How much to tip in USA?
When budgeting for a US trip, keep this tipping guide in mind.
Restaurants – Usually 15 to 20%. (The bill in tourist areas or large groups may already include a tip, so be sure to check the bill before paying.)
Bell boy – $1 per bag($2 for the first bag)
Bar – $1 or $2 per drink
Taxis – 10 – 15% of the fare
Doorman – tip for extra effort
Concierge – tip for extra effort. For example, organising tickets to shows, reservations to restaurant