Choosing the right will is one of the most consequential financial decisions a UK expat can make – and one of the most frequently delayed. The types of wills for expats expats are not identical to those available to UK residents, and the stakes are considerably higher. When your assets span multiple jurisdictions, your family may live in a different country to your pension, and the laws governing your estate could differ entirely depending on where you die versus where you lived, the wrong document – or no document at all – can cost your beneficiaries years of legal complexity and a significant portion of what you intended to leave them.

 

This guide breaks down the most common types of wills, explains where each one fits, and outlines the considerations that matter most if you are a British national living abroad.

 

Why the Type of Will You Choose Matters More as an Expat

For UK residents with straightforward estates, the choice of will type is relatively uncomplicated. For expats, it rarely is.

 

The moment you establish residency abroad, you introduce a layer of legal complexity that a standard domestic will is often not equipped to handle. Succession laws vary significantly by country. Some jurisdictions – including many in Continental Europe and parts of the Middle East – apply forced heirship rules, which means a portion of your estate must pass to specific relatives regardless of what your will says. Others may not recognise a UK-drafted will at all without specific wording or formal authentication.

 

The EU Succession Regulation (Brussels IV), which the UK is no longer bound by post-Brexit, previously allowed EU-based expats to elect for their home country’s law to govern their estate. Many UK expats in Europe now need to proactively address this in their wills. Similarly, expats in Hong Kong, Singapore, the UAE, or elsewhere face their own distinct legal landscapes.

 

The point is this: the type of will you choose is not just a structural preference. For expats, it is a legal and financial strategy.

 

The Main Types of Wills for Expats

Simple Will

A simple will is the most widely used document for estates without significant complexity. It appoints an executor to administer your affairs, names your beneficiaries, specifies how your assets should be distributed, and – if you have minor children – designates a guardian.

 

For expats, a simple will can be entirely appropriate if your estate is concentrated in a single jurisdiction, your family situation is uncomplicated, and there are no cross-border trust structures or business interests at play. It is also frequently used as a starting point, with more sophisticated arrangements layered on top as wealth grows.

 

The key limitation is that a simple will offers limited control over how and when beneficiaries receive their inheritance. If you have young children, dependents with additional needs, or concerns about how a beneficiary might manage a large sum, a simple will on its own is unlikely to be sufficient.

Testamentary Trust Will

A testamentary trust will incorporates a trust directly into the will itself. The trust only comes into existence upon your death, at which point the assets you have designated are transferred into it and managed by a trustee according to the terms you have set out.

 

This is particularly relevant for expats with young children or dependents who may not be ready – financially or otherwise – to receive a large inheritance outright. You can stipulate that funds are released at a specific age, in stages, or for specific purposes such as education or housing. The trustee manages the assets in the interim.

 

For UK expats, testamentary trusts also offer a degree of protection against the forced heirship provisions in some jurisdictions, though this depends heavily on where your assets are held and the applicable local law. This is an area where specialist advice is essential.

 

It is worth noting that a testamentary trust does not avoid probate in the way a living trust does. The will itself must still go through the probate process before the trust is activated.

Mirror Wills

Mirror wills are two separate but nearly identical documents, typically drafted by spouses or civil partners. Each leaves their estate to the surviving partner first, with a secondary bequest – usually to children – if the other partner has already died.

 

They are one of the most common arrangements for couples and can work well for expat families with relatively aligned estate goals and similar asset profiles. However, the critical point to understand is that mirror wills are legally independent documents. The surviving partner is under no legal obligation to maintain the terms of the original will after the first partner dies. They are free to change their own will entirely.

 

For expats with blended families, complex inheritance intentions, or children from previous relationships, this flexibility can become a vulnerability. If protecting a specific inheritance outcome for your children – regardless of what happens after your death – is a priority, you may need to consider a different structure.

Mutual Wills

Mutual wills are similar in structure to mirror wills but include a legally binding agreement between both parties not to alter the will after the first death. They are considerably less flexible than mirror wills and have largely fallen out of favour with estate planning practitioners.

 

The binding nature of a mutual will can create serious difficulties for the surviving partner – particularly if their financial circumstances, family situation, or tax position changes significantly. The legal enforceability of mutual wills also varies between jurisdictions, which adds a further layer of uncertainty for expats with assets in multiple countries.

 

For most expat couples, mirror wills or a combination of individual wills with carefully structured trust provisions will be a more practical and adaptable solution.

Pour-Over Will

A pour-over will is used alongside a living trust – a trust structure established during your lifetime rather than upon death. The purpose of the pour-over will is to act as a safety net: any assets that were not formally transferred into the living trust before your death are automatically “poured over” into the trust at the point of death, ensuring they are governed by its terms.

 

This type of will is common in US estate planning and is used by some UK expats with US connections or assets. It is less standard in UK-centric estate planning but can be relevant for expats with complex, multi-jurisdictional asset bases where a living trust already forms the centrepiece of the estate structure.

 

It is important to note that assets passing through a pour-over will are still subject to probate. The living trust itself avoids probate, but anything that passes through the will first does not.

Holographic Will

A holographic will is a document written entirely by hand and signed by the testator, without witnesses. Some jurisdictions recognise these as legally valid; many do not, or impose strict conditions on their acceptance by a probate court.

 

For UK expats, holographic wills represent a significant risk. The UK does not formally recognise holographic wills under English law. Their validity in other jurisdictions varies considerably. Even where they are legally recognised, they are frequently challenged and may require extensive judicial scrutiny to validate.

 

A holographic will should not be relied upon as a primary estate planning document. At most, it might serve as a temporary measure in exceptional circumstances – but even then, the absence of witnesses and formal drafting creates real vulnerability.

Living Will (Advance Directive)

A living will – more formally known as an advance directive – is categorically different from the other documents on this list. It does not govern the distribution of your assets. Instead, it sets out your wishes regarding medical treatment, life support, and resuscitation in the event that you become incapacitated and are unable to communicate those decisions yourself.

 

For expats, a living will is an important document that is often overlooked entirely. If you are living in a country where your family do not speak the local language, or where the default medical approach differs from your own preferences, having a properly drafted advance directive in place – ideally recognised in both your country of residence and the UK – can be critical.

 

It sits alongside your estate will rather than replacing it, and should be reviewed whenever your health circumstances or country of residence changes.

 

Key Questions Expats Should Ask Before Choosing a Will Type

Before settling on a structure, it is worth working through the following:

 

Where are your assets held? If your estate spans multiple countries – a UK property, a pension, investments held in Hong Kong or Singapore, a bank account in the UAE – you may need more than one will, each drafted in accordance with the local law of the jurisdiction where those assets sit. A single UK will does not automatically govern assets held abroad.

 

Which country’s succession law applies to you? This is not always straightforward. Domicile, residency, and nationality can all be relevant factors depending on the jurisdiction. Some countries apply their own succession law to any assets held within their borders, regardless of where you live or what your will says.

 

Do you have minor children or dependents with specific needs? If so, a simple will is unlikely to be sufficient. A testamentary trust will give you meaningful control over how and when your children receive their inheritance, and can include provisions that protect their interests if your estate is contested.

 

Is your family situation straightforward? Blended families, previous marriages, estrangements, and significant age gaps between partners all introduce complexity that a standard will may not be equipped to handle without careful drafting.

 

What are your inheritance tax obligations? UK domiciled individuals remain liable for UK inheritance tax on their worldwide estate, regardless of where they live. The structure of your will – particularly any trust provisions – can have a direct bearing on your IHT exposure and the efficiency with which your estate passes to your beneficiaries.

 

The Expat Mistake Most People Make

The most common estate planning error among UK expats is not choosing the wrong type of will. It is failing to update an existing one – or having none at all.

 

A will drafted in the UK before you left the country may no longer reflect your current asset base, family situation, or place of residence. It may contain provisions that are legally ineffective in your current jurisdiction, or that actively conflict with local succession law. Getting married abroad, having children, acquiring property in a new country, or changing your tax residency status are all events that can significantly alter the effectiveness of an existing will.

 

Estate planning for expats is not a one-time task. It is an ongoing process that should be reviewed whenever your circumstances change in any material way.

 

Where to Start

Understanding the types of wills available is the first step. The second is establishing which combination of documents is right for your specific situation – your assets, your family, your jurisdiction, and your long-term estate goals.

 

Carey Suen works with UK expats across Asia, the Middle East, and beyond to build estate plans that reflect the realities of international life, not just domestic convention. If you are unsure whether your current will is still fit for purpose – or you do not yet have one in place – our will tool is a good starting point.

 

Start your will review – use our free will tool

 

This article is intended for informational purposes only and does not constitute legal advice. Estate planning law varies by jurisdiction and individual circumstances. You should always seek qualified professional advice before making decisions about your estate.