Billing Mode Overview

Registry/Configuration centers provide pay-per-use billing. Pay-per-use is postpaid. You use registry/configuration centers and then pay as billed for your usage duration. The fees are calculated in seconds and billed by the hour. Pay-per-use allows you to flexibly adjust resource usage. You do not need to provision resources in advance, or end up with excessive or insufficient resources. This mode is useful for traffic bursts.

**Table 1** Billing mode
Billing Mode	Pay-per-use
Payment Mode	Postpaid Billed by your usage duration
Billing Cycle	Calculated in seconds and billed by the hour
Billing Items	Registry/Configuration center Nacos instance Registry/Configuration center Nacos capacity unit
Billing for Frozen Engines	You will not be billed for frozen engines.
Billing Mode Change	Not allowed
Specification Change	Allowed
Application Scenario	Useful when you want more flexibility and control over resource usage