Purpose This paper aims first to evaluate the service quality of Islamic banking and second to explore the withdrawal behavior of Islamic banking depositors based on their evaluation towards its service quality in the context of Indonesia. Design/Methodology/Approach A total of 276 Islamic banking customers in Jakarta, Indonesia, were involved through a direct survey. Factor analysis was carried out to uncover the key dimensions of Indonesian Islamic banking service quality. Next, we use central tendency measurement to extract the information of depositors’ withdrawal behavior towards those dimensions. Afterwards, the importance and performance analysis (IPA) was employed to evaluate the level of Indonesian Islamic banking service quality. Findings The exploratory factor analysis uncovered five key dimensions of Indonesian Islamic banking service quality, including reliability, bank-customer relationship, tangibles, Shari`ah issues, and rates and charges. Shari`ah and tangible are the first and second most influence factors for depositors to withdraw their funds from Islamic bank. However, despite their high level of importance, Shari`ah and tangible were always perceived poor in performance while others were largely modest. Within this kind of situation, withdrawal risk is, therefore, should be the most potential risk to be anticipated. Originality/Value This paper conducts an empirical research on Islamic banking service quality as an approach for detecting withdrawal risk in the context of Indonesia.