Aim/purpose – This study aims at investigating the incidence of procedural justice, job satisfaction, and organisational citizenship behaviour (OCB) of employees within small and medium scale enterprises (SMEs) in Nigeria. The main thrust of the study is to provide justification for the possible link between these behavioural factors with a view to establishing their roles in fostering SMEs. Design/methodology/approach – A cross-sectional survey design was employed to elicit information from 1420 employees randomly selected from 71 surveyed companies. The responses from the questionnaire were analysed employing correlation and hierarchical regression analysis. Findings – The result showed a significant relationship between procedural justice, job satisfaction, and OCB after controlling for age and gender. The study, therefore, concludes that procedural justice, job satisfaction and citizenship behaviour of SMEs employees are imperative for the success and ultimate survival of SMEs. Research implications/limitations – Understanding the impediments to the growth of SMEs in developing nations require an indebt understanding of some behavioural factors. The study was limited to SMEs in Lagos, Nigeria. Original/value/contribution – The study recommends the need for managers of SMEs to monitor these three behavioural outcomes in other to ensure the sustainability of their businesses. This would in the long run, improve an employment, and reduce poverty. It also provides statistical norms for researchers.