Is the installment plan called "Islamic" in Egypt permissible, taking into account a 40% down payment, a 14% murabaha rate, and a prohibition on selling until all installments are paid, and comparing it to bank installment plans that start with a 10% down payment and an 8.5% interest rate, given that the total price in the Islamic system is higher?

Installment banking transactions or Murabaha (cost-plus financing) for a purchasing agent are permissible if they meet the Shariah requirements mentioned in the referenced fatwas. However, it is not permissible for a Muslim to deal with interest-based banks except in cases of dire necessity or urgent need, due to the implicit approval and support of a reprehensible act. Late payment fees in installments are explicit and forbidden usury (riba). If the prohibition of selling means mortgaging the car to the seller until the price is paid, then there is no harm in that. The increase in price in Murabaha is subject to the mutual consent of both parties, and the fact that a prohibited transaction is less costly does not justify engaging in it.