Revenue stream – within the meaning, given by the Tax Law, the revenue stream represents the income achieved by a physical individual or a corporate body during particular taxable period. This income is usually reduced with the expenses occurred for the same period. This is the way to establish who much is the amount of profit which represents the legal base for taxation. For example, a company acquires income of 100 000 dollars for the taxable year. It also has 60 000 dollars expenses. Then the profit is 40 000 dollars and this is the revenue stream and the base for taxation.