Non-domicile means you live in one country but your permanent legal home, for tax and legal purposes, is recognized as being somewhere else. In the United States, being non-domiciled changes almost everything about how you’re taxed: your U.S. estate tax exemption drops from roughly $7 million to just $60,000 of U.S.-situated assets, your income tax generally applies only to U.S.-source income, and different rules govern which of your gifts and inheritances the IRS can reach. The label also decides which country’s inheritance laws control your movable property when you die.
Domicile Is Not the Same as Residence
Residence is simply where you live at a given moment. Domicile is the one place you treat as your permanent home, even if you haven’t been there in years. You can rent apartments in three cities and still have only one domicile. Someone working in New York for a decade can remain domiciled in their home country if they genuinely intend to return there permanently.
For federal estate and gift tax purposes, the IRS treats domicile as the controlling concept rather than physical presence. A person acquires a domicile by living in a place with no definite present intention of leaving. Holding a green card, notably, is not conclusive proof that someone intends to be domiciled in the United States.1Internal Revenue Service. Frequently Asked Questions on Estate Taxes
The Three Ways You Get a Domicile
Domicile falls into three categories:
- Domicile of origin, acquired at birth from your parents. It sticks with you until you affirmatively establish a new one.
- Domicile of choice, established by physically moving to a new place with the genuine intention of staying permanently or indefinitely. Both elements are required.
- Domicile of dependence, which applies to minors and others who lack legal capacity. A child’s domicile typically follows that of their parents until the age of majority.
Most disputes involve domicile of choice, because intent is invisible and people’s actions don’t always match what they claim.
How Tax Authorities Decide Where You Are Domiciled
No single document proves domicile. Courts and tax authorities weigh a range of facts, and the person claiming a change of domicile bears the burden of proving it, often by clear and convincing evidence. The factors that carry the most weight include:
- Time spent in each location. More than 183 days a year in one place is strong evidence, though not decisive on its own.
- Where your primary, fully furnished home is, as opposed to a vacation property.
- Voter registration.
- Driver’s license and vehicle registration.
- Where your primary bank accounts and financial ties sit.
- Statements in wills, trusts, and powers of attorney identifying you as a resident of a particular place.
- Where your spouse lives, where your children attend school, and your religious or community affiliations.
For non-U.S. citizens, authorities also weigh visa applications, prior tax returns, green card status, continuing ties to the former home country, and where business interests are located.1Internal Revenue Service. Frequently Asked Questions on Estate Taxes Saying you moved isn’t enough if your license, voter registration, and family remain in the old location.
What Non-Domicile Means for U.S. Income Tax
The United States taxes non-domiciled nonresident aliens on their U.S.-source income, but not on income earned abroad. The rules split by type of income.
Investment income from U.S. sources, including dividends, interest, rents, and royalties, faces a flat 30% withholding tax.2eCFR. 26 CFR 1.871-7 – Taxation of Nonresident Alien Individuals Tax treaties between the U.S. and many countries reduce that rate significantly, sometimes to zero for categories like interest income. Claiming the reduced rate usually requires filing IRS Form W-8BEN with the payer.
Income effectively connected with a U.S. trade or business, such as wages from a U.S. employer, gets taxed at the same graduated rates that apply to everyone else. Income earned entirely outside the country stays outside the U.S. tax net.
Foreign persons who sell U.S. real estate face a separate withholding regime, FIRPTA, which generally requires the buyer to withhold 15% of the sale price and remit it to the IRS.3Internal Revenue Service. FIRPTA Withholding
What Non-Domicile Means for U.S. Estate and Gift Tax
This is where the stakes get largest. A person domiciled in the United States receives a federal estate tax exemption that shelters millions of dollars. In 2026, that exemption reverts to a base of $5 million adjusted for inflation, after the temporary increase enacted in 2017 expires.4Internal Revenue Service. Estate and Gift Tax FAQs A non-domiciled nonresident, by contrast, gets a credit of just $13,000 against estate tax, which effectively exempts only the first $60,000 of U.S.-situated assets.5Office of the Law Revision Counsel. 26 USC 2102 – Credits Against Tax Amounts above that are taxed at rates reaching 40%.6Office of the Law Revision Counsel. 26 USC 2101 – Tax Imposed
The offsetting advantage is that only U.S.-situated assets are included in a non-domiciled person’s taxable estate, not their worldwide wealth. U.S.-situated assets generally include U.S. real property, tangible personal property physically present in the U.S., and shares of stock in U.S. corporations. Assets held abroad are outside the reach of U.S. estate tax. Estate tax treaties between the U.S. and certain countries can further limit which assets count as U.S.-situated or provide a more generous exemption.7Internal Revenue Service. Some Nonresidents With U.S. Assets Must File Estate Tax Returns
Gift tax rules run in the same direction but with an important twist. A non-domiciled nonresident who gives away tangible property located in the U.S. owes gift tax on transfers above the $19,000 annual exclusion per recipient.8Internal Revenue Service. Frequently Asked Questions on Gift Taxes Transfers of intangible property, including stock in U.S. companies, are completely exempt from U.S. gift tax when made by a nonresident non-citizen.9Office of the Law Revision Counsel. 26 USC 2501 – Imposition of Tax Gifting U.S. stock during life avoids gift tax entirely, whereas the same stock at death is included in the estate.
Gifts to a spouse who is not a U.S. citizen are subject to a separate annual exclusion of $194,000 in 2026, rather than the unlimited marital deduction available between two U.S.-citizen spouses.10Internal Revenue Service. Frequently Asked Questions on Gift Taxes for Nonresidents Not Citizens of the United States
You Can Be a U.S. Tax Resident and Still Non-Domiciled
Domicile isn’t the only way the U.S. decides whether to tax you as a resident. The substantial presence test is a separate, mechanical calculation based on physical days. You meet it if you were present for at least 31 days during the current year and at least 183 days across a three-year weighted period, counting all days in the current year, one-third of days in the prior year, and one-sixth of days in the year before that.11Internal Revenue Service. Substantial Presence Test
Meeting the test doesn’t automatically make you domiciled in the U.S. for estate and gift tax purposes, but it does make you a tax resident for income tax, which lets the IRS reach your worldwide income. The two concepts run on parallel tracks: you can be a tax resident under the substantial presence test while remaining non-domiciled for estate tax.
If you meet the substantial presence test but want to be treated as a nonresident for income tax, you can claim the closer connection exception by filing Form 8840. To qualify, you must have been present fewer than 183 days during the year, maintained a tax home in a foreign country all year, and had a closer connection to that country than to the United States. You also cannot have applied for or taken steps toward getting a green card.12Internal Revenue Service. Closer Connection Exception to the Substantial Presence Test Missing the Form 8840 deadline means losing the exception unless you can show through clear and convincing evidence that you took reasonable steps to comply.
Visa Status Can Undercut a Non-Domicile Claim
Some non-immigrant visas, particularly the H-1B and L-1, allow dual intent, meaning you can hold the visa while intending to stay permanently. If you hold one and have bought a home, registered to vote, and moved your life to the U.S., a tax authority could argue you’ve established U.S. domicile even without a green card.
Other visa categories, including F-1 student visas and most tourist visas, presume you intend to return home. That presumption cuts both ways: it weakens any claim of U.S. domicile and strengthens your non-domicile position if a tax authority tries to reclassify you.
Non-Domicile Rules Outside the U.S.
The term “non-dom” is most familiar from the United Kingdom and Ireland, where it drives how foreign income is taxed. The two regimes now look very different.
United Kingdom
The UK abolished the old remittance basis on April 6, 2025, and replaced it with a four-year Foreign Income and Gains (FIG) regime.13GOV.UK. Reforming the Taxation of Non-UK Domiciled Individuals Only individuals who become UK tax resident after at least 10 consecutive years as non-residents qualify, and they can claim relief on foreign income and gains for up to four consecutive tax years. Claiming the relief means losing personal tax-free allowances for income tax and capital gains tax.14GOV.UK. Check if You Can Claim the 4-Year Foreign Income and Gains Regime After four years, worldwide income becomes taxable in the UK.
Ireland
Ireland still offers a remittance basis to residents who are not domiciled there. An Irish-resident, non-domiciled individual pays tax on Irish-source income but can keep foreign income and gains outside the Irish tax net as long as the money is not brought into Ireland. Ireland does not impose an annual charge for using the remittance basis, and cash accumulated before Irish tax residency began can be brought in without triggering additional tax.15Revenue Commissioners. Tax and Duty Manual Part 05-01-21A – The Remittance Basis of Assessment
Domicile Also Decides Which Country’s Inheritance Law Applies
Beyond taxes, domicile controls which country’s laws govern your property at death. Movable property, including bank accounts, investments, and personal belongings, generally follows the law of the decedent’s domicile. Real estate follows the law of the country where the property sits, regardless of where the owner was domiciled.
That split creates real complications. A non-domiciled individual living in the U.S. may find their American brokerage account governed by the inheritance laws of their home country, while their U.S. real estate follows American law. The two systems may have very different rules on spousal shares, forced heirship, and the validity of will provisions. Anyone with meaningful assets in more than one country needs estate planning documents that account for both jurisdictions, not just the place they currently live.