The study was conducted on primary data, collected from a sample of 60 banana growers, consisted of 26 (43%), 25 (42%) and 9 (15%) marginal & small, semi-medium and medium & large category. The data were collected from the sample growers with the help of specifically prepared pre-tested schedules through Survey Method by interviewing them, selected through Multi-Stage Sampling Technique from a cluster of 3 villages of Nawgachia block of Bhagalpur district. The study revealed that per ha average total cost of cultivation of banana var. robusta was found ranging between Rs. 1, 00,566.45 on marginal & small farms to Rs. 95, 294.42 on medium & large farms. The variable costs included material cost (72.55 %) and labour cost (23.60 %). The material cost was found highest (Rs.72364.71 per ha) on marginal & small farms. The average labour cost was estimated as Rs. 22512.93 per ha. The average cost of irrigation and fertilizer constituted 35.59 per cent and 16.01 per cent of total cost, respectively while labour cost constituted of 23.60 per cent. The yield (number of bunches per ha) was found ranging from 2768 to 2847 among three categories of farms and the average price received by the banana growers was Rs.129.91 per bunch. The average gross income has been estimated as Rs. 3, 64,007.87 per ha, which was ranging in ascending order to size of farms; i.e., higher on large farms and less on marginal farms. The “return to total cost ratio” was estimated at 3.78, which was also in ascending order to size group.