Yes, tipping is common in Niagara Falls, Canada. As a rule, service staff expect a tip of 15-20% of the total bill. This applies to waiters in restaurants, cab drivers and hotel staff, among others. However, the amount of the tip is always a matter of discretion and should reflect the quality of the service provided. It is also worth noting that some establishments add a service charge to your bill, in which case tipping is not necessary.