This study aims to determine how the implementation ta'zir / fines imposed by BMT Surya Artha Asa and if there is agreement that has been set in the DSN-MUI fatwa No.17/DSN-MUI/IX/2000 with the practice. In the process of financing, there must be customers who delay payment of installments, either intentional or unintentional. Musharaka financing is financing one of the most widely used in BMT Surya Asa Artha. Methods used in this research is qualitative research methods and analysis used is descriptive. This research is a field research or field research. The data used in this study are primary data obtained from interviews with the BMT Surya Asa Artha and secondary data obtained from BMT internal documents and interviews with several customers. Results from the study showed that the application of ta'zir / fines for customers who procrastinate in BMT installment payment financing Asa Surya Artha can be said is not in accordance with the DSN-MUI Fatwa No. 17/DSN-MUI/IX/2000. Because in practice ta'zir / fines have not been carried out openly at the beginning of the contract (agreement).