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

Overview

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

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

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

After a billing cycle expires, you can renew your ECS instance to continue using the resources. For more information, see Renewal overview.

Applicable resources

Currently, subscription-based billing is available for the following ECS resources:
  • ECS instances
  • Images
  • Disks
  • Internet bandwidth (Pay-By-Bandwidth)
In addition to the instance type, you must also configure the block storage, image, and network type when you create an instance. The images and cloud disks created along with the subscription ECS instance also use subscription-based billing. However, you can select the billing method for network usage.
Note After creating a subscription ECS instance, you can create subscription cloud disks for the instance or attach separately created pay-as-you-go cloud disks to it. For more information, see Create a subscription disk and Attach a cloud disk.
You can view the total price of the preceding resources in the lower left part of the instance creation page.
In the preceding figure,
  • Total price is the price of the following resources:
    • ECS instances
    • Disks
    • Internet 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 Internet bandwidth. For more information, see Billing of Internet bandwidth.
  • Image Fees indicates that you selected a paid image when creating the instance.

You can use the ECS TCO Calculator to quickly 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 billing cycles 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 charged separately. You must pay these fees before you can use the resources. You can calculate the total price based on the configurations you choose. The following table provides the formulas used to calculate the fee of each ECS resource.
Resource Formula Unit price
ECS instances Unit price of an instance type × Subscription duration For more information, see Instance Fee on ECS Pricing.
Note Local disks attached to an instance are billed together with the instance.
Images Image unit price × Subscription duration You can view the price on the purchase page and in the Alibaba image marketplace.
Cloud disks (system disks) Disk unit price × Disk capacity × Subscription duration For more information, see Storage Fee > System Disk on ECS Pricing.
Note The price for a pay-as-you-go disk on the page is USD/100 GiB/hour. Divide it by 100 to obtain the unit price per GiB.
Cloud disks (data disks) Disk unit price × Disk capacity × Subscription duration For more information, see Storage Fee > Data Disk on ECS Pricing.
Note The price for a pay-as-you-go disk on the page is USD/100 GiB/hour. Divide it by 100 to obtain the unit price per GiB.
Internet bandwidth (Pay-By-Bandwidth) Bandwidth unit price × Bandwidth value × Subscription duration

For more information, see Billing of Internet bandwidth.

Fixed bandwidth uses the tiered billing method. You can select a bandwidth value on the purchase page to view the changes in fees.
The following figure shows the procedure for calculating the price of a subscription ECS instance that is created in China (Qingdao) with a subscription duration of three months.
Note The price is for reference only. For the exact price, visit the links provided in the preceding table.

Changes in resource status after expiration

If the auto renewal function is not enabled, the instance stops providing services at any time from 00:00:00 of the expiration date to 00:00:00 the next day.
Note You cannot enable auto renewal for an expired subscription ECS instance.
The following table describes the resource status after the instance expires.
Resource Within 15 days after expiration More than 15 days after expiration
ECS instances The ECS instance is retained but it cannot be used.
Note After the instance stops providing services, you cannot connect to the instance remotely, or access websites deployed on the instance. Service errors will occur.
The ECS instance is released.
Images Images are unavailable. Images are unavailable.
Block storage
  • Cloud disks and data on them are retained, but the cloud disks cannot be used.
  • Local disks and data on them 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 them cannot be restored.
    Note If you manually attach a pay-as-you-go cloud disk to the subscription instance and set the release mode to "not release with instance", the pay-as-you-go cloud disk stops working.
  • Local disks are released and data on them cannot be restored.
  • Shared Block Storage devices are automatically detached.
Public IP addresses
  • Instances in classic networks: Fixed public IP addresses are retained.
  • Instances in a VPC
    • Fixed public IP addresses are retained.
    • The EIP associated with the instance is not affected.
  • Instances in classic networks: Fixed public IP addresses are released.
  • Instances in a VPC
    • Fixed public IP addresses are released.
    • The EIP is disassociated from the instance.

If you have enabled the auto renewal function for your subscription ECS instance but the renewal fails, the instance automatically stops operating 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 after the instance expires.
Resource Within 15 days after expiration More than 15 days after expiration More than 30 days after expiration
ECS instances The instance is retained and working properly.
Note When the instance works properly, you can start or stop the instance, and connect to the instance remotely or by using the management terminal of the ECS console.
The ECS instance is retained but it cannot be used.
Note After the instance becomes unavailable, you cannot connect to the instance remotely, or access websites deployed on the instance. Service errors will occur.
The ECS instance is released.
Images Images are available. Images are unavailable. Images are unavailable.
Block storage
  • Cloud disks and data on them are retained. The cloud disks can work properly.
  • Local disks and data on them 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 them are retained, but the cloud disks cannot be used.
  • Local disks and data on them 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 them cannot be restored.
    Note If you manually attach a pay-as-you-go cloud disk to the subscription instance and set the release mode to "not release with instance", the pay-as-you-go cloud disk stops working.
  • Local disks are released and data on them cannot be restored.
  • Shared Block Storage devices are automatically detached.
Public IP addresses
  • Instances in classic networks: Fixed public IP addresses are retained.
  • Instances in a VPC
    • Fixed public IP addresses are retained.
    • The EIP associated with the instance is not affected.
  • Instances in classic networks: Fixed public IP addresses are retained.
  • Instances in a VPC
    • Fixed public IP addresses are retained.
    • The EIP associated with the instance is not affected.
  • Instances in classic networks: Fixed public IP addresses are released.
  • Instances in a VPC
    • Fixed public IP addresses are released.
    • The EIP is disassociated from the instance.