ELB instances are billed monthly on a pay-as-you-go basis. Fees vary by instance type and usage duration within each billing cycle.
Instance types and pricing
ELB instance types differ in maximum connections, new connections per second (CPS), and queries per second (QPS). Compare specifications in Instance types and pricing.
Unit prices per instance type:
|
Specification |
Unit price (CNY/month) |
|
Small (elb.s1.small) |
50 |
|
Medium I (elb.s2.small) |
170 |
|
Medium II (elb.s2.medium) |
340 |
|
Large I (elb.s3.small) |
680 |
|
Large II (elb.s3.medium) |
1080 |
Billing rules
|
Item |
Description |
|
Billing method |
Pay-as-you-go |
|
Billing cycle |
Monthly |
Your monthly bill sums the fees for all ELB instances. Each instance fee is calculated as:
Fee = Unit price x Effective factor
Effective days
Effective days is the number of days from when an ELB instance is created until it is released, or until the end of the month if not released.
| Scenario | Created | Released | Effective days |
|---|---|---|---|
| Instance released within the month | June 5, 2024 | June 25, 2024 | 21 |
| Instance used till the end of the month | June 5, 2024 | Not released | 26 |
Effective factor
Effective factor = Effective days / Total days in the month.
Example: if June 2024 has 26 effective days, the effective factor is 26/30 = 0.86666667.
Billing example
Scenario: A Medium I (elb.s2.small) ELB instance is created on June 5, 2024 and remains active through June 30, giving 26 effective days.
Calculation:
-
Effective factor: 26/30 = 0.86666667.
-
Unit price: USD 26/month for Medium I (elb.s2.small) instances.
-
Fee for the instance in June: 26 x 0.86666667 = USD 22.53.
Additional fees
Associating an elastic IP address (EIP) with an ELB instance incurs separate Internet traffic charges. Billing for EIPs.