OK so does HMRC tax lump sum distributions (whatever they are) paid to UK tax residents from US qualified retirement accounts.
For example Mrs. USExpat has $100k in a 401k account. She is 60 years old and takes out the entire balance in one withdrawal......I think we all agree that's a lump sum payment as it couldn't be any lumpier.....Article 17.2 give the US the sole taxation authority over the payment and Mrs. USExpat duly enters the distribution on her 1040 and pays US tax on it. However, does HMRC apply the saving clause and tax the lump sum, Yes or No?
If No then Mrs. US Expat does nothing more than rejoice at the current exchange rate.
If Yes should she have filed a self assessment, paid the UK first and resourced the lump sum payment to the UK so that a FTC could be claimed on the 1040?
I get the feeling that the answer is no, but is that just current HMRC policy and could it change?