Optimum cropping plan has been developed using data from a sample of 40 farms in a farming system research area of Mymensingh district. The results revealed a considerable divergence between the existing and optimal crop plans under both restricted and unrestricted capital situation. Among the crops incorporated in the optimal plan under restricted capital, Aman (LV) found the prime place in the Kharif-II land under non-irrigated situation, accounting for 33 per cent of the total cropped area. When capital restriction was relaxed, brinjal (summer) was the most dominant crop occupying 39 per cent of total cropped area. The optimal return with unrestricted capital was 49 per cent higher than the existing return from the crop enterprises. The results imply that serious efforts need to be directed to remove credit constraints for improving farm incomes of the typical farms studied in the area.