The main objective of the study was to evaluate the economic results of production of pigs for fattening and identify the main determinants its profitability. The results of the study were analyzed in three groups of farms divided by quartiles of gross margin, i.e. in the weakest, middle and in the best. The results were analyzed by three-year average. The differences in the economic results of pigs for fattening were influenced more by the incurred costs than the sales price. Income from pig production was obtained only on the best farms (PLN 20/100 kg). On medium and weakest farms, a loss was recorded, and production costs were partly covered, in 91.9 and 76.1%, respectively.