Understanding coverage metrics and calculations - Savings Plans
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Understanding coverage metrics and calculations

You can find the following high-level metrics in the Coverage report section:

  • On-Demand spend not covered – The amount of eligible savings spend that was not covered by Savings Plans or Reserved Instances over the lookback period.

  • Average coverage – The aggregated Savings Plans coverage percentage based on the selected filters and look-back period.

  • Potential monthly savings vs On-Demand – Your potential savings amount based on your Savings Plans recommendations. This is shown as a monthly amount.

Coverage is calculated as:

(On-Demand equivalent of usage covered by your Savings Plans)

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(On-Demand equivalent usage covered by your Savings Plans + Savings Plans eligible amount that was billed at On-Demand rates)

For example, if you are running 10 identical instances with an On-Demand price of CNY 8/hour, and 9 of the 10 instances that you're running are covered by your Savings Plans commitment, your coverage would be 90 percent.

(9 Savings Plans covered instance * CNY 8/hour OD rate)

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(9 Savings Plans covered instances * CNY 8/hour OD rate + 1 On-Demand Instance * CNY 8/hour OD rate)

You can see your usage at an hourly, daily, or monthly granularity. Usage is calculated using your selected lookback period. You can customize your filters by member account, Amazon Region, instance family, service, and cost category in the Filters section.

If you’re a user in the management account, you can see the aggregated coverage for the entire Consolidated Billing family.