This study aims to analyse the conversion-related issues from Savings and Loan Cooperative (SLC) into Islamic Savings Loan and Financing Cooperative (ISLFC) using a case study of Tunas Artha Mandiri (TAM) Cooperative, located in Nganjuk, East Java. Five main research questions include: exploring reasons for conversion, explaining the conversion process, assessing the level of conversion effectiveness, identifying obstacles during the conversion and analysing key success factors of conversion