Originally Posted by
CarefreeBA
Places in Hong Kong are split into:
As a tourist, most places that you will visit won't be cash only unless you go to those 'hidden food gems' down a backstreet-type places.
You can get a refund of your Octopus and balance on it when you leave Hong Kong. As a tourist, I'd say put about HKD 100 for every day you're there, plus another HKD 100 and it should cover you for the whole trip (MTR, ferry, 7-11, quick food breaks etc.).
Taxis are still mostly cash only I think, unless this has changed significantly with the digital payments program over the last few months.
I've found that 100 HKD can cover me for a week of short commutes on the MTR but if you start using the Octopus for everything (e.g. when touring about) it can dwindle very fast. A round trip ferry ride to and from an outer island and one snack from 711 and you can be pretty much done.