The Ruling on Setting a Profit Margin in Sales

Question:
Is there a specific limit on the profit on a commodity? For example, if I buy a commodity for one hundred riyals, is it permissible for me to sell it for five hundred riyals?

Answer:
The profit is determined by the market price, whether it is high or low. If you sell it at what it is worth in the market, whether the price is high or low, there is no harm in that. However, if the price increase is a means of deceiving the buyer, such as if he is young, a woman, or a person who does not know about commodities, and you take advantage of his ignorance and increase the price beyond what is apparent, then this is not permissible. This is certainly a form of deception, so it is not permissible.
The one who determines the profit and calculates it is the market price. The prices of commodities in the market increase, meaning their values rise and sometimes fall. The standard is the market, just as people sell this commodity in the market.

Question:
May Allah reward you. The honorable scholar says: Fasting the month of Muharram.

Answer:
It was an increase due to the deferral. It is true that the market price is such and such, but that applies to a spot sale. As for a deferred sale, an increase over the current market price due to the deferral is permissible, provided it is not excessive. It must not be excessive; rather, it must be reasonable.