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Amazon Elastic Compute Cloud
User Guide for Windows Instances

Buying Reserved Instances

You can search for specific types of Reserved Instances to buy, adjusting your parameters until you find the exact match that you're looking for.

It's important to note the following for any Reserved Instance purchase:

  • Usage fee—With Reserved Instances, you pay for the entire term regardless of actual use.

  • Tiered discounts on purchases—Pricing tier discounts apply only to AWS Standard Reserved Instances purchases. These discounts do not apply to purchases of third-party Reserved Instances or to Convertible Reserved Instances. For more information, see Understanding Reserved Instance Discount Pricing Tiers.

  • Cancellation of purchase—After the purchase is confirmed, it cannot be canceled. Before you confirm, review the details of the Reserved Instances that you plan to buy, and make sure that all the parameters are accurate. However, you may be able to sell the Reserved Instances if your needs change and you meet the requirements. For more information, see Selling in the Reserved Instance Marketplace.

After you select Reserved Instances to buy, you receive a quote on the total cost of your selections. When you decide to proceed with the purchase, AWS automatically places a limit price on the purchase price. The total cost of your Reserved Instances won't exceed the amount that you were quoted.

If the price rises or changes for any reason, you are returned to the previous screen and the purchase is not completed. If, at the time of purchase, there are offerings similar to your choice but at a lower price, AWS sells you the offerings at the lower price.

Buying Standard Reserved Instances Using the AWS Management Console

You can buy Standard Reserved Instances with or without a capacity reservation.

To buy Standard Reserved Instances using the AWS Management Console

  1. Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/.

  2. In the navigation pane, choose Reserved Instances, Purchase Reserved Instances.

  3. Choose Offering Class, choose Standard to display Standard Reserved Instances.

  4. To purchase a capacity reservation, choose Only show offerings that reserve capacity in the top-right corner of the purchase screen.

  5. Select other configurations as needed and choose Search.

    Note

    The Seller column in the search results shows whether the seller is a third party. If so, the Term column displays non-standard terms.

  6. Select the Reserved Instances to purchase, enter the quantity, and choose Add to Cart.

  7. To see a summary of the Reserved Instances that you selected, choose View Cart.

  8. To complete the order, choose Purchase.

Note

If, at the time of purchase, there are offerings similar to your choice but with a lower price, AWS sells you the offerings at the lower price.

To apply your reservation, launch an On-Demand Instance, ensuring that you match the same criteria that you specified for your Reserved Instance. AWS automatically charges you the lower hourly rate. You do not have to restart your instances.

To view transaction status using the AWS Management Console

  1. Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/.

  2. Choose the Reserved Instances page. The status of your purchase is listed in the State column. When your order is complete, the State value changes from payment-pending to active.

Buying Convertible Reserved Instances Using the AWS Management Console

You can buy Convertible Reserved Instances with or without a capacity reservation.

To buy Convertible Reserved Instances using the AWS Management Console

  1. Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/.

  2. In the navigation pane, choose Reserved Instances.

  3. On the Reserved Instances page, choose Purchase Reserved Instances.

  4. Select Offering Class and choose Convertible to display Convertible Reserved Instances.

  5. To purchase a capacity reservation, choose Only show offerings that reserve capacity in the top-right corner of the purchase screen.

  6. Select other configurations as needed and choose Search.

  7. Select the Convertible Reserved Instances to purchase, enter the quantity, and choose Add to Cart.

  8. To see a summary of your selection, choose View Cart.

  9. To complete the order, choose Purchase.

Note

If, at the time of purchase, there are offerings similar to your choice but with a lower price, AWS sells you the offerings at the lower price.

The billing benefit is automatically applied to matching On-Demand Instances with matching specifications, in the specified region. AWS automatically charges you the lower hourly rate. You do not have to restart your instances.

To view transaction status using the AWS Management Console

  1. Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/.

  2. Choose the Reserved Instances page. The status of your purchase is listed in the State column. When your order is complete, the State value changes from payment-pending to active.

Buying Reserved Instances Using the Command Line Interface or API

To buy Reserved Instances using the command line or API

  1. Using the AWS CLI, see purchase-reserved-instances-offering

  2. Using the AWS Tools for Windows PowerShell, see New-EC2ReservedInstance

  3. Using the Amazon EC2 API, see PurchaseReservedInstancesOffering

To view transaction status using the command line or API

  1. Using the AWS CLI, see describe-reserved-instances

  2. Using the AWS Tools for Windows PowerShell, see Get-EC2ReservedInstance

  3. Using the Amazon EC2 API, see DescribeReservedInstances

Applying Reserved Instances

Reserved Instances are automatically applied to running On-Demand Instances provided that the specifications match. You can use the AWS Management Console, a command line tool, or the Amazon EC2 API to perform any of these tasks.

Note

To purchase and modify Reserved Instances, ensure that your IAM user account has the appropriate permissions, such as the ability to describe Availability Zones. For information, see Example Policies for Working With the AWS CLI or an AWS SDK and Example Policies for Working in the Amazon EC2 Console.

Purchase—Determine how much capacity to reserve. Specify the following criteria:

  • Platform (for example, Linux).

    Note

    To use your Reserved Instance on a specific platform (for example, Windows, Linux/Unix), you must identify the platform when you purchase the reserved capacity. Then, when you launch your instance with the intention of using the capacity you purchased, you must choose the Amazon Machine Image (AMI) that runs that specific platform, along with any other specifications that you identified during the purchase.

  • Instance type (for example, m1.small).

  • Scope of the reservation (Region or Availability Zone).

  • Term (time period) over which to reserve capacity.

  • Tenancy. You can reserve capacity for your instance to run on single-tenant hardware (dedicated tenancy, as opposed to shared). The tenancy you select must match the tenancy of the On-Demand Instance to which you're applying, or plan to apply, the Reserved Instance. For more information, see Dedicated Instances.

  • Offering Class (Standard or Convertible).

  • Offering (No Upfront, Partial Upfront, All Upfront).

Use—To use your Reserved Instance, launch an On-Demand Instance with the same specifications as the reservation you purchased. The pricing benefits and capacity reservations automatically apply to any matching instances you have that aren't already covered by a reservation.

For more information, see Launch Your Instance.

Reserved Instance States

Reserved Instances can be in one of the following states:

  • active—The Reserved Instance is available for use.

  • payment-pending—AWS is processing your payment for the Reserved Instance. You can use the Reserved Instance when the state becomes active.

  • retired—The Reserved Instance has been terminated for any of the following reasons:

    • AWS did not receive your payment. For example, the credit card transaction did not go through.

    • The Reserved Instance term expired.

It's important to note that status information displayed for State on the Reserved Instance page is different from the status information displayed for Listing State on the My Listings tab.

If you are a seller in the Reserved Instance Marketplace the Listing State displays the status of a reservation that's been listed in the Reserved Instance Marketplace. For more information, see Reserved Instance Listing States.