Implementing Islamic economic principles in religious education institutions has gained increasing attention recently. The Islamic financial system is based on the principles of social justice, ethical business practices, and community welfare, making it an attractive alternative to conventional economic systems. This paper explores the implementation of the Islamic financial system in religious education institutions, specifically at Nurul Islam Nature School in Bekasi Regency, West Java-Indonesia. The research was conducted through qualitative methods, including interviews and observing the school's economic practices. The study reveals that Nurul Islam Nature School has integrated Islamic economic principles into their institutional framework, including Zakat, Sadaqah, and ethical business practices. The school also emphasizes the importance of community welfare and social responsibility. Implementing the Islamic economic system in Nurul Islam Nature School has resulted in more ethical and sustainable financial practices, promoting social justice and fairness. Moreover, it has encouraged students to develop a deeper understanding of Islamic economics and its relevance to their daily lives. The findings of this study have significant implications for religious education institutions and policymakers interested in promoting ethical and economic practices in the education sector. It highlights the potential of the Islamic financial system to promote social welfare and sustainability, which can serve as a model for other educational institutions to follow.