The paper in an attempt at analysing the hitherto experiences in IACS system implementation in Poland. The Integrated Administration and Control System is the measure of the European Common Agricultural Policy (CAP) funds distribution in the field of direct payments. It is divided into two parts: informatics one and the technical and organisational one and it is operated by the Agency of Restructuring and Modernisation of Agriculture in Poland. There are some barriers to its functioning, but there seems to be enough time (2004-2006) of initial functioning of the system to overcome the problems. The author proposes some solutions facilitating the system's implementation and making its operation more efficient. In this context the paper describes the role of direct payments in CAP instruments and emphasises the evolution of EU measures in the area.