Purpose The purpose of this paper is to identify factors affecting word-of-mouth (WOM) towards Islamic Banking (IB) in Jordan through understanding the roles of service quality and perceived value. Design/methodology/approach A self-administered survey was hand-delivered to the targeted sample of Islamic banks customers in Jordan. The authors delivered 400 questionnaires to customers from which 352 were deemed valid for the analysis. Exploratory and confirmatory factor analyses were performed to assess the research constructs validity and composite reliability. Structural path analysis was also used to test the research model and hypothesised relationships between the variables. Findings Service quality has a positive and significant effect on perceived value and WOM towards IB. Convenience has a positive and significant effect on perceived value. Finally, perceived value has a positive and significant effect on WOM towards IB. Service quality exerted the strongest effect on perceived value and WOM. Also, 38 per cent of variation in perceived value was caused by religious motives, service quality and convenience path, whereas 34 per cent of variation in WOM towards IB was caused by perceived value, service quality and convenience path. Originality/value This study is the first of its kind to test a model of WOM determinants in IB in Jordan. The study is thought to have made a reasonable contribution to consumer behaviour literature and, specifically, for decision-making process through developing and testing a model of WOM determinants towards IB. The study offers CEOs and marketing managers of Islamic banks new insights into the determinants of WOM and how they contribute to consumers' decision-making process and attitudes to achieve the intended behavioural outcomes towards IB, which were not available at their hands before. These empirical findings are crucial inputs for marketing strategy formulation and implementation.