Billing methods

RDS supports two billing methods.

Billing method Description
  • Indicates prepayment. You need to pay when creating an instance.
  • For long-term requirements, Subscription is more cost-effective than Pay-As-You-Go. Moreover, the longer the subscription, the higher the discount.
  • Subscription instances cannot be released manually.
  • Subscription instances cannot be converted to Pay-As-You-Go instances.
  • Indicates post payment. You are billed by hour. The system generates a billing order every hour and deducts the corresponding amount from your account balance. The amount depends on the instance configuration at the time when the order is generated.
  • Pay-As-You-Go is cost-effective for short-term requirements because the instance can be released at any time.
  • Pay-As-You-Go instances can be converted to Subscription instances.

Billable items

Item Billing standard
Master instance The price depends on the RDS instance specifications. The billing method is Subscription or Pay-As-You-Go.
Storage The billing method is Subscription or Pay-As-You-Go, depending on the billing method of the master instance.
Read-only instance The billing method is Pay-As-You-Go. The costs depend on the read-only instance specifications.
Clone instance A clone instance is the instance created when you restore data to a new instance. The costs are the same as those of a master instance.
Backup space No charge is incurred if the size of the backups (data and log backups) of an instance do not exeed the free quota. If they exceed the free quota, the excess space used is billed by hour.
  • Free: monitoring frequency of once every 60 or 300 seconds
  • BIlled by hour: monitoring frequency of once every 5 seconds
SQL audit
  • This function is disabled by default. If it is enabled, you are billed by hour.
  • Hourly fee = price x total SQL log size at the time when the hourly billing order is generated


For detailed pricing of the preceding billable items, see the following:

View billing history

To check how much the billable items (such as instance specifications, monitoring, SQL audit) have costed you, see View purchase details.