Public NAT Gateway Billing Overview
Last updated: 2025-08-01 11:04:31
This document introduces in detail the fee description of the NAT Gateway.
Note:
Currently, Tencent Cloud accounts are divided into standard accounts (formerly "bill-by-IP accounts") and traditional accounts (formerly "bill-by-CVM accounts"). Accounts registered after 00:00 on June 17, 2020, are all standard accounts. Regarding accounts registered before 00:00, you can check your account type in the console. For specific operations, see Checking Account Type. For details on account type differences, see Account Type Differences.
For comparison between standard NAT Gateway and traditional NAT Gateway, see Instance Type Comparison.
Instance fees for one hour will be deducted in advance when a NAT Gateway is created. Ensure your account balance is sufficient.
Standard NAT Gateway
For the standard NAT Gateway, instance fees and capacity unit (CU) fees will be charged, which are postpaid and billed on an hourly basis.
Instance Fees
Instance fees of the standard NAT Gateway are settled hourly and billed by actual usage duration.
Instance fees = Instance unit price (USD/hour) x Usage duration (hours)
Billing Item | Region | Unit Price (USD/Instance/Hour) | Discount Price on the Official Website (USD/Instance/Hour) |
Instance fees | Guangzhou/Beijing/Shanghai/Nanjing/Chengdu/Chongqing/Hong Kong (China) | 0.034 | 0.0289 |
| Singapore/Bangkok/Jakarta/Virginia/Tokyo/Frankfurt/Silicon Valley/Seoul/São Paulo | 0.043 | 0.03655 |
| Beijing Finance | 0.0544 | 0.04624 |
Note:
Starting from 00:00:00 on June 1, 2023:
Newly purchased standard NAT Gateway: The discount price on the official website for the instance fees is 15% lower than the list price.
Existing standard NAT Gateway: The price remains unchanged.
The discount price on the official website is the transaction price after users enjoy the official website discount. It is not the adjusted list price. The official website discount adjustment is valid for a long time. An announcement will be issued in advance for any changes in the future. If other discounts are available, consult your business manager for the specific transaction price.
CU Fees
CU is a performance capacity unit used to measure the performance metrics involved when the standard NAT Gateway processes traffic.
CU Metrics
CU metrics include the number of active connections and concurrent connections and processed traffic. The number of CUs is calculated based on the performance metrics consumed by the gateway per hour. CU performance metrics are as follows:
Metric Name | Description | CU Coefficient | Calculation Formula for the Number of CUs per Hour |
Active connections (conns) | The number of active connections accommodated simultaneously. During a billing cycle, the system records 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 obtain the number of CUs for hourly active connections. | 10,000 | Number of CUs = Maximum active connections per minute within an hour / CU coefficient |
New connections (cps) | The number of new connections per second. During a billing cycle, the system records 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 obtain the number of CUs for hourly new connections. | 1,000 | Number of CUs = Maximum new connections per second within an hour / CU coefficient |
Traffic processed (bytes) | The quantity of the bytes processed by the NAT Gateway, including outbound and inbound traffic (measured in GB). During a billing cycle, the system records the total traffic (outbound and inbound) processed by the NAT Gateway, and then divides the total traffic by the CU coefficient to obtain the number of CUs for hourly processed traffic. | 1 GB | Number of CUs = Total processed traffic within an hour / CU coefficient |
Billing Price
CU fees of the standard NAT Gateway are settled hourly and billed by actual usage duration.
CU fees = CU unit price (USD/CU/hour) x Number of CUs x Usage duration (hours). The calculation logic for the number of CUs is based on the dimension with the highest CU consumption during that hour. Namely, Number of CUs = MAX[the number of CUs for active connections during that hour, the number of CUs for new connections during that hour, and the number of CUs for processed traffic during that hour].
Billing Item | Region | Unit Price (USD/CU/Hour) | Discount Price on the Official Website (USD/CU/Hour) |
CU fees | Guangzhou/Beijing/Shanghai/Nanjing/Chengdu/Chongqing/Hong Kong (China) | 0.034 | 0.0289 |
| Singapore/Bangkok/Jakarta/Virginia/Tokyo/Frankfurt/Silicon Valley/Seoul/São Paulo | 0.043 | 0.03655 |
| Beijing Finance | 0.0544 | 0.04624 |
Note:
Starting from 00:00:00 on June 1, 2023:
Newly purchased standard NAT Gateway: The discount price on the official website for the CU fees is 15% lower than the list price.
Existing standard NAT Gateway: The price remains unchanged.
The discount price on the official website is the transaction price after users enjoy the official website discount. It is not the adjusted list price. The official website discount adjustment is valid for a long time. An announcement will be issued in advance for any changes in the future. If other discounts are available, consult your business manager for the specific transaction price.
Billing Examples
Assuming that you purchased a standard NAT Gateway instance in Guangzhou at 09:00:00 on October 1, 2024, and deleted the instance at 09:59:59 on October 1, 2024. During this period, the number of active connections and new connections and processed traffic data for the instance are as follows:
Metric | Usage | CU Coefficient | Number of CUs for Calculation |
Active connections | 25,000 | 10,000 | 2.5 |
New connections | 3,000 | 1,000 | 3 |
Processed traffic | 10GB | 1GB | 10 |
In this example, the dimension with the highest CU consumption is processed traffic (10 CUs). As a result, CU fees are calculated based on the number of CUs corresponding to processed traffic.
Instance fees = 0.034 USD/instance/hour x 1 instance x 1 hour = 0.034 USD
CU fees = 0.034 USD/CU/hour x 10 CUs x 1 hour = 0.34 USD
Standard NAT Gateway fees = Instance fees + CU fees = 0.034 USD + 0.34 USD = 0.374 USD
Other Relevant Fees
The standard NAT Gateway supports public network access through EIPs. The billing for public NAT Gateway instances does not include EIP fees. For EIP billing rules, please see Related Documents.
Traditional NAT Gateway
Traditional NAT Gateway (formerly NAT Gateway) fees include instance fees and network fees.
Instance Fees
Instance fees of the traditional NAT Gateway are settled hourly and billed by actual usage duration. Different specifications are of different prices, and the details are as shown below:
Instance Fees | Region | Traditional NAT Gateway - Small (USD/Instance/Hour) | Traditional NAT Gateway - Medium (USD/Instance/Hour) | Traditional NAT Gateway - Large (USD/Instance/Hour) |
Instance fees | Chinese mainland, excluding Hong Kong (China), Macao (China), and Taiwan (China) | 0.089 | 0.28 | 0.89 |
| Singapore/Jakarta/Silicon Valley/Virginia/Frankfurt/Hong Kong (China)/Seoul/Tokyo/São Paulo | 0.13 | 0.39 | 1.3 |
| Bangkok | 0.14 | 0.42 | 1.4 |
Network Fee
The network fee is the traffic fee generated by the CVM accessing the public network through the EIP bound to the NAT Gateway. The private network communication between the CVM and the NAT Gateway does not incur a network fee. For different account types, the traditional NAT Gateway adopts different billing modes for the network fee.
Standard account type:
Supports binding common IPs billed by traffic, as well as regular IPs, accelerated IPs, and static single-line IPs billed by bandwidth package.
The EIP under this account type has bandwidth and traffic management capabilities. Therefore, the network fees are uniformly billed on the EIPs bound to the NAT Gateway, and no duplicate fees are billed on the NAT Gateway. For details, please refer to EIP Public Network Fees.
When the users of the standard account type enable the bandwidth package feature and add the EIPs bound to the NAT Gateway to the bandwidth package (IP resource package), the bandwidth fee for the NAT Gateway service will be settled according to the overall bandwidth package.
Traditional account type:
Only supports binding EIPs of common BGP IPs.
The EIP under this account does not have bandwidth and traffic management capabilities. Therefore, the network fee is billed by traffic on the NAT Gateway. It is postpaid and settled hourly. The billing prices are as follows:
Region | Price (Unit: USD/GB) |
The Chinese mainland (excluding Hong Kong, Macau and Taiwan), Hong Kong (China), Jakarta, Seoul | 0.12 |
Tokyo | 0.13 |
Singapore | 0.081 |
São Paulo | 0.15 |
Silicon Valley, Frankfurt | 0.077 |
Bangkok | 0.1 |
Virginia | 0.075 |
Billing Example:
For example, CVM1, CVM2, and CVM3 in a VPC of the Guangzhou region accessed the public network through a small NAT Gateway. During 07:00:00 - 07:59:59, a total of 10 GB traffic was used. The fees incurred at 08:00:00 are as follows:
Instance fees = 0.089 USD/hour x 1 instance x 1 hour = 0.089 USD
Network fees = 0.12 USD/GB x 10GB = 1.2 USD
Total fees = Instance fees + Network fees = 0.089 USD + 1.2 USD = 1.289 USD
Note:
NAT Gateway features dual-server hot backup. The system sends a 5 KB detection packet to the primary and secondary servers of the NAT Gateway every 3 seconds, thereby generating 0.2747 GB traffic each day. The fees incurred for the Chinese mainland (excluding Hong Kong, Macao, and Taiwan) and Hong Kong (China) are 0.033 USD and 0.033 USD respectively.
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