EN
The method of determining the economic viability of farms has been presented in the article. An ability of family farms to supply income that is equal to the estimated level of a payment for farm own labor force and 4% of its working assets have been found the base for determination of this viability. Apart from determining the economic viability of a farm, the suggested method allows to classify farms which are economically viable or not, making use of a demographic criterion and taking into consideration vocational activity conducted outside a farm. Basing on the assumptions made, the classification of farms forming a sample of the Polish FADN in 2004 has been done. The results of these calculations have been generalized for 81% of the observation area of the Polish FADN which covers 745023 farms.