Reserved Instance Planner Report

The Reserved Instance Planner Report shows how you can reduce your cloud bill through Reserved Instances, which provide a significant discount compared with on-demand pricing. Based on your instance uptime, the report recommends Reserved Instance purchases for each combination of operating system, instance type, and region and shows you the projected savings for each purchase.

Note: Commander also generates Reserved Instance purchase recommendations.

By default, the report includes data for all VMs for which at least one billing record was generated during the period. Templates are not included in the report.

Report data is based on VM history data (costs are calculated based on VM uptime and the applied cost model) or, if cloud billing data was retrieved, on cloud billing data.

Best Practice: To achieve the most accurate results in the Reserved Instance Planner Report make sure to retrieve an hourly AWS billing report.

Note: This report doesn't support any markup and discount cost adjustments you have made to the cost model and isn't expected to be exposed for Service Portal users.

Planning your Reserved Instance purchases

It's critical to plan your Reserved Instance purchases carefully so that you purchase the right type and size of RI. To that end, we recommend the following:

  • Run the Reserved Instance Planner report a few days before the end of the month.
  • Discuss the report's recommendations with the owners of the target instances to ensure that each RI is a good fit.
  • Purchase the recommended RI on the first day of the month to ensure that your RIs will always expire at the end of a month.

See Cloud Expense Management to learn about other cloud expense management features that are available to reduce your cloud bill.

Report settings

Access through:

Reports > Chargeback & IT Costing > Reserved Instance Planner

Available to:

All Access Rights Levels

Report Period: Select a report period of 7, 30, 60 or 90 days. The period ends at midnight on the day before the report is run (in contrast to other Commander reports).

Purchase Model: AWS OnlySelect one of the following purchase models:

  • All Upfront: Pay for the entire reservation term in one upfront payment. Offers the highest savings rate.
  • Partial Upfront: Pay for part of the reservation term in an upfront payment, then pay the remainder in monthly installments. Costs more than All Upfront, but less than No Upfront.
  • No Upfront: Pay for the reservation in monthly installments throughout the term's duration. Offers the lowest savings rate.

Purchase Term: Select one or three year reserved instances

Type: AWS OnlySelect stadard or convertible reserved instances

Include Detailed Data: Select Yes if you want the report to include tables that show the detailed calculations used for each combination of operating system, instance type and region.

Limit Spending To: When you enter a value in this field, the report will cap the spending at the specified limit. This option is useful if you already know the amount you can spend on Reserved Instances. A value of 0 means that there is no spending limit, and all purchases are included in the report, regardless of cost.

Required Savings %: By default, Commander must determine that a Reserved Instance purchase will save you at least 20% over the on-demand cost in order to recommend a purchase.

Sort Purchases By: By default, the recommended purchases are sorted by Projected Savings. You can also choose to sort by Purchase Cost or Savings Percentage.

Comment: Comments are helpful for distinguishing reports of the same type in the list of generated reports.

Add Advanced Filters: You can filter the report by one or more cloud accounts.

Understanding the report

The On-Demand Annual Costs are based on the cost model configured for the cloud account. A few examples:

  • If four instances were running for the entire reporting period, the On-Demand Annual Cost is:

    annual VM cost * 100% * 4

  • If four instances were running for half of the reporting period, the On-Demand Annual Cost is:

    annual VM cost * 50% * 4

  • If two instances were running for half of the reporting period, and two VMs running for the entire reporting period, the On-Demand Annual Cost is:

    (annual VM cost * 50% * 2) + (annual VM cost * 100% * 2)

The Reserved Instance Annual Costs are based on a one or three year term with the selected Purchase Model (AWS Only - All Upfront, Partial Upfront or No Upfront).

In the optional details tables in the lower part of the report, the element Running Instance Count is the number of running instances of each combination of instance type, OS and region. The element Running Instance Count Frequency (%) is the percentage of time that at least this number of instances were running.