Vehicle rental system

The invention relates to a method for the computer-aided operation of a vehicle rental system. In said method, a number of vehicles are provided to a defined user group for temporary use. The vehicles (50a, 50b, 51b) are provided at one or more locations accessible only to the user group, each location having one or more parking spaces reserved for the vehicles (50a, 50b, 51b). On the basis of a user input, which comprises at least information about the start and end of a rental period of a vehicle (50a, 50b, 51b), and a user identifier, the vehicle (50a, 50b, 51b) is booked in a computer-aided booking system (10). Furthermore, a sensor system (30a) that monitors the parking spaces (22a, 23a, 24, 22b, 23b, 24b, 25b) determines the presence of the vehicles (50a, 50b, 51b). A vehicle (50a, 50b, 51b) that is detected as parked at one of the reserved parking spaces (22a, 23a, 24, 22b, 23b, 24b, 25b) by the sensor system (30a) before the rental end stored in the booking system (10) has been reached is indicated by