[PROD] charge Usage Realtime Message and Connections ?

I see account prod have 5 milions Realtime Message and 500 Connections . But my project have 1000 connections and may be 6-7 milions messsages . Supabase charge me ussage when ??? . After 1 month or realtime connections or realtime messsage > 5 milions or > 500 connections ???