Inheritance Tax Living Abroad: 2026 Guide to Domicile

Inheritance Tax Living Abroad: What Actually Determines What You Owe

Last updated: August 2026

Inheritance tax living abroad depends primarily on domicile, not residency or citizenship, and that single distinction confuses more people than nearly any other cross-border tax question. You can be tax resident in one country for income tax purposes while remaining domiciled in another for estate tax purposes, and those two statuses can produce very different tax outcomes on the same estate.

Income tax residency is confusing enough on its own. Estate and inheritance tax adds a second, mostly unrelated concept, domicile, plus a third: the situs, or physical location, of specific assets. Get any of these three wrong when planning your estate, and the mistake surfaces only after you're no longer around to fix it.

This guide covers the domicile-versus-residency distinction that matters most, US estate tax basics for expats and non-residents, how situs-based and domicile-based treaties actually work, the UK's newly overhauled inheritance tax rules, and the practical planning steps worth taking now.

Key Takeaways

- Estate and inheritance tax liability typically hinges on domicile, a legal concept about your permanent home with far more inertia than tax residency, not on where you currently live or pay income tax.

- The 2026 US federal estate tax exemption is $15 million for US domiciliaries, but non-domiciled non-resident aliens face a US-situs asset exemption of just $60,000, a dramatic gap that catches foreign owners of US assets off guard.

- The US has estate tax treaties with roughly 15 countries plus Canada, and whether a treaty applies can materially change your outcome.

- As of April 6, 2025, the UK moved to a residence-based inheritance tax test: long-term UK residents (broadly, resident 10 of the last 20 years) now face UK IHT on worldwide assets, with a "tail" period of exposure that can persist even after leaving.

- Forced heirship rules in many civil-law countries can override a will's distribution wishes for locally situated assets, a separate concept from tax exposure entirely.

Domicile vs. Residency vs. Citizenship: The Distinction That Matters Most

Domicile is a legal concept distinct from both tax residency and citizenship, and it's the concept estate and inheritance tax rules actually hinge on in most jurisdictions.

Broadly, domicile is the country you treat as your permanent home, the place you intend to return to, with far more inertia than tax residency. Tax residency can shift year to year based on day-counts and formal registrations. Domicile tends to stick with you, sometimes for years after you've physically relocated, unless you take specific, deliberate steps to change it.

This mismatch catches people constantly. A founder who's spent the last six years tax resident in Portugal, filing Portuguese income tax returns and meeting every day-count threshold, may still be domiciled in their country of origin for estate tax purposes, because domicile requires more than physical presence and formal registration. It requires demonstrating genuine, permanent intent to abandon your prior domicile.

Want the fuller picture of how residency concepts interact across borders? Read our guide to the 183-day rule and dual residency →

Inheritance Tax Living Abroad: US Estate Tax Basics for Expats and Non-Residents

US estate tax treatment splits sharply based on domicile status, and the gap between the two outcomes is large enough to reshape how anyone holding US assets should plan.

The $15 Million Exemption (and the $60,000 Trap)

US domiciliaries, generally US citizens and green card holders domiciled in the US, benefit from a 2026 federal estate tax exemption of $15 million per individual. Estates below that threshold owe no federal estate tax at all.

Non-resident aliens, meaning individuals who are neither US citizens nor domiciled in the US, face a dramatically different picture. Per the IRS's own guidance on nonresidents with US assets, US-situs assets, real estate, US-based business interests, and certain US securities held directly, become taxable above just $60,000. That's not a typo. The exemption gap between a US domiciliary and a non-domiciled foreign owner of US assets is roughly 250 times smaller for the latter.

Farid, a founder from Dubai who'd built a modest US real estate portfolio through direct ownership while expanding his business into the US market, assumed his estate planning could wait until his holdings grew larger. He hadn't realized that as a non-domiciled foreign national, his US-situs assets were exposed to US estate tax above just $60,000, a threshold his existing property already exceeded several times over. Restructuring his US real estate holdings through a properly structured entity, with guidance from a cross-border estate specialist, became an urgent priority rather than a someday project.

Curious how a Delaware LLC affects US-situs asset exposure? Explore Delaware LLC formation →

US Estate Tax Treaty Countries

The US maintains estate tax treaties with roughly 15 countries plus Canada, including the UK, Germany, France, Italy, Greece, Japan, Australia, Switzerland, and the Netherlands, among others. These treaties can significantly change the outcome for a cross-border estate, sometimes reallocating taxing rights entirely or providing exemption amounts closer to the US domiciliary threshold rather than the $60,000 non-resident figure.

Whether a treaty applies between your home country and the US is one of the first questions a cross-border estate specialist will ask, because the answer changes the entire planning approach.

Countries with a US estate or gift tax treaty currently include:

• United Kingdom
• Germany
• France
• Italy
• Greece
• Japan
• Australia
• Switzerland
• The Netherlands
• Canada (under a separate treaty framework)
• A handful of others, roughly 15 countries in total plus Canada

If your home country isn't on this list, the default $60,000 non-resident alien threshold applies with no treaty relief, which makes the gap between domiciled and non-domiciled treatment even starker.

Situs-Based vs. Domicile-Based Treaties: How They Work

Not all estate tax treaties work the same way, and understanding which type applies changes your planning strategy considerably.

Situs-based treaties assign taxing rights based on where a specific asset is physically located. Real estate gets taxed where it sits. Business property gets taxed where the business actually operates. Under this model, each country taxes only the assets situated within its own borders, largely ignoring the owner's broader domicile status.

Domicile-based treaties work differently. They assign a single "treaty domicile" to the individual, giving one country the primary right to tax worldwide transfers while limiting the other country's reach mostly to locally situated property. This model concentrates taxing authority in one jurisdiction rather than splitting it asset-by-asset.

Ready to see how this connects to your broader tax obligations abroad? Read our guide to tax obligations when moving abroad →

Knowing which framework governs the relationship between your home and host countries, if a treaty exists at all, is not optional homework. It's the foundation every subsequent planning decision rests on.

The UK's New Rules: Residence-Based Inheritance Tax (2025/2026)

This is one of the most consequential recent changes in this space, and it directly affects anyone connected to the UK's tax system.

As of April 6, 2025, the UK moved from a domicile-based to a residence-based inheritance tax test. Long-term UK residents, broadly defined as resident for 10 of the last 20 years, are now subject to UK inheritance tax on their worldwide assets, not just UK-situated property. The HMRC Inheritance Tax Manual's guidance on foreign property lays out the technical mechanics of how this applies to overseas assets specifically.

The change includes a "tail" period: continued IHT exposure that can apply even after someone has left the UK, depending on how long they were resident before departing. This represents a fundamental shift from the old domicile-based system, where someone could remain non-UK-domiciled indefinitely (in the right circumstances) and shield worldwide assets from UK IHT regardless of how long they'd lived there.

Sophie, a French entrepreneur who'd lived in London for 14 years building her company, assumed her non-domiciled status under the old rules meant her worldwide assets, including a family property in France and investments across several countries, sat outside UK inheritance tax entirely. Under the new residence-based test, her 14 years of UK residence puts her squarely inside the worldwide-exposure threshold. She's now working through what the "tail" period means for her specifically as she considers relocating again, since simply leaving the UK doesn't immediately end the exposure the way it might have under the prior system.

Practical Planning Basics for Inheritance Tax Living Abroad

A handful of practical considerations sit alongside the tax mechanics, and some of them are about wishes and distribution rather than tax rates at all.

Wills across jurisdictions: Many jurisdictions require or strongly favor a local will covering locally situated assets. Conflicting wills across multiple jurisdictions, one covering your home country assets, another covering assets where you now live, can create real complications if they're not coordinated carefully.

Forced heirship rules: In many civil-law countries, much of the EU and parts of Latin America, forced heirship rules can override a will's distribution wishes entirely for locally situated assets. This is a distinct concept from tax exposure. Even if your estate tax planning is flawless, forced heirship rules can still redirect where your assets actually go, regardless of what your will says.

Trusts and company structures: These can shift situs and domicile exposure in some cases, but they're increasingly scrutinized and highly jurisdiction-dependent. What works cleanly in one country's legal system may not translate at all in another.

Curious about the reporting side of holding assets across multiple countries? See our guide to FATCA and CRS reporting for global citizens →

A practical starting checklist for anyone with assets in more than one country:

• Confirm your domicile status, not just your tax residency, in each country where you hold significant assets.
• Identify every asset's situs. Real estate, business interests, and certain securities can each have different situs rules even within the same estate.
• Check whether a US estate tax treaty applies, if you hold any US-situs assets and aren't a US domiciliary.
• Draft or review wills for each jurisdiction with meaningful assets, coordinated to avoid conflicting instructions.
• Ask specifically about forced heirship if you hold property in a civil-law country, since this can override your will regardless of your tax planning.

When to Bring In a Cross-Border Estate Specialist

This is unambiguously a "get a specialist" area. Cross-border estate planning interacts with multiple countries' laws simultaneously, domicile rules, situs rules, treaty provisions, forced heirship, and local will requirements can all apply at once to a single estate, and mistakes here are costly and largely irreversible after death.

If you hold assets across more than one country, particularly US-situs assets as a non-US-domiciled individual or UK connections under the new residence-based test, getting a cross-border estate specialist involved now, not after a life event forces the question, is worth the cost.

Note: This guide is for research and educational purposes. It does not constitute legal or tax advice. Estate and inheritance tax treatment depends heavily on your specific domicile status, asset locations, and applicable treaties, and rules change. Always confirm current requirements with a licensed cross-border estate specialist before making planning decisions.

Watch: For a walkthrough of how domicile, situs, and treaty status interact in a real cross-border estate, see this video overview.

(Editorial note: replace VIDEO_ID_PLACEHOLDER with Atlasway's own walkthrough video or a verified, currently-live third-party source before this article goes live.)

If you're relocating and want a clearer sense of how domicile and situs rules might affect your estate before you talk to a specialist, get in touch with Atlasway →. We're a research platform, not a tax firm, so there's no pressure either way, just a clearer starting point.

Conclusion

Inheritance tax living abroad turns on domicile, asset situs, and applicable treaties, not simply on where you currently live or pay income tax. The gap between the US domiciliary $15 million exemption and the non-resident alien $60,000 threshold, the UK's shift to a residence-based worldwide IHT test, and forced heirship rules that can override a will entirely are the three places cross-border estates most often run into trouble.

None of this is a DIY calculation once real assets and multiple jurisdictions are involved. The stakes are permanent in a way few other tax mistakes are, since an estate planning error typically surfaces only after the person who could fix it is gone.

Atlasway exists for exactly this stage of the decision: understanding how domicile, situs, and treaty status interact with your specific situation before you commit to a jurisdiction or an asset structure. When you're ready for a conversation specific to your estate and your countries of connection, that's where a licensed cross-border estate specialist takes over.

The information in this article is for research and educational purposes only. It does not constitute legal or tax advice. Program rules, investment thresholds, and government fees change frequently — always verify current requirements with a licensed advisor before taking action.