The shokan was responsible for collecting the nengu and kuji (public duties) for the shoen landholder, but the kyuden were exempt from all nengu and kuji, and the exempt portion was the income of the kyuden right holder.
荘官は荘園領主へ年貢・公事を貢納する義務を負っていたが、給田については年貢・公事がすべて免除され、免除分が給田権利者の収入となった。