In the United States: At restaurants, a 15% tip is standard for waiters; up to 20% may be expected at more expensive establishments. The same goes for taxi drivers, bartenders, and hairdressers. Coat-check operators usually expect $1; bellhops and porters should get 50 cents to $1 per bag; hotel maids in upscale hotels should get about $1 per day of your stay. On package tours, conductors and drivers usually get $10 per day from the group as a whole; check whether this has already been figured into your cost. For local sightseeing tours, you may individually tip the driver-guide $1 if he or she has been helpful or informative. Ushers in theaters do not expect tips.
In Canada: Tips and service charges are not usually added to a bill in Canada. In general, tip 15% of the total bill. This goes for waiters, waitresses, barbers and hairdressers, and taxi drivers. Porters and doormen should get about $1 a bag (or more in a luxury hotel). For maid service, $1 a day is sufficient ($2 in luxury hotels).