When a loved one's estate involves assets in more than one country, the probate process becomes significantly more complex. Different countries may have different rules about who inherits, how property is transferred, and what taxes are owed. This guide explains how Irish probate law interacts with other jurisdictions and what you need to know if you are dealing with an international estate. For a broader overview of the probate process, see our complete guide to probate in Ireland.
Cross-border estates are among the most complex situations in Irish probate. They almost always require professional help — a solicitor with international experience, and often a tax advisor with cross-border expertise. This page gives you the knowledge to understand what is involved, ask the right questions, and avoid costly surprises.
Why cross-border estates are different
A domestic estate — where all assets, all parties, and the deceased's domicile are in Ireland — follows a single set of rules. A cross-border estate can involve the laws of two or more countries applying simultaneously to different parts of the same estate. This creates three distinct challenges.
First, different countries have different succession laws. Irish law may give a spouse a “legal right share” under the Succession Act 1965, while the law of another country may not recognise that right at all. Second, tax may be owed in more than one country on the same inheritance. Third, you may need to obtain a Grant of Representation in each country where assets are held.
Ireland and the EU Succession Regulation (Brussels IV)
The EU Succession Regulation (Regulation 650/2012), commonly known as Brussels IV, came into effect on 17 August 2015. It aims to simplify cross-border succession within the EU by allowing a single country's law to govern the entire estate and introducing a European Certificate of Succession.
Ireland did not opt into the EU Succession Regulation. Denmark also did not participate. This means the Regulation's unified succession rules, including the default rule that the law of the deceased's habitual residence applies to the entire estate, do not apply in Ireland.
Irish succession law continues to be governed by the Succession Act 1965 and traditional conflict-of-law rules. In practical terms, this means cross-border estates involving Irish assets cannot rely on a single European Certificate of Succession to deal with property here. A separate Irish Grant of Representation is required.
Which country's law applies? The situs rules
Since Ireland does not participate in Brussels IV, cross-border estates involving Irish assets follow traditional situs-based conflict-of-law rules. These rules determine which country's succession law governs different types of property.
The core distinction is between immovable property (land and buildings) and movable property (bank accounts, shares, personal possessions, and cash). The law of the country where immovable property is located governs succession to that property. The law of the deceased's domicile at death governs succession to movable property.
Immovable property (land, buildings)
Where the property is physically located
Irish law governs succession to Irish land, regardless of domicile
Movable property (bank accounts, shares, cash)
Country of the deceased's domicile
Governed by the law of domicile — not necessarily where the asset is held
Shares in a company
Where the company's share register is maintained
US-listed shares are typically sited in the US for estate tax purposes
Life insurance policies
Country of the deceased's domicile (movable property)
Proceeds may still be subject to CAT if the beneficiary is Irish-resident
How situs rules determine which country's law applies to different assets
| Property type | Situs (location for legal purposes) | Practical effect |
|---|---|---|
| Immovable property (land, buildings) | Where the property is physically located | Irish law governs succession to Irish land, regardless of domicile |
| Movable property (bank accounts, shares, cash) | Country of the deceased's domicile | Governed by the law of domicile — not necessarily where the asset is held |
| Shares in a company | Where the company's share register is maintained | US-listed shares are typically sited in the US for estate tax purposes |
| Life insurance policies | Country of the deceased's domicile (movable property) | Proceeds may still be subject to CAT if the beneficiary is Irish-resident |
This means different parts of the same estate may follow different countries' succession laws. An Irish person who owned a house in France and shares in New York would have three different legal regimes potentially applying to their estate: Irish law for Irish assets, French law for the French property, and US law for the shares.
Irish Grants for foreign-domiciled individuals
When a person dies domiciled outside Ireland but owns property here, an Irish Grant of Representation is still required to deal with the Irish assets. The Probate Office handles these applications, and there are additional documentation requirements beyond a standard domestic application.
The applicant must show entitlement under the law of the deceased's country of domicile. This typically means lodging a sealed and certified copy of the grant issued by the court in the country of domicile, together with a sealed and certified copy of the will (if any). If no foreign grant has been obtained, an affidavit of law from a lawyer practising in that jurisdiction is required instead.
Where the person entitled to apply under Irish law differs from the person entitled under the law of the deceased's domicile, the Probate Office may require an affidavit of law or may limit the grant to immovable property only. Applications from individuals residing outside Ireland are typically directed to the Dublin Probate Office.
Capital Acquisitions Tax on cross-border inheritances
Capital Acquisitions Tax (CAT) is Ireland's inheritance and gift tax, charged at a flat rate of 33%. For cross-border estates, the critical question is whether the inheritance falls within the charge to Irish CAT. Three independent conditions can trigger liability — satisfying any one of them is enough.
The disponer (person leaving the inheritance) is Irish-domiciled or ordinarily resident
Yes — worldwide assets are within scope
Even foreign property is taxable in Ireland
The beneficiary (person receiving) is Irish-domiciled or ordinarily resident
Yes — worldwide assets are within scope
Even foreign property received by an Irish-resident beneficiary is taxable
The property is situated in Ireland
Yes — regardless of domicile
Irish property is always within scope, even if both parties are non-resident
Neither party is Irish-domiciled/resident, and the property is abroad
No — outside scope
No Irish CAT liability arises
Any one condition is sufficient to bring the inheritance within the charge to Irish CAT
| Condition | CAT liability? | Explanation |
|---|---|---|
| The disponer (person leaving the inheritance) is Irish-domiciled or ordinarily resident | Yes — worldwide assets are within scope | Even foreign property is taxable in Ireland |
| The beneficiary (person receiving) is Irish-domiciled or ordinarily resident | Yes — worldwide assets are within scope | Even foreign property received by an Irish-resident beneficiary is taxable |
| The property is situated in Ireland | Yes — regardless of domicile | Irish property is always within scope, even if both parties are non-resident |
| Neither party is Irish-domiciled/resident, and the property is abroad | No — outside scope | No Irish CAT liability arises |
The tax-free thresholds depend on the relationship between the disponer (the person leaving the inheritance) and the beneficiary (the person receiving it). These thresholds are cumulative — they include all gifts and inheritances received in the same group since 5 December 1991.
Group A
Child, minor child of a predeceased child
€400,000
Group B
Sibling, niece, nephew, grandchild, grandparent, parent (in certain cases)
€40,000
Group C
All other relationships (including strangers)
€20,000
CAT thresholds effective from 2 October 2024. CAT is charged at 33% on amounts above the threshold.
| Group | Relationship | Tax-free threshold |
|---|---|---|
| Group A | Child, minor child of a predeceased child | €400,000 |
| Group B | Sibling, niece, nephew, grandchild, grandparent, parent (in certain cases) | €40,000 |
| Group C | All other relationships (including strangers) | €20,000 |
For cross-border estates, the interaction of these rules can be surprising. An Irish-resident beneficiary who inherits property in Australia, for example, is liable to Irish CAT on that inheritance even though the property is not in Ireland — because the beneficiary's Irish residence brings it within scope.
The five-year rule: deemed domicile for CAT
Domicile is a legal concept that broadly means your permanent home — the country you consider your real home and intend to remain in. It is different from residence, which is based on physical presence. A person can be resident in Ireland without being domiciled here.
However, if you have been resident in Ireland for five consecutive tax years, you become “deemed domiciled” in Ireland for CAT purposes. This means you are treated as Irish-domiciled and liable to CAT on worldwide inheritances and gifts — not just property situated in Ireland.
Double taxation: when two countries tax the same inheritance
When an inheritance is taxable in both Ireland and another country, double taxation can arise. Ireland addresses this through bilateral treaties and unilateral relief. However, Ireland has inheritance tax treaties with only two countries: the United Kingdom and the United States.
United Kingdom
CAT (Ireland) and Inheritance Tax (UK)
Credit for tax paid, based on the lower of the UK or Irish effective rate
United States
CAT (Ireland) and federal estate tax (US)
Credit for federal estate tax paid. Does not cover US state taxes or gift tax
All other countries
Unilateral relief only
Ireland gives credit for foreign tax paid on the same property, but no treaty framework applies
Ireland's inheritance tax treaty network is limited to the UK and US
| Country | Treaty covers | How relief works |
|---|---|---|
| United Kingdom | CAT (Ireland) and Inheritance Tax (UK) | Credit for tax paid, based on the lower of the UK or Irish effective rate |
| United States | CAT (Ireland) and federal estate tax (US) | Credit for federal estate tax paid. Does not cover US state taxes or gift tax |
| All other countries | Unilateral relief only | Ireland gives credit for foreign tax paid on the same property, but no treaty framework applies |
The Ireland–US treaty deserves particular attention. It covers only federal estate tax — not gift tax, and not death duties imposed by individual US states. Since some US states levy their own estate or inheritance taxes, there may be no treaty relief available for those state-level taxes. The treaty also includes situs rules that determine where different types of property are considered to be located for the purposes of allocating taxing rights.
The Ireland–UK treaty covers CAT in Ireland and Inheritance Tax in the UK. Relief is given as a credit for the tax paid in the other country, calculated at the lower of the UK or Irish effective tax rate. The credit cannot exceed the Irish tax payable. Since Brexit, the UK is no longer in the EU, but this bilateral treaty remains in force and continues to operate independently of EU membership.
For all other countries — including major economies like Germany, France, Australia, and Canada — no bilateral inheritance tax treaty exists. Unilateral relief may be available where the same property is taxed in both Ireland and the other country, but the mechanism is less comprehensive than treaty relief. This gap in Ireland's treaty network is one of the most common sources of unexpected tax bills in cross-border estates.
Common cross-border scenarios
Cross-border estates come in many forms. These are the situations we see most frequently, and each creates its own set of challenges.
Irish resident inheriting foreign assets
When an Irish-domiciled or ordinarily resident person inherits assets located abroad, Irish CAT applies to the full value of the inheritance above the relevant threshold. The beneficiary may also be liable to tax in the country where the assets are located. Double taxation relief (treaty or unilateral) may reduce but not always eliminate the combined tax burden.
Foreign resident inheriting Irish assets
Irish property is always within the charge to CAT, regardless of the domicile or residence of the disponer or beneficiary. A person living abroad who inherits Irish land, shares in an Irish company, or funds in an Irish bank account may owe Irish CAT on those assets. They will also need to obtain or reseal a Grant of Representation through the Irish Probate Office. Resealing means the Irish Probate Office formally recognises a grant already issued by a foreign court, so you do not need to apply from scratch.
Irish person with property in another country
An Irish-domiciled person who owns property abroad creates a cross-border estate on death. Succession to foreign immovable property follows the law of the country where it is located, while movable property follows Irish law. A Grant of Representation may be needed in each country. CAT applies to the worldwide estate, and the foreign country may also levy its own inheritance or estate tax.
US shares in an Irish estate
US-listed shares are a particularly common cross-border issue. The US levies federal estate tax on US-sited assets owned by non-US persons, with a much lower exemption threshold than applies to US citizens. The Ireland–US double taxation treaty provides relief, but the interaction of US estate tax, Irish CAT, and potentially US state taxes requires careful professional analysis. Our guide to US shares in Irish estates covers this in detail.
UK assets after Brexit
Brexit did not change the Ireland–UK double taxation treaty, which continues to operate. However, the UK's departure from the EU means that the free movement of capital provisions no longer apply, and some administrative processes have changed. UK assets in Irish estates remain common — particularly property in Northern Ireland, UK bank accounts, and UK pension entitlements. Our guide to UK assets in Irish probate explains the post-Brexit position.
Revenue obligations for cross-border estates
The executor or administrator of an estate with cross-border elements has specific obligations to Irish Revenue. The Statement of Affairs (Probate) Form SA.2, filed through Revenue's myAccount or ROS portal, should include details of all assets, including those held outside Ireland, where the person who died was Irish-domiciled. This is per Revenue's CAT administration guidance.
Beneficiaries who receive inheritances above 80% of the relevant group threshold must file a CAT return (Form IT38), even if no tax is ultimately due after applying reliefs or double taxation credits. The pay-and-file deadline for CAT is 31 October. The valuation date is the date on which the inheritance becomes legally yours — for most inheritances it is the date of death. Where the valuation date falls between 1 January and 31 August, the deadline is 31 October in that same year. Where the valuation date falls between 1 September and 31 December, the deadline is 31 October in the following year (or the extended ROS deadline, where applicable).
For information about probate costs, including Probate Office filing fees and professional fees for cross-border work, see our costs guide. Cross-border estates typically involve higher professional fees due to the additional complexity of dealing with multiple jurisdictions.
When you need professional help
While some straightforward domestic estates can be handled without professional help, cross-border estates are a different matter. The interaction of multiple legal systems, tax regimes, and procedural requirements creates genuine risk of errors that can be costly or difficult to reverse. Professional advice is recommended whenever an estate involves any of the following.
- Assets located outside Ireland
- A deceased person who was domiciled outside Ireland
- Beneficiaries who are resident outside Ireland
- Property in a country with no inheritance tax treaty with Ireland
- US-listed shares or other US-sited assets
- A non-resident executor named in the will
- Potential interaction of Irish and foreign forced heirship rules
- The person who died had lived abroad for an extended period (domicile questions)
A solicitor with experience in cross-border probate can navigate the procedural requirements in each jurisdiction. A Chartered Tax Advisor with international experience — particularly in CAT and double taxation — can identify tax exposures and claim available reliefs. For more about executor duties and responsibilities, see our executor guide.
Cross-border guides
This pillar page covers the fundamentals of cross-border inheritance in Ireland. For detailed guidance on specific scenarios, see our in-depth guides:
- Inheriting US shares from an Irish estate
- UK assets in Irish probate: post-Brexit guide
- EU Succession Regulation (Brussels IV) for Irish estates
- Foreign tax obligations for Irish beneficiaries
- Non-resident executor: dealing with an Irish estate
- Irish person inheriting foreign property
- Double taxation on inheritance: Ireland's treaty network
- Cross-border estate planning: avoiding surprises