The events in the established custome were alloted from nenryo (annual tribute) and ritsubun (ritsubun 〔the tax system where two-tenth of the tax delivered from the provinces to the Ministry of Finance at Heian-kyo were supplied to the tax storage called "ritsubun-do"〕) that is said to have replaced yo and cho, and the extra events were borne by each province in form of meshimono or shoka (imposition) allocated by gyojisyo or kurodo dokoro (the Office of Imperial Household Logistics).
恒例の行事については、庸や調を継承したとされる年料・率分によって賄われ、臨時の行事については行事所や蔵人所が召物・所課などの形式で諸国に負担を配分した。