Billing items

When you use an RDS instance, in addition to the RDS instance fees, you must pay extra for certain functions. The following table lists the billing items and standards.

Item name Billing standard
Master instance
  • After an instance is created, it may have the following additional billing items:
    • Backup space: You are charged for the backup space you use in excess of the free space.

      Billing amount = Data backup space used (OSS + OAS) + Log backup space used (OSS) - 50% x Instance storage space (in GBs, rounded up only)

      You are changed for the backup space only when the total backup space used exceeds half of the instance storage space.
    • SQL audit: This function is disabled by default and not billed. If enabled, it is billed by hour. Hourly SQL audit fee = Current SQL audit log size * Unit price
    • Performance monitoring: If you enable high-frequency monitoring at a 60 second interval, it is billed separately.
    • Public network (Internet) traffic fees
  • For more information about the billing standard, see Pricing.
Read-only instance
SQL audit
Public network traffic

Billing methods

RDS supports the following two billing methods.

Billing method Description Considerations
  • You can select the yearly or monthly subscription billing method.

  • If you select prepayment, you need to pay for the instance when creating it.
  • During the contract period, Subscription instances can only be upgraded, but cannot be downgraded or released.

  • If you cancel your Subscription instance during the contract period, you must pay the appropriate processing fees.

  • Subscription instances cannot be converted to Pay-As-You-Go instances.
  • You are billed by hour.

  • Billing is based on the instance configuration when a billing order is generated.

  • In post-payment mode, the system generates a billing order every hour and deducts the corresponding amount from your account balance.
  • You must perform real-name verification for your account before purchasing a Pay-As-You-Go instance.

  • A Pay-As-You-Go instance can be released at any time.

  • A Pay-As-You-Go instance can be converted into a Subscription instance. After the billing method is successfully changed, the instance is billed in Subscription mode. For more information about how to change the billing method, see Change billing method.