Overview

Pay-per-use and yearly/monthly billing modes are supported.

Yearly/Monthly is a prepaid mode. You need to pay first, and will be billed for your subscription period. The longer the period, the larger the discount. This mode is suitable for long-term, stable services.
Pay-per-use is a postpaid mode. You use the service first, and will be billed afterwards for the instance usage and duration. This allows you to adjust resource usage easily. You neither need to prepare for resources in advance, nor end up with excessive or insufficient preset resources. This mode is suitable for scenarios with traffic bursts, such as e-commerce.

Table 1 compares the two billing modes.

**Table 1** Billing modes
Billing Mode	Yearly/Monthly	Pay-per-use
Payment	Prepaid Billed by the required duration specified in your order	Postpaid Billed by the multi-active instances, function modules, nodes, and usage duration
Billing Cycle	Billed by the required duration specified in your order	Multi-active instances are billed by hour, and function modules and nodes are billed by day.
Billing Mode Change	Not supported	Not supported
Specifications Change	Not supported	Not supported
Billed Item	Multi-active instance	Multi-active instance, function module, and node
Application Scenario	Recommended for long-term use. Suitable and price-friendly for scenarios where the resource usage duration can be estimated.	Recommended if you want more flexibility. Suitable for scenarios where resource demands fluctuate.