This study comprehensively analyzed customer tipping behavior in foodservice contexts over the past twenty
years (2003-2023) in the United States. Utilizing a scoping review approach, the research utilized bibliometric analysis
and qualitative synthesis to explore trends and gaps in the literature. Specifically, it mapped the research domain and
extracted key themes by statistically examining academic publications. The findings, derived from a refined dataset of
103 articles, revealed the interdisciplinary nature of tipping research, primarily explored by social psychologists and
economists. Three main research themes emerged: social psychology and management, economics, and socio-cultural,
each offering unique insights into customer tipping behavior. This study not only elucidates the current understanding
of tipping practices but also highlights significant research gaps, guiding future scholarly inquiries in this evolving field