Offshore income of a company is not taxable in Hong Kong?
Hong Kong adopts a territorial source principle of taxation. Only profits which have a source in Hong Kong are taxable here. Profits sourced elsewhere are not subject to Hong Kong Profits Tax. The principle itself is very clear but its application in particular cases can be, sometimes, contentious.

To clarify the operation of the principle, Inland Revenue Department prepared a [ simple guide on the territorial source principle of taxation ].

It gives a brief explanation of how the principle operates and provides simple examples for illustrative purposes of the tests applied to different types of businesses. If you wish to explore the subject in greater depth, consultation with professional advisers is recommended.