A:
If you
put a down payment on a car while an intermediary company undertakes payment of the rest of the price provided that you repay the sum it pays in installments with an additional interest rate of 15 %, this is considered a form of prohibited Riba (usury). The sum paid by the intermediary company is considered a loan and the 15 % interest is paid in return for the loan.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.