doesn't protect you below that. FTB can still find you a resident at far fewer days if your spouse, kids, home, and financial life stayed centered in California.
What triggers a California residency audit?+
The most common triggers are a large capital gain or business sale reported shortly after a claimed move date, a part-year or nonresident return that still shows California-source income, a 1099 or K-1 sent to a California address after the move, and continued ownership of a California home combined with California driver's license or voter registration records.
How does the FTB find out I still have ties to California?+
FTB cross-references DMV vehicle and license records, the voter registration file, 1099/K-1 address data, and increasingly credit card geolocation and cell phone records. Homestead declarations filed in a new state get compared against continued California property ownership, and in high-dollar cases FTB has used private investigators and social media.
Can I still visit my parents in California without risking my residency?+
Ordinary visits are fine, but every hour in California counts as a full day toward FTB's nine-month presumption, and frequent, long, or pattern-like visits (same house, same routine) get weighed as evidence your closest connections never really left. Keep visits documented, reasonably short, and avoid using a California address for mail, banking, or medical care during them.
What happens to my stock options if I leave California before I exercise them?+
California still taxes the portion of the option income tied to the vesting period you worked in California, using a ratio of California workdays to total workdays during that period. Moving before exercising doesn't erase this; FTB applies the allocation at exercise regardless of your residency then.
Do I owe California tax if I run a Nevada LLC but still own a home in California?+
Possibly yes. An entity's state of formation doesn't determine your personal residency. If FTB's closest-connections analysis finds you're still domiciled in California, or that you spent significant time in the state, your worldwide income, including the LLC's pass-through income, can be taxed as a California resident regardless of where the business is legally organized.
How long does a California residency audit take?+
Practitioners commonly describe FTB residency audits running well over a year, often into the 18 to 24 month range once document requests, interviews, and appeals to the Office of Tax Appeals are factored in, especially for high-net-worth cases involving a business sale.
What is the FTB's nine-month presumption?+
Under Revenue and Taxation Code §17016, spending more than nine months (roughly 274 days) of the tax year in California creates a rebuttable presumption that you're a California resident. You can overcome it with evidence the presence was for a temporary or transitory purpose, but the burden of proof is on you, not the FTB.
Does California tax my retirement income before I officially leave?+
Yes. Until your California residency actually ends under the facts-and-circumstances test, all pension, 401(k), and IRA distributions are taxed as ordinary income at up to 13.3%. Only Social Security is exempt regardless of residency status.
California Reading
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ResidencyIQ organizes public residency research into a reviewable reference. It does not provide legal or tax advice. Consult a qualified professional before making a residency decision.
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