All Products
Search
Document Center

NAT Gateway:Billing of Internet NAT gateways

Last Updated:Dec 08, 2023

You are charged for using Internet NAT gateways. This topic describes the billing methods and billable items of Internet NAT gateways.

Billing rules

The following figure shows the billable items of Internet NAT gateways.计费组成

Billing overview

Billing of NAT gateways

Item

Description

Billing methods

Internet NAT gateways support the pay-as-you-go billing method. The pay-as-you-go billing method allows you to use resources before you pay for them. Bills are generated and fees are deducted after each billing cycle.

Billing cycles and bill generation time

Internet NAT gateways are billed based on resource usage on an hourly basis. In most cases, bills are generated within 1 hour after a billing cycle ends. The time when bills are generated is determined by the system.

Billable items and billing formula

The billable items of Internet NAT gateways consist of instances and Capacity Units (CUs).

Total fee = Instance fee + CU fee
Note

After you delete an Internet NAT gateway, the billing immediately stops. For more information about how to delete an Internet NAT gateway, see Delete an Internet NAT gateway.

Instance fees

You are charged instance fees for Internet NAT gateways on an hourly basis. Fees are calculated and bills are generated on an hourly basis. If you use an Internet NAT gateway for less than 1 hour, the usage duration is rounded up to 1 hour. The usage duration refers to the period of time from when an Internet NAT gateway is created to when the Internet NAT gateway is released.

Instance fee = Instance unit price (USD/hour) × Usage duration (hours)

The following table lists the unit prices of Internet NAT gateways.

Note

The prices listed in the following table are for reference only. The actual prices on the buy page shall prevail.

Region

Instance unit price (USD/hour)

China (Hangzhou), China (Shanghai), China (Qingdao), China (Beijing), China (Zhangjiakou), China (Hohhot), China (Ulanqab), China (Shenzhen), China (Heyuan), China (Guangzhou), China (Chengdu), and China (Wuhan - Local Region)

0.034

China (Hong Kong), Japan (Tokyo), South Korea (Seoul), Singapore, Australia (Sydney), Malaysia (Kuala Lumpur), Indonesia (Jakarta), Philippines (Manila), Thailand (Bangkok), India (Mumbai), Germany (Frankfurt), UK (London), US (Silicon Valley), US (Virginia), and UAE (Dubai)

0.043

CU fees

You are charged CU fees for Internet NAT gateways on an hourly basis. Fees are calculated and bills are generated on an hourly basis. If you use an Internet NAT gateway for less than 1 hour, the usage duration is rounded up to 1 hour.

CU fee per hour = CU unit price (USD per CU) × Number of CUs
Number of CUs consumed per hour = Max {Number of CUs based on new connections per hour, Number of CUs based on concurrent connections per hour, Number of CUs based on data transfer per hour}

CUs measure the dimensions on which an Internet NAT gateway processes traffic. The following table describes the dimensions.

Metric

Unit

Default specification

CU coefficient

How the number of CUs per hour is calculated

Connections per second (CPS)

Seconds

100,000

1,000

The system collects all CPS values within a billing cycle and then divides the highest CPS value by the CU coefficient to calculate the number of CUs. The number of CUs based on CPS is calculated by using the following formula:

Number of CUs based on CPS = Highest CPS value/CU coefficient

Concurrent connections (CONNS)

Minutes

2,000,000

10,000

The system collects all CONNS values within a billing cycle and then divides the highest CONNS value by the CU coefficient to calculate the number of CUs. The number of CUs based on CONNS is calculated by using the following formula:

Number of CUs based on CONNS = Highest CONNS value/CU coefficient

Data transfer (bytes)

Hours

5 Gbit/s to 15 Gbit/s (automatic scaling)

1 GB

The system collects the total amount of data transfer including the inbound and outbound traffic within a billing cycle. Then, the system divides the total amount by the CU coefficient to calculate the number of CUs.

Note

The amount of outbound and inbound network traffic collected by the system is equal to the amount of network traffic to be processed by a NAT gateway.

The number of CUs based on data transfer is calculated by using the following formula:

Number of CUs based on data transfer = Total amount of data transfer/CU coefficient

The following table lists the unit prices of CUs for Internet NAT gateways.

Note

The prices listed in the following table are for reference only. The actual prices on the buy page shall prevail.

Region

CU unit price (USD/hour)

China (Hangzhou), China (Shanghai), China (Qingdao), China (Beijing), China (Zhangjiakou), China (Hohhot), China (Ulanqab), China (Shenzhen), China (Heyuan), China (Guangzhou), and China (Chengdu)

0.034

China (Hong Kong), Japan (Tokyo), South Korea (Seoul), Singapore, Australia (Sydney), Malaysia (Kuala Lumpur), Indonesia (Jakarta), Philippines (Manila), Thailand (Bangkok), India (Mumbai), Germany (Frankfurt), UK (London), US (Silicon Valley), US (Virginia), and UAE (Dubai)

0.043

Billing example for CU fees

You created three VPC NAT gateways in the Germany (Frankfurt) region at 08:10:00 (UTC+8) on November 8, 2021. Then, you released them at 08:50:00 (UTC+8) on November 8, 2021. The following table describes the highest CPS value, the highest CONNS value, and the total amount of data transfer of the three VPC NAT gateways from 08:10:00 (UTC+8) to 08:50:00 (UTC+8).

Table 1. Highest metric values

Metrics

NAT Gateway 1

NAT Gateway 2

NAT Gateway 3

Highest CPS value (connections/second)

1100

32

0

Highest CONNS value (connections/minute)

20000

8

0

Total amount of data transfer (GB/hour)

3.5

0.0056

0

The following table describes the numbers of CUs based on new connections, concurrent connections, and data transfer, and the CU fees of the NAT gateways.

Table 2. Number of CUs and CU fees

Number of CUs

NAT Gateway 1

NAT Gateway 2

NAT Gateway 3

Number of CUs based on CPS

1100÷1000=1.1

32÷1000=0.032

0

Number of CUs based on CONNS

20000÷10000=2

8÷10000=0.0008

0

Number of CUs based on data transfer

3.5÷1=3.5

0.0056÷1=0.0056

0

CU fee (USD)

3.5×0.043=0.1505

0.032×0.043=0.001376

0

Billing of related services

NAT gateways provide Internet-facing services by using elastic IP addresses (EIPs). You are charged for the EIPs that are associated with Internet NAT gateways. For more information, see Subscription and Pay-as-you-go.