The author deals with the issue of integrating different sources of income in the agricultural economy up until World War II in Slovenia, which at that time was included in the Habsburg Monarchy, and after the end of the First World War was a part of the Yugoslav state. The integration of different income sources was indispensable, since the fragmented farm structure prevented peasants from covering the living costs of their families solely with the income they derived from agricultural activities; in particular those farmers who owned less than five hectares of land. On the other hand, it is important to note that peasants worked to combine various sources of income not only out of necessity, but also from the desire to improve the stability and quality of the living standard of their families, or to provide funds for investments.