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Why the UK Tax Year Still Matters for Inheritance Tax Even If You Live Overseas
Hoxton Blog • Why the UK Tax Year Still Matters for Inheritance Tax Even If You Live Overseas
Many internationally mobile families assume that once they leave the UK, UK Inheritance Tax (IHT) is no longer relevant.
It is not quite that simple.
From 6 April 2025, the UK changed how it decides whether someone’s overseas assets fall within the scope of IHT. Instead of focusing primarily on domicile, the rules now look at Long-Term UK Residence.
As a result, your past connection to the UK can continue to affect your estate planning, even if you now live abroad. This is why the UK tax year end on 5 April still matters. It is not just a date; the tax year closes. It can also serve as a useful checkpoint for reviewing your IHT position.
The Shift to Long-Term UK Residence
Under the rules that apply from 6 April 2025, a person will be treated as a Long-Term UK Resident for IHT purposes if they have been UK tax resident for:
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10 consecutive tax years, or
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10 or more tax years out of the previous 20
There is also a continuing period of exposure, often referred to as a “tail”, after a period of UK residence.
If you meet the Long-Term UK Residence test, your overseas assets may fall within the UK IHT net.
It is important to be clear about what this means in practice.
If you are treated as a Long-Term UK Resident for IHT purposes, your worldwide estate can fall within the scope of UK IHT.
If you are not treated as a Long-Term UK Resident, UK IHT generally applies only to your UK-situated assets.
This distinction is central to understanding your potential exposure. Your residence history determines whether UK IHT is limited to UK assets or extends to assets held globally.
This means that leaving the UK does not automatically remove exposure. Your history of UK residence becomes a key factor.
For example, someone who spent many years living and working in the UK before moving overseas may still be within the UK IHT framework, depending on how long they were resident and when they left.
The “Tail” After Leaving the UK
One of the most important features of the new rules is that the effect of Long-Term UK Residence can continue for a period after you leave.
In some cases, a person can remain within scope for up to 10 tax years after departure, depending on how long they were UK resident beforehand.
This often comes as a surprise. A move overseas may change day-to-day life completely and tax residence is often acquired in another jurisdiction, but the IHT position may take longer to change.
There are also transitional provisions for certain individuals around the 2025 to 2026 tax year, which makes it even more important to review your specific timeline carefully.
The key message is that your IHT exposure is now linked to your pattern of residence over time, not simply where you live today.
Why 5 April Still Matters
IHT is often seen as something to think about later in life. In practice, effective planning usually happens gradually.
The end of the UK tax year on 5 April provides a natural moment to review a number of IHT-related decisions.
Annual Gifting Allowance
Each individual can usually give away up to £3,000 each tax year without that amount being added back into their estate for IHT purposes. If the allowance was not used in the previous tax year, it can generally be carried forward for one year.
If the allowance is not used by 5 April, it may be lost.
For families who remain within the UK IHT framework because of Long-Term UK Residence, this reset still matters. Small gifts made regularly over many years can reduce the size of an estate in a steady and manageable way. Local advice should however, always be sought as to any Estate Duty impact in that country.
Timing of Larger Gifts
Larger gifts require careful thought, particularly if you are assessing your potential Inheritance Tax liability.
If you give away assets during your lifetime, the timing of those gifts can directly affect how they are treated for IHT purposes. Reviewing your position before the end of the tax year allows you to understand how any planned gifts may alter the value of your estate and your potential exposure. This helps ensure decisions are deliberate and aligned with your wider estate planning strategy.
Lifetime Gifts and the Seven-Year Rule
Many lifetime gifts to individuals are classed as potentially exempt transfers. If you survive for seven years after making the gift, its value will usually fall outside your estate for IHT purposes.
If you die within seven years, the gift may still be brought back into the calculation when determining the IHT due on your estate. The amount of tax payable will depend on the value of the gift and how much of your available nil-rate band remains at the time of death.
If IHT is payable on the gift, taper relief may reduce the amount of tax due where the gift was made between three and seven years before death. Taper relief reduces the tax payable, not the value of the gift itself.
Moving Overseas and Ongoing Exposure
Leaving the UK does not reset the seven-year clock.
In addition, since 6 April 2025, exposure to UK IHT on non-UK assets depends on whether you fall within the Long-Term UK Residence rules. Broadly, individuals who have been UK resident for a sufficient number of tax years may remain within scope for a period even after leaving.
UK-situated assets can remain within the scope of UK IHT regardless of residence status.
Your residence history, the location of your assets, and the timing of any gifts all influence the outcome. Understanding these factors is essential when assessing your overall IHT liability, particularly if you are internationally mobile or considering relocation.
Where Inaction Can Increase Your IHT Liability
Inheritance Tax exposure often increases gradually rather than suddenly. Estates tend to grow over time through asset appreciation, retained income, and business growth. Without regular review, your potential IHT liability can rise without being immediately obvious.
This is particularly relevant for families who have moved abroad but retain UK connections. Understanding whether you remain within scope, and on which assets, is essential to assessing your true exposure.
Common situations that can affect your IHT liability include:
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Not using annual gifting allowances, meaning more value remains within the estate each year
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Postponing lifetime gifts that could otherwise reduce the size of the estate over time
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Retaining assets in structures that were appropriate under previous rules but may now fall within scope under the long-term residence framework
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Failing to update wills after changes in residence, asset base or family circumstances
Many families also continue to hold UK property, UK business interests or UK-based investments. These assets can remain within the scope of UK IHT regardless of where you currently live. In some cases, residence history may also mean that overseas assets are within scope.
None of these factors necessarily creates an immediate tax bill. However, over time, they can increase the value of the estate exposed to IHT or alter how reliefs and exemptions apply.
Regularly reviewing your position helps ensure you understand the scale of your potential liability, how it may evolve, and whether your current arrangements reflect your intentions.
Reviewing Wills and Estate Structures
A change in residence often brings wider changes in life. You may now hold assets in more than one country. Family members may live in different jurisdictions. Local succession rules may differ from those in the UK.
As the IHT framework has shifted to focus on long-term residence, it is important to review:
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Whether your will still reflects your current circumstances
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How UK and overseas assets are structured
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Who your executors and beneficiaries are
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Whether your overall estate plan remains aligned with your intentions
A will drafted while you were UK resident may not fully address your current position. Equally, an overseas will may not deal effectively with UK assets.
Regular reviews help ensure your estate planning keeps pace with changes in residence, legislation and family life.
Using the Tax Year as a Planning Checkpoint
For internationally mobile families, 5 April can serve as an annual reminder to revisit key questions:
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Do the long-term UK residence rules apply to me?
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Am I within scope on my worldwide estate or only my UK assets?
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Have I used my available gifting allowances this year?
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Are there lifetime gifts I intend to make?
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Does my will reflect where I live and where my assets are held?
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Are there UK-linked assets that need specific consideration?
IHT interacts with other areas of tax and cross-border rules. Coordinated advice can help ensure that decisions are consistent and support your wider financial objectives.
Planning With Clarity as Rules Evolve
Important Disclaimer
This article is for general information only and reflects UK legislation and HMRC guidance at the time of writing. Tax rules can change, and individual circumstances vary. Personalised advice should be sought before taking action.
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