What is the ruling on purchasing a car in convenient installments from a usurious bank that deals with the same practices as Islamic banks, knowing that its dealings are more respectful than those of Islamic banks?

The fundamental operation of usurious banks is dealing with forbidden interest (riba). They do not sell on installments that adhere to Sharia-compliant regulations. Among the most important of these regulations are: that the bank must truly own the commodity before selling it, that it sells it for a fixed price at the time of the contract, and that no additional charges accrue for late installment payments. If the bank pays the price of a commodity on behalf of the client and then reclaims it with an increase, this is a forbidden usurious loan.

Therefore, it is not permissible to deal with usurious banks, because such dealings are either forbidden usurious transactions by Sharia, and Allah has warned those who deal in riba with war, or they constitute aiding the bank in continuing its forbidden work, and Allah has prohibited cooperation in sin.

Whoever finds an Islamic bank is not permitted to deal with usurious banks. However, for those who cannot find an Islamic bank, it is permissible for them to deal with a usurious bank, provided that the dealings comply with the provisions of Islamic Sharia.