by TaxationWeb@BritishA on Sat Aug 27, 2005 5:55 am
Assuming maths is right, then you are subject to double taxation, but it may not be as bad as it seems.
You might not want to give up your UK domicile, but perhaps you should speak with a dual qualified UK/Japan adviser to make sure that this is advisable. Domicile is not citizenship; if you give up your domicile you still remain a UK citizen. You need to weigh the pros and cons for both countries.
Assuming it is advisable to remain UK domiciled, then the UK will tax your worldwide income, but give a tax break for any foreign taxes paid. Japan, if it also deems you domiciled, will give you a tax break for any foreign taxes paid.
Thus, UK gives a tax break for Japaneses IH taxes paid on Japanese assets, and Japan gives a tax break for UK IH taxes on UK assets. The double tax arises on assets held in countries that have no tax, where both UK and Japan will tax the asset and there will be no corresponding foreign tax to reduce the domiciled country taxes.