This research aims to create the best practice model of mudharabah contract in accordance with sharia principles. This study carried out a qualitative method. The data of the research were obtained from BPRS BDS in Yogyakarta. The subjects of this study were the president director, the head of Sleman branch office, the operational manager, the marketing manager, the account officer, the customers, and the sharia experts. Interview and documentation were used to collect data of the research. The validity of the data was tested by doing triangulation with the sharia experts. The findings of the research indicate that mudharabah financing at BPRS BDS has been completely in accordance with the fatwa of National Sharia Council No: 07 / DSN-MUI / IV / 2000. Profit sharing in BPRS BDS is based on realization, but its implementation sometimes still uses projection caused by some factors from the costumers. According to the SOP of BPRS BDS and sharia experts, the calculation of profit sharing should be based on realization. The profit sharing method used is revenue sharing. Revenue sharing is chosen because it facilitates financial pioneering, avoids the manipulation of financial report by the customers, and maintains the customer's good name in the banking system.