Is it permissible for the capital provider in a Mudarabah partnership to add a special profit for himself to the price of the goods before calculating it for the store, without informing the agent?

Mudarabah is valid only if its capital is in cash. It is not valid with trade goods according to the majority of jurists. Those who permitted it with trade goods stipulated their valuation and made their value at the time of the contract the capital.

Therefore, the aforementioned Mudarabah is not valid unless the trade goods are valued and their value is made the capital for the Mudarabah. The valuation is done by agreement of both parties on their market value, and it is not required to be their purchase price.

The owner of the capital is not required to inform the working partner of the price at which he purchased the goods, but it is not permissible to lie to him or tell him something contrary to reality.