What should the husband do during the period preceding the return of money to its owners, and how does he calculate or estimate the percentage, especially since there is no loss in his business, and if he reduces the profit percentage, the owners of the money may demand its return, which he is currently unable to do?

Your husband is not permitted to agree with the capital owners on a guaranteed profit percentage or to guarantee their principal amounts, because that is considered an interest-based loan. The শরী'আ-compliant solution is for the agreement to be based on participation in profit and loss, so that the capital owners receive a percentage of the profit (not the principal), and they bear losses in proportion to their shares in the capital.

Therefore, it is not permissible to specify a fixed amount of profit for any partner; scholars have reached a consensus on invalidating qirad (Mudarabah) if one or both partners stipulate a known amount of money. Losses are distributed among the partners according to their shares in the capital.

Before entering into the partnership, the shop and its contents must be appraised to determine your husband's capital. If monthly accounting is burdensome for him, it can be done every two, three, or six months.