This study aimed to determine the implementation of profit and loss sharing in the mudarabah financing agreements at BMT Tumang. The research method employed juridical empirical descriptive. The primary was obtained from interviews with the Managers and members of BMT Tumang. The secondary data was obtained from statutory regulations. The data collection techniques used interviews and literature studies. The interviews were conducted at the BMT Tumang office, Boyolali, Central Java. Based on the research and data analysis results, the implementation of profit and loss sharing in the mudarabah financing agreements at BMT Tumang was based on the two parties' agreements as outlined in the contract. Members gave the profit and loss sharing to BMT Tumang according to the agreed portion ratio. If there were a loss, BMT Tumang would bear the financial risk, as long as it was not caused by the risk of bad character from the members, there was an error or violates the terms of the agreement.