Many people are unsure about how much to tip in the US . First, know that tips in the United States are “optional,” but everyone does, as waiters and waitresses depend heavily on what customers give (for the enterprise, they are paid minimum wage or less). Rarely, and unlike in Brazil, the tip is added to the final bill, so make a calculation of around 15% of the total amount for lunch and 20% for dinner, and give it to the person who served you.