This paper is an extension of previous research that has been done on factors affecting digital payment adoption in the UAE. This study focuses on analyzing which relevant demographic factors affect new e-payment technologies, mainly in the smart city Dubai, with more complexities and dynamics of variables that affect users' behavior toward adopting new technologies. The current research included a wider range of demographic factors compared to previous studies. Quantitative methods were conducted using a survey of 270 individuals living and working in Dubai. This study revealed that e-payment adoption is very high, which could be aligned with the national digital transformation strategy of the UAE. The results of the chi-square test for independence indicate that using e-payment technologies is positively associated with the level of education and the level of income. This is confirmed by the fact that the UAE's demographic shape is identified by its high-income groups, positively influencing the residents' e-payment adoption. Surprisingly, the significant results for independence were not found between using e-payments and the gender, marital status, age group, and the current professional position in Dubai. This research's contribution adds to both academia and industry in the digital transformation and technology adoption field. Based on the results, it is recommended for decision-makers to leverage education, digital literacy, and income to accelerate moving toward a cashless economy. However, not having statistically significant differences between the rest demographic variables and adoption will encourage businesses and e-payment service providers to deliver new innovative e-payment models and technologies in a smart city context.