Answer
(Fatwa: 1263/788/L=1433)
It is not lawful to receive fixed profit in partnership. Hence it is not lawful to take 4000 rupees each month after giving one lakh. If you want to do the dealing in partnership then it shall be necessary to fix the profit on percent i.e. in case of profit so and so percent shall be for so and so person, and in case of loss so and so percent of loss will be born from capital amount. It is not lawful in any case to receive only fixed profit (whether the profit is less or more) and not sharing the loss.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband