Billing Items

You are billed for DSC instances you select based on the billing mode you choose.

Description

Figure 1 DSC billing modes

**Table 1** Billing items
Billing Mode	Billing Item	Description
Yearly/Monthly	(Mandatory) Edition specifications	Billed based on the specifications of purchased DSC edition (standard or professional). For details about service specifications and functions supported by each service edition, see Specifications of Different DSC Editions.
	(Optional) Database expansion package	Billed based on the number of purchased packages.
	(Optional) OBS expansion package	Billed based on the number of purchased packages.
	Required duration	Billed on a yearly or monthly basis.
Pay-Per-Use	APIs (data masking and watermarking)	APIs are included only in the professional edition. By default, the professional edition offers one million API calls each month. Note that the unused API calls for the previous month will become invalid. For pricing about extra API calls, see Product Pricing Details.

Billing Examples

Take the yearly/monthly billing mode as an example. Assume that you purchased a DSC professional edition instance, along with a database expansion package and an OBS expansion package at 15:50:04 on July 8, 2023. The initial subscription duration was one month, and you manually renewed it for an additional month prior to its expiration. The billing details are as follows: