The work is devoted to modeling of company’s financial flows using XML. Company’s financial flows have been described and their classification has been presented in the introduction. The problem of compatibility of data exchange formats has been raised. The aim of the work has been stated, as well as the problems to be solved. The XML review has been presented in Chapter 2. The main XML system components have been described. Such notions as XML data files, XML schemas, XML transformations have been explained. The structure of an XML file has been analyzed and the rules of a “well - formed” XML have been formulated. Chapter 3 deals with the possibilities of XML application in Excel 2003. One of the main notion of XML – the map notion - has been introduced. The relationship between XML maps, schemas and data files has been established. The task pane XML Source has been considered in detail. Chapter 4 deals with the problems of XML data import and export using Access 2003. The practical part of the work has been described in Chapters 5 and 6. The examples of XML maps creating in Excel 2003 has been presented in Chapter 5, as well as the procedures of XML data importing into Excel 2003 sheets. The solution of the problem of exporting of an Access 2003 table into Excel 2003 using XML is given in Chapter 6.