AbstractThe concept of interest and riba (usury) in Islamic perspective is that interest additional charge on the loan transaction money (al-qardh) were calculated from loon capital without considering the utilization / outcome of the capital based on certain time advance, and are generally based on percentage. While riba is taking addition charge, both in buying and selling as well as borrowing and lending which is contrary to the muamalat principles of islam. There are found kinds of usury, namely: riba qardh, riba jahiliyah, riba fadhl, and riba nasi’ah. The basic principles of Islamic economy in the Islamic banking are Mudaraba, Musyaraka, murabaha, economy tied with dogma, sharia (law), morality, and balance between materiality and spirituality, individual freedom, social security and individual and social welfare. Kata kunci: Bunga; Ekonomi Islam; Perbankan Syariah.
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