If you open an ISA in the UK and then move abroad, you cannot put money into it after the tax year that you move (unless you’re a Crown employee working overseas or their spouse or civil partner). You must tell your ISA provider as soon as you stop being a UK resident. However, you can keep your ISA open and you’ll still get UK tax relief on money and investments held in it. You can pay into your ISA again if you return and become a UK resident (subject to the annual ISA allowance).