UK–Hong Kong Cross-Border Tax Advisory

If you have UK-source income (salary from a UK employer, UK rental income, UK dividends, or UK pension), yes — you must file a UK self-assessment return. If you are non-resident for the full tax year and have no UK-source income, you may not need to file — but you should confirm this by checking the SRT.

Yes — under Article 14 of the UK–HK DTA, employment income from HK employment is taxable only in HK (not the UK) if you are a HK resident and not a UK resident. Once you are non-UK resident under the SRT, your HK salary is not taxable in the UK.

If you are UK resident at the time of disposal, yes — UK CGT applies to gains on HK shares at 18-24% (depending on your income level). If you are non-UK resident, no UK CGT. The timing of a return to the UK relative to a share sale is a critical planning point. If you sell before returning, the gain is outside UK CGT.

Yes. UK domicile of origin is very hard to lose (you need a domicile of choice, which requires an intention to remain in HK permanently, combined with actual residence). Most UK nationals in HK retain UK domicile. All worldwide assets — including HK — are in scope for 40% UK IHT. Proper planning (excluded property trusts, BPR) can reduce this significantly.

The UK abolished the remittance basis regime from April 2025. The new "FIG" (Foreign Income and Gains) regime allows new UK residents (arriving from abroad) to exempt foreign income and gains for their first 4 years of UK residence. Long-term UK residents (15+ years) are now subject to UK IHT on worldwide assets regardless of domicile. This significantly affects long-term HK residents returning to the UK.

Under Article 22 of the UK–HK DTA, the UK gives credit for HK tax paid against UK tax on the same income. However, if your HK income is not taxable in the UK (because you are non-UK resident), no credit is needed or available. Credits are only relevant when income is taxable in both jurisdictions simultaneously.