Each limousine service suggests a standard gratuity based on the total fare. Our average is from 15% to 20%. If your bill's total is $300, it's customary to tip the driver $45 to $60. Some companies include gratuity in their fare estimates, while others do not. In all fairness, gratuity should be left to the customer in the event service wasn't satisfactory. Most limousine chauffeurs earn their living by gratuities much like waiters do in fine dining establishments.