Understanding your recommendation calculations
Savings Plans recommendations examine your usage over a selected time period. Based on the usage, we calculate what your bill could have been if you had purchased an additional Savings Plans commitment for that time period. We identify and recommend the commitment value that we estimate will result in the largest savings.
Important
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The recommendations don’t forecast your usage. Recommendations are based on your historical usage over the selected lookback period. Be sure to select a lookback period that reflects your future usage. Recommendations don't account for any queued or scheduled purchases because recommendations are based on the usage in the lookback period. Recommendations are also generated for immediate purchases, and not for future purchases.
Recommendations are calculated based on your Reserved Instances and Savings Plans discount sharing preferences. To view or change your preferences, see Turning off reserved instances and Savings Plans discount sharing in the AWS Billing User Guide.
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Recommendations at the management account level are calculated considering usage across all of the accounts in your AWS organization that have Reserved Instances or Savings Plans discount sharing enabled, to recommend a commitment that maximizes savings across accounts. Member account recommendations are calculated at the individual account level, to maximize savings for each isolated account.
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Recommendations are generated for customers that have an average On-Demand spend of $0.10/hour during the lookback period (7, 30, or 60 days). If you recently purchased a Savings Plan, returned a Savings Plan, or if your Savings Plans recently expired, refresh your Savings Plans recommendations to take your current Savings Plans inventory and latest usage data into account.
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Compute and EC2 Instance Savings Plans recommendations are created using the same set of usage. You can purchase both Compute Savings Plans and EC2 Instance Savings Plans to cover your usage, but the two sets of recommendations are not meant to be taken together simultaneously.
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Recommendations are calculated using Savings Plans rates referenced in Pricing with Savings Plans
.