Managers administer the different areas of the business. One of these areas is finance. The article presents money in financial management, including a number of important concepts from the perspective of this management, such as changes in the value of money over time and their causes, discounting and interest, with numerical examples of their use. The author focuses on the management of enterprises' finance as a management of area of their activity (financial), including: its tasks, the types of decisions made under this area's management, i.e. investment and financial decisions, the primary company purpose and the instruments and their implementation. Moreover the article characterizes the features of the financial management of enterprises. Then it presents investment and funding rules of enterprises.