Understanding AWS projected cost dimension in cost history reports

Products

• CloudHealth

Issue/Introduction

Please see below for a breakdown of how AWS projected cost dimension are calculated.

Resolution

For AWS, the platform calculates the Projected Cost as the sum of the following individual costs:

• Already incurred costs: Current month's month-to-date (MTD) costs, excluding support & unused RI costs
• Projected unused RI costs: Previous month's unused RI costs. The assumption here is that the same amount of unused RI costs will be incurred in the current month.
• Projected recurring costs: (Number of days remaining in the current month) x (Weighted average of previous and current month's recurring costs)
  The assumption here is that for every day in the remainder of the month, the daily average recurring costs will be similar to those incurred in the previous month / MTD costs.

• Projected support costs: 

  • Projected support costs for direct or passed through partner billing engine unaltered are sourced as-is from the current month's cost.

  • Projected support costs generated or altered by the partner billing engine are sourced from the previous month's support cost.

For more information regarding support cost calculation, please see: https://aws.amazon.com/premiumsupport/pricing/