Raters will be charged a flat fee per rating, based on the volume of ratings submitted the previous year to the RESNET Registry. This includes the $13 to $14 per rating software licensing and service fees, charged by Noresco or Ekotrope, and the per rating registry fee charged by RESNET. These are subject to change by each respective party. This also covers the annual file QA performed by PSD and required by RESNET. The number of ratings is accrued on a calendar year.