What is the ruling on renting out my share of a shop to my partner or to another person for a fixed monthly sum?

It is permissible for someone who owns a share in a shop to lease it for a known and fixed rent to their partner or to someone else. This is because leasing is permissible for any object from which benefit can be derived while its essence remains. Leasing a shared asset to a partner is permissible by consensus, and leasing it to someone other than a partner is permissible according to the majority of scholars. This applies specifically to the share in the shop and its fixed assets. As for the merchandise, it is not permissible to lease it, because leasing pertains to usufruct, and merchandise can only be benefited from by selling it. Therefore, it can either be sold or the lessee can be authorized to sell it.