Around 300,000 British citizens live in Gulf states. Due to the evolving geopolitical situation in the region during early 2026, over 160,000 have registered their presence with the Foreign Office. Thousands are now back in the UK or considering a return.
If you are one of them, you face a serious and time-sensitive tax risk. Spending too many days in the UK before 5 April 2026 could make you UK tax resident for the entire 2025/26 tax year, bringing your worldwide income and capital gains into the UK tax net. An executive earning £400,000 in Dubai could face a UK tax bill exceeding £160,000.
This guide explains the rules, the reliefs available, and the practical steps you should take right now to protect your tax position. The Statutory Residence Test determines your UK tax residency. If you are unfamiliar with it, read that guide alongside this one.
Quick Summary: The UK Expat Tax Trap
What Is Happening Right Now
The evolving geopolitical situation in the Middle East during 2026 has led many British expats to leave the Gulf region. Many have returned to the UK to be with family. Others are weighing up their options.
The financial stakes are enormous. British nationals who have been living tax-free in Dubai could suddenly owe HMRC tens or even hundreds of thousands of pounds if they accidentally trigger UK tax residency.
Industry bodies including the Chartered Institute of Taxation and several wealth management firms have called on Chancellor Rachel Reeves to issue an emergency tax waiver, similar to the concessions HMRC granted during previous exceptional circumstances such as COVID-19. As of March 2026, no such waiver has been announced.
This situation is developing
HMRC may yet issue updated guidance or concessions. We will update this article as the position evolves. In the meantime, do not assume relief will be available. Plan on the basis of the current rules.
The 183-Day Rule: How UK Tax Residency Works
The Statutory Residence Test (SRT) determines whether you are UK tax resident for a given tax year. The simplest rule within the SRT is this: if you spend 183 days or more in the UK during a tax year (6 April to 5 April), you are automatically UK tax resident.
A "day" in the UK means being present at midnight. If you arrive in the UK at 11pm and leave before midnight, that does not count as a UK day (though HMRC can challenge this if done repeatedly).
Why This Matters for Gulf Expats
The 2025/26 tax year runs from 6 April 2025 to 5 April 2026. If you were living in Dubai and returned to the UK in, say, January 2026, you have already accumulated UK days. With the tax year ending on 5 April, there is very little room left.
Example: The Day Count Problem
Even if you stay below 183 days, the sufficient ties test can still make you UK tax resident. If you have a UK home, a spouse or partner in the UK, children in UK education, or UK employment, you could become tax resident with as few as 16 days in the UK. The more ties you have, the fewer days you need. Our full SRT guide explains each tie in detail.
| UK Ties | Days to Become Resident (was UK resident in prior 3 years) | Days to Become Resident (was NOT resident in prior 3 years) |
|---|---|---|
| 4 or more ties | 16+ days | 46+ days |
| 3 ties | 46+ days | 91+ days |
| 2 ties | 91+ days | 121+ days |
| 1 tie | 121+ days | 183+ days |
| No ties | 183+ days | 183+ days |
Source: HMRC Statutory Residence Test guidance (RDR3). Ties include: family tie, accommodation tie, work tie, 90-day tie, and country tie. See our SRT guide for detailed explanations.
HMRC Exceptional Circumstances Relief: What It Actually Covers
Under the SRT rules, HMRC can disregard up to 60 days spent in the UK if those days arise from "exceptional circumstances" beyond your control. On paper, this sounds like it was designed for exactly this situation. In practice, the bar is much higher than most people expect.
What Qualifies as Exceptional Circumstances
HMRC lists the following as potential qualifying events:
- War or civil unrest in the country you are trying to reach
- Natural disasters preventing travel
- Sudden illness or injury preventing you from travelling
- Travel restrictions imposed by government or public health authorities
The Critical Limitation
The relief only applies if you were genuinely prevented from leaving the UK. This is the part that catches people out. Being unable to return to your country of residence due to circumstances beyond your control is a qualifying circumstance. But once the immediate situation stabilises, or once you could travel somewhere other than the UK, HMRC's position is that the exceptional circumstances no longer apply.
Key distinction
Choosing to stay in the UK to be near family after the initial disruption is not the same as being prevented from leaving. HMRC will typically only disregard days where you had no realistic alternative. If commercial flights to other destinations were available, those days likely will not qualify.
The 60-Day Cap
Even if your circumstances qualify, HMRC will disregard a maximum of 60 days per tax year. If you arrived in the UK in January and have been here since, you may have already used up those 60 days with weeks still to go before 5 April.
Example: How the 60-Day Cap Works
At 61 effective days with UK ties (family, home), James could still be UK resident under the sufficient ties test. With 3 or more ties and prior UK residence, the threshold is just 46 days.
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Book a call with Alto Accounting. We specialise in cross-border tax for UK expats in the Gulf and can assess your SRT position before the 5 April deadline.
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Capital Gains Tax: The Temporary Non-Residence Trap
Even if you manage to avoid income tax by staying below the residency thresholds, there is a separate risk around capital gains tax (CGT) that many expats overlook.
Under HMRC's temporary non-residence rules, if you leave the UK, sell assets (shares, property, a business) while non-resident, and then return to the UK within five full tax years, those capital gains can be "brought back" into the UK tax net. They become taxable in the year you resume UK tax residence.
What This Means in Practice
Example: CGT on Return
The temporary non-residence rules apply to gains on most types of assets, including UK and overseas shares, investment funds, cryptocurrency, and business assets. The five-year clock starts from the tax year after the year you left.
If you left the UK in 2023/24, the five full tax years run from 2024/25 to 2028/29. Becoming UK resident again before 6 April 2029 would trigger these rules.
CGT Rates From April 2025
The capital gains tax regime changed significantly from April 2025:
- Basic rate: 18% (residential property and other assets)
- Higher rate: 24% (residential property and other assets)
- Business Asset Disposal Relief (BADR): 14% in 2025/26, rising to 18% from April 2026
- Annual exempt amount: £3,000
The New Inheritance Tax Rules for Expats
From April 2025, HMRC replaced the old domicile-based system with a residence-based test for inheritance tax (IHT). This affects returning expats in two ways.
First, if you have been UK tax resident for 10 or more of the previous 20 tax years, your worldwide estate falls within the scope of UK IHT at 40%, regardless of where you currently live. For many Gulf expats who lived in the UK for decades before relocating, this means IHT exposure persists even while abroad.
Second, if you return to the UK and resume tax residency, the clock on the new 10-year test resets. Any assets you hold globally become potentially subject to 40% IHT from the point you become resident.
The old strategy of changing domicile to escape IHT no longer works under the new rules. If you have substantial assets, IHT planning should be a priority. Read more about tax planning for directors in our pension contributions guide, as pensions remain outside the IHT estate.
National Insurance Changes From April 2026
There is an additional deadline that affects expats regardless of whether they return. From 6 April 2026, voluntary Class 2 National Insurance contributions will no longer be available for periods spent living or working abroad. From the 2026/27 tax year onwards, only the more expensive Class 3 contributions will be available.
| NI Class | Weekly Rate 2025/26 | Available to Expats From April 2026? |
|---|---|---|
| Class 2 (voluntary) | £3.45/week | No (ending) |
| Class 3 (voluntary) | £17.45/week | Yes (only option) |
If you want to protect your UK State Pension entitlement while living abroad, paying voluntary Class 2 contributions before 5 April 2026 is significantly cheaper than the Class 3 alternative. This applies to the current year and any backdated years you are eligible for.
5 Strategies to Protect Your Tax Position
If you are a UK expat who has returned or is considering returning from the Middle East, here are the practical steps to consider.
Count your UK days immediately
Use our SRT Day Counter to work out exactly how many days you have spent in the UK during the 2025/26 tax year. Check flight records, passport stamps, and any digital records. Every day matters.
Count days from 6 April 2025. Include UK holiday visits, family trips, and any days you arrived back before the current situation. Then calculate how many days remain until 5 April 2026.
Assess your UK ties
The sufficient ties test matters as much as your day count. Work through the five ties: family (spouse/children in UK), accommodation (available UK property), work (40+ days working in UK), 90-day tie (spent 90+ UK days in either of prior two tax years), and country tie (present in UK at midnight more than any other country).
If you have 3 or more ties and were UK resident in any of the prior 3 tax years, you could become tax resident with just 46 days in the UK. Our SRT guide explains each tie.
Consider relocating to a third country
If you cannot return to your Gulf residence but want to avoid triggering UK residency, relocating temporarily to a third country (Ireland, Portugal, France, Cyprus) can stop the UK day count.
Be aware that the third country's own tax rules apply. EU countries generally have a 183-day residency threshold too. Get professional advice before choosing a destination, as the wrong choice could create tax obligations in two jurisdictions.
Document everything for HMRC
If you plan to claim exceptional circumstances relief, you need a watertight paper trail. Keep records of FCO travel advisories, cancelled flights, embassy communications, and any evidence showing you were unable to leave the UK.
HMRC will examine each day individually. Save screenshots of government travel warnings, airline cancellation confirmations, and any correspondence showing you tried to leave. The burden of proof is on you.
Do not sell assets until you have taken advice
If you are considering selling investments, property, or business interests, pause. The timing of disposals relative to your tax residency status can create or avoid massive tax liabilities.
Selling assets while non-resident might seem smart, but the temporary non-residence rules could claw those gains back if you resume UK residence within five years. Conversely, if you are about to become UK resident, certain reliefs like the annual exempt amount and Business Asset Disposal Relief may apply. Get advice first.
Split Year Treatment: A Partial Shield
If you do become UK tax resident for 2025/26, split year treatment may limit the damage. Under the SRT, if you meet certain conditions, the tax year can be divided into a "non-resident part" and a "resident part". You are only taxed on worldwide income arising during the resident part.
For someone returning to the UK mid-year, Case 4 (starting to have a home in the UK) or Case 5 (starting full-time work in the UK) of the split year rules are the most likely to apply. The conditions are complex, but the key benefit is that foreign income earned before your UK arrival date is not taxed in the UK.
Split year treatment does not help with the temporary non-residence CGT rules. Those gains become taxable regardless of whether the year is split. To claim split year treatment, you must file a UK Self Assessment return with the SA109 supplementary pages. See our Self Assessment guide for Dubai expats for details on how to file.
What the Tax Bill Could Look Like
To illustrate the real cost of accidentally becoming UK tax resident, here are two scenarios based on typical Gulf expat profiles.
Scenario A: Senior Employee
Dubai-based UK national, £250,000 salary, no assets sold while abroad.
With split year treatment, only income from the UK-resident portion would be taxable, potentially reducing this significantly.
Scenario B: Business Owner
DMCC free zone consultancy. £400,000 income. £200,000 gain on shares sold in Dubai.
The CGT liability applies even with split year treatment. The five-year temporary non-residence rule operates independently.
These figures assume no split year treatment and no exceptional circumstances relief. In practice, one or both may apply, reducing the liability. But the point stands: the potential exposure is enormous, and professional advice before the 5 April deadline is not optional.
The Temporary Repatriation Facility
One piece of good news for returning expats: the Temporary Repatriation Facility (TRF) allows foreign income and gains accumulated before 6 April 2025 to be brought into the UK at a flat 12% tax rate during 2025/26 and 2026/27.
This was introduced as part of the abolition of the old remittance basis for non-domiciled individuals. If you have foreign income or gains sitting offshore from before April 2025, the TRF could be a way to bring that money into the UK at a much lower rate than the standard income tax or CGT rates.
The TRF is time-limited. After 2026/27, the rate increases for the final year of the facility. If you think this applies to you, speak to a cross-border tax adviser before the window closes.
UK Rental Income and Property
Many Gulf expats retain UK property, either renting it out or keeping it available. If you own UK rental property, you already have UK tax obligations under the Non-Resident Landlord Scheme, regardless of your residency status.
Returning to the UK does not change your rental income obligations, but it does change the reporting. As a UK resident, your worldwide rental income (not just UK property) becomes taxable. Any overseas rental income that was previously outside the UK tax net is now in scope.
If you kept your UK home available while in Dubai, this also counts as an "accommodation tie" for the SRT, making it easier to become resident with fewer UK days. If the property was rented out on a commercial let, the tie may not apply. Check the specific conditions carefully.
Frequently Asked Questions
I have been in the UK since January. Am I already tax resident?
Not necessarily. UK tax residency is determined at the end of the tax year (5 April), not on a rolling basis. What matters is your total UK days for the full 2025/26 tax year and how many ties you have. If you arrived in mid-January and stay until 5 April, that is roughly 80 days. Whether this makes you resident depends on your ties and whether you were UK resident in any of the prior three tax years. With 3+ ties and prior residence, 46 days is enough. Without prior residence and minimal ties, you may be safe. Count your days and ties precisely.
Does HMRC count arrival and departure days?
A UK day is counted if you are present in the UK at midnight. So the day you arrive counts (assuming you are still here at midnight), but the day you depart does not (assuming you leave before midnight). There are anti-avoidance rules: if you are in the UK at midnight and leave the next day, and do this more than three times in a tax year while otherwise qualifying as non-resident under the third automatic overseas test, those days start counting. The safest approach is to count conservatively and include any borderline days.
Will HMRC grant a blanket COVID-style waiver for Gulf expats?
As of March 2026, HMRC has not announced a blanket waiver. During COVID, HMRC issued specific guidance confirming that days stuck in the UK due to travel restrictions would qualify as exceptional circumstances. Industry bodies are calling for similar treatment for expats affected by regional instability. HMRC has updated its guidance to acknowledge that certain geopolitical events can constitute exceptional circumstances, but has not confirmed automatic relief for all returning Gulf expats. You should not rely on a waiver being issued. Plan on the basis of the current rules and claim exceptional circumstances on a case-by-case basis if applicable.
What if I can fly back to Dubai but choose not to?
If commercial flights are available and the FCO is not advising against travel, choosing to stay in the UK is unlikely to qualify as an exceptional circumstance. HMRC's test is whether you were prevented from leaving, not whether it was inconvenient or concerning. This is the key distinction that catches many people. If flights to your Gulf destination are running but you prefer to wait until the situation is calmer, those days will likely count as UK days. Consider travelling to a third country instead to stop the UK day count.
What about my UAE free zone company?
If you run a company in a UAE free zone and become UK tax resident, your company itself is not affected (it remains a UAE entity). However, any income you draw from it, dividends, salary, or management fees, becomes taxable in the UK. If you control the company, HMRC may also look at the Controlled Foreign Company (CFC) rules, which can attribute the company's profits to you as a UK resident. Additionally, UAE corporate tax obligations on the entity continue regardless of where you live.
Do I need to file a UK Self Assessment return?
If you become UK tax resident for 2025/26, yes. You will need to file a Self Assessment return including the SA109 residence pages. Even if you successfully claim split year treatment, you must file to make the claim. If you have UK rental income, you should already be filing. See our Self Assessment guide for Dubai expats for the full filing process and deadlines.
Can I go to Ireland to stop my UK day count?
Yes, many expats are doing exactly this. Ireland is a popular choice because UK citizens have unrestricted right to live and work there under the Common Travel Area agreement. You do not need a visa. However, Ireland has its own tax residency rules: you become Irish tax resident if you spend 183 days in Ireland in a calendar year, or 280 days over two consecutive years. For a short stay to bridge the gap until 5 April, Ireland is generally a workable option. France, Portugal, and Cyprus are also being used. Get advice on the specific tax implications of whichever country you choose.
What about my UK state pension?
Your UK State Pension entitlement depends on your National Insurance record. You need 35 qualifying years for the full new State Pension (currently £221.20 per week). While living abroad, you can pay voluntary NI contributions to fill gaps. From 6 April 2026, the cheaper Class 2 voluntary contributions (£3.45/week) are being discontinued for overseas residents. After that date, you can only pay Class 3 at £17.45/week. If you have gaps in your NI record, paying Class 2 contributions before 5 April 2026 is significantly cheaper. Check your NI record on GOV.UK and pay any shortfall now.
What if I sold my business while living in Dubai?
If you sold a business or shares while non-resident and return to the UK within five full tax years, the gain could be taxable under the temporary non-residence rules. Business Asset Disposal Relief (BADR, formerly Entrepreneurs' Relief) may still apply, reducing the CGT rate to 14% (2025/26) or 18% (from April 2026) on the first £1 million of qualifying gains. However, whether BADR applies depends on your specific circumstances and whether you met the qualifying conditions at the time of sale. This is one area where getting it wrong costs tens of thousands of pounds. Speak to a tax adviser before your residency status changes.
How do double taxation agreements help?
The UK has a double taxation agreement (DTA) with the UAE, but it is limited in scope compared to most UK treaties. The UAE does not charge income tax, so there is no foreign tax to offset against your UK liability. The DTA primarily covers oil and gas profits and airline/shipping income. For most returning expats, the DTA provides minimal benefit. If you also have income from a third country that does charge income tax, the relevant DTA between the UK and that country may provide relief. Each situation is different, and the interaction between multiple jurisdictions requires specialist advice.
Get Expert Help Before 5 April
If you are a British expat who has returned or may return from the Middle East, the decisions you make in the next three weeks could save or cost you tens of thousands of pounds. The interaction between the SRT, exceptional circumstances, temporary non-residence rules, and the new IHT regime is genuinely complex.
Alto Accounting specialises in cross-border tax for UK expats in the Gulf. We can assess your SRT position, calculate your day count and ties, advise on whether exceptional circumstances relief applies to your situation, and help you file the correct returns. We also advise on UK rental income, UAE free zone structures, and salary and dividend planning.
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