This study aims to identify the factors influencing retailers’ intentions to use m-payment. The Unified Theory of Acceptance and Use of Technology (UTAUT) model was adopted and extended with two additional variables: trust and perceived risk (PR). The sample of 682 respondents was obtained through an online survey distributed to retailers throughout Egypt. The partial least squares-structural equation modelling method was employed to analyse the data and test the hypotheses of this study. In terms of outcome, performance expectancy, effort expectancy, social influences (SI), trust and PR are found as significant factors in the retailers’ behavioural intentions to use m-payment (BIU). Moreover, trust and SI were the most significant factors influencing the retailers’ BIU m-payment. This study provides insight into Egypt’s retail sector regarding BIU m-payment. Accordingly, decision-makers, m-payment providers and stakeholders can benefit from the results by looking at the significant factors and understanding the retailers’ BIU m-payment, especially when formulating strategies for the m-payment ecosystem. This study investigated the ‘pay pay cash’ initiative, which is being implemented for the first time in Egypt after the spread of the Coronavirus.