The purpose of the study is to clarify the theoretical approaches associated with the formation and forecasting of household cash income, and to develop, on this basis, methodological recommendations for forecasting them in the system of regional accounts. To achieve this goal, the following tasks have been set: research and clarify theoretical and methodological approaches to the formation and forecasting of household income at the regional level; show the evolution of the economic essence of household income in the theoretical views of foreign and Uzbek researchers, systematize the basic principles of the formation of household income, necessitating the need to clarify the definition of household income, highlight the features of the formation of shadow income and informal household income in order to assess the impact of these processes on the formation of cash household income, to formulate the main directions of improving the study and forecasting of household cash income at the regional level, to carry out predictive experimental calculations of household cash income of the constituent entity of the Republic of Uzbekistan.