The relationship between family involvement and family business performance in the global north is well established in extant literature. Due to the collectivism and care syndrome associated with the nuclear and extended family systems, the same cannot be said of Nigeria and Abuja in particular. Moreover, differences in individual characteristics are another factor that can affect family members' level of involvement in their family business. Taken together, the focus of this study is to investigate the contributions of the father, mother, children, and extended family member’s involvement in the financial and non-financial performance of family-owned restaurants in Abuja. A cross-sectional research design, criterion sampling technique, and census method were adopted for the study. The generated data via a questionnaire from the restaurant founders were analysed using multiple regression. It was found that the effects of the father, mother, children, and extended family member’s involvement on the financial and non-financial performance are positive and significant. Hence, we conclude that family-owned restaurants that involve the father, mother, children, and extended family members achieve better improved financial and non-financial performance. Owing to the importance of generalising the findings, the generation of data from restauranteurs of different cultural affiliations in other parts of Nigeria and the world is suggested for further studies.