Domicile vs. Residency: What to Know Before Relocating

• Frequently, domicile requires more than a move—it must be consistently supported across legal, financial, and lifestyle factors
• States assess the full picture, weighing time, property, business, and personal ties to determine domicile
• In our view, residency audits are increasingly data-driven, making consistent, well-documented records essential

For many successful families, the appeal of relocating to a new state beyond warmer weather and more opportunities to golf or ski, for example; States with no state income taxes and estate taxes are considered preferred destinations for wealth preservation.

However, leaving a high-tax state is often more legally complex than arriving in a new one.  Taxing authorities in states like New York, Connecticut, and California aren’t letting go of their flocking residents that easily. Recent court rulings demonstrate that "checking the boxes" may no longer be enough; rather, Courts evaluate several factors that must show individuals made a true change to their “domicile.”

Without a strategic domicile plan, you may find yourself in a "residency audit," where your former state claims you never truly left—leaving you or your family with a surprise tax bill. The following four key considerations can help you evaluate and create a domicile plan to guide you through a move to a state that may have more favorable tax laws and policies.

Before packing your bags, it’s vital to understand the difference between “statutory residence” and domicile. State statutes generally define residency for income tax purposes as referring to both concepts, and taxing authorities and courts use different standards and analysis to evaluate each concept.

This is a generally straightforward concept—how many days were you in the state? Many states consider you a resident if you spend more than 183 days (six months and a day) within their borders. Therefore, if you are present in the state for the requisite number of days then you are a statutory resident for that state’s income tax purposes.

Domicile is generally considered the place where a person is “most closely associated.”¹ A person’s “true, fixed, principal, and permanent home.”² In general, domicile is evidenced by physical presence as well as an individual’s intent—demonstrated by his or her actions. While you may have multiple houses or residences, a person can have only one domicile.

Because an existing domicile continues until a new one is acquired, it is up to you to prove, generally by “clear and convincing evidence,” a change in domicile. Therefore, it is critical to understand the factors that courts may look at in determining whether you have truly changed your domicile. 

Domicile is determined by a number of factors, and whether there has been a change in domicile is a question “of fact rather than law, and it frequently depends upon a variety of circumstances, which differ as widely as the peculiarities of individuals” (Matter of Newcomb, 192 NY 238, 250 [1908]). Generally, this means that a taxpayer must show a change of lifestyle to prove a change of domicile and “[t]here must be a present, definite, and honest purpose to give up the old and take up the new place as the domicile of the person whose status is under consideration . . .” (Matter of Newcomb, 192 NY at 251). Figure one summarizes criteria significant to courts addressing issues of domicile.  However, it’s important to note that no one factor is dispositive to establish domicile.  Courts look at the totality of the circumstances to evaluate whether you have changed your domicile. 

Sources: Analysis derived from the following court cases. 

Matter of John J. Hoff & Kathleen Ocorr-Hoff, DTA No. 850209 (N.Y. Tax Appeals Tribunal Oct. 9, 2025) / In re Newcomb's Estate, 192 N.Y. 238, 84 N.E. 950 (1908) / Whittell v. Franchise Tax Board, 231 Cal. App. 2d 278, 41 Cal. Rptr. 673 (Cal. Ct. App. 1964) / In the Matter of the Appeal of Q. Tran and R. Medina, OTA Case No. 21088364 (Cal. Office of Tax Appeals Jan. 28, 2025) / In the Matter of the Appeal of S. Ferreira, OTA Case No. 230814036 (Cal. Office of Tax Appeals Nov. 15, 2024) / Appeal of Stephen D. Bragg, Nos. 110567 & 119357, 2003-SBE-002 (Cal. State Bd. Equalization May 28, 2003).
Daniels v. Commissioner of Revenue Services, No. SC 21150 (Conn. June 16, 2026).

State residency auditors have shifted away from only relying on your financial statements, calendars, or paper receipts in connection with income tax audits based on residency challenges. Instead, auditors now deploy advanced digital forensics to reconstruct your movements and habits to provide proof of your intent.

Here are the three most significant data sources auditors now use:

In recent years, many states have ramped up their audit and enforcement efforts in taxation, particularly the higher-tax jurisdictions impacted by residents migrating to lower-tax jurisdictions (in particular after the COVID-19 pandemic). The following are examples of what may increase the likelihood of being selected for audit:

• Continuing to claim residency-based benefits, such as local licenses or property tax exemptions, after reporting a residency change
• Continuing to list the former address on tax documents, including tax returns as well as tax forms (Forms 1099, K-1, W-2, etc.)
• Filing an individual income tax return that reflects a change in resident status (e.g., the first part-year or nonresident return)
• Filing a nonresident return that reports a significant difference between the federal income and the in-state income
• Past audit history, specifically when the taxpayer’s residency status was disputed

Successfully moving your domicile requires more than a change of address; it often requires a coordinated strategy between your tax, legal, and wealth advisors.

A coordinated approach across wealth management, tax, and estate planning is essential.

To help put these considerations into action, we encourage you to view the domicile planning checklist.

You can also explore additional wealth planning strategies to help align your tax, estate, and long-term financial goals.

Sources: 

1 domicile | Wex | US Law | LII / Legal Information Institute

2 Ibid

This article is for informational purposes only and is not intended as an offer or solicitation for the sale of any financial product or service. It is not designed or intended to provide financial, tax, legal, investment, accounting, or other professional advice since such advice always requires consideration of individual circumstances. If professional advice is needed, the services of a professional advisor should be sought.

There is no assurance the any investment, financial, or estate planning strategy will be successful. These strategies require consideration for suitability of the individual, business, or investor.

Wilmington Trust is not authorized to and does not provide legal, tax, or accounting advice. Our advice and recommendations provided to you are illustrative only and subject to the opinions and advice of your own attorney, tax advisor, or other professional advisor.

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