In some countries around the world, tipping is not customary. But there are at least 180 countries where travelers need to know the rules. In some places, like China, where tipping was not custom in the past, that's changing. In most other countries, tipping is customary but the rules can be complicated. Restaurants In the U.S., restaurant servers expect a tip of 15% to 20% of the check depending on how satisfied you are with the service. In most other countries, however