Tipping used to be an open-ended question. We decided the percentage and calculated the amount ourselves. Today, it has become a multipe-choice question. Pre-set options along with exact amounts are displayed on receipts or screens. This shift has changed how we feel about the act of tipping.
At Kabuto in Long Beach, the receipt offers three tipping options: 20%, 15%, or 10%, arranged from highest to lowest. It gave me a sense of flexibility, but the order and limited range pushed me toward choosing within a set range.
Lori’s Diner in San Francisco took a more assertive approach. The receipt included checkboxes for 18%, 20%, or 25%, and showed the final total for each selection. This removed the burden to calcuate, but made it harder to say no.
At Eel River Café at Garberville, the screen displayed four tipping buttons for 15%, 20%, 25%, and even 30%. Each amount was pre-calculated and shown clearly, creating a sense of obligation.
What once felt like a personal gesture of appreciation now feels more like a social obligation. As tip percentages rise and digital prompts become aggressive, the tipping experience shifts from a sincere expression of thanks to a manufactured sense of guilt.
The paper presents a model of the evolution of social norms. When a norm is costly to follow and people do not derive benefits from following it other than avoiding social disapproval, the norm erodes over time. Tip percentages, however, increased over the years, suggesting that people derive benefits from tipping including impressing others and improving their self-image as being generous and kind. The implications to the norm of not cooperating with new workers who accept lower wages are discussed; the model suggests that incumbent workers have reasons to follow this norm in addition to avoiding social disapproval.
