There are some incomes which cannot be conveniently divided into distinctive factor incomes.Such income arises to the self-employed like practicing lawyers, doctors, etc. Take for example a practising lawyer. The fees charged by the lawyer is not only his wages but also interest of capital employed by him, rent of his office and profit of his entrepreneurship. Since no data is available to sub-divide the lawyer’s fees into wages, rent, interest and profit, it is called mixed income.