This study examined the relationship between employee commitment and organizational citizenship behavior in Nepalese companies. A survey was administered to 340 employees across five companies. The results showed that affective commitment and normative commitment were positively related to both factors of organizational citizenship behavior - altruism and compliance. Continuance commitment was not significantly related to altruism or compliance. The findings imply that affectively and normatively committed employees are more likely to exhibit organizational citizenship behaviors that benefit coworkers and the organization, while continuance commitment does not influence such extra-role behaviors. Overall, the study found employee commitment, especially affective and normative commitment, can promote organizational citizenship behavior in Nepalese workplaces.