This topic provides answers to some frequently asked questions about the billing of Key Management Service (KMS).
Questions
Does KMS support free trials?
No, KMS does not support free trials. If you want to perform server-side encryption in Alibaba Cloud services, KMS provides a free default key of the customer master key (CMK) type in each region. You do not need to purchase a KMS instance.
Does the billing for a KMS instance stop after the KMS instance is expired?
Yes, the billing for a KMS instance stops after the KMS instance is expired.
Can I unsubscribe from a KMS instance?
Yes, you can request a partial refund for KMS instances that are in the Disabled and Enabled states. You can also cancel pending renewal orders. For more information, see Billing.