Pay-per-Use

Pay-per-use is postpaid and useful if you do not want to pay upfront or if you want to avoid a long-term commitment. You can use KooMessage as long as you have a valid payment method configured.

After you subscribe to KooMessage, pay-per-use billing is enabled by default. If you do not use KooMessage, no expenditures will be generated.

Scenarios

Pay-per-use billing is useful for short-term, bursty, or unpredictable workloads that cannot tolerate any interruptions, such as e-commerce flash sales or holiday blessings.

Billing Items

KooMessage email messages are billed on a pay-per-use basis. For details, see Table 1.

**Table 1** Billing items
Billing Item	Description
Email messages	Billed by the number of emails you sent.

Billing Cycle

Billing for email messages is updated hourly. For example, the fees generated when a user sends emails from 08:00:00 to 09:00:00 are usually calculated around 10:00:00.

Billing Formula

Fees = Usage x Unit price.

Arrears

When you use KooMessage, if you have a past due balance on your account, your account will fall into arrears. KooMessage may not be able to run, so bring your account current in a timely manner.

For more information, see Arrears and Avoiding and Handling Arrears.