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.
Billing overview
Billing of NAT gateways
Item | Rule |
Billing method | 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). |
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.
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), 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 |
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: |
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: |
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: |
The following table lists the unit prices of CUs for Internet NAT gateways.
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).
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.
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.