Alibaba Cloud only supports the Pay-As-You-Go billing method for ECS instance Internet bandwidth usage, known as PayByTraffic. Alibaba Cloud calculates the fees on an hourly basis according to actual traffic usage, regardless of ECS instance billing methods and network types. Network bandwidth pricing may vary according to the region. For more information about pricing, see pricing of ECS instances.
Note Alibaba Cloud does not charge any fee on intranet traffic.

Internet bandwidth types

The following table lists Internet bandwidth types and related information for ECS instances.

Internet bandwidth types Definition Bandwidth limit
Outbound bandwidth The bandwidth for outbound traffic from ECS instances, for example, when your ECS instances provide external access or you want to download internal resources from the ECS instances by using an FTP client.
  • Subscription instance: up to 200 Mbit/s
  • Pay-As-You-Go instance: up to 100 Mbit/s
Inbound bandwidth The bandwidth for inbound traffic to ECS instances, for example, when you want to download resources from the Internet to your ECS instances, or upload resources to the ECS instances by using an FTP client. Up to 200 Mbit/s

Alibaba Cloud only charges fees for outbound traffic usage. The fee is calculated on an hourly basis and the billing unit is USD/GiB. When creating an instance, you can set a peak value for the outbound bandwidth to avoid incurring excessive fees due to traffic bursts.

Note No fee is charged for the traffic between ECS instances in the same LAN.

Purchase Internet bandwidth

Different methods apply when you are purchasing Internet bandwidth for different Internet access modes:

  • If an ECS instance needs to access the Internet by using its own Internet address, you must purchase Internet bandwidth while creating the instance.

    How to purchase: When creating an ECS instance, in the Network Billing Method part, select Assign public IP and set a peak value.

  • If your ECS instance is in a VPC network and you want to use an Elastic IP address (EIP) to access the Internet, you only need to purchase the EIP service. For more information about the EIP service, see EIP address related documentation.

    Note If your ECS instances access the Internet by using an EIP address, you must not select Assign public IP when you create an instance.

Payment options

You can pay for Internet bandwidth by using any of the following payment options:

  • Credit card or a PayPal account attached to your account.
  • A data transfer plan. You can purchase a plan and deduct the traffic usage from it. For more information about data transfer plans, see ECS Starter Package Plan.

Bill calculation example

Assume that the average bandwidth of your ECS instance in an hour is 0.5 Mbit/s and the bandwidth price is USD 0.081 per GiB. You must pay the following amount for the hourly traffic:

[(0.5 × 60 × 60) /1024/8] GiB × 0.081 USD/GiB = 0.018 USD

Note In this example, it is assumed that the outbound traffic is 0.5 Mbit/s (the average bandwidth of the ECS instance). For actual calculations, you can go to Billing Management > Usage Records to download the usage history of ECS.