Private NAT Gateway Operation Guide
Last updated:2026-03-09 18:30:44
This document introduces the billing information of Private NAT Gateway.
Note:
Private NAT Gateway is currently in grayscale testing and supports Beijing, Shanghai, Guangzhou, Chengdu, Chongqing, Hong Kong (China), Singapore, Tokyo, and Virginia. To use it, please submit a ticket to apply.
Instance Type | Billing Item | Description |
Private NAT Gateway | Instance fee | Billed based on the actual usage duration. |
| CU fee | Billed based on the actual usage amount. |
Private NAT Gateway charges gateway fees. Gateway fees = Instance fee + CU fee.
Billing Mode
The billing mode for the instance fee and CU fee is pay-as-you-go (postpaid) on an hourly basis.
Instance fee = Instance unit price (USD/hour) x Usage duration (hours)
CU fee = CU unit price (USD/CU/hour) x Number of CUs x Usage duration (hours). The number of CUs is calculated based on the dimension with the highest CU consumption during the hour:
Number of CUs = MAX [number of CUs from active connections during the hour, number of CUs from new connections during the hour, number of CUs from processed traffic during the hour]
Note:
CU metrics include active connections, new connections, and processed traffic. The number of CUs is calculated based on the actual performance metrics consumed by the gateway during the hour. The CU performance metrics are as follows:
Metric Name | Description | CU Coefficient | Calculation Formula for the Number of CUs per Hour |
Active connections | The number of concurrent active connections supported. During a billing cycle, the system collects the number of active connections per minute for the NAT Gateway, and then divides the maximum number of active connections per minute by the CU coefficient to calculate the number of CUs for active connections per hour. | 10,000 | Number of CUs = Maximum active connections per minute per hour/CU coefficient |
New connections | The number of new connections per second. During a billing cycle, the system collects the number of new connections per second for the NAT Gateway, and then divides the maximum number of new connections per second by the CU coefficient to calculate the number of CUs for new connections per hour. | 1,000 | Number of CUs = Maximum new connections per second per hour/CU coefficient |
Processed traffic | The amount of data processed by the NAT Gateway, including inbound and outbound traffic (measured in GB). During a billing cycle, the system collects the total inbound and outbound traffic processed by the NAT Gateway, and then divides the total traffic by the CU coefficient to calculate the number of CUs for processed traffic per hour. | 1GB | Number of CUs = Total processed traffic per hour/CU coefficient |
Billing Price
Billing Item | Region | Unit Price (USD/Instance/Hour) | Discount Price on the Official Website (USD/Instance/Hour) |
Instance fee | Guangzhou/Beijing/Shanghai/Chengdu/Chongqing/Hong Kong (China) | 0.034 | 0.0289 |
| Tokyo/Singapore/Virginia | 0.043 | 0.03655 |
CU fee | Guangzhou/Beijing/Shanghai/Chengdu/Chongqing/Hong Kong (China) | 0.034 | 0.0289 |
| Tokyo/Singapore/Virginia | 0.043 | 0.03655 |
Note:
Starting from 00:00:00 on June 1, 2023:
New Private NAT Gateway: The discount price on the official website for the instance fee is 15% lower than the list price.
Existing Private NAT Gateway: The price remains unchanged.
The discount price on the official website refers to the transaction price after users apply the official website discount, and is not an adjustment to the list price. This discount adjustment is valid for a long term, and any subsequent changes will be announced in advance. If other discounts are available, consult your business manager for the specific transaction price.
Billing Example
For example, if you purchase a Private NAT Gateway instance in the Guangzhou region at 07:00:00 on January 1, 2024, and delete the instance at 07:59:59 on the same day. During the 07:00:00–07:59:59 period, the instance had an average of 15,000 active connections per minute and 3,000 new connections per second, and processed a total of 10 GB of data for both requests and responses. The fees incurred at 08:00:00 are as follows:
Instance fee = 0.034 USD/instance/hour x 1 hour x 1 instance = 0.034 USD
CU fee = 0.034 USD/CU/hour x 1 hour x 10 CUs= 0.34 USD
Metric Name | Calculation Formula for the Number of CUs per Hour |
Active connections | 15,000 ÷ 10,000 = 1.5 |
New connections | 3,000 ÷ 1,000 = 3 |
Processed traffic | 10 ÷ 1 = 10 |
MAX [number of CUs from active connections during the hour, number of CUs from new connections during the hour, number of CUs from processed traffic during the hour] | 10 |
Total fees = Instance fee + CU fee = 0.034 USD + 0.34 USD = 0.374 USD
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