The information required for the study was collected from 60 farmers by personal interview method using pre­tested schedule during 2009-10. The results on economic analysis of rubber plantations in South Tripura district of Tripura state revealed that, the cost of establishment per ha was found to be ` 2,41,011 and ` 2,27,430 of which investment costs constituted 18.92 and 18.64 and maintenance cost 81.08 and 81.36 per cent in small and large plantations respectively. The average per ha maintenance cost incurred by small growers was ` 1,95,408.01 during the first six years, of which variable and fixed cost accounted for 69.67 and 30.33 per cent, respectively. It was ` 1,85,033.62 in large plantation where variable and fixed accounted for 67.97 and 32.03 per cent, respectively. The average per ha maintenance cost incurred during sixth year onwards was ` 80,933 and ` 82,115 in small and large plantation respectively. The yield obtained in the form of sheet rubber was 1423.77 and 1390.45 kg and in the form of scrap rubber was 123.91 kg and 134.59 kg respectively and the net returns were ` 1,81,485 and ` 1,73,877 in that same order. The net present values were positive and of higher magnitude indicating soundness of the investment. The internal rate of return was found to be more than opportunity cost of capital (12%) indicating profitability of the business. The returns per rupee investment were capable of generating nearly two rupees which was highly profitable venture. The pay back period analysis revealed that the initial investments can be recovered within eight years. Overall, the proposition of growing rubber crop was highly profitable as revealed by the financial feasibility tests