Cross-Border Estate Planning: Managing International Assets and Multi-Jurisdiction Inheritances

Owning assets in multiple countries can create opportunities for diversification, but it can also make estate planning considerably more complicated. A person might live in one country, hold brokerage accounts in another, own real estate in a third, and have heirs scattered across several jurisdictions.

When that person dies, the estate does not necessarily follow one simple set of inheritance rules.

Different countries can apply different rules to who inherits, which law governs the succession, how property is transferred, where taxes are imposed, and what documents heirs must provide. In some situations, the same estate can become subject to proceedings or tax considerations in more than one jurisdiction.

Cross-border estate planning is therefore less about creating one universal document and more about coordinating the legal, tax, ownership, and administrative systems that apply to the family's assets.

Why International Estates Become Complicated

A domestic estate generally has a relatively clear connection to one legal system. An international estate may have several.

Consider an individual who:

• Lives in France
• Holds U.S. brokerage investments
• Owns an apartment in Spain
• Maintains a bank account in Switzerland
• Is a citizen of another country
• Has children living in different jurisdictions

At death, several separate questions immediately arise.

Which country's succession law determines the heirs? Which authority handles the estate? Does the will need to be recognized abroad? Is the U.S. brokerage account subject to U.S. estate tax? Does the country where the beneficiary lives tax the inheritance? Can foreign taxes be credited against domestic tax?

These questions do not necessarily have the same answer.

The OECD has noted that differences between countries' inheritance and estate-tax systems can produce double taxation, multiple taxation, or, in some circumstances, no taxation. Relief mechanisms also vary considerably.

Start With Domicile, Residence, and Citizenship

One of the first steps in international estate planning is identifying the individual's relevant connections to each jurisdiction.

These terms are not interchangeable.

Citizenship generally describes nationality. Tax residence determines where an individual may be considered resident for particular tax purposes. Domicile can have a separate meaning for estate and gift-tax purposes. Habitual residence can be important under succession laws.

The distinction can materially affect the outcome.

For example, the IRS states that U.S. estate-tax residency is effectively based on domicile for estate and gift-tax purposes. A person can also be a U.S. resident for income-tax purposes while being treated as a nonresident for U.S. estate-tax purposes.

That means an international estate plan should not simply list the countries where someone has lived. It should identify the specific legal connection that each country's rules recognize.

Determine Which Law Governs the Inheritance

The country where an asset is located does not always determine the entire succession.

In the European Union, for example, the general framework under the EU Succession Regulation is designed to determine which authority has jurisdiction and which law applies to a cross-border succession. As a general rule, the law of the deceased's habitual residence applies, although an individual can in certain circumstances choose the law of their nationality to govern the succession. Denmark and Ireland do not participate in the regulation.

The applicable succession law can determine issues such as:

• Who qualifies as an heir
• How much each heir receives
• Whether children have protected inheritance rights
• Whether a spouse has specific statutory rights
• How debts are handled
• The powers of executors and administrators
• Whether certain lifetime gifts affect the estate

Tax treatment is separate. EU succession rules, for example, do not determine inheritance taxes.

This distinction is critical: the law governing succession and the law governing taxation are not necessarily the same.

Real Estate Can Require Local Planning

International real estate is one of the areas where estate planning can become especially difficult.

A person may own a vacation home, rental property, agricultural land, or commercial real estate in another country. Local rules may determine how ownership is transferred, whether probate or a local succession proceeding is required, and whether special restrictions apply.

Real estate can also be treated differently from financial assets for inheritance-tax purposes.

This is why simply placing every foreign property into a single will may not produce the intended result.

Before purchasing international property, owners should understand the local inheritance rules as well as the rules that apply in their home jurisdiction.

U.S. Assets Can Create Separate Estate-Tax Exposure

The United States provides an important example of why asset location matters.

For a person who is neither a U.S. citizen nor domiciled in the United States at death, U.S. estate tax can apply to certain U.S.-situated assets. The IRS specifically identifies U.S. real estate and stock of corporations organized under U.S. law among assets that can be subject to U.S. estate taxation.

For certain nonresident, noncitizen estates, a federal estate-tax return, Form 706-NA, is required when the fair market value of U.S.-situated assets exceeds $60,000, subject to applicable rules and treaty provisions.

That threshold should not be confused with the estate-tax liability itself. Filing requirements, deductions, credits, treaty provisions, and the classification of particular assets can affect the ultimate calculation.

U.S. citizens, meanwhile, are generally subject to U.S. estate taxation on worldwide assets rather than only U.S.-situated property.

Estate-Tax Treaties Can Change the Analysis

When two countries could potentially tax the same estate, an applicable estate or inheritance-tax treaty can become extremely important.

The United States has estate-tax treaties with a number of countries, including Canada, France, Germany, Italy, Japan, Switzerland, and the United Kingdom. Treaty provisions can affect situs determinations, credits, exemptions, and other aspects of the estate-tax calculation.

But treaty coverage is not universal.

The OECD has noted that treaty networks specifically addressing inheritance and estate taxation are much more limited than ordinary income-tax treaty networks. Domestic relief may therefore be the only mechanism available in some situations.

For a large international estate, checking the relevant treaty before structuring ownership can be substantially more useful than trying to resolve double-taxation issues after death.

Use Wills and Trusts Strategically

A cross-border estate plan may require more than one estate-planning document.

Depending on the jurisdictions involved, families may use:

• A primary will
• A separate will covering local assets
• Revocable or irrevocable trusts
• Beneficiary designations
• Joint ownership arrangements
• Corporate or holding structures
• Powers of attorney for financial matters

However, multiple wills require careful coordination.

A local will covering property in one country should not accidentally revoke a broader will covering assets elsewhere. Each document should clearly define its intended geographic or asset scope.

Trusts can also create complications because a trust recognized in one country may receive different tax or legal treatment elsewhere.

The objective should therefore be coordination rather than simply adding more documents.

Keep Beneficiary Designations Updated

Not every asset passes through a will.

Retirement accounts, life insurance policies, certain investment accounts, and other financial products may transfer according to beneficiary designations.

That creates another potential source of conflict.

An individual might update a will after a divorce or remarriage but leave an old beneficiary designation unchanged. In some jurisdictions, the contractual beneficiary designation may control the transfer of the account.

International families should maintain a centralized record showing:

• Account owner
• Institution
• Country
• Account type
• Beneficiary
• Currency
• Current approximate value
• Applicable tax jurisdiction
• Relevant estate-planning document

This inventory can save heirs significant time during estate administration.

Foreign Financial Accounts Require Documentation

For U.S. persons, foreign financial accounts can also create separate reporting obligations during life.

FinCEN states that a U.S. person with a financial interest in or signature authority over foreign financial accounts generally must file an FBAR when the aggregate value of reportable accounts exceeds $10,000 at any point during the calendar year.

Estate planning should account for these reporting requirements rather than treating foreign accounts as purely inheritance issues.

The executor may also need historical account information, ownership records, tax filings, and documentation showing how assets were acquired.

Currency and Valuation Matter

An international estate can contain assets denominated in several currencies.

A portfolio might include dollars, euros, pounds, Swiss francs, or local currencies. The estate may need to establish values as of a particular valuation date, while tax authorities in different countries may apply their own valuation rules or exchange-rate conventions.

The difference can become material for large estates.

For that reason, records should identify the asset's original purchase price, ownership history, current value, currency, and any associated debt.

The IRS, for example, generally requires estate assets to be valued at fair market value for federal estate-tax purposes, with specific rules governing valuation.

Plan for the Administration, Not Just the Tax Bill

International estate planning is often discussed primarily in terms of reducing taxes. But administrative friction can be just as important.

Heirs may have to obtain:

• Death certificates
• Certified copies of wills
• Probate or succession documents
• Apostilles or legalizations
• Certified translations
• Tax identification numbers
• Bank and brokerage statements
• Property records
• Proof of heirship
• Estate-tax clearance or transfer certificates

Within the EU, a European Certificate of Succession can help heirs, executors, and administrators establish their status when dealing with assets in another participating EU country.

Outside such frameworks, the process may be considerably more fragmented.

Build a Jurisdiction-by-Jurisdiction Estate Map

A practical international estate plan should begin with an asset map rather than a tax strategy.

For every significant asset, record:

Once this map exists, advisers in each relevant jurisdiction can determine where conflicts or duplicated tax exposure may exist.

A Cross-Border Estate Plan Should Be Reviewed Regularly

International estate planning is not a one-time project.

Moving countries, acquiring property, opening a foreign brokerage account, obtaining citizenship, marrying, divorcing, having children, establishing a business, or changing tax residence can alter the analysis.

Even changes to domestic law can affect an existing plan.

The European Commission specifically notes that succession rules differ substantially between countries and that inheritance-tax rules remain outside the EU's succession framework.

A periodic review should therefore confirm that the person's residence, domicile, citizenship, asset ownership, beneficiary designations, wills, trusts, and tax obligations remain aligned.

The Core Principle: Coordinate Before You Transfer

International estate planning becomes much easier when the family identifies jurisdictional issues before assets are transferred or inherited.

The key questions are:

1. Where is the owner domiciled and tax resident?
2. Which countries have a claim over the estate?
3. Where is each asset legally situated?
4. Which country's succession law governs?
5. Are there forced-heirship or reserved-share rules?
6. Could more than one country impose estate or inheritance tax?
7. Is there a treaty or domestic foreign-tax credit?
8. Which documents will heirs need to access each asset?
9. Do wills, trusts, and beneficiary designations agree?
10. Who will coordinate the estate after death?

There is no universal structure that solves every international inheritance problem. A plan that works for a family with U.S. securities and European real estate may be inappropriate for someone with Asian business interests, Middle Eastern property, or accounts in several other jurisdictions.

The most effective approach is usually a coordinated one: map the assets, establish the relevant legal connections, identify the applicable succession rules, model potential taxes, and ensure that documents in different countries do not contradict one another.

For families with significant international wealth, that preparation can reduce delays, prevent avoidable disputes, and give heirs a much clearer path for transferring assets across borders.