This topic describes the billable items and pricing of Application Load Balancer (ALB).

Billable items of ALB

Total fees of ALB include instance fees, capacity unit (CU) fees, and Internet bandwidth fees.

Network type Instance fee CU fee Internet bandwidth fee
Internet Charged Charged Charged
Private network Charged Charged N/A
Note Before June 30, 2021, Alibaba Cloud offers a free trial of ALB . You are charged for only Internet bandwidth resources. You are not charged for ALB instances and CUs.

Instance fees

ALB supports the pay-as-you-go billing method. You are charged for each hour that an ALB instance runs. If an ALB instance runs for less than one hour, the usage duration is rounded up to one hour.

Instance fee = Instance unit price × Amount of time that the ALB instance runs (hours)
Note In the table below the price is for reference only, the specific price take the price on the purchase page as the standard.
Edition Instance fee (USD/hour) Instance fee (USD/day)
Basic Edition 0.007 0.168
Standard Edition 0.021 0.504

CU fees

A CU measures the dimensions on which ALB processes traffic. The four dimensions measured are:
  • Number of new connections: The number of newly established connections per second.
  • Number of concurrent connections: The number of concurrent connections.
  • Processed traffic: The amount of traffic that ALB processes for HTTP or HTTPS requests and responses. Unit: GB.
  • Evaluated rules: The number of forwarding rules that you configured for the ALB × QPS. The first 10 rules are free of charge.
    • If the number of forwarding rules that you configured for an ALB instance is greater than 10, the following formula is applied: Rule evaluations = QPS × (Number of forwarding rules that you configured for the ALB instance - 10).
    • If the number of forwarding rules that you configured for an ALB instance is less than or equal to 10, the following formula is applied: Rule evaluations = QPS.
A CU of ALB contains the following items:
  • 25 new connections per second
  • 3,000 concurrent connections per minute
  • 1 GB data transfer per hour
  • 1,000 evaluated rules per second

The number of CUs that are consumed by an ALB instance within an hour is calculated on the preceding dimensions. The CU fee of an ALB instance is calculated based on the highest number of CUs consumed on the four dimensions.

Note In the table below the price is for reference only, the specific price take the price on the purchase page as the standard.
CU CU fees (USD/CU)
LCU 0.007

Internet bandwidth fees

Internal-facing ALB instances do not charge Internet bandwidth fees. Internet-facing ALB charge Internet bandwidth fees. Internet-facing ALB instances use elastic IP addresses (EIPs) to provide services over the Internet. When an Internet-facing ALB instance uses an EIP to provide Internet-facing services, you are charged for instances, Internet bandwidth resources, and data transfer. For more information, see Pay-as-you-go.