The aim of this study is to analyze the influence of Non Performing Financing (NPF), Return on Assets (ROA) and Operating Expenses to Operating Income (BOPO), Capital Adequacy Ratio (CAR) and Company size (Size) to the Financing to Deposit Ratio (FDR) of Islamic Banks in Indonesia. The variables of this study consists of independent variables that are NPF, ROA, BOPO, CAR, and Size. While the de…