Overview

After purchasing a TaurusDB or HTAP instance, you can change the billing mode if it no longer meets your needs. Table 1 lists the changeable DB instance billing items.

**Table 1** Changeable DB instance billing items
Billing Item	Change Description	Reference
Instance specifications (vCPUs and memory)	Changing the billing mode of a DB instance includes the changes to compute resources (vCPUs and memory) and storage space. 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 is only applied after the yearly/monthly subscription expires.	Pay-per-Use to Yearly/Monthly Yearly/Monthly to Pay-per-Use
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