Purpose – This study aims to investigate the drivers of loyalty in Indonesian Islamic banks, especially group of depositor vs financing customer and single vs dual customer. Design/methodology/approach – The objectives of this study were the seven major commercial Indonesian Islamic banks using the purposive sampling technique. In total, 105 questionnaires were processed, consisting of questions regarding depositors, financing, single and dual customer. Structural equation modeling using partial least squares were the analysis methods used to test the hypothesis, while in-depth interviews were conducted with Islamic bank managers to validate the findings. Findings – Image has a significant relationship with customer satisfaction, as well as trust. Similarly, customer satisfaction has a significant relationship with trust. Trust has a significant relationship with loyalty. For a financing customer, the image is very influential on customer trust. For a depositor customer, customer satisfaction is very influential on customer trust. For single customer, customer satisfaction has a stronger influence on the image, compared to dual customer