Abstract: The invention relates to a method for managing customer accounts in connection with a Pre-Paid platform (8). According to the method the applications (3) communicate with the Pre-Paid platform (8). According to the invention, the applications (3) are arranged to communicate with a proxy (4) and the Pre-Paid platform correspondingly (8) with a charging module (5), in which case the proxy (4) and the charging module (5) communicated with each other in a logically predefined manner, in which case the proxy (4) is used to collect and manage the charging data and related information of the services used by the customers, and the charging module (5) is used to charge the customer's Pre-Paid account, which is located on the Pre-Paid platform (8), or in a system behind it.