UK Tax Questions? Ask a UK Tax Advisor for answers ASAP
Hello, I am Keith, one of the experts on Just Answer, and pleased to be able to help you with your question.
If you spend more than 183 days in the UK in any one tax year [6 April to the following 5 April] you will be liable to UK taxation on your world wide income. At that level of income 175K, ignoring the car allowance, you will be in the 45% tax bracket have no personal allowance and a tax bill of some GBP 62.65 per annum.
This is essentially an UK taxation advice site ans I am unable to compute your US tax liability as the number of permitted deductions is too complex; furthermore there is the matter of State taxes to be considered.. However, the UK does have a Double taxation Treaty with the USA and, indeed, similar treaties with a number of individual States within the Union also under which the same income stream can only be taxed in one jurisdiction. This is achieved by means of tax credits, the tax paid in one country being allowed as a tax credit against the liability in the other.
That is about as far as I can go on this question. I do hope that I have been of some help.