Question for Nun.
You said:
I have no idea how HMRC assesses residency in this situation or whether it even bothers to apply the saving clause.
I said:
I've puzzled over that. I think (hypothesize) they probably do, where primary taxing right depends on residence.
My hypothesis was way off the mark.
"HS304 Non residents - relief under Double Taxation Agreements (2015)" (
https://www.gov.uk/government/publications/non-residents-relief-under-double-taxation-agreements-hs304-self-assessment-helpsheet/hs304-non-residents-relief-under-double-taxation-agreements-2015) explains.
If you were resident for tax purposes in a country other than the UK, and you want to claim relief from UK tax, under the terms of a DTA between the UK and that other country, as a resident of that country then you need to get a certificate from the overseas tax authority. You must state on the certificate that you are resident there for tax purposes for the period in question.
unless you're a US citizen, in which case:
Article 4(2) of the Double Taxation Convention (DTC) provides that a citizen or green card holder will be treated as a resident of the USA for purposes of the DTA, and thereby entitled to treaty benefits, if the following 2 conditions are met:
they must have a substantial presence (see ‘Substantial presence test’ below), permanent home or habitual abode in the US
they mustn’t be treated as a resident of a state other than the UK under any treaty between the UK and a third state
To me this seems to say that in the case of
- a US pension paid by the USG (so the US has source taxing rights)
- to a UK resident who is a US citizen (but not a UK national) and doesn't meet the substantial presence test,
-the US has primary taxing rights as source and the UK will not tax.
In the case of
- a US pension paid by the USG (so the US has source taxing rights)
- to a UK resident who is a US citizen and also a UK national,
-the UK has primary taxing rights and the taxpayer will need to claim US FTCs or possibly can file a form requesting that the withholding be discontinued.
In the case of
- a US pension not paid by the USG (so the US does not have primary taxing rights)
-to a UK resident who is a US citizen and doesn't meet the substantial presence test,
- the UK has primary taxing rights and will tax, and the recipient must claim FTCs from the US.
Do you agree?