Advanced Taxation (UK) · Income tax: the scope of income tax, residence and overseas aspects

Domicile and Deemed Domicile for UK Tax (ATX-UK)

Updated 11 October 2026 · Fact-checked

Domicile is your permanent home in law, not where you live now. Deemed domicile treated long-term UK residents as UK domiciled for tax. The UK is moving to residence-based rules, where long-term residence (10 of the last 20 tax years) decides whether worldwide assets fall within inheritance tax. Apply the test the question gives.

Understand Domicile and Deemed Domicile Status

Residence asks where you spend your time. It is decided by the statutory residence test (days in the UK and UK ties). Domicile is a general law idea. It is the country you treat as your permanent home. You get one at birth, normally from your father, and you can change it only by genuinely settling in another country with the intention to stay.

Why does it matter? A UK resident was always taxed on UK income and gains. The extra exposure was on foreign income, gains and assets. Historically, a non-UK domiciled person could use the remittance basis for foreign income and gains. Foreign assets of a non-UK domiciled person were outside inheritance tax (IHT) as excluded property.

Deemed domicile was a tax rule that treated someone as UK domiciled even though they were not so under general law. The older IHT tests looked at being UK domiciled in the previous three years, or being UK resident for 15 of the last 20 tax years.

The UK is moving from domicile-based to residence-based rules. For IHT the key concept is the long-term UK resident (LTR): broadly, someone UK resident in at least 10 of the 20 tax years immediately before the year in question. An LTR has worldwide assets within IHT. A person who is not an LTR has only UK assets chargeable. A leaver stays an LTR for a tail period after leaving: three years if resident for 10 to 13 years, rising by one year for each extra year of residence, up to a maximum of 10 years. For income tax and CGT, the remittance basis has been replaced by a regime for new arrivals who were not UK resident in the previous 10 tax years. In the exam, the question tells you which facts to use. Read the examinable documents for exactly which rules apply to your sitting, and do not mix the old and new tests.

The key skill is to separate three questions: is the person UK resident, are they domiciled or long-term resident, and what is the asset or income and where is it located.

Key rules to remember

Statutory residence test: days in UK (previously resident): Under 16 days: automatically not resident. 16–45: resident with 4+ ties. 46–90: 3+ ties. 91–120: 2+ ties. 121–182: 1+ tie. 183+: automatically resident; From the tax table given in the exam. Use it first, because residence comes before domicile or LTR.
Statutory residence test: days in UK (not previously resident): Under 46 days: automatically not resident. 46–90: resident with 4 ties. 91–120: 3+ ties. 121–182: 2+ ties. 183+: automatically resident; Fewer ties are needed for someone previously resident, so check which column applies.
Long-term UK resident (LTR) for IHT: UK resident in at least 10 of the 20 tax years immediately before the relevant tax year; Rule stated in outline. An LTR has worldwide assets within IHT. Use the exact test given in the question or examinable documents.
Tail after leaving the UK: 10–13 years' residence: 3 years. Then +1 year for each extra year of residence. Maximum 10 years; During the tail the leaver is still treated as an LTR for IHT.
Older deemed domicile tests (IHT): UK domiciled in the previous 3 years, or UK resident in 15 of the previous 20 tax years; Know these as background, since questions may refer to them. Do not apply them if the question uses the residence-based rules.
IHT rates and bands: Nil rate band £325,000. Residence nil rate band £175,000. Lifetime rate 20%. Death rate 40%; The residence nil rate band relates to a home passed to direct descendants. Use it only where the question suggests it applies.
Taper relief on death within 7 years: 3–4 years: 20% reduction. 4–5: 40%. 5–6: 60%. 6–7: 80%; It reduces the tax, not the value of the gift. Under 3 years: no reduction.

How to solve Domicile and Deemed Domicile Status questions

Use the same order every time. It stops you jumping to domicile when residence or the asset location decides the answer.

1Identify the tax in the requirement: income tax, CGT or IHT. The status that matters differs by tax.
2Establish UK residence for the year using the days and ties table. Note whether the person was previously resident.
3Work out domicile or long-term residence. Count the UK resident years in the relevant 20-year window, and check whether a tail period applies after leaving.
4Classify each asset or income source as UK or foreign. Foreign items only matter where the person is within the worldwide charge.
5Apply the rule: UK-sourced items are taxable. Foreign items are taxable only if the status brings them in, or on the arising basis where applicable.
6Compute the tax using the rates and bands in the exam tax tables, including taper relief and the nil rate band if relevant.
7State your conclusion in plain terms, and add any planning point, such as the effect of leaving the UK and the length of the tail.

Quickest way: Status first, then asset location

When to use it: Use this when the exam gives a short scenario and asks whether an individual is exposed to UK tax on overseas assets or income.

Write 'resident? LTR or domiciled? asset UK or foreign?' as three quick lines.
Count resident years in the last 20 and compare with 10, and with 15 if the older test is used.
If not within the worldwide charge, only UK assets are taxable. Stop there for foreign assets.
If within the charge, include everything, then apply the rates and reliefs.
Add one sentence on how long the exposure lasts after leaving.

Common mistakes in Domicile and Deemed Domicile Status

Treating residence and domicile as the same thing.
Both seem to be about 'where you live'.
Fix: Residence is tested by days and ties each year. Domicile is a permanent-home concept in law. Long-term residence is a count of years. State which one you are applying.
Using the old 15 of 20 deemed domicile rule when the question gives residence-based facts.
Students memorised the older rule and apply it automatically.
Fix: Read the requirement. Use the test the question and the examinable documents support, and name it in your answer.
Forgetting the tail after the individual leaves the UK.
Students stop at 'no longer resident, so not taxable'.
Fix: After leaving, check the years of residence and work out the tail. The leaver can remain within IHT on worldwide assets during it.
Taxing foreign assets of someone who is outside the worldwide charge.
Students see a large gift and calculate before checking status.
Fix: Check status and asset location first. If the foreign asset is excluded property, the transfer is outside IHT.
Miscounting years in the 20-year window.
The current year is included by mistake, or part-years are counted.
Fix: Count whole tax years immediately before the relevant year. List the years in a line so you can see them.
Applying taper relief to the gift or to the nil rate band.
Students confuse what is reduced.
Fix: Taper relief reduces the tax charged on the gift. First work out the tax at 40%, then reduce it by the taper percentage.

Worked examples

Example 1

Maria was UK resident for the tax years 2010/11 to 2019/20 inclusive (10 years) and has been non-resident since. She owns overseas shares. Assuming the residence-based IHT rules apply, explain whether the shares are within IHT if she gives them away (a) in the second tax year after she left and (b) five years after she left.

Show the solution

Years of residence: 10, so the tail after leaving is 3 years.
(a) In the second year after leaving she is within the 3-year tail. She is still treated as an LTR.
As an LTR, her worldwide assets are within IHT, so the overseas shares are not excluded property.
(b) Five years after leaving she is beyond the 3-year tail, so she is no longer an LTR.
As a non-LTR, her non-UK assets are excluded property, so the overseas shares are outside IHT.

Answer: (a) The gift of overseas shares is within the scope of IHT because she is still an LTR in the tail. (b) The gift is outside IHT because she is no longer an LTR and the shares are foreign.

Example 2

Raj is an LTR. Five years and six months before his death he made a gift of UK property worth £500,000. This was his only transfer, and annual exemptions are ignored. Calculate the IHT payable on the gift because of his death.

Show the solution

The gift was a potentially exempt transfer and became chargeable because he died within seven years.
Nil rate band £325,000 is available, as there were no earlier transfers.
Excess over the nil rate band: £500,000 − £325,000 = £175,000.
Tax at the death rate of 40%: £175,000 × 40% = £70,000.
The gift was made more than 5 but less than 6 years before death, so the taper reduction is 60%.
Tax after relief: £70,000 × (100% − 60%) = £28,000.

Answer: IHT payable on the gift is £28,000.

Exam tips

Show a short status conclusion before any numbers. Markers give credit for correct reasoning even if the figures slip.
Count residence years in a visible list. One miscount changes the whole answer.
Use the tax tables provided in the exam for rates, bands and taper relief. Do not rely on memory for these.
Explain the consequence in the client's terms, such as 'your overseas assets remain within IHT for another three years'. These are professional skills marks.
If the question mentions a leaver, always check the tail before concluding they are outside the charge.

Practice questions from Income tax: the scope of income tax, residence and overseas aspects

Domicile and Deemed Domicile Status: frequently asked questions

What is the difference between residence and domicile for UK tax?

Residence is tested each tax year using days spent in the UK and UK ties. Domicile is your permanent home in general law and is hard to change. Residence can change from one year to the next, domicile does not.

What is deemed domicile for UK tax purposes?

It was a rule that treated an individual as UK domiciled for tax even if they were not domiciled here in law. It was usually triggered by long UK residence. The UK is moving to residence-based tests, so check which rule your sitting examines.

What are the long-term UK resident rules for inheritance tax?

An individual is an LTR if resident in the UK in at least 10 of the previous 20 tax years. An LTR has worldwide assets within IHT. After leaving, a tail period keeps them within the charge for between 3 and 10 years, depending on their years of residence.

Does a non-UK domiciled person pay IHT on foreign assets?

Under the older rules, no, unless they were deemed domiciled. Foreign assets were excluded property. Under the residence-based approach the same exclusion applies to someone who is not an LTR.