During the process of implementation of Euro into the Budget Information system of Ministry of Finance as a key been proved to be preparatory phase. In this phase were identified important conditions that later on had a significant impact for further development and final look of the solution. Among new functionalities that were being added according to plan of implementation of euro in certain phases, were dual visualisation, modified printed compositions and a way of portraying data that are taken out of external systems. The end of lecture will be enrichen by summary of used principles and recommendations for solution teams working on similar tasks.