You can downgrade the instance type of a subscription instance in real time. Start the instance after it is downgraded to make the change take effect.


An instance can be downgraded only when it meets the following conditions:
  • The billing method of the instance is subscription.
  • Your account has no overdue payments for the instance.
  • The instance is in the Stopped (Stopped) state.
  • The instance is not expired, to be released, or locked.
  • The instance has no ongoing downgrade or renewal process.

Background information

A downgrade may result in a refund. You can calculate the refund amount by using the following formula: Refund amount = Remaining amount of the configuration fee before the downgrade - Price of the new configurations.

When you downgrade the instance type of a subscription instance in real time, the following limits apply:
  • Whether the downgrade feature is supported depends on your ECS usage.
  • You can only downgrade the instance type of one subscription instance in real time at a time.
  • You can only downgrade a subscription instance to instance types with lower specifications. You cannot upgrade subscription instances to instance types of equal or higher specifications.
  • Each subscription instance can be downgraded a maximum of three times. Downgrade operations include instance specifications downgrades, bandwidth downgrades, and the change of the disk billing method from subscription to pay-as-you-go.
  • You must wait at least five minutes between two consecutive downgrade operations.


  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 instance. Click Upgrade/Downgrade in the Actions column.
  5. In the dialog box that appears, select Downgrade and Instance Type. Click Continue.
  6. Select an instance type, confirm the refund amount, and then select ECS Service Terms .
  7. Click Downgrade Now.
  8. Start the ECS instance.


The new instance type takes effect immediately.