Moving to Austin or Henderson doesn’t end a California tax problem. It usually starts one. The Franchise Tax Board finds most of its residency cases the simplest way possible: someone files a part-year or nonresident return, Form 540NR, the year they leave, and the year of a big sale or bonus is almost always the same year. For a business owner in Riverside or San Bernardino County who sells a company after relocating, the difference between winning and losing that audit can run well into six or seven figures, and Texas and Nevada won’t give a credit for any of it because neither state taxes individual income.
The good news is that residency cases are won or lost on facts the taxpayer controls, most of them before the move is even finished. The bad news is that the FTB auditor will reconstruct those facts from bank records and credit card swipes whether the taxpayer kept a diary or not.
Who counts as a California resident?
Under Revenue and Taxation Code § 17014, a resident is anyone in California for other than a temporary or transitory purpose, and anyone domiciled here who is away only for a temporary or transitory purpose. Those two tests do different work. Domicile is the one true, fixed, permanent home a person intends to return to, and a person can have only one. Residence turns on presence. The Court of Appeal made that distinction concrete in Whittell v. Franchise Tax Board (1964) 231 Cal.App.2d 278, holding a Nevada-domiciled couple taxable as California residents because they spent most of each year at their Lake Tahoe estate.
The regulation behind the statute, Cal. Code Regs., tit. 18, § 17014, tells auditors to find the state with which the person had the closest connection during the year. Two statutory rules sit on top of that. Section 17016 presumes anyone who spends more than nine months of the year here is a resident. Section 17014(d) offers a safe harbor for a domiciliary who leaves under an employment-related contract for at least 546 consecutive days, but it’s narrow: it disappears if intangible income tops $200,000 in any year of the contract or if the main purpose of the absence is avoiding tax, and it does nothing for an owner who simply decides to relocate.
How does the FTB actually run a residency audit?
The FTB’s Residency and Sourcing Technical Manual is public, and it reads like a playbook. The audit opens with a contact letter and a series of Information Document Requests, each with a 30-day response date. Auditors then build a physical presence calendar from credit card statements, bank records, airline tickets, and the locations where checks were processed. When records are slow to arrive, the manual describes getting them from the bank with a signed authorization.
The factors come from the Board of Equalization’s 2003 decision in Appeal of Bragg: where the family lives and the kids go to school, the size and value of homes in each state, whether a homeowner’s exemption is still claimed, where the doctors and dentists are, club memberships, vehicle registration, driver’s license, voter registration, business interests, and professional licenses. The Office of Tax Appeals now groups them into three buckets, following Appeal of Mazer, 2020-OTA-263P: physical presence and property, personal and professional associations, and registrations and filings. That third bucket carries the least weight. A Texas driver’s license obtained in week one is expected; it proves very little if the family still sleeps in Corona most weekends.
Why do people with Texas licenses and Nevada addresses still lose?
Because the move was a paperwork move. Appeal of Bracamonte, 2021-OTA-156P, is the case every Inland Empire seller should read. The owners of an aviation services company rented a Henderson apartment, registered to vote in Nevada, got Nevada licenses, and opened Nevada bank accounts in early 2008. They also kept their large California home with its furnishings and spent far more days in California than Nevada before their company sale closed that July. OTA sustained a 2008 assessment of $1,592,648 and repeated the rule that makes these cases hard: the FTB’s residency determination is presumed correct, and when domicile is in doubt, it’s found not to have changed.
In Noble v. Franchise Tax Board (2004) 118 Cal.App.4th 560, a couple claimed Colorado residency from March 1 but sold securities later that month while still living here, and they lost. Appeal of Beckwith, 2022-OTA-332P, shows the reverse trap: a man who had really moved to Tennessee bought a California home years later, spent about 170 days here, and was a resident again when his shares were exchanged.
Received an FTB residency questionnaire, Information Document Request, or Notice of Proposed Assessment? The first written response frames the whole audit. Talk it through with an attorney and CPA before you send it.
What income can California still tax after a genuine move?
Winning on residency isn’t the end of the analysis, because nonresidents still owe California tax on California-source income, and the sourcing rules are where business owners get surprised. Section 17952 sources gain on stock and other intangibles to the seller’s state of residence, so a true Texas resident who sells S corporation stock generally owes California nothing on that gain. Change the deal structure and the answer flips. Under Regulation 17951-4, a nonresident shareholder’s share of income from a business run entirely in California is California-source, and the FTB’s manual applies that to goodwill gain that flows through when the company sells its assets or the buyer insists on a deemed asset sale election. For a Fontana trucking company or a Temecula medical practice, that can put the whole gain back on a California return.
Timing matters too. Regulation 17952(d) fixes the source of an installment sale when the sale happens, so a note signed while the seller was a Californian keeps producing California-source gain on every payment after the move, though the interest isn’t California-source. Retirement income runs the other way: 4 U.S.C. § 114 bars states from taxing nonresidents on qualified plan, IRA, and similar distributions, while nonqualified deferred compensation is protected only if it’s paid in substantially equal periodic payments over at least ten years or life, or under certain excess benefit plans.
What does the math look like for an Inland Empire business owner?
Take a married couple who own all of a California S corporation in Corona that operates only in California. They move to Austin on July 1, 2025, buy a house, enroll their children in Texas schools, and switch licenses and voter registration. They keep the Corona house furnished, and the husband flies back roughly eight days a month to manage the transition. On March 15, 2026, they sell their stock for $8.5 million with a $1 million basis, a $7.5 million gain.
If the Texas domicile holds up, California taxes none of that gain, though they still file a 540NR for the company’s California income from January 1 through the closing. If the FTB proves they were still residents on March 15, the gain is fully taxable. Using the 2025 joint rate schedule as a stand-in, since the 2026 schedule isn’t out, the regular tax on $7.5 million of taxable income is about $884,000, and the 1% surcharge on income above $1 million under § 17043 adds $65,000, for roughly $949,000 before interest. If the buyer had required a § 338(h)(10) election, winning on residency might not help much: the goodwill gain from a California-only business would generally be California-source, the company itself would owe California’s 1.5% S corporation tax on the deemed sale, and the gain would be measured from the company’s asset basis rather than the owners’ $1 million stock basis. The furnished house and the monthly trips are exactly what cost taxpayers in Bracamonte.
| Income received after a move out of state | California tax? | Authority |
|---|---|---|
| Gain on sale of S corporation or C corporation stock | Generally no, if residency has truly changed by the sale date | RTC § 17952 |
| Flow-through gain from an asset sale or deemed asset sale of a California-only business | Generally yes | Reg. 17951-4; FTB RSTM |
| Installment payments on a sale signed while a resident | Yes on the gain portion; no on interest | Reg. 17952(d) |
| Payment for a covenant not to compete tied to the business sale | Apportioned using the sold business’s California factors | Reg. 17951-6 |
| IRA, 401(k), and pension distributions | No | 4 U.S.C. § 114; RTC § 17952.5 |
| Rent from the California house kept after the move | Yes | RTC § 17951 |
| Nonstatutory stock options granted while working in California | Partly, by California workdays from grant to exercise | Appeal of Stabile, 2020-OTA-198P |
How long can the FTB come back, and what happens if you don’t file?
The general assessment period is four years from filing under § 19057, extended to six years when more than 25% of gross income is omitted. Someone who files nothing gets no clock at all. Section 19087 lets the FTB estimate income and assess at any time, and a late-filing penalty of up to 25% can follow under § 19131. That’s why skipping the part-year return to avoid attention is almost always the wrong call. A filed 540NR that discloses the move and reports California-source income starts the statute running. If an audit does produce a Notice of Proposed Assessment, the protest deadline is 60 days under § 19041, and an appeal to the Office of Tax Appeals must follow within 30 days of the Notice of Action. At OTA, the taxpayer carries the burden of proof by a preponderance of the evidence.
What should a Californian do before and after moving?
Sign the sale documents after the move is real, and don’t let the closing land while the family still lives in the old house. Sell or lease the California home to an unrelated tenant if the numbers work; if you keep it, cancel the homeowner’s exemption. Move what you actually care about, from the doctors to the dog. Keep a day log from the first week along with the receipts behind it, because the auditor’s calendar will come from the same card statements. The FTB’s Publication 1031 is a useful checklist.
One more date to watch this year: Proposition 40 on the November 3, 2026 ballot would impose a one-time tax on billionaires who were California residents on January 1, 2026, according to the Legislative Analyst’s Office. If it’s approved, that measure would lean on the same § 17014 residency rules discussed here, and it would make the January 1 date the most scrutinized day of the year for a small group of taxpayers.
Frequently Asked Questions
Does spending fewer than 183 days in California make me a nonresident?
No. California has no 183-day safe harbor. Section 17016 presumes residency after nine months, but people present far fewer days have been held residents when their closest connections stayed in California.
Is getting a Texas or Nevada driver’s license enough to change my residency?
No. Licenses, voter registration, and addresses are the weakest category of evidence. The FTB and OTA look first at where you live, where your family is, and where your property and business ties are.
If I move before selling my company, will California tax the gain?
It depends on the deal. A stock sale after a genuine move is generally sourced to your new state. Flow-through gain from an asset sale or deemed asset sale of a business operating in California is generally still California-source.
Can California tax my 401(k) or pension after I leave?
No. Federal law, 4 U.S.C. § 114, prohibits states from taxing nonresidents on qualified retirement income. Nonqualified deferred compensation is protected only in limited circumstances.
How far back can the FTB audit my residency?
Usually four years from when you filed, or six years if you left out more than 25% of gross income. If you didn’t file a California return for the year in question, there’s no time limit.
What is the deadline to protest an FTB Notice of Proposed Assessment?
You have 60 days from the date of the notice to file a written protest. After the FTB issues a Notice of Action, you have 30 days to appeal to the Office of Tax Appeals.
How North Star Law Firm Can Help
North Star Law Firm represents Californians and former Californians in FTB residency audits, protests, and Office of Tax Appeals cases, and it helps owners plan a move and a business sale in the right order before the FTB gets involved. Phillip Zagotti is a California attorney and a CPA, so the presence calendars, sourcing schedules, and 540NR reporting that decide these cases are handled by the same person making the legal arguments. Learn more about the firm’s California tax defense practice, its work on structuring a business sale, and its Office of Tax Appeals representation. If a residency letter has already arrived, the firm can help you schedule a consultation and prepare the response.