1. A method for allocating calls in an elevator group comprising a plurality of elevators and at least one group control unit, wherein: the actual usage of each elevator is recorded; the group control unit executes at least one allocation algorithm for selecting which elevator of the elevator group is used to serve a call; the allocation algorithm is configured to compare the actual usage of at least two elevators against respective target usages and to select the elevator having its actual usage most deviating from the target usage to serve an outstanding call.