Subscription is a billing method that allows you to use resources only after you pay for them. With subscription, you can reserve resources in advance and reduce your costs with the discounted rates. This topic describes the billing rules for subscription ECS resources.

Overview

Before you use subscription resources, you must create a subscription ECS instance. The following figure shows subscription durations that you can choose for your ECS instance.

During instance creation, resources are billed separately to generate the total price. You can use subscription resources only after you pay the total price. For more information about how prices are calculated, see Billing.

After a subscription ECS instance is created, you can change its specifications or resize subscription cloud disks attached to the instance. For more information, see Overview of instance upgrade and downgrade and Overview.

After a subscription period expires, you can renew your ECS instance to continue to use it. For more information, see Renewal overview.

Applicable resources

When you create an ECS instance, you must configure the instance type, Block Storage devices, image, and network type. The following table describes the ECS resources that support the subscription billing method.
Resource Description
ECS instance When you create an ECS instance, you must specify whether to use the subscription billing method.
Image Images created along with subscription ECS instances also use the subscription billing method.
Block Storage Block Storage devices created along with subscription ECS instances also use the subscription billing method.

After a subscription ECS instance is created, you can create subscription disks for the instance or attach pay-as-you-go disks that are separately created to the instance. For more information, see Create a subscription disk and Attach a data disk.

Public bandwidth (pay-by-bandwidth) If you select pay-by-bandwidth as the billing method for network usage when you create a subscription ECS instance, the bandwidth is also billed on a subscription basis. For more information, see Billing methods of public bandwidth.
You can view the total price of the preceding resources in the lower-left part of the instance buy page, as shown in the following figure.
  • Total price is the price of the following resources:
    • ECS instance
    • Cloud disks
    • Public bandwidth (pay-by-bandwidth)
      Note If you select pay-by-traffic as the billing method for network usage, the total price does not include the price for public bandwidth. For more information, see Billing methods of public bandwidth.
  • Image Fees indicates that you selected a paid image when you create the instance.

You can use the ECS TCO Calculator to analyze your cloud migration costs.

Billing

The billing cycle is the time commitment you made when you purchased the subscription instance (based on UTC+8:00). The cycle starts from the time when the purchased subscription resources are activated or renewed (accurate to seconds) and ends at 00:00:00 the next day after the expiration date.

For example, you created a subscription ECS instance at 13:00:00 on August 9, 2019. Related resources include the ECS instance, image, and cloud disk (system disk). You select a subscription duration of one month and manually renew the instance with another one-month commitment. The subscription periods are as follows:
  • The first billing cycle is from 13:00:00 on August 9, 2019 to 00:00:00 on September 10, 2019.
  • The second billing cycle is from 00:00:00 on September 10, 2019 to 00:00:00 on October 10, 2019.
ECS resources are billed separately. You must pay these fees before you can use the resources. You can calculate the total price based on the configurations that you choose. The following table provides the formulas used to calculate the fee of each ECS resource.
Resource Formula Unit price
ECS instance Unit price of an instance type × Subscription duration For more information, see Instance Fee on the ECS Pricing tab.
Note Local disks attached to an instance are billed together with the instance.
Image Unit price of an image × Subscription duration For more information about the price, see the buy page or Alibaba Cloud Marketplace.
Cloud disk (system disk) Unit price of a disk × Disk capacity × Subscription duration For more information, see Storage Fee > System Disk on the ECS Pricing tab.
Note The price on the page is displayed in the USD/100 GiB/hour format. Divide it by 100 to obtain the unit price per GiB.
Cloud disk (data disk) Unit price of a disk × Disk capacity × Subscription duration For more information, see Storage Fee > Data Disk on the ECS Pricing tab.
Note The price on the page is displayed in the USD/100 GiB/hour format. Divide it by 100 to obtain the unit price per GiB.
Public bandwidth (pay-by-bandwidth) Unit price of bandwidth × Bandwidth value × Subscription duration

For more information, see Billing methods of public bandwidth.

The bandwidth uses a tiered billing model. You can select a bandwidth value on the buy page to view the changes in fees.
For example, you created a subscription ECS instance in China (Qingdao) with a subscription duration of three months. The following figure shows the process for calculating the price of the subscription ECS instance.
Note The price is only for reference. For more information about the exact price, visit the links in the preceding table.

Changes in resource status after expiration

Notice After an ECS instance expires, the instance may be stopped. The system may send you notifications that you have overdue payments. In this case, renew your instance to ensure service availability. If you still have problems, submit a ticket.
If the auto-renewal feature is not enabled for a subscription ECS instance, the instance stops to provide service at any time from 00:00:00 on the expiration date to 00:00:00 the next day.
Note You cannot enable the auto-renewal feature for an expired subscription ECS instance.
The following table describes the resource status of an ECS instance after expiration.
Resource Within 15 days after expiration More than 15 days after expiration
ECS instance The ECS instance is retained but cannot be used.
Note After an ECS instance becomes stopped, you cannot connect to the instance remotely, or access websites deployed on the instance. Service errors may occur.
The ECS instance is released.
Image The image is unavailable. The image is unavailable.
Block Storage
  • Cloud disks and data on the disks are retained, but the cloud disks cannot be used.
  • Local disks and data on the disks are retained, but the local disks cannot be used.
  • Share Block Storage devices and data on them are retained, but the devices cannot be used.
  • Subscription disks are released and data on the disks cannot be restored.
    Note If you manually attach a pay-as-you-go cloud disk to a subscription instance and do not set the release mode to Release with Instance, the pay-as-you-go cloud disk stops to work.
  • Local disks are released and data on the disks cannot be restored.
  • Shared Block Storage devices are automatically detached.
Public IP address
  • In the classic network: The public IP address is retained.
  • In a VPC:
    • The public IP address is retained.
    • The EIP associated with the instance is not affected.
  • In the classic network: The public IP address is released.
  • In a VPC:
    • The public IP address is released.
    • The EIP is disassociated from the instance.

If the auto-renewal feature is enabled for a subscription ECS instance, but the renewal fails, the instance automatically stops to provide service at any time from 00:00:00 on the 15th day after expiration to 00:00:00 on the 16th day after expiration.

The following table describes the resource status of an ECS instance after expiration.
Resource Within 15 days after expiration More than 15 days after expiration More than 30 days after expiration
ECS instance The ECS instance is retained and works properly.
Note When an ECS instance works properly, you can start or stop the instance, and connect to the instance remotely from the ECS console or by using other connection methods.
The ECS instance is retained but cannot be used.
Note After an ECS instance becomes stopped, you cannot connect to the instance remotely, or access websites deployed on the instance. Service errors may occur.
The ECS instance is released.
Image The image is available. The image is unavailable. The image is unavailable.
Block Storage
  • Cloud disks and data on the disks are retained. The cloud disks can work properly.
  • Local disks and data on the disks are retained. The local disks can work properly.
  • Share Block Storage devices and data on them are retained. The devices can work properly.
  • Cloud disks and data on the disks are retained, but the cloud disks cannot be used.
  • Local disks and data on the disk are retained, but the local disks cannot be used.
  • Share Block Storage devices and data on them are retained, but the devices cannot be used.
  • Subscription disks are released and data on the disks cannot be restored.
    Note If you manually attach a pay-as-you-go cloud disk to a subscription instance and do not set the release mode to Release with Instance, the pay-as-you-go cloud disk stops to work.
  • Local disks are released and data on the disks cannot be restored.
  • Shared Block Storage devices are automatically detached.
Public IP address
  • In the classic network: The public IP address is retained.
  • In a VPC:
    • The public IP address is retained.
    • The EIP associated with the instance is not affected.
  • In the classic network: The public IP address is retained.
  • In a VPC:
    • The public IP address is retained.
    • The EIP associated with the instance is not affected.
  • In the classic network: The public IP address is released.
  • In a VPC:
    • The public IP address is released.
    • The EIP is disassociated from the instance.

Overdue payments

If you have overdue payments under your account, the subscription ECS resources can be used properly, but you cannot purchase, renew, or upgrade instances.