The aim of the study was to present economic evaluation of blue lupine with spring barley mixtures compared to pure sowing of blue lupine and barley. The source material are the results of a field experiment carried out in 2011-2014 at the Institute of Soil Science and Plant Cultivation – Agricultural Experimental Station Grabów (Mazowieckie Province). The analysis showed that the production value in each year varied, however, the highest level for all crops recorded in 2014. This variation mainly resulted from the sale prices and the yield obtained in the years of the study. Analyzing the structure of production costs, it was found that the largest share of costs accounted for fertilization - especially in cultivation of barley, while the lowest costs were incurred for plant protection. The highest level of gross margin, provided the cultivation of mixtures of blue lupine with a cereal. Comparing the years, it was found that the highest level of gross margin for all crops were obtained in 2014.