Reserved instances have their separate billing methods. This topic describes the billing methods and billing rules of reserved instances.

Billing methods

The following table lists the billing methods supported by reserved instances.
Item All upfront Partial upfront Zero upfront
Qualification No qualification limits. You can purchase reserved instances if you have an Alibaba Cloud account. No qualification limits. You can purchase reserved instances if you have an Alibaba Cloud account. The availability of the zero upfront method depends on your ECS usage.
Billing method Full payment is required upfront. No other fees are charged within the validity period. Partial payment is required upfront. An hourly fee is charged within the validity period. No upfront payment is required. An hourly fee is charged within the validity period.
Upfront payment The upfront payment is deducted in a single transaction. The specific amount is subject to the specifications you selected on the purchase page. The upfront payment is deducted in a single transaction. The specific amount is subject to the specifications you selected on the purchase page. No upfront payment.
Hourly fee No hourly fee is charged.

Reserved instances are charged for each second, billed every hour, and paid for every month. The specific hourly rate is subject to the specifications you selected on the purchase page.

If the payable amount has reached USD 1,000, the amount will be automatically deducted from your account. Any amount less than USD 1,000 is deferred to the monthly bill.

Reserved instances are charged for each second, billed every hour, and paid for every month. The specific hourly rate is subject to the specifications you selected on the purchase page.

If the payable amount has reached USD 1,000, the amount will be automatically deducted from your account. Any amount less than USD 1,000 is deferred to the monthly bill.

Currency

USD

USD

USD

Billing rules

The validity period of the reserved instance starts immediately after your purchase. You are charged based on the payment method that you selected regardless of whether pay-as-you-go instances are matched. Selecting the all upfront method can save you the most money.

The reserved instance takes effect and is billed from the top of the hour during which it is purchased. It expires at 00:00:00 on the day after the expiration date. For example, if you purchase a one-year reserved instance at 2019-02-26 13:45:00, the reserved instance takes effect and is billed starting at 2019-02-26 13:00:00 and is set to expire at 2020-02-27 00:00:00. If you purchase a reserved instance that matches your existing pay-as-you-go instances, the discount is applied to the bills generated for the pay-as-you-go instances starting from 13:00 to 14:00 on February 26, 2019 until the reserved instance expires.