Check first
At the border
🛂 ENTERINGHong Kong 
Allowed - but you must declare large sums.
- Carrying cash is legal, but amounts over the threshold must be declared.
- Typical limits: US $10,000 / EU EUR 10,000 (or equivalent).
- Not declaring can mean seizure and fines.
Import rules change often and vary by nationality. Confirm with the Hong Kong customs authority or your embassy before you travel.