Cloudyn cost reports enable you to identify your reserved instance purchases as well as distinguish between its upfront payments and subsequent payments. This is possible by using our Price Model and Cost Type groupings.
Price Model - Any payment related to the RI cost is categorized in the Price Model filter as Reservation. This applies to both upfront payments made on the purchase date as well as subsequent payments made during the life of the RI. The only exception to this is unused RI hours which are categorized as Unused Reservation.
Cost Type - The upfront payments made on the purchase date of all upfront and partial upfront RI's are categorized in the Cost Type filter as a One Time Fee. All non upfront payments made during the life of an RI are categorized as a Usage Cost.
In the example below, I have filtered to an account that recently made a partial upfront RI purchase on the 6th. I have filtered to this RI's instance type/platform/region and grouped the results by Price Model and Cost Type.
On the 5th, all charges are still On Demand
On the 6th, the RI purchase was made in the middle of the day so results include the On Demand Usage Cost that preceded the RI purchase, the Reservation One Time Fee, and the Reservation Usage Cost for the non-upfront payment of the RI
On the 7th and 8th, the RI is in full use so the only cost is the Reservation Usage Cost
On the 9th, the RI went unused for part of the day so in addition to the Reservation Usage Cost, there is also Unused Reservation Usage Cost that reflects the hours the RI was unused.