The withholding tax rate of corporate income tax in Hong Kong is 16.5%. Companies in Hong Kong have to pay taxes according to their income, and the tax rate is 16.5%. For companies established outside Hong Kong that have business income in Hong Kong, they need to declare and pay enterprise income tax in accordance with the provisions of the Hong Kong tax law. The company has no actual business in Hong Kong, only its branches in Hong Kong are required to withhold and pay enterprise income tax according to the regulations of the Hong Kong Inland Revenue Department, and the withholding tax rate is also 16.5%.