In one aspect, implementing enhanced QoS for multiple replication sessions in a replication setup includes, for each of a number of replication sessions simultaneously implemented via the storage system, determining an assigned priority level and calculating a corresponding resource profile. The resource profile specifies a minimum required amount of bandwidth and a minimum amount of input/output (IO) operations for the replication session. An aspect also includes determining available system resources for an aggregate of the replication sessions. The available system resources indicate a maximum available amount of bandwidth and a maximum available IO rate across the storage system. An aspect further includes apportioning resources among the replication sessions as a function of collective priority levels, resource profiles, and the available system resources.