About Billing

WAF instances can be billed monthly or on a pay-per-use basis, which is postpaid.

Figure 1 WAF billing modes

**Table 1** Billing items
Mode	Billing Mode	Billing Item	Billing Description
Cloud mode	Pay-per-use	Number of domains Number of requests	Number of domain names: Billed on an hourly basis. Once a domain name is added during the billing period, it will be billed no matter when it is deleted. Number of requests: Billed on a monthly basis.
Dedicated mode	Pay-per-use	Number of instances	Billed for what you use
Dedicated mode	Monthly	Number of instances	You will be billed based on how many instances you apply for and what instance specifications you select.

Monthly billing: The longer you use the service, the more money you save. You will be billed based on how many instances you apply for and what instance specifications you select.
Pay-per-use billing: you can enable or disable an instance anytime you want.
- For a pay-per-use cloud WAF instance, you are billed for the number of added domain names and number of handled requests.
- For a pay-per-use dedicated WAF instance, you are billed for the required duration (accurate to second), which starts when the instance is created and ends when the instance is deleted.