Overview

You can change the billing mode if it no longer meets your needs. Table 1 lists the changeable DB instance billed items.

**Table 1** Changeable DB instance billed items
Billed Item	Change Description	Reference
Instance class	Changing the billing mode of a DB instance includes the changes to the instance class (vCPUs and memory), storage space, image (for RDS for SQL Server only), and dedicated resources (optional). Change from pay-per-use to yearly/monthly to enjoy lower prices. Change from yearly/monthly to pay-per-use to use the DB instance more flexibly. NOTE: Such a change takes effect only after the yearly/monthly subscription ends.	-
Storage space
Image (for RDS for SQL Server only)
(Optional) Deployment in DCC
EIP	A yearly/monthly EIP can be changed to a pay-per-use EIP billed by bandwidth after the yearly/monthly subscription ends. A pay-per-use EIP billed by bandwidth can be changed to a yearly/monthly EIP. Pay-per-use EIPs billed by bandwidth can be changed to pay-per-use EIPs billed by traffic, and pay-per-use EIPs billed by traffic can be changed to pay-per-use EIPs billed by bandwidth. For details, see Figure 1.	Pay-per-Use to Yearly/Monthly Yearly/Monthly to Pay-per-Use
Database proxy (for RDS for MySQL only)	Only pay-per-use proxies can be selected for pay-per-use DB instances. Either pay-per-use proxies or yearly/monthly proxies can be selected for yearly/monthly DB instances. If you select a pay-per-use proxy, it can be changed to yearly/monthly after creation. If you want to select a yearly/monthly proxy, contact customer service.	Changing a Proxy from Pay-per-Use to Yearly/Monthly