This topic describes how to downgrade the specifications of a subscription instance when you renew the instance. The new specifications take effect in the next billing cycle. The original specifications remain unchanged for the rest of the current billing cycle.

Background information

You can also use the Renewal and Downgrade feature to complete the following tasks:
  • Downgrade the instance specifications.
  • Change the billing method of data disks from subscription to pay-as-you-go.
  • Change the billing method for network usage from Pay-By-Bandwidth to Pay-By-Traffic.
  • Adjust the Internet bandwidth.
When you use the Renewal and Downgrade feature, the following limits apply:
  • If you perform the following operations during the instance renewal, you must restart the ECS instance in the ECS console or by calling the RebootInstance operation within the first seven days of the next billing cycle for the new specifications to take effect. If you restart the instance on the seventh day of the new billing cycle, the ECS instance uses the original high specifications for the first six days.
    • Downgrade the instance specifications.
    • Adjust the Internet bandwidth. The first time you increase the bandwidth value of a classic network-type instance from 0 Mbit/s, you must restart the ECS instance.
  • You cannot perform the following operations after the renewal and downgrade:


  1. Log on to the ECS console.
  2. In the left-side navigation pane, choose Instances & Images > Instances.
  3. In the top navigation bar, select a region.
  4. Find the target subscription instance. In the Actions column, click Upgrade/Downgrade.
  5. In the Upgrade/Downgrade Wizard dialog box, select Renewal and Downgrade and click Continue.
  6. On the Renewal and Downgrade page, complete the following operations:
    1. Select an instance type.
      For instance types that support specifications change, see the information displayed on the page.
    2. Set the instance restart time.
      This setting is only mandatory when you change the instance specifications. The restart time cannot be later than the 7th day of the next billing cycle. We recommend that you set the restart time to a point in time during off-peak hours.
    3. Change the billing method of data disks from subscription to pay-as-you-go.
      If the billing method remains unchanged, the data disks have the same billing cycle as the instance in the next billing cycle.
    4. Set Internet bandwidth.
      Current billing method Supported operation
      • Reduce the bandwidth value.
        Reducing the bandwidth value to 0 Mbit/s has the following impacts on public IP addresses:
        • For classic network-type ECS instances, public IP addresses remain unchanged.
        • For VPC-type ECS instances, public IP addresses are released when the next billing cycle begins.
      • Change the billing method to Pay-By-Traffic and set peak bandwidth.
      Pay-By-Traffic You can set the peak bandwidth based on your specific needs.
    5. Set the renewal duration.
  7. Read and confirm ECS Terms of Service. Then, click Create Order.
  8. Follow the instructions to complete payment.