We have lived in various countries over the years and currently live in Austria, although we are also relocating to the US in July this year. As the others say, don't close a UK Bank account. You only need a £1 or so to keep it open anyway, plus it's handy for any interest which may accrue from other savings to be paid in. We always have British mastercards and service cards which we find very useful on trips home. We have kept our ISA's and will do so when we move to Colorado. Of course you need to declare any interest to the IRS but as far as we are concerned, they are small amounts anyway and I think you're entitled to earn a certain amount before paying tax.