Returning to the UK from the Gulf? Tax implications expats need to know

As tensions rise in the Gulf, many British expats are weighing their next move. Some are delaying a return to the UK to avoid tax exposure, while others are temporarily relocating to countries like Ireland or France. 

Around 300,000 Britons live in the Gulf, with around 160,000 having registered with the Foreign Office since the outbreak of war. For high-earning expats, even a short return could trigger UK tax residency for the 2025/26 or 2026/27 tax year, creating significant and often unexpected liabilities.

UK tax residency: Why a short stay can be costly

For expats living in the Middle East, returning to the UK can quickly change your tax position. In some cases, spending as little as 45 to 120 days in the UK may be enough to trigger tax residency.

Key risks to be aware of include:

• Exceeding your UK day count and becoming tax resident
• Having already used most of your allowance this tax year
• Bringing your global income and gains into the UK tax net

Your position is determined by the Statutory Residence Test, which takes into account:

• Family ties in the UK
• Access to accommodation
• Work or business connections
• Previous UK residence

Timing your return: Why the tax year-end matters

With the UK tax year ending on 5 April, timing can make a meaningful difference.

Some expats are choosing to delay their return to:

• Stay within non-resident thresholds
• Avoid bringing foreign income into the UK tax net
• Start the new tax year with a more efficient structure

If you are returning now, understanding your position before and after 5 April is essential.

The five-year rule: A hidden risk for offshore gains

If you have left the UK in recent years, returning could have implications beyond income tax.

Under the temporary non-residency rules

• Returning within five full tax years may trigger UK tax
• Certain capital gains realised while abroad can be taxed on your return

Who should be cautious?

• Business owners who sold companies
• Investors who realised significant gains while non-resident

Exceptional circumstances: Limited relief

HMRC allows up to 60 days to be disregarded in cases such as war or civil unrest.

However, this relief is strictly applied and often limited in practice.

Important considerations:

• You must show your return was unavoidable
• Travel must be effectively impossible, not just unsafe
• Official advice typically needs to indicate “no travel”
• Additional days or working in the UK may invalidate relief

Emergency returns: What happens next

Returning to the UK unexpectedly can trigger:

• A change in tax residency status
• New filing and reporting obligations
• Exposure of foreign income and investments to UK tax

In some cases, split-year treatment may apply, allowing part of the year to be treated as non-resident. However, this requires careful planning and correct filing.

Can a tax treaty protect you?

If you become UK tax resident, the UK–UAE Double Tax Treaty may help manage your position.

It can:

• Determine where you are treated as tax resident
• Potentially protect UAE-sourced income from UK taxation

However, this is not automatic. It requires technical analysis, correct structuring, and formal claims. Mistakes can lead to disputes or additional tax exposure.

Why cross-border tax advice matters now

The current situation highlights how quickly circumstances can change, and how easily tax exposure can follow.

With the right advice, you can:

• Manage your UK tax residency position
• Protect offshore income and capital gains
• Avoid retrospective tax liabilities
• Stay compliant across jurisdictions

Whether your return is planned or unavoidable, early advice can make a significant difference. Speak to our cross-border specialists today by email us at [email protected] or calling +44 (0) 20 7759 7514 (UK).