Purpose This paper aims to study how the negative spiral of incivility from customers to employees happens by measuring the mediating effect of employees’ burnout. Moreover, it investigates how to mitigate the detrimental influences of customer incivility by assessing the moderating effect of employees’ emotional intelligence. Design/methodology/approach A cross-sectional questionnaire survey using MTurk was conducted, targeting full-service restaurant employees. Descriptive statistic, confirmatory factor analysis, structural equation modeling and hierarchical multiple regression analysis were applied. Findings The results presented that there is a direct relationship between customer incivility and employee incivility toward customers and coworkers. Additionally, employees’ burnout significantly mediates the relationship between customer incivility and employee incivility. Moreover, it presented the significant moderating effect of employees’ emotional intelligence on the relationship between customer incivility and employee incivility. Research limitations/implications Experiences of customer incivility during a service encounter directly trigger employee incivility. Moreover, customer incivility indirectly leads to employee incivility by increasing employees’ burnout. In addition, employees’ emotional intelligence mitigates a negative spiral of incivility from customers to employees. However, this study has limitations that provide suggestions for future research. Originality/value This research shows how customer incivility causes employee incivility in the workplace. It also shows a significant moderating role of employees’ emotional intelligence to mitigate the influence of customer incivility on employee incivility.