PTPN IV Medan Company is a company operating in the plantation sector in Medan, Indonesia. As a company operating in the business sector, PTPN IV Medan also has a retail business division which is an important part of its operational activities. This research is the result of qualitative research by raising the problem of how to apply Islamic economic principles in the PTPN IV Medan company. This type of research method is qualitative research using a descriptive approach and library research. As for the data sources in this research, the primary data is interviews with related parties, namely employees who work at the PTPN IV Medan company, while the secondary data is data obtained through reports regarding the PTPN IV Medan Company. In this context, it is important to evaluate the extent to which this company applies Islamic economic principles in its retail business. This analysis can also provide insight into the effectiveness and success of implementing Islamic economic principles in the company's retail business.

This study discusses the analysis of financing with the principle of murabahah at PT. Bank Sumut Syariah Medan. The murabahah contract is the sale and purchase of goods at the original price with an additional profit agreed upon by the seller, who must notify the price of the product he purchased and determine a level of profit in addition to it. The research method used is descriptive qualitative with data collection techniques through interviews and observations. The results showed that the murabahah financing mechanism at Bank Sumut Syariah Brigjen Katamso Medan can be used by all human beings where the type of business must remain in accordance with Islamic sharia and in order to minimize the risk of default the bank provides action in the form of supervision.