International Estate Planning for HNW Individuals

Assets and beneficiaries of high-net-worth (HNW) families and UK expats are often dispersed across multiple jurisdictions. Consequently, these individuals face estate planning challenges that purely domestic strategies do not fully address.

Specifically, relying on a single will is rarely sufficient for families and individuals holding foreign property, investments, and businesses. Such estates require global strategies that account for cross-border tax exposure and potential succession law conflicts.

This article outlines the core elements of international estate planning and explores the complexities HNW families with global assets encounter when structuring their estate plans.

How Cross-Border Global Estate Planning Differs From Domestic Estate Planning

The strategies HNW families and UK expats must incorporate into their estate plans depend on the location of their assets. Holding wealth in a single jurisdiction makes estate planning more straightforward, as it involves navigating only one tax and succession framework.

Having multi-jurisdictional assets and internationally dispersed beneficiaries requires coordinating cross-border legal and tax frameworks, such as:

• Succession rules.
• Inheritance tax implications.
• Reporting and compliance obligations.

Relying on a single will is often insufficient to govern the distribution of global assets, particularly where local probate procedures, asset-holder requirements, language or notarisation formalities, and forced heirship rules affect how overseas assets are administered or transferred.

Without an appropriate strategy in place, your global estate may be exposed to:

• Tax liabilities in multiple countries.
• Costly legal disputes and creditor claims.
• International probate complexities.
• Lengthy administrative processes.

A well-structured cross-border estate plan improves the likelihood that your assets are administered efficiently and in line with your wishes. It can also help reduce, though not eliminate, the risk of succession conflicts, forced heirship issues, overlapping tax charges, and family disputes.

Mapping Your Cross-Border Estate Exposure

Before implementing wills, trusts, or succession structures, HNW families and UK expats must first identify the factors that determine how their estate will be treated across jurisdictions.

International estate planning is shaped not only by where assets are held, but also by the legal connections that different countries use to assert taxing rights or govern succession.

These connecting factors commonly include:

• Tax residency.
• Long-term UK residence.
• Domicile or equivalent personal connecting factors used overseas.
• Nationality.
• Habitual residence.
• Asset situs.
• Beneficiary residence.
• Matrimonial or marital property regime.

Each of these can affect how your estate is taxed, administered, and distributed.

From 6 April 2025, the UK moved from a domicile-based inheritance tax framework for overseas assets to a long-term residence regime.

Individuals who have been a UK tax resident for at least 10 of the previous 20 tax years may be within the scope of UK inheritance tax on their worldwide estate, and exposure can continue for a period after leaving the UK depending on their residence history.

At the same time, a foreign jurisdiction may assert taxing rights over local property or apply its own succession rules based on asset location, nationality, or habitual residence.

This means that two estates of similar value can produce very different outcomes depending on how family members, wealth, and legal ties are spread internationally.

A robust cross-border estate plan therefore begins with a jurisdiction-by-jurisdiction review of where exposure arises before any structuring decisions are made.

Key Components of Estate Planning for International Families

A well-defined estate plan for wealthy UK expats and families includes a careful coordination of the following elements:

1. Domicile and tax residency.
2. Succession law and tax law interactions.
3. Jurisdiction-specific wills and powers of attorney.
4. Beneficiary designations.
5. Trusts, foundations, and insurance structures.

Domicile and Tax Residency

Understanding how domicile and residency affect your cross-border tax liabilities is vital for developing a tax-efficient international estate plan.

Some countries may impose tax on your estate based on your permanent home or domicile, while others may assess your long-term residence or citizenship to determine your tax obligations.

For instance, UK inheritance tax on overseas assets moved from a domicile-based regime to a long-term residence regime from 6 April 2025. Broadly, worldwide assets may fall within scope where an individual is treated as a long-term UK resident, regardless of common law domicile.

However, UK-situs assets remain relevant for UK inheritance tax regardless of long-term residence status.

Other countries, such as the US and Spain, also apply situs rules to certain country-linked assets. For example, the United States can impose estate tax on U.S.-situated assets owned by non-resident non-citizens. This can result in IHT liability overseas, regardless of where you reside, and lead to tax and estate-planning complexities.

Inadequate understanding of your global tax obligations can lead to missed estate structuring opportunities and non-compliance with relevant tax laws. Tax penalties and excessive tax rates can significantly erode your wealth, reducing the value of your estate for future generations.

Working with advisers at Titan Wealth International who coordinate legal, tax, and planning specialists across the relevant jurisdictions can help identify estate-planning options, implementation requirements, and potential tax exposure before assets are transferred.

This is particularly important for internationally mobile families navigating broader wealth solutions and tax strategies across multiple jurisdictions.

Succession Law and Tax Law Interactions

Succession law determines who inherits your estate, whereas tax law defines the amount of tax due on specific assets.

The interaction between the laws of your home country and the relevant foreign jurisdiction affects the distribution and taxation of your estate.

The UK generally allows broad testamentary freedom, whereas many other jurisdictions apply forced heirship or reserved-share rules that can limit how assets pass on death. These include:

• Spain.
• France.
• and, in some cases, certain Middle East jurisdictions (like the UAE) where succession outcomes depend heavily on the applicable local legal framework.

Holding assets in countries with forced heirship laws requires transferring a portion of your estate to specific beneficiaries, typically your spouse or children.

This can pose challenges in passing your global assets to the desired beneficiaries, unless you implement an effective international estate plan.

In addition to forced heirship, an overseas estate may be subject to inheritance or estate tax in the relevant foreign jurisdiction, particularly if it holds situs assets abroad. Depending on the country, taxes may apply to:

1. The beneficiary.
2. The estate.

For instance, the UK imposes a 40% IHT on estates exceeding the nil-rate band of £325,000, whereas France imposes succession tax on each beneficiary individually.

In France, transfers between spouses are generally exempt, while children are taxed on a progressive scale after available allowances, with marginal rates that can reach 45%.

Impact of Foreign Succession Rules on Global Estate Tax Obligations

To illustrate the impact of foreign succession laws on your cross-border estate tax liabilities, suppose you are a UK tax resident with assets in France.

Under French tax law, IHT applies to the estate recipient, and the applicable tax rate is determined based on your relationship to them.

While France imposes no IHT on asset transfers between spouses, children are subject to an IHT rate of up to 45%.

Having to pass certain assets to your children under forced heirship rules can therefore reduce the value of your estate due to substantial tax liabilities.

If, in the same scenario, you own situs assets in France, you may be exposed to double taxation. Under UK tax law, the same assets may also fall within the scope of UK inheritance tax depending on your residence status and the nature of the assets.

Cross-border estates can therefore face overlapping tax claims. Relief may be available under a double taxation convention or, in some cases, under unilateral relief rules, but this should be checked country by country rather than assumed.

Double Tax Treaties and Relief Planning

One of the most important features of international estate planning is recognising that succession coordination and tax relief are separate matters.

Even where your will or succession structure works as intended, more than one jurisdiction may still seek to tax the same asset or transfer.

This typically occurs where one country taxes based on residence, long-term residence, domicile, or nationality, while another taxes based on the location of the asset.

In those circumstances, cross-border estates can face overlapping inheritance or estate tax charges unless relief is available. In the UK, such relief may arise through a double taxation convention or, in some cases, through unilateral relief where no treaty applies.

This is particularly important for HNW families with foreign real estate, internationally held portfolios, or beneficiaries living in different jurisdictions.

Treaty availability varies significantly by country, and the existence of a tax treaty should never be assumed. Equally, the EU Succession Regulation does not govern inheritance tax, meaning that even where succession law issues are addressed, tax exposure may remain unresolved.

For this reason, an effective international estate plan should include a country-by-country review of treaty coverage, domestic relief rules, and the practical order in which taxes may arise. This is often essential to preserving family wealth and reducing the risk of unnecessary double taxation on death.

Forced Heirship and EU Succession Rules

Under the EU Succession Regulation, participating EU states generally apply the law of the deceased’s habitual residence by default.

However, a person may usually elect in their will for the law of their nationality to govern succession. For some UK nationals with EU-connected assets, this can help improve testamentary flexibility.

However, this does not remove the need to review local succession procedures, title-transfer requirements, and inheritance tax exposure.

The Regulation does not govern tax, and it does not automatically eliminate all local reserved-heir or public-policy risks.

Jurisdiction-Specific Wills and Powers of Attorney

In many cases, a UK will can remain valid for foreign assets, but that does not mean it is the most effective document for cross-border administration.

In jurisdictions such as Spain, France, and Portugal, local succession rules, probate procedures, and asset-transfer formalities may still affect how the will operates in practice.

For this reason, HNW families with a multi-jurisdictional asset base may benefit from separate coordinated wills, particularly where they simplify local administration or reduce delay.

However, multiple wills are not automatically required in every international estate plan, and they must be carefully drafted to avoid conflicting provisions or accidental revocation.

In most jurisdictions, including the UK, dying without a valid will may lead to your estate being distributed in line with intestacy laws. These laws typically prioritise your spouse and children as beneficiaries and may exclude other potential heirs from receiving an inheritance.

Note that holding a valid will in countries with forced heirship laws does not mean your estate will be divided according to the will.

In some jurisdictions, mandatory heirship rights may still override or constrain testamentary wishes, although careful planning may improve flexibility in certain cases.

In addition to wills, incapacity planning often involves establishing a Power of Attorney (POA). This document authorises a trusted individual to manage specified affairs during your lifetime if you lose capacity or need assistance.

It does not authorise that person to distribute your estate after death, as a power of attorney usually ends on death and estate administration then passes to executors or other personal representatives.

For internationally mobile HNW families, local recognition of foreign powers of attorney should be reviewed country by country. In some cases, separate local documents may be needed to improve practical enforceability with banks, registries, and other counterparties.

Professional guidance is essential when coordinating wills and powers of attorney across jurisdictions, particularly where local legal formalities, language requirements, and cross-border recognition issues affect implementation.

Beneficiary Designations

In cross-border estate planning, beneficiary designations can be just as important as wills and succession structures.

Certain assets may pass according to the contractual terms or governing rules of the arrangement rather than under the will itself. This is commonly relevant for:

• Life insurance policies.
• Pension arrangements.
• Some investment or custody accounts.
• Other assets held through structures that allow a named beneficiary or nominated recipient.

For HNW families and UK expats, this creates both planning opportunities and planning risks. A properly coordinated beneficiary designation may help speed up the transfer of value, improve liquidity for surviving family members, and support the wider succession plan.

However, if beneficiary designations are outdated, inconsistent with the will, or ineffective under local law, they can also create conflict, delay, or unintended distribution outcomes.

This is particularly important where family members live in different jurisdictions or where the wider estate includes trusts, foundations, or business interests.

In those situations, a designation that works administratively may still produce an outcome that is misaligned with the broader estate plan or creates adverse tax consequences in another country.

Beneficiary designations should therefore be reviewed alongside the rest of the estate structure rather than in isolation.

Key questions include:

• Whether the designation overrides or operates outside the will.
• Whether the asset passes through the estate or directly to the named beneficiary.
• Whether the designation remains valid after changes in marriage, divorce, residence, or family circumstances.
• Whether the relevant institution or jurisdiction recognises the designation as intended
• Whether the outcome is aligned with the family’s succession, liquidity, and tax-planning objectives.

For internationally mobile families, beneficiary designations are not merely administrative forms. They are part of the overall cross-border estate plan and should be checked regularly to ensure they remain legally effective and consistent with the intended distribution of wealth.

Trusts, Foundations, and Insurance Structures

A carefully designed international estate plan incorporates asset protection, asset control, and tax mitigation strategies.

This involves structuring assets within specialised vehicles that enable their transfer and management across jurisdictions.

Depending on the HNW family’s needs and circumstances, such structures may include the following:

Although trusts and foundations have similarities, they are distinct estate planning arrangements. Foundations are separate legal entities that maintain direct legal ownership of assets and manage them according to specific internal rules.

In contrast, a trust is not a separate legal entity but a legal relationship in which a trustee holds legal title to assets for the benefit of beneficiaries, who have an equitable interest rather than direct ownership.

HNW families with assets in civil-law countries may prefer foundations where formal governance and continuity are priorities.

Trusts may be attractive where control, staged access to wealth, and succession governance are key objectives, but tax efficiency should never be assumed without jurisdiction-specific advice.

Liquidity Planning for Tax and Estate Administration

For internationally structured estates, efficient succession is not only a legal issue but also a liquidity issue.

Even where assets ultimately pass to the intended beneficiaries, families may still face immediate cash demands arising from inheritance tax, succession tax, debt settlement, professional fees, property costs, or the administration of assets in more than one jurisdiction.

This challenge is particularly relevant for HNW families whose wealth is concentrated in illiquid holdings, such as property, private company shares, or long-term investment structures.

In these cases, heirs may need to fund tax liabilities and estate expenses before assets can be sold, transferred, or fully accessed.

Without proper planning, this can lead to distressed asset sales, delays in administration, or disputes between beneficiaries over how liabilities should be met.

Liquidity planning therefore forms a core part of a cross-border estate strategy. Depending on the structure of the estate, this may involve:

• Ring-fencing liquid reserves.
• Aligning asset ownership with expected liabilities.
• Or using insurance-based arrangements to provide cash at the point it is needed.

However, the tax treatment of trusts and insurance structures depends heavily on ownership, beneficiary designation, trust terms, and the laws of each relevant jurisdiction.

In the UK, certain trusts can fall within specific inheritance tax charging regimes, so tax outcomes should never be assumed.

For HNW families with multi-jurisdictional exposure, liquidity planning helps ensure that estate administration is not undermined by avoidable funding pressures at the very point when family members need clarity and continuity.

Common Cross-Border Estate Planning Issues for HNW Individuals

The primary challenges HNW families face when planning tax-efficient global estate distribution are double taxation and forced heirship laws. Additional complexities often include:

1. Multi-country probate administration.
2. Business succession continuity.
3. Family governance across generations.

Multi-Country Probate Administration

Probate is a legal process of distributing a deceased person’s estate, and it is typically required when one of the following applies:

• Someone passes away without a will.
• A property is held in the deceased person’s sole name.
• Certain assets or institutions require a grant or equivalent local authority before transfer can take place.

This is a costly process that can significantly reduce the value of your estate and expose details about your assets and heirs to the public. Holding cross-border assets prompts further complications, as your estate may be subject to probate in several countries, resulting in additional costs and delays.

Creating separate wills in relevant jurisdictions may assist in protecting your estate from multi-country probate. However, in some cases, probate is still required to confirm the validity of your will.

Jointly owned assets may pass differently depending on the form of ownership. For example, property held as joint tenants may pass by survivorship rather than under the will, although probate may still be needed for other parts of the estate.

For additional protection from probate, consider structuring your assets within pensions, and insurance policies.

Some assets held in these arrangements may pass outside the probate estate, but this depends on the structure, ownership, scheme rules, and local law.

Business Succession Continuity

HNW business owners, particularly those with companies operating across borders, face business continuity challenges without a clearly developed estate plan.

Business succession requires dedicated planning to streamline leadership transfer and ensure compliance with global laws.

An effective international business succession plan accounts for the following:

Family Governance Across Generations

In addition to standard estate planning strategies, HNW families with global assets must establish strong family governance to facilitate consistency in wealth management and preservation.

This involves creating a framework with clear family rules and shared family values by incorporating the following practices:

• Establishing a family council and organising family assemblies.
• Providing mentorship and education programmes to younger generations.
• Coordinating succession planning with global marital property regimes.

When family members reside across jurisdictions, family governance structures must also address different regulatory environments and inheritance laws to ensure long-term estate and financial planning continuity.