How should one calculate an appropriate tip for service?

Calculating an appropriate tip for service often involves considering the quality of the service provided, which is best represented by employing a percentage of the total bill. This method allows for a more nuanced approach that reflects the level of service and the cost of the meal or service received. A common practice is to tip a certain percentage—typically around 15-20%—which incentivizes good service and shows appreciation for the server's efforts.

This method is also straightforward, helping customers easily adjust the tip according to their satisfaction. For example, if the service was exceptional, one might choose to tip more than the standard percentage, while less satisfactory service might lead to a lower tip. This approach is widely accepted in service industries, making it a standard practice for determining gratuity.

In contrast, rounding up the bill or contributing a flat amount does not take into account the variability of the service quality, and asking the server for their preferred tip amount might put them in an uncomfortable position, as it could blur the professional boundaries between customer and service provider.