Sure, you're unlikely to be taxed twice, but there's still a high burden to having to file a US return every year. The cost of getting a US / UK accountant to

Sure, you're unlikely to be taxed twice, but there's still a high burden to having to file a US return every year. The cost of getting a US / UK accountant to do the most simple of returns will run you around $1000 in total (at least in the UK), and the costs increase dramatically as your taxes get complicated. That doesn't even get into things which aren't covered by the DTA, like ISA accounts in the UK. And worse it's extremely easy to run afoul of PFIC rules which lead to punitive US tax and a higher reporting burden if you do any investing. Being a US expat is expensive if you don't want to give up your citizenship.