In economics, personal income refers to an individual's total earnings from wages, investment enterprises, and other ventures. It is the sum of all the incomes received by all the individuals or household during a given period. Personal income is that income which is received by the individuals or households in a country during the year from all sources. In economics, personal income refers to an individual's total earnings from wages, investment enterprises, and other ventures. It is the sum of all the incomes received by all the individuals or household during a given period. Personal income is that income which is received by the individuals or households in a country during the year from all sources.