The paper describes the process of implementing "Online payment" at a retail enterprise, as well as automation of trade using 1C: Enterprise 8 software. Relevance is due to the fact that the Federal Act №54 of 22.05.2003 entered into force are the most global changes in the world of trade, as a result of which this topic is obviously problematic for both entrepreneurs and the state. This work includes two stages: the design of the organization's activities to determine the solutions to automate activities (IDEF0 notation was used for building models) and a description of the process of improving trading activity. In turn, the process of improving trading activity also divided into stages: the installation of "Online cash register" and cash register equipment and the process of implementing data exchange between the central database and stores using a distributed information base.