Public NAT Gateway Billing Overview
Last updated:2026-03-09 18:29:56
This article provides details on the billing items, billing modes, and pricing information of the public network NAT Gateway, helping you quickly understand the associated costs.
Note:
Currently, Tencent cloud accounts are divided into Standard Account Type (bill-by-IP accounts) and Traditional Account Type (bill-by-CVM accounts). Accounts registered after 00:00:00 on June 17, 2020, are all standard accounts. For accounts registered before this point in time, please 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 a comparison between Standard NAT Gateway and Classic NAT Gateway, see Instance Type Comparison.
The instance fee for one hour will be pre-deducted when you create a NAT Gateway instance. Ensure your account balance is sufficient.
Account Type | Instance type | Billing Item | Description |
Standard account | Standard NAT Gateway (recommended type) | Instance fee | Billed based on the actual usage duration. |
| | CU fee | Billed based on the actual usage amount. |
| | Network fee | The network fee is uniformly billed to the EIP associated with the NAT Gateway. For details, see Public Network Fees. |
| Classic NAT Gateway | Instance fee | Billed based on the actual usage duration. |
| | Network fee | The network fee is uniformly billed to the EIP associated with the NAT Gateway. For details, see Public Network Fees. |
Traditional account | Classic NAT Gateway | Instance fee | Billed based on the actual usage duration. |
| | Network fee | The network fee is billed to the NAT Gateway on a pay-as-you-go basis. |
Standard NAT Gateway
Standard NAT Gateway charges the instance fee and CU fee. Both instance fee and CU fee are postpaid and billed hourly.
Instance Fee
Billing Mode
The billing mode for the standard NAT Gateway instance fee is pay-as-you-go (postpaid), with hourly settlement based on actual usage duration. Instance fee = Unit price (USD/hour) x Usage duration (hours)
Billing Price
Billable Item | Region | Unit Price (USD/Instance/Hour) | Discount Price on the Official Website (USD/Instance/Hour) |
Instance fee | Guangzhou/Beijing/Shanghai/Nanjing/Chengdu/Chongqing/Hong Kong (China) | 0.034 | 0.0289 |
| Singapore/Bangkok/Jakarta/Virginia/Seoul/Tokyo/Frankfurt/Silicon Valley/São Paulo | 0.043 | 0.03655 |
| Beijing Finance | 0.0544 | 0.04624 |
Note:
Starting from 00:00:00 on June 1, 2023:
New standard NAT Gateway: The discount price on the official website for the instance fee is 15% lower than the list price.
Existing standard 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.
CU Fee
CU is a performance capacity unit used to measure the performance metrics consumed by the standard NAT Gateway during traffic processing.
Billing Mode
The billing mode for the standard NAT Gateway CU fee is pay-as-you-go (postpaid), with hourly settlement based on actual usage duration.
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. The calculation is as follows: 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 concurrent 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
Billable Item | Region | Unit Price (USD/CU/Hour) | Discount Price on the Official Website (USD/CU/Hour) |
CU fee | Guangzhou/Beijing/Shanghai/Nanjing/Chengdu/Chongqing/Hong Kong (China) | 0.034 | 0.0289 |
| Singapore/Bangkok/Jakarta/Virginia/Seoul/Tokyo/Frankfurt/Silicon Valley/São Paulo | 0.043 | 0.03655 |
| Beijing Finance | 0.0544 | 0.04624 |
Note:
Starting from 00:00:00 on June 1, 2023:
New standard NAT Gateway: The discount price on the official website for the CU fee is 15% lower than the list price.
Existing standard 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 standard NAT Gateway instance in the Guangzhou region at 09:00:00 on October 1, 2024, and delete the instance at 09:59:59 on the same day. During this period, the number of active connections, the number of new connections, and processed traffic 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, the CU fee is calculated based on the number of CUs corresponding to processed traffic.
Instance fee = 0.034 USD/instance/hour x 1 instance x 1 hour = 0.034 USD
CU fee = 0.034 USD/CU/hour x 10 CUs x 1 hour = 0.34 USD
Standard NAT Gateway fees = Instance fee + CU fee = 0.034 USD + 0.34 USD = 0.374 USD
Other Relevant Fees
The standard NAT Gateway provides public network access through EIPs. The billing for public network NAT Gateway instances does not include EIP fees. For EIP billing rules, see Public Network Fees.
Classic NAT Gateway
Classic NAT Gateway (formerly NAT Gateway) fees include the instance fee and network fee.
Instance Fee
Billing Mode
The billing mode for the Classic NAT Gateway instance fee is pay-as-you-go (postpaid), with hourly settlement based on actual usage duration.
Billing Price
Instance Fee | Region | Classic NAT Gateway - Small (USD/Instance/Hour) | Traditional NAT Gateway - Medium (USD/Instance/Hour) | Traditional NAT Gateway - Large (USD/Instance/Hour) |
Instance fee | 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 costs incurred when CVMs access the public network via EIPs bound with the NAT Gateway. Communication between CVMs and the NAT Gateway is via the internal network and is not subject to billing. For different account types, the network fee for Classic NAT Gateway uses different billing methods.
Standard Account Type (bill-by-IP accounts):
Supports binding General BGP IP addresses billed by traffic, as well as General BGP IP addresses, accelerated IP addresses, and static single-line IP addresses billed by shared bandwidth package.
This type is billed based on actual usage duration. Since EIPs under this type has bandwidth and traffic management capabilities, the network fee is uniformly billed to the EIPs bound to the NAT Gateway, and no duplicate charges will be incurred on the NAT Gateway. For details, see EIP Public Network Fees.
When a user with a standard account enables the Shared Bandwidth Package feature and adds the EIPs bound with the NAT Gateway to the Shared Bandwidth Package (IP resource package), the bandwidth fee for the NAT Gateway service will be settled as part of the overall bandwidth package.
Traditional Account Type (bill-by-CVM accounts):
Only supports binding EIPs with General BGP IP addresses.
EIPs under this account type do not have bandwidth or traffic management capabilities. Therefore, the network fee is billed to the NAT Gateway based on traffic usage. The fee is postpaid and settled hourly. The pricing is as follows:
Region | Price (Unit: USD/GB) |
Chinese mainland (excluding Hong Kong/Macao/Taiwan (China)), Hong Kong (China), Jakarta, Seoul | 0.12 |
São Paulo | 0.15 |
Bangkok | 0.1 |
Singapore | 0.081 |
Tokyo | 0.13 |
Frankfurt, Silicon Valley | 0.077 |
Virginia | 0.075 |
Billing Example
For example, if CVM1, CVM2, and CVM3 in a VPC in the Guangzhou region access the public network through a small NAT Gateway instance, consuming a total of 10 GB of traffic between 07:00:00 and 07:59:59, the fees incurred at 08:00:00 are as follows:
Instance fee = 0.089 USD/instance/hour x 1 instance x 1 hour = 0.089 USD
Network fee = 0.12 USD/GB x 10 GB = 1.2 USD
Total fees = Instance fee + Network fee = 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 NAT Gateway every three seconds, generating 0.2747 GB of traffic each day.This results in a daily fee of 0.033 USD for the Chinese mainland (excluding Hong Kong (China), Macao (China), and Taiwan (China)) and 0.033 USD for Hong Kong (China), respectively.
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