tipping in honghong is a complex problem because you only tip certain services.
while it is not customary to tip taxi drivers, they may take the liberty of rounding up the fare to the nearest dollar figure. some, however, will round the figure downwards and make you pay a few cent less then the actual fare.
you should also remember that there are road and tunnel charges, and HK $5 IS CHARGED FOR EACH PIECE OF LUGGAGE put IN THE TRUNK.
Although most restaurants usually put on the bill a 10 per cent service charge, this sum does not go to the waiting staff- the restaurant keeps it. therefore, it is customary to leave some tip on top of the 10 per cent. even a small sum is appreciated.