In some countries, tipping is basically synonymous with paying. Due to low restaurant wages, a server's tips are often the majority of their income. Initially reported by Go Compare, here is a list of countries and their gratuity expectations:

Austria: Rounding up the bill is considered customary, but tipping is not.

Australia: Tipping 10% if you had good or great service is considered normal.

Bali: Restaurants usually add a service charge to the bill.

Belgium: Service charge is usually added to the bill.

Bulgaria: Rounding off the bill is customary.

Canada: It is expected to tip 15-20%

China: Tipping is not expected. Some may consider it to be impolite.

Cuba: Tip 10-15% of the total bill.

Denmark: All service bills already include tip.

Egypt: A 10% tip is almost always expected.

France: Leaving €1 for every €20 spent is customary.

Japan: Tipping is not a common practice in Japan and may even be refused.

Mexico: Leaving a 15% tip is standard.

Morocco: Tipping is not customary, but appreciated.

New Zealand: Tips are not expected in New Zealand. The most would be the extra change from a meal.

Portugal: Tipping is not required, but if the service was good, leaving a euro or two is appreciated.

Russia: A standard restaurant tip is usually 5-10%

Singapore: If you would like to tip your server for the meal, hand cash directly to them and thank them for the service.

South Korea: Tipping is not expected.

Sri Lanka: A 10% tip is usually expected.

Switzerland: All service charges will be included in the bill.

Thailand: It is customary to leave behind loose change as the tip.

Turkey: A 10-15% tip is customary.

United Kingdom: Only leave a tip if you are happy with your service. A 10% tip is usually customary.

Vietnam: Tipping is not required. Some restaurants add 5% service charge, but that is the extent of gratuity in Vietnam.