How do Islamic banks make a profit if they do not charge interest?

 Islamic banking is based on the principles of Shariah, or Islamic law, which are derived from the Quran and the Sunnah of the Prophet Muhammad (peace be upon him). Shariah prohibits riba, or usury, which is the charging or paying of interest on loans of money. It also prohibits maisir, or gambling, which is any form of speculation or uncertainty in contracts. Furthermore, it prohibits haram, or unlawful, activities such as dealing with alcohol, pork, pornography, etc.

But how do Islamic banks make a profit if they do not charge interest? And how do they avoid speculation and uncertainty in their transactions?

Islamic banks make a profit through equity participation, which means that they share the risk and reward of a project with the borrower or the investor. For example, in mudarabah, which is a form of profit-sharing and loss-bearing contract, the bank provides the capital and the borrower provides the labor and expertise for a venture. The profit is shared according to a pre-agreed ratio, but if there is a loss, the bank bears it entirely and the borrower loses only his effort.

 But what if the borrower cheats or mismanages the project?

 Then the bank has the right to monitor and audit the project and to take legal action if necessary. The borrower also has to abide by certain ethical and moral standards in conducting his business.

And what about other modes of financing that Islamic banks use?

There are many other modes of financing that Islamic banks use, such as musharakah, which is a form of joint venture; murabahah, which is a form of cost-plus sale; ijara, which is a form of leasing; salam, which is a form of advance payment for future delivery; istisna, which is a form of manufacturing contract; etc. All these modes are designed to avoid interest, speculation, and uncertainty, and to promote justice, cooperation, and social welfare.