7/20/2018 When dining at a full-service restaurant in the United States, it is customary to leave a tip. The servers who work in these establishments earn little more than $2/hour and therefore depend on gratuity left behind by patrons for their livelihood. A general rule of thumb when determining how much money to leave as a tip is 10% - 20% of the total cost of the bill . For example, if the bill (sales and tax) is $100, your tip should be $10 - $20. Here are some other tips: Never leave less than 10%, even if you think your server totally sucks. Although it may seem simple, being a waiter or waitress can be extremely stressful and demanding. A lot of factors lie beyond the control of the server such as kitchen errors, facility issues and sometimes coping with several new tables at once. A decent service experience should receive about 15% of the cost of the bill. This means everything went smoothly, everyone was polite and t...