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Connect on LinkedInTax residency is the status a country or tax jurisdiction uses to decide whether a person is treated as a resident for tax purposes. For U.S. expats, tax residency can be complicated because they may become tax resident in another country while still having U.S. tax filing obligations as a citizen or green card holder.
Why it matters for U.S. expats
Tax residency matters because it can affect which country taxes worldwide income, which country taxes only local-source income, whether a tax treaty applies, and how tools such as the Foreign Tax Credit or Foreign Earned Income Exclusion are used to reduce double taxation.
Common questions
1. What is tax residency?
Tax residency is a tax status that determines how a country taxes an individual. A tax resident is often taxed on worldwide income, while a nonresident is usually taxed only on income sourced to that country.
2. Can a U.S. expat be tax resident in another country?
Yes. Many U.S. expats become tax resident in the country where they live, work, own a home, spend significant time, or meet that country’s residency rules.
3. Does foreign tax residency end U.S. tax filing?
No. U.S. citizens and green card holders usually still need to file U.S. tax returns even if they are tax resident in another country.
4. Can someone be tax resident in two countries?
Yes. A person can be treated as tax resident in two countries under each country’s domestic rules. Tax treaties may help decide which country has primary taxing rights for certain income.
5. How is tax residency determined?
Tax residency depends on the country. Common factors include days spent in the country, permanent home, work location, family ties, immigration status, center of economic interests, and intent to remain.
6. Is tax residency the same as tax home?
No. Tax residency determines how a country taxes someone. Tax home is usually the main place of work or business and is especially important for U.S. expats claiming the Foreign Earned Income Exclusion.
7. Is tax residency the same as domicile?
No. Domicile usually refers to a permanent legal home or long-term intent to return. Tax residency is based on the tax rules of a specific country or jurisdiction.
8. What is a treaty tie-breaker?
A treaty tie-breaker is a rule in some tax treaties that helps decide which country treats a dual-resident taxpayer as resident for treaty purposes. It may look at permanent home, center of vital interests, habitual abode, nationality, or mutual agreement between tax authorities.
9. What records help prove tax residency?
Useful records can include visas, residence permits, leases, home purchase records, utility bills, employment contracts, travel records, local tax filings, foreign tax assessments, school records, healthcare registrations, and bank statements.
Related forms
- Form 1040: U.S. Individual Income Tax Return
- Form 2555: Foreign Earned Income Exclusion
- Form 1116: Foreign Tax Credit
- Form 8833: Treaty-Based Return Position Disclosure
- Form 1040-NR: U.S. Nonresident Alien Income Tax Return
When to get help
Professional guidance is important when:
- You live, work, or spend significant time in more than one country.
- You may be tax resident in both the United States and another country.
- You are unsure whether a tax treaty applies.
- You need to claim the Foreign Tax Credit or Foreign Earned Income Exclusion.
- You moved countries during the tax year.
- You have income, investments, property, or business interests in more than one country.
- You need to file both U.S. and foreign tax returns.
- You are unsure whether Form 8833 is required for a treaty-based position.
Bright!Tax can help review your tax residency position, coordinate U.S. and foreign tax reporting, and identify credits, exclusions, or treaty positions that may reduce double taxation. Get started with Bright!Tax.
Related Bright!Tax guides
- US Expat Taxes: 14 Tips From the Experts Who Help Americans Abroad File Right
- Foreign Tax Credit: How Expats Can Lower Their U.S. Tax Bill
- Foreign Earned Income Exclusion for U.S. Expats
- How Many Days Can Expats Spend in the US For Taxes?
Official sources
- IRS: U.S. citizens and residents abroad filing requirements
- IRS: Determining an individual’s tax residency status
- IRS: Introduction to residency under U.S. tax law
- IRS: Substantial Presence Test
- IRS: About Form 8833
- OECD: Tax residency
Reviewed by
Katelynn Minott, CPA & CEO
Last reviewed
July 2026