Although researchers have often found positive relationships between organizational citizenshipbehavior (OCB) and performance rating, very few studies have scrutinized the team contexts in which such relationships exist. This study examines how OCB influences job performance ratings within different team cultures, as measured by team collectivism and individualism. On the basis of multilevel data collected from 81 teams working at a multinational bank in Hong Kong, teamcollectivism and individualism were found to moderate the OCB-performance rating relationship such that OCB targeting individuals improved rated performance in highly collectivistic teams only, whereas only organizational OCB produced a significant improvement in highly individualistic teams. The implications of these findings and directions for future research directions are discussed here.