What is a customary tip percentage at a sit down restaurant if the bill is $80?

In the context of dining out at a sit-down restaurant, it is customary to tip between 15% and 20% of the total bill for good service. A bill of $80 would lead to a tip of approximately $12 if you choose to tip at 15%. This amount is commonly accepted as a baseline for satisfactory service, which is why the 15% tipping rate is considered the standard. Tipping at this percentage is practical and demonstrates appreciation for the wait staff's service.

Choosing a higher percentage, such as 20%, is also common for excellent service and would result in a tip of $16. However, the question specifically inquires about the customary percentage typically expected for good service rather than the generous amounts one might choose to give for exceptional experiences.

Higher percentages like 25% are generally reserved for truly outstanding service or in situations where the diner wishes to express particular gratitude. Overall, while tipping can vary based on several factors, tipping 15% is well-established and widely recognized in the dining community as a standard practice.