Semi-subsistence farms are still numerous in Poland, but it is impossible to determine their specific number. Their role in the market production is not very significant, but they cover quite a large area of agricultural land, as they played a role of the social buffer. The sample of 175 semi-subsistence farms was divided into two sub-groups according to the level of net agricultural income per one person employed on a full-time basis. The threshold for the division was the salary in non-agricultural sectors. The analysis showed that less than one third of farms achieved income parity. Logistic regression allowed to evaluate the probability of the shift to the “parity” group. The results revealed that the only statistically significant variables determining the classification into the “parity” group included agricultural land area (positive income), the share of agricultural income in disposable income (positive impact), number of family members (positive income) and number of persons employed full-time on the farm (strong negative impact).