The verdict
Hong Kong is territorial. Salaries tax uses 2% to 17% progressive bands with a standard-rate cap of 15% or 16%, profits tax is 8.25% then 16.5%, and there is no GST, no general personal CGT and no inheritance tax for deaths after estate duty was abolished.
The UK taxes residents on worldwide income. Income tax reaches 45% outside Scotland and 48% in Scotland, National Insurance applies to employment, individual CGT is 18% or 24% from 6 April 2026, and 40% inheritance tax can cover worldwide assets for long-term UK residents.
Choose Hong Kong if the income is genuinely Hong Kong-sourced and you can evidence that source. Choose the UK when customers, fundraising or English-law work require a British base. Another country's residence claim can still tax a Hong Kong salary, and UK-source work remains UK-taxable even if you spend most of the year in Asia.
How to read this comparison
Hong Kong and the United Kingdom are both English-law commercial centres, but they tax people in opposite ways.
Hong Kong does not start from worldwide income. Employment is salaries tax, business is profits tax, rent is property tax. Progressive salaries tax runs from 2% to 17%, with a standard-rate cap of 15% or 16% so the charge cannot keep climbing the way a 45% UK additional-rate bill does. Two-tier profits tax is 8.25% on the first HKD 2 million of assessable profits and 16.5% above that. Genuine offshore profits can stay out of the net if the source is not Hong Kong, although specified foreign passive income received in Hong Kong by multinational-group entities can be pulled in under the FSIE regime. There is no GST, no general personal capital gains tax, no dividend withholding and no estate duty for deaths after February 2006.
The UK resident is generally taxed on worldwide income. Income tax is 20%, 40% and 45% in England, Wales and Northern Ireland, with a 48% Scottish top rate on non-savings income. Employment adds National Insurance. Individual CGT is 18% or 24% from 6 April 2026 after a GBP 3,000 annual exempt amount. Dividends from April 2026 are 10.75%, 35.75% or 39.35%. VAT is 20%. Inheritance tax is 40%, and long-term UK residence can put worldwide assets in scope.
A four-year foreign-income-and-gains claim is available to a qualifying new UK resident after ten consecutive years outside the UK. That is a limited relief, not a territorial system. The practical constraint in this pair is source versus residence: a Hong Kong salaries-tax return does not stop the UK taxing UK-source work or a person who is still UK tax resident.