BusPlus was the payment method for the GSP Belgrade, Belgrade tram system, Lasta Beograd and BG TRAIN. It is a thin, plastic card on which the customer electronically loads fares. BusPlus was managed by Apex Technology Solutions. Public authorities state that BusPlus was implemented to increase the revenue of the public transit authority and to improve the public transport system by getting better information on its usage. Reports from September 2012 have indicated that the overall revenue has increased, but some aspects of its integration have been criticized by the public. The system was installed by Kentkart, an automatic fare collection system integrator company. This system was abolished in April 2023 after Belgrade terminated the contract with the company Kentkart, which implemented the system, by the decision of Mayor Aleksandar Šapić. In May, a new system, Beograd plus, was established.
