Tipping is not compulsory in Vietnam, however it is enormously appreciated. You should consider tipping tour guides, drivers, hotel staff, boat crews, etc. There is no standard amount for tipping but if you do find reason to tip someone, a tip from $1 USD should be ok for a day trip.

See also other FAQs

On-site tour guide, tour guide and tour escort/leader?

Are your tour guides/leader licensed?

Do your local tour guide speak English well?

What languages do your tour guides can speak?

Does the leader / guide speak the local language/dialect?

Does the leader / guide hold any formal qualifications?

How long the guide doing similar tours?

Are any of the leaders guides first aid trained?

What training has the leader / guide received?

Guides speak English to what level?

Sufficient number of trained and experienced staff?

How many guides & porters employed for the expedition?