Blended rates - Amazon EC2 Reserved Instances and Other AWS Reservation Models

Blended rates

A line item for the blended rate of that instance is displayed on the bill of any member account that is running an instance that matches the specifications of a reservation in the organization.

The payer account of an organization can turn off Reserved Instance sharing for member accounts in that organization via the AWS Billing Preferences. This means that Reserved Instances are not shared between that member account and other member accounts. Each estimated bill is computed using the most recent set of preferences. For information on how to configure sharing, see Turning Off Reserved Instance Sharing.