What falls away and what follows you
The UK taxes people on residence, not nationality. Become non-resident under the Statutory Residence Test and UK tax on your Bahrain salary and most foreign income and gains falls away; because Bahrain has no personal income tax, employment income can end up taxed nowhere. What does not fall away is UK-source income. UK rental profits stay taxable under the Non-Resident Landlord Scheme, certain UK pensions remain within the UK net, and if you sell UK residential property you must file a Non-Resident Capital Gains Tax return and pay within 60 days of completion, with residential gains taxed at 18% or 24%. There is a UK to Bahrain double taxation agreement, effective in the UK from 6 April 2013, but it does little day-to-day work precisely because Bahrain has no personal income tax to relieve.
Leaving cleanly is the whole job
Residence is decided by the SRT sequence of automatic overseas tests, automatic UK tests and the sufficient ties test, so the more ties you keep (available accommodation, a UK-resident spouse or minor children, UK work), the fewer UK days you get. For a mid-year move, split-year treatment can divide the departure year so Bahrain earnings after you leave are not taxed as if you were resident all year, but you must meet a specific case; it is not automatic. Keep a detailed day-count and travel log and tell HMRC you have left, typically via the P85 or your final return, because the burden of proving non-residence sits with you.
The two long tails: inheritance tax and the five-year trap
UK inheritance tax is now residence-based: if you were UK resident for at least 10 of the last 20 tax years, your worldwide estate can stay in scope for a tail of 3 to 10 years after departure. And if you might come back, plan around the temporary non-residence rules: return within five full tax years, having been UK resident in at least four of the seven years before leaving, and gains realised while in Bahrain can be taxed in your year of return. Horizon handles the UK side of Gulf moves to a fixed fee agreed upfront, with non-resident returns from £550; book a free clarity call at /book before you set a departure date.
