British expats rushing home from the Gulf to escape the widening Iran conflict are now confronting an unexpected second crisis — potential tax bills from HM Revenue & Customs. Accountants say families who fled the region after the escalation involving Donald Trump’s Iran war could inadvertently trigger UK tax liabilities simply by returning home earlier than planned. Thousands of Britons have already left the Gulf or are preparing emergency departures as tensions escalate across the region. The five-year rule catching expats off guard Tax specialists warn many returnees risk falling foul of Britain’s “temporary non-residency” rules, designed to stop people leaving the UK briefly to avoid tax before coming back. If someone returns to Britain within five full tax years of leaving, certain gains made abroad — including profits from shares, businesses or investments — can suddenly become taxable in the UK. That could leave some expats facing significant Capital Gains Tax demands despite believing their finances were outside the UK system. Families fleeing war — not planning tax strategy Sandra Jeevan, partner at the accountancy firm UHY Hacker Young, said many families never intended to return this year but had little choice. “When you’re moving your family to safety, you’re not thinking about day-count rules or residence tests,” she said. A forced return could shift someone’s tax residency status overnight. Although HMRC guidance recognises war as an “exceptional circumstance”, advisers warn the exemption is narrow and may not apply once the immediate crisis passes. Exodus from a region under fire The tax scramble comes as tens of thousands of Britons flee Gulf states, particularly the United Arab Emirates, where large expatriate communities live and work. Around 140,000 UK nationals registered with the Foreign, Commonwealth & Development Office as officials prepared potential evacuation routes. In total, roughly 300,000 Britons were believed to be living, travelling or transiting in Gulf countries when the conflict began. Drone incidents near major sites including Dubai International Airport have heightened fears. Pressure grows for HMRC flexibility Tax advisers say the government must show flexibility as displaced families try to rebuild their lives back in Britain. For many expats, the fear now is that escaping a war zone could come with a costly financial sting — one that arrives long after the flights home. Britons who fled Gulf desperate to avoid tax bills after London return
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