Tipping is not compulsory in Vietnam but is enormously expected, especially in the service industry. If you are pleased with the services provided, then a tip for people’s hard work will be very much appreciated.
For hotel porters, US$1/time/room is acceptable for those who have
escorted you to your room and/or delivered your baggage. Do forget
tipping for room attendants, they most working hard in hotels and
make your room always cleaned and sleep well
If you are happy with the service provided by your waiter or waitress
in any restaurant feel free to leave a tip of around US$2/person.
Many massage parlours of dubious repute pay their staff so little that
they live off tips, and will consequently openly ask for tips. Most
reputable spas discourage their staff from asking for tips, but if you
have had good service, then US$4-8US$ is the usual amount and will
be gratefully received.
Group of 7-14 people: US $20-25 / day for guide and US$10-12 /
day for driver
Hope above information is useful
http://travelindochine.net almost 7 years agoAnswered by Dent via WorldNomads.com