RDS supports two billing methods.
|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.|
View billing history
To check how much the billable items (such as instance specifications, monitoring, SQL audit) have costed you, see View purchase details.