Economic analysis done in this study was based on the NPV model. Higher NPV values represent greater economic benefits. The investment costs accounted for include land value, stall value, dairy cow value, and biogas plant construction value, which, in the given situation, are treated as industrial segment. The average price for an industrial segment is more than the average price for agricultural land. The lower price of land overestimates the economic performance relative to when the land is treated as an industrial segment. Analysis based on the NPV model yields useful insights into the performance of a biogas plant in a farm. This study can be further extended to incorporate and address the uncertainties associated with the methane yields produced, subsidies, and the price of digestate.