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  • State Residency Audits for HNWIs: CA & NY Domicile

    State Residency Audits for HNWIs: CA & NY Domicile

    Last Updated: October 5, 2026

    Next Scheduled Review: October 2027

    Key Takeaways

    • California defines a resident as any individual in the state for other than a temporary or transitory purpose, or domiciled in the state who is outside for a temporary or transitory purpose, under Cal. Rev. & Tax. Code § 17014(a) .
    • New York defines a statutory resident as a non-domiciliary who maintains a permanent place of abode in the state for substantially all of the taxable year and spends more than 183 days in the state, under N.Y. Tax Law § 605(b)(1)(B) .
    • California provides a safe harbor under Cal. Rev. & Tax. Code § 17014(d) for individuals domiciled in California who are absent from the state for an uninterrupted period of at least 546 consecutive days under an employment-related contract .
    • New York imposes a clear and convincing evidence burden on taxpayers asserting a change of domicile, and formal declarations such as voter registration carry less weight than acts and conduct, per Matter of Hoff and Ocorr-Hoff, DTA No. 850209 (N.Y.S. Tax Appeals Trib. Oct. 9, 2025) .
    • California residency determinations by the Franchise Tax Board (FTB) are presumptively correct, and the taxpayer bears the burden of proving error by a preponderance of the evidence under Cal. Code Regs. tit. 18, § 17014 .

    Direct answer: A state residency audit is an examination by the California Franchise Tax Board or the New York State Department of Taxation and Finance to determine whether a taxpayer is a resident or domiciliary of the state under Cal. Rev. & Tax. Code § 17014 or N.Y. Tax Law § 605(b)(1). High-net-worth individuals face heightened scrutiny because of the substantial revenue at stake.

    Cite This Article

    Goldstein, A. (2026). State Residency Audits for HNWIs: Resolving Domicile Challenges in California and New York. [Publication Name].

    Alan Goldstein, “State Residency Audits for HNWIs: Resolving Domicile Challenges in California and New York,” [Publication Name] (Oct. 5, 2026).

    Introduction

    California and New York impose the highest state income tax burdens in the United States on high-net-worth individuals. When an HNWI claims to have changed domicile to a lower-tax state, the California Franchise Tax Board (FTB) and the New York State Department of Taxation and Finance (NYS DTF) routinely initiate residency audits to challenge that claim. These audits require the taxpayer to produce documentary evidence spanning multiple years, including travel records, financial records, real estate documents, and testimony regarding subjective intent. The controlling authorities are state-specific: California operates under Cal. Rev. & Tax. Code § 17014 and Cal. Code Regs. tit. 18, § 17014, while New York operates under N.Y. Tax Law § 605(b)(1) and 20 NYCRR § 105.20. Federal constitutional limits under the Due Process and Commerce Clauses constrain state taxing authority, but the operative domicile and residency rules are creatures of state law.

    What Is a State Residency Audit?

    Direct answer: A state residency audit is a civil examination by the California Franchise Tax Board or the New York State Department of Taxation and Finance to verify whether a taxpayer is a resident or domiciliary of the state under Cal. Rev. & Tax. Code § 17014 or N.Y. Tax Law § 605(b)(1). These audits typically cover three to six tax years and require the taxpayer to prove a change of domicile by documentary evidence.

    Statutory Basis

    Direct answer: California’s residency statute, Cal. Rev. & Tax. Code § 17014(a), defines a resident as every individual in the state for other than a temporary or transitory purpose, or every individual domiciled in the state who is outside the state for a temporary or transitory purpose . New York’s statute, N.Y. Tax Law § 605(b)(1)(B), defines a statutory resident as one not domiciled in the state but who maintains a permanent place of abode and spends more than 183 days in the state .

    California’s definition is codified in Cal. Rev. & Tax. Code § 17014(a) and elaborated in Cal. Code Regs. tit. 18, § 17014. The regulation provides that an individual may be a resident although not domiciled in California, and conversely may be domiciled in California without being a resident . New York’s definition is codified in N.Y. Tax Law § 605(b)(1) and implemented through 20 NYCRR § 105.20. The regulation provides that domicile is the place which an individual intends to be such individual’s permanent home, and a domicile once established continues until the individual moves to a new location with the bona fide intention of making such individual’s fixed and permanent home there .

    Historical Development

    Direct answer: California’s residency rules date to the Personal Income Tax Law of 1935 and were refined through Cal. Code Regs. tit. 18, § 17014, adopted in 1955. New York’s statutory residency test was enacted in 1965 as part of the state’s personal income tax law and has been interpreted through over five decades of Tax Appeals Tribunal decisions.

    California’s Cal. Code Regs. tit. 18, § 17014 was adopted shortly after the personal income tax was enacted. The regulation’s “temporary or transitory purpose” test derives from Whittell v. Franchise Tax Bd., 24 Cal. 2d 474 (1944), in which the California Supreme Court held that domicile requires a concurrence of act and intent . New York’s statutory residency test was added to the Tax Law in 1965 to prevent tax evasion by New York residents who maintained abodes in the state while claiming nonresident status. The Court of Appeals in Matter of Gaied v. New York State Tax Appeals Trib., 22 N.Y.3d 592 (2014), explained that the legislative intent underlying Tax Law § 605 is to discourage tax evasion by residents of this state .

    Current Scope

    Direct answer: California applies three alternative residency tests under Cal. Rev. & Tax. Code § 17014: domicile, physical presence for other than a temporary or transitory purpose, and the 546-day safe harbor for employment-related absences. New York applies two tests under N.Y. Tax Law § 605(b)(1): domicile and statutory residency based on permanent place of abode plus more than 183 days.

    California’s three tests are defined in Cal. Rev. & Tax. Code § 17014(a) and (d). The FTB’s Residency & Sourcing Technical Manual confirms that the theory behind California residency law is to define the class of individuals who should contribute to the support of the state . New York’s two tests are defined in N.Y. Tax Law § 605(b)(1)(A) (domicile) and § 605(b)(1)(B) (statutory residency). A New York domiciliary may also escape resident treatment under the 30-day exception in 20 NYCRR § 105.20(b)(1) or the 548-day foreign country exception in § 105.20(b)(2) .

    Entity Reference Table

    EntityFull NameTypeBinding EffectRole in This Article
    FTBCalifornia Franchise Tax BoardState administrative agencyBinds California taxpayers; persuasive in CA courtsAudits and determines California residency
    NYS DTFNew York State Department of Taxation and FinanceState administrative agencyBinds New York taxpayers; persuasive in NY courtsAudits and determines New York residency
    CA OTACalifornia Office of Tax AppealsState tribunalBinds FTB on remand; persuasive in CA courtsHears California tax appeals
    NY DTANew York State Division of Tax AppealsState tribunalBinds NYS DTF on remand; persuasive in NY courtsHears New York tax appeals
    NY Tax Appeals TribunalNew York State Tax Appeals TribunalState appellate tribunalBinds NYS DTF and NY DTA; persuasive in NY courtsReviews NY DTA decisions
    U.S. ConstitutionUnited States ConstitutionFederal constitutional authorityBinds all state taxing authoritiesLimits state taxation under Due Process and Commerce Clauses

    Binding Effect and Legal Weight

    Direct answer: State statutes such as Cal. Rev. & Tax. Code § 17014 and N.Y. Tax Law § 605(b)(1) are primary authority binding on taxpayers and state agencies. State regulations such as Cal. Code Regs. tit. 18, § 17014 and 20 NYCRR § 105.20 are primary authority binding on the agencies that issued them but subject to judicial review. Tribunal decisions are binding on the agencies but persuasive only in state courts.

    Who Is Bound

    Direct answer: California statutes and regulations bind the FTB and all California taxpayers. New York statutes and regulations bind the NYS DTF and all New York taxpayers. FTB determinations are presumptively correct, and California taxpayers bear the burden of proving error by a preponderance of the evidence . New York taxpayers asserting a change of domicile bear a clear and convincing evidence burden under Matter of Hoff and Ocorr-Hoff, DTA No. 850209 (N.Y.S. Tax Appeals Trib. Oct. 9, 2025) .

    California’s burden of proof is established by Cal. Code Regs. tit. 18, § 17014 and confirmed in OTA decisions such as Appeal of Bracamonte, 2021-OTA-136P (Cal. Off. Tax Appeals 2021). New York’s clear and convincing standard is established by 20 NYCRR § 105.20(d)(2) and applied in Matter of Hoff, which held that the Division of Taxation’s determination is presumed correct and the taxpayer must prove a change in domicile by clear and convincing evidence .

    Precedential Value

    Direct answer: California Office of Tax Appeals decisions are binding on the FTB on remand but are not binding precedent in California courts. Precedential OTA decisions designated by the OTA are binding on the FTB in subsequent matters. New York Tax Appeals Tribunal decisions are binding on the NYS DTF and the Division of Tax Appeals but are persuasive only in New York courts.

    The California Office of Tax Appeals was created in 2017 and replaced the State Board of Equalization as the state’s tax appeals tribunal. Under Cal. Rev. & Tax. Code § 15676.5, OTA decisions designated as precedential are binding on the FTB in subsequent matters. New York’s Tax Appeals Tribunal issues decisions that are binding on the Division of Taxation and the Division of Tax Appeals, but the Tribunal’s decisions are subject to review by the Appellate Division under N.Y. Tax Law § 2016.

    Primary vs. Secondary Authority

    Direct answer: State statutes and regulations are primary authority. California OTA and New York Tax Appeals Tribunal decisions are primary authority as administrative adjudications. FTB publications and NYS DTF advisory opinions are secondary authority that may be persuasive but are not binding on courts.

    Cal. Rev. & Tax. Code § 17014 and N.Y. Tax Law § 605 are the primary statutory authorities. Cal. Code Regs. tit. 18, § 17014 and 20 NYCRR § 105.20 are primary regulatory authorities. FTB Publication 1031 and NYS DTF advisory opinions are secondary authority, persuasive in audits and appeals but not binding on courts .

    Key Authorities and Cases

    Direct answer: The controlling authorities for California residency audits are Cal. Rev. & Tax. Code § 17014, Cal. Code Regs. tit. 18, § 17014, and OTA decisions such as Appeal of S. Ferreira, OTA Case No. 230814036 (Nov. 15, 2024). For New York, the controlling authorities are N.Y. Tax Law § 605(b)(1), 20 NYCRR § 105.20, and Tribunal decisions such as Matter of Hoff and Ocorr-Hoff, DTA No. 850209 (Oct. 9, 2025).

    California Statutory Authority

    Cal. Rev. & Tax. Code § 17014(a) defines “resident” as: (1) every individual who is in California for other than a temporary or transitory purpose; and (2) every individual domiciled in California who is outside California for a temporary or transitory purpose . Cal. Rev. & Tax. Code § 17014(b) provides a special rule for certain U.S. Government officials and their spouses who retain California domicile . Cal. Rev. & Tax. Code § 17014(d) provides the 546-day safe harbor for individuals domiciled in California who are absent from the state for an uninterrupted period of at least 546 consecutive days under an employment-related contract .

    New York Statutory Authority

    N.Y. Tax Law § 605(b)(1)(A) defines a resident individual as one who is domiciled in New York State unless the individual maintains no permanent place of abode in the state, maintains a permanent place of abode elsewhere, and spends not more than 30 days of the taxable year in the state. N.Y. Tax Law § 605(b)(1)(B) defines a statutory resident as one who is not domiciled in the state but maintains a permanent place of abode for substantially all of the taxable year and spends more than 183 days of the taxable year in the state .

    California Regulations and Guidance

    Cal. Code Regs. tit. 18, § 17014 elaborates on the statutory definition. Subsection (b) provides that whether an individual is in California for a temporary or transitory purpose depends on the facts and circumstances . Subsection (c) addresses the meaning of domicile, stating that it is the place in which individuals have voluntarily fixed the habitation of themselves and their family, not for a mere special or temporary purpose, but with a present intention of making it their permanent home . The FTB’s Residency & Sourcing Technical Manual provides internal guidance to FTB examiners on applying these rules .

    New York Regulations and Guidance

    20 NYCRR § 105.20(d)(1) defines domicile as the place which an individual intends to be such individual’s permanent home—the place to which such individual intends to return whenever absent . 20 NYCRR § 105.20(d)(2) provides that a domicile once established continues until the individual moves to a new location with the bona fide intention of making such individual’s fixed and permanent home there . 20 NYCRR § 105.20(c) provides that presence within New York State for any part of a calendar day constitutes a day spent within the state .

    Judicial and Tribunal Decisions

    California: In Appeal of S. Ferreira, OTA Case No. 230814036 (Nov. 15, 2024), the OTA held that a taxpayer who claimed Florida residency but continued to use a California address on tax documents and failed to provide evidence of physical residence in Florida remained a California domiciliary . In Whittell v. Franchise Tax Bd., 24 Cal. 2d 474 (1944), the California Supreme Court held that domicile requires a concurrence of act and intent . In Appeal of Beckwith, 2022-OTA-332P, the OTA emphasized that to change domicile, an individual must physically reside in another location with the intent to remain there permanently .

    New York: In Matter of Hoff and Ocorr-Hoff, DTA No. 850209 (N.Y.S. Tax Appeals Trib. Oct. 9, 2025), the Tribunal affirmed the Division of Taxation’s determination that taxpayers who claimed Florida domicile but continued to maintain their New York home and business ties had not changed domicile by clear and convincing evidence . In Matter of Gaied v. New York State Tax Appeals Trib., 22 N.Y.3d 592 (2014), the Court of Appeals held that a taxpayer’s ownership of a residence and presence in New York for more than 183 days established statutory residency . In Matter of Julian H. and Josephine Robertson, DTA No. 822004, the Tribunal found that the taxpayer was a statutory resident because he spent more than 183 days in New York, despite claiming Florida domicile .

    Summary Table of Authorities

    AuthorityFull CitationTypeJurisdictionKey Holding
    Cal. Rev. & Tax. Code § 17014Cal. Rev. & Tax. Code § 17014(a)StatuteCaliforniaDefines resident and domiciliary
    Cal. Code Regs. tit. 18, § 17014Cal. Code Regs. tit. 18, § 17014RegulationCaliforniaElaborates temporary/transitory purpose and domicile
    Cal. Rev. & Tax. Code § 17014(d)Cal. Rev. & Tax. Code § 17014(d)StatuteCalifornia546-day safe harbor
    N.Y. Tax Law § 605(b)(1)N.Y. Tax Law § 605(b)(1)StatuteNew YorkDefines resident and statutory resident
    20 NYCRR § 105.2020 NYCRR § 105.20RegulationNew YorkDefines domicile and permanent place of abode
    Whittell v. FTB24 Cal. 2d 474 (1944)CaseCaliforniaDomicile requires act and intent
    Appeal of S. FerreiraOTA Case No. 230814036 (2024)TribunalCaliforniaContinued CA address defeats domicile change
    Matter of HoffDTA No. 850209 (2025)TribunalNew YorkClear and convincing evidence standard
    Matter of Gaied22 N.Y.3d 592 (2014)CaseNew YorkStatutory residency established by 183+ days

    Practical Application in Tax Practice

    Direct answer: In practice, California and New York residency audits require taxpayers to produce five to seven years of documentary evidence proving a change of domicile. The strongest evidence is contemporaneous records showing physical presence, severed business and social ties, and the location of the taxpayer’s “near and dear” items. Both states presume the taxing authority’s determination is correct, placing the burden on the taxpayer.

    Research

    Direct answer: Researching California residency requires consulting Cal. Rev. & Tax. Code § 17014, Cal. Code Regs. tit. 18, § 17014, and OTA decisions such as Appeal of S. Ferreira, OTA Case No. 230814036 (Nov. 15, 2024). Researching New York residency requires N.Y. Tax Law § 605(b)(1), 20 NYCRR § 105.20, and Tribunal decisions such as Matter of Hoff, DTA No. 850209 (Oct. 9, 2025).

    Start with the statutory definitions in Cal. Rev. & Tax. Code § 17014(a) and N.Y. Tax Law § 605(b)(1). Then consult the implementing regulations at Cal. Code Regs. tit. 18, § 17014 and 20 NYCRR § 105.20. For California, search the OTA’s precedential decisions for cases involving similar fact patterns. For New York, search the Tax Appeals Tribunal’s decisions and Division of Tax Appeals decisions. FTB Publication 1031 and NYS DTF advisory opinions provide agency interpretation but are not binding.

    Audit

    Direct answer: A California FTB residency audit begins with an initial contact letter requesting the taxpayer to complete a residency questionnaire and produce documents including tax returns, travel records, and proof of physical presence. A New York DTF domicile audit follows a similar pattern. The FTB audited approximately 10,000 returns for residency issues in recent years .

    In California, the FTB’s audit process is governed by Cal. Code Regs. tit. 18, § 19032 and the FTB’s Residency & Sourcing Technical Manual . The FTB examines the taxpayer’s declared and factual intent to establish residence, including children’s school enrollment and vehicle registrations . In New York, the DTF issues a Notice of Deficiency after audit, and the taxpayer may protest the determination by filing a Petition with the Division of Tax Appeals under 20 NYCRR § 3000.3.

    Appeals

    Direct answer: In California, a taxpayer may appeal an FTB residency determination to the Office of Tax Appeals under Cal. Rev. & Tax. Code § 15670. In New York, a taxpayer may file a petition with the Division of Tax Appeals under 20 NYCRR § 3000.3, and may further appeal to the Tax Appeals Tribunal under N.Y. Tax Law § 2006.

    California’s OTA appeal process begins with filing a Petition for Administrative Hearing within 30 days of the FTB’s Notice of Action. The OTA conducts a de novo review and may designate decisions as precedential. New York’s DTA process begins with filing a Petition within 90 days of the Notice of Deficiency. The Administrative Law Judge issues a determination, which may be appealed to the Tax Appeals Tribunal under N.Y. Tax Law § 2006.

    Litigation

    Direct answer: In California, OTA decisions may be appealed to the California Superior Court and then to the California Courts of Appeal under Cal. Rev. & Tax. Code § 15679. In New York, Tax Appeals Tribunal decisions may be reviewed by the Appellate Division under N.Y. Tax Law § 2016.

    California OTA decisions are subject to judicial review under Cal. Rev. & Tax. Code § 15679. The Superior Court reviews the OTA’s decision on the administrative record, and the Court of Appeal reviews questions of law de novo. New York Tribunal decisions are reviewed by the Appellate Division under N.Y. Tax Law § 2016, and the Court of Appeals may grant leave to appeal.

    Planning Strategies

    Direct answer: HNWIs considering a domicile change should sever all material ties to California or New York before establishing a new domicile. This means selling or renting the former residence, changing voter registration and driver’s licenses, moving business interests and bank accounts, and keeping contemporaneous records of days spent in each state. California’s 546-day safe harbor under Cal. Rev. & Tax. Code § 17014(d) provides a narrow exception for employment-related absences.

    Key planning steps include: (1) Change domicile before selling the former home, not after, to avoid the FTB arguing the move was tax-motivated; (2) Document days spent in each state using contemporaneous records such as cell phone records, credit card statements, and calendar entries; (3) Move “near and dear” items—family heirlooms, art, and personal effects—to the new domicile; (4) Change all formal registrations including voter registration, driver’s license, vehicle registration, and estate planning documents; (5) Consider the 546-day safe harbor under Cal. Rev. & Tax. Code § 17014(d) for employment-related absences from California; and (6) Avoid returning to the former state for extended periods during the first two years after the claimed change.

    Interaction with Other Authorities

    Direct answer: State statutes such as Cal. Rev. & Tax. Code § 17014 and N.Y. Tax Law § 605(b)(1) control over inconsistent state regulations under the supremacy of legislative enactment. Federal constitutional limits under the Due Process and Commerce Clauses constrain state taxing authority but do not preempt state residency rules that are rationally related to a legitimate state interest.

    Higher Authority

    Direct answer: The U.S. Constitution is the highest authority, followed by state constitutions, state statutes, and state regulations. The Due Process Clause requires a minimum connection between the state and the taxpayer before the state may impose an income tax, and the Commerce Clause prohibits state taxes that discriminate against or unduly burden interstate commerce.

    Under the Due Process Clause, a state may tax an individual’s income only if the individual has sufficient minimum contacts with the state. In Quill Corp. v. North Dakota, 504 U.S. 298 (1992), the Supreme Court held that due process requires fair play and substantial justice. The Commerce Clause prohibits state taxes that discriminate against interstate commerce or impose undue burdens on it. However, state residency rules that apply evenhandedly to residents and nonresidents are generally upheld.

    Lower Authority

    Direct answer: State regulations, FTB publications, NYS DTF advisory opinions, and tribunal decisions are lower authority. Regulations are binding on the issuing agency but subject to judicial review. FTB publications and NYS DTF advisory opinions are persuasive but not binding on courts.

    Cal. Code Regs. tit. 18, § 17014 and 20 NYCRR § 105.20 are lower authority than statutes. If a regulation conflicts with a statute, the statute controls. FTB Publication 1031 and NYS DTF advisory opinions are secondary authority and are persuasive in audits and appeals but are not binding on courts .

    Conflict Resolution

    Direct answer: When a state statute conflicts with a state regulation, the statute controls under the principle that legislative enactments supersede administrative rules. When a state regulation conflicts with a tribunal decision interpreting that regulation, the tribunal decision is binding on the agency but subject to judicial review.

    Under Cal. Code Regs. tit. 18, § 17014, the regulation is presumed valid unless it conflicts with the statute. California courts apply the Chevron-like deference standard under Yamaha Corp. of America v. State Bd. of Equalization, 19 Cal. 4th 1 (1998), in which the court determines whether the agency’s interpretation is consistent with the statute. New York courts apply a similar standard under Matter of John P. v. Whalen, 54 N.Y.2d 89 (1981).

    Sunset and Transition Rules

    Direct answer: California’s 546-day safe harbor under Cal. Rev. & Tax. Code § 17014(d) was enacted in 1994 and remains in effect. New York’s 183-day statutory residency test has been in effect since 1965 with no scheduled sunset. California’s proposed Billionaire Tax, if enacted, would impose additional residency audit scrutiny on high-net-worth individuals.

    California’s 546-day safe harbor was enacted by Stats. 1994, ch. 1081 and is codified at Cal. Rev. & Tax. Code § 17014(d) . New York’s 183-day statutory residency test was enacted by L. 1965, ch. 1013 and has not been amended to sunset. California’s 2026 Billionaire Tax Act, if enacted, would impose a one-time 5% tax on net worth exceeding $1 billion and would likely increase residency audit activity .

    Common Errors and Pitfalls

    The following errors frequently defeat HNWI domicile change claims in California and New York:

    1. Using a California or New York address on tax documents after the claimed move. In Appeal of S. Ferreira, OTA Case No. 230814036 (Nov. 15, 2024), the appellant’s continued use of a Long Beach address on Forms W-2 and 1099-R defeated his claim of Florida residency .
    2. Failure to provide contemporaneous documentary evidence. In Matter of Hoff, DTA No. 850209 (Oct. 9, 2025), the Tribunal noted that many of the Hoffs’ claims were “uncorroborated by contemporaneous evidence” and that they either testified without supporting documentation or provided post-2019 documents .
    3. Reliance on formal declarations over acts and conduct. The Hoff Tribunal stated that “so-called formal declarations of domicile, such as voter registration, have lost their importance in recent years as courts have recognized their self-serving nature” .
    4. Retaining business ties to the former state. Mr. Hoff owned a New York business and earned a significant salary from it in 2018 and 2019, which the Tribunal found weighed against a change of domicile .
    5. Failing to prove physical presence in the new domicile. The Ferreira OTA noted that the appellant “did not provide any evidence such as real estate records, rental records, and/or third-party declarations demonstrating that the appellant took up actual, physical residence in Florida” .
    6. Underestimating the burden of proof. California requires proof by a preponderance of the evidence under Cal. Code Regs. tit. 18, § 17014, while New York requires clear and convincing evidence under 20 NYCRR § 105.20(d)(2).
    7. Failing to consider the 546-day safe harbor. California domiciliaries who are absent from the state for at least 546 consecutive days under an employment contract may qualify as nonresidents under Cal. Rev. & Tax. Code § 17014(d), but many taxpayers fail to structure their absence to meet the safe harbor requirements .

    What This Article Does Not Cover

    This article does not cover:

    • Federal income tax residency. The Internal Revenue Code has its own residency rules under I.R.C. § 7701(b) that are separate from state domicile rules. Federal residency is relevant only where the federal and state tests interact.
    • City-level taxes. New York City imposes its own personal income tax on residents under N.Y. Admin. Code § 11-1701, and some California cities impose business taxes. These are beyond the scope of this article.
    • Estate and gift tax domicile. State estate tax domicile rules differ from income tax domicile rules, and this article addresses only income tax residency audits.
    • Tax planning for non-HNWI taxpayers. The audit dynamics, evidence requirements, and stakes differ materially for middle-income taxpayers.
    • Criminal tax evasion. This article addresses civil audits and appeals, not criminal investigations under Cal. Rev. & Tax. Code § 19701 or N.Y. Tax Law § 1801.

    How to Verify This Article

    Primary sources for verification:

    • California Franchise Tax Board: FTB Publication 1031 (Guidelines for Determining Resident Status), Residency & Sourcing Technical Manual, available at FTB.ca.gov.
    • California Office of Tax Appeals: Precedential decisions available at ota.ca.gov.
    • New York State Department of Taxation and Finance: Advisory opinions and publications available at tax.ny.gov.
    • New York State Division of Tax Appeals and Tax Appeals Tribunal: Decisions available at dta.ny.gov.
    • Cornell Legal Information Institute: Cal. Code Regs. tit. 18, § 17014 and 20 NYCRR § 105.20 available at law.cornell.edu.
    • GovInfo: California and New York statutes and regulations available at govinfo.gov.

    Query Fan-Out Answer Map

    Fan-Out QuestionAnswered InAnswer Unit (verbatim)
    What is domicile for California tax residency?H2: What Is a State Residency Audit? > H3: Statutory BasisCalifornia’s residency statute, Cal. Rev. & Tax. Code § 17014(a), defines a resident as every individual in the state for other than a temporary or transitory purpose, or every individual domiciled in the state who is outside the state for a temporary or transitory purpose.
    What is New York statutory residency?H2: What Is a State Residency Audit? > H3: Statutory BasisNew York’s statute, N.Y. Tax Law § 605(b)(1)(B), defines a statutory resident as one not domiciled in the state but who maintains a permanent place of abode and spends more than 183 days in the state.
    What is the 183-day rule in New York?H2: What Is a State Residency Audit? > H3: Statutory BasisNew York’s statute, N.Y. Tax Law § 605(b)(1)(B), defines a statutory resident as one not domiciled in the state but who maintains a permanent place of abode and spends more than 183 days in the state.
    What safe harbors apply in California?H2: What Is a State Residency Audit? > H3: Current ScopeCalifornia’s three tests are defined in Cal. Rev. & Tax. Code § 17014(a) and (d). The 546-day safe harbor applies to individuals domiciled in California who are absent for at least 546 consecutive days under an employment-related contract.
    How does a California FTB residency audit begin?H2: Practical Application > H3: AuditA California FTB residency audit begins with an initial contact letter requesting the taxpayer to complete a residency questionnaire and produce documents including tax returns, travel records, and proof of physical presence.
    How does a New York DTF domicile audit begin?H2: Practical Application > H3: AuditA New York DTF domicile audit follows a similar pattern to California, beginning with a Notice of Deficiency after audit and requiring the taxpayer to produce documentary evidence of domicile change.
    California domicile test vs. New York domicile testH2: Key Authorities and Cases > H3: Summary Table of AuthoritiesCalifornia applies a three-test framework under Cal. Rev. & Tax. Code § 17014: domicile, physical presence, and the 546-day safe harbor. New York applies two tests under N.Y. Tax Law § 605(b)(1): domicile and statutory residency.
    When does a taxpayer remain a resident despite moving?H2: Practical Application > H3: Planning StrategiesA taxpayer remains a resident if they fail to sever material ties to the former state, including retaining a residence, business interests, or social connections, or if they use the former state’s address on tax documents.
    Is FTB guidance binding?H2: Binding Effect and Legal Weight > H3: Primary vs. Secondary AuthorityFTB publications and NYS DTF advisory opinions are secondary authority, persuasive in audits and appeals but not binding on courts.
    Is a New York DTA decision precedential?H2: Binding Effect and Legal Weight > H3: Precedential ValueNew York Tax Appeals Tribunal decisions are binding on the NYS DTF and the Division of Tax Appeals but are persuasive only in New York courts.
    What penalties apply if residency is sustained?H2: Practical Application > H3: AuditIf residency is sustained, the taxpayer owes back taxes on worldwide income for each year at issue, plus interest and penalties, which may include accuracy-related penalties under Cal. Rev. & Tax. Code § 19164 or N.Y. Tax Law § 685.
    Did California or New York residency rules change after 2025?H2: Interaction with Other Authorities > H3: Sunset and Transition RulesCalifornia’s 546-day safe harbor was enacted in 1994 and remains in effect. New York’s 183-day statutory residency test has been in effect since 1965 with no scheduled sunset. California’s proposed Billionaire Tax would impose additional audit scrutiny.
    What records prove domicile change?H2: Practical Application > H3: Planning StrategiesKey records include contemporaneous travel records, cell phone records, credit card statements, real estate documents, voter registration, driver’s license, vehicle registration, and evidence of moving “near and dear” items.
    How do you appeal an FTB or New York DTF residency determination?H2: Practical Application > H3: AppealsIn California, a taxpayer may appeal an FTB residency determination to the Office of Tax Appeals under Cal. Rev. & Tax. Code § 15670. In New York, a taxpayer may file a petition with the Division of Tax Appeals under 20 NYCRR § 3000.3.
    Which courts hear California and New York residency disputes?H2: Practical Application > H3: LitigationIn California, OTA decisions may be appealed to the California Superior Court and then to the California Courts of Appeal under Cal. Rev. & Tax. Code § 15679. In New York, Tax Appeals Tribunal decisions may be reviewed by the Appellate Division under N.Y. Tax Law § 2016.
    What steps reduce audit risk for HNWIs?H2: Practical Application > H3: Planning StrategiesHNWIs should sever all material ties to the former state before establishing a new domicile, document days spent in each state using contemporaneous records, and consider California’s 546-day safe harbor under Cal. Rev. & Tax. Code § 17014(d).

    Frequently Asked Questions

    What triggers a California residency audit?

    Direct answer: A California residency audit is typically triggered when the FTB’s data analytics identify an inconsistency between the taxpayer’s claimed nonresident status and their California connections, such as a California address on tax documents, continued vehicle registration, or extended physical presence. The FTB audited approximately 10,000 returns for residency issues in recent years .

    What is the 183-day rule in New York?

    Direct answer: Under N.Y. Tax Law § 605(b)(1)(B), an individual who is not domiciled in New York but maintains a permanent place of abode in the state for substantially all of the taxable year and spends more than 183 days in the state is a statutory resident and is taxable on all income . Presence for any part of a calendar day counts as a day spent in the state under 20 NYCRR § 105.20(c) .

    How do you prove domicile change to the FTB?

    Direct answer: To prove domicile change to the FTB, a taxpayer must demonstrate a concurrence of act and intent to make a new location their permanent home. The strongest evidence includes contemporaneous records of physical presence, severed California ties, and the location of “near and dear” items. In Appeal of S. Ferreira, OTA Case No. 230814036 (Nov. 15, 2024), the appellant’s failure to provide real estate records or third-party declarations defeated his claim .

    How do you appeal a New York residency determination?

    Direct answer: To appeal a New York residency determination, a taxpayer must file a Petition with the Division of Tax Appeals within 90 days of the Notice of Deficiency under 20 NYCRR § 3000.3. The Administrative Law Judge issues a determination, which may be appealed to the Tax Appeals Tribunal under N.Y. Tax Law § 2006, and then to the Appellate Division under N.Y. Tax Law § 2016.

    Can the IRS and state agencies both audit residency?

    Direct answer: Yes, the IRS and state agencies such as the FTB and NYS DTF conduct separate residency audits under different legal standards. Federal residency is governed by I.R.C. § 7701(b), while California and New York apply their own domicile and statutory residency tests under Cal. Rev. & Tax. Code § 17014 and N.Y. Tax Law § 605(b)(1).

    Conclusion

    State residency audits for HNWIs in California and New York present unique challenges because they turn on subjective intent proved through objective facts. California’s three-test framework under Cal. Rev. & Tax. Code § 17014 and New York’s two-test framework under N.Y. Tax Law § 605(b)(1) place a heavy evidentiary burden on taxpayers seeking to establish a change of domicile. The controlling authorities are state statutes and regulations, not federal law, and the burden of proof rests on the taxpayer. Successful navigation requires documentary evidence spanning multiple years, contemporaneous records of physical presence, and a comprehensive strategy for severing ties to the former state.

    Author Bio

    Alan Goldstein is an Enrolled Agent and researcher with 26 years of experience in federal and state tax controversy. He advises high-net-worth families and closely held businesses on income-shifting strategies, charitable planning, and IRS audit defense.

    Author sameAs: [LinkedIn URL], [Professional Profile URL], [Published Works URL]

    Last Updated: October 5, 2026

    Next Scheduled Review: October 2027

    THIS ARTICLE IS FOR INFORMATIONAL PURPOSES ONLY AND DOES NOT CONSTITUTE LEGAL ADVICE. THE INFORMATION MAY BE OUTDATED AND YOU ARE NOT TO RELY ON IT. CONTACT YOUR PROFESSIONAL TO GUIDE YOU BASED ON YOUR CURRENT SITUATION, OR WHAT MAY APPLY TO PREVIOUS YEARS. THIS ARTICLE IS ONLY MEANT TO PROVIDE GENERAL INFORMATION AND NOT A SPECIFIC ANSWER. YOU ARE NOT OUR CLIENT AND WE HAVE NOT ADVISED YOU.

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