The content of this page has been automatically translated by AI. If you encounter any problems while reading, you can view the corresponding content in Chinese.
Traffic refers to the cumulative value of data flow generated when users use and access COS. It is categorized into public network upstream traffic, public network downstream traffic, private network upstream traffic, private network downstream traffic, and CDN/EdgeOne origin traffic, among others. COS charges based on the cumulative value of traffic actually consumed by users.
The billing unit for traffic billing items and traffic packages is GB, and the unit conversion for traffic follows a base-1024 system. For example: 1 TB of public network downstream traffic = 1024 GB. A 1 TB public network downstream traffic package, after conversion, is equivalent to 1024 GB of public network downstream traffic (this base conversion rule takes effect from April, 1 2025).
Traffic Fee Billing Items
Billable Item
Applicable storage types
Description
Applicable Billing Method
Public network downstream traffic
All storage types
Traffic generated from downloading data from COS to user's local environment or client over the public internet
Pay-as-you-go
Public network downstream traffic package
Public network upstream traffic
Traffic generated from uploading data from user's local environment or client to COS over the public internet.
Free
Private network upstream traffic
Traffic generated from transmitting data from client to COS over the Tencent Cloud private network.
Note: Tencent Cloud products within the same region access each other over the private network by default, with no traffic fees incurred. For how to determine whether it is a Tencent Cloud private network access, see Private Network Access
Free
Private network downstream traffic
Traffic generated from transmitting data from COS to client over the Tencent Cloud private network.
Note: Tencent Cloud products within the same region access each other over the private network by default, with no traffic fees incurred. For how to determine whether it is a Tencent Cloud private network access, see Private Network Access
Free
CDN origin-pull traffic
Back-to-origin traffic generated when data is transmitted from COS to Tencent Cloud CDN/EdgeOne edge nodes while users use COS as the origin site for CDN/EdgeOne.
Pay-as-you-go
CDN origin-pull traffic package
Cross-region replication traffic
Traffic generated from transmitting data from a bucket in one region to a bucket in another region.
Note:
Traffic generated by replication between buckets in the same region is free of charge.
Cross-region buckets: Cross-region replication traffic fees are incurred by replication and are billed according to the unit price of the source bucket's region.
Pay-as-you-go
Cross-region replication traffic package
Global acceleration traffic
Traffic generated from data transmission using the global acceleration domain name after the user enables the global acceleration feature, including public network global acceleration traffic and private network global acceleration traffic.
Acceleration traffic is categorized into upstream acceleration traffic and downstream acceleration traffic:
Upstream acceleration traffic is defined as the traffic generated when users upload local data to COS via a global acceleration domain name. If a user uploads files using a global acceleration domain name and the data travels over the private network acceleration link, upstream acceleration traffic fees will be charged.
Downstream acceleration traffic is defined as the traffic generated when users view or download data to their local devices via a global acceleration domain name. If a user downloads files using a global acceleration domain name and the data travels over the private network acceleration link, downstream acceleration traffic fees will be charged.
Pay-as-you-go
Global acceleration traffic package
Note:
If you download data using a global acceleration domain name, both global acceleration downstream traffic fees and public network downstream traffic fees will be incurred. If you use a global acceleration domain name as the origin domain for CDN/EdgeOne origin pull, both global acceleration downstream traffic fees and CDN origin traffic fees will be incurred.
Billing Limitations
Data in the ARCHIVE storage class cannot be read or downloaded. To read or download such data, you must first restore (or unfreeze) the data to the STANDARD storage class before reading it. Consequently, the traffic is counted towards STANDARD storage.
If you use a third-party CDN to pull content from Tencent Cloud COS, public network downstream traffic will be generated.
Traffic generated when users directly download objects via object links or browse objects via static website origins is classified as public network downstream traffic.
Traffic generated by transferring data from a bucket in one region to a bucket in a different region via the API copy or cross-region replication feature is defined as cross-region replication traffic. Cross-region replication traffic fees are calculated based on the unit price of the source bucket's region.
The traffic fee generated by data in the INTELLIGENT_TIERING storage class is consistent with the storage class after conversion.
Billing Methods and Calculation for Traffic Fees
Billing Mode
Applicable Billing Item
Calculation Method
Pay-as-you-go
public network downstream traffic fee
CDN origin traffic fee
cross-region replication traffic fee
global acceleration traffic fee
Daily settlement
Traffic fee = Unit price per GB × Daily cumulative traffic
Traffic resource package (prepaid)
public network downstream traffic fee
CDN origin traffic fee
cross-region replication traffic fee
global acceleration traffic fee
Traffic packages are categorized into several types based on traffic type.
Public network downstream traffic package: Used to offset public network downstream traffic.
CDN origin traffic package: Used to offset CDN/EdgeOne origin traffic.
Cross-region replication traffic package: Used to offset cross-region replication traffic.
Global acceleration traffic package: Used to offset global acceleration traffic. Based on the direction of data transmission acceleration, it is categorized into the following types:
Chinese mainland only: Can offset global acceleration traffic (uplink, downlink) fees for transmissions within the Chinese mainland, excluding finance cloud regions.
Includes Hong Kong (China) and overseas: Can offset global acceleration traffic (uplink, downlink) fees for transmissions in the directions of "Chinese mainland - Hong Kong (China) and overseas", "Hong Kong (China) and overseas - Hong Kong (China) and overseas", and "Hong Kong (China) and overseas - Chinese mainland".
Within the validity period of the traffic package, traffic generated in each cycle (including the day of purchase) can be deducted using the resource package specification. The portion that exceeds the deduction limit will be billed on a pay-as-you-go basis.
Traffic Pricing
Specific prices are subject to the real-time list prices published by the Tencent Cloud Pricing Center. Please go to the Product Pricing Center to view the latest unit prices and cost estimates. Details are as follows:
Traffic Generated When COS Is Used as a CDN Origin
After a user enables a CDN acceleration domain name, a series of fees will be incurred when that domain name is used to download and access data:
Billing Product
Billable Item
Description
Tencent Cloud COS
CDN origin-pull traffic fee
Back-to-origin traffic generated when data is transmitted from COS to Tencent Cloud CDN/EdgeOne edge nodes while users use COS as the origin site for CDN/EdgeOne.
Tencent Cloud CDN
CDN egress traffic fee
CDN/EdgeOne egress traffic generated when data is downloaded from CDN/EdgeOne edge nodes to the user's local environment or client while users use COS as the origin site for CDN/EdgeOne.
Tencent Cloud COS
COS request fee
When users use COS as the origin site for CDN/EdgeOne and data is transmitted from COS to Tencent Cloud CDN/EdgeOne edge nodes, COS request counts are generated. The request fees are billed by the number of requests sent to COS.
Note:
CDN traffic fee: This fee is charged by Tencent Cloud CDN/EdgeOne. For details, see CDN Pricing and Edge Pricing.
CDN back-to-origin traffic fee and COS request fee: These fees are charged by Tencent Cloud COS. For details, see COS Pricing.
CI Public Network Outbound Traffic Fees for COS Domain Names with CI Data Processing Parameters
When a user accesses a COS domain name with CI data processing parameters, the following fees will be incurred:
Note:
The processing parameters of Cloud Infinite (CI) enable operations such as Image Processing, audio/video processing, document preview, and file processing by appending data processing parameters to the suffix of a COS file URL.
Taking the scaling operation in Image Processing as an example, the following sample can scale the width and height of the sample.jpeg image in a COS bucket to 50% of the original size by carrying CI data processing parameters:
Original image: http://examples-1251000004.cos.ap-shanghai.myqcloud.com/sample.jpeg
After scaling: http://examples-1251000004.cos.ap-shanghai.myqcloud.com/sample.jpeg?imageMogr2/thumbnail/!50p
Billable Item
Description
CI-public network outbound traffic
Traffic generated by accessing links via COS domain names that carry CI processing parameters;
Traffic generated by directly accessing links via CI domain names.
CI-CDN origin-pull traffic
Back-to-origin traffic generated when data is transmitted from CI to Tencent Cloud CDN edge nodes after accessing links via COS domain names that carry CI processing parameters.
COS request fee
When users use COS as the origin site for CDN/EdgeOne and data is transmitted from COS to Tencent Cloud CDN/EdgeOne edge nodes, COS request counts are generated. The request fees are billed by the number of requests sent to COS.
Note:
The fees for CI-public network outbound traffic and CI-CDN back-to-origin traffic are charged by Tencent Cloud CI. For details, see the CI Traffic Fees Public Network Outbound Traffic section.
Billing Cases
Note:
The prices, resource package fees, and billing rules in this example are provided solely to illustrate the calculation method. Actual fees are subject to the prices, purchase pages, console displays, and actual bills on the Tencent Cloud official website at the time of user usage.
Case 1: STANDARD Storage Usage Fees + STANDARD Request Fees + Public Network Downstream Traffic Fees
Assume that on November 1, 2020, User A uploaded 10 GB of STANDARD storage data to a COS bucket in the Guangzhou region, which generated 100 requests. On the same day, User A spent CNY 3.6 to purchase a 10 GB public network downstream traffic package valid for one month and applicable across the Chinese mainland. On the second and third days, User A downloaded the 10 GB data to a local device via the public network without enabling CDN/EdgeOne. This download operation generated 100 requests per day. No other operations were performed during the remaining period. Storage usage fees, request fees, and traffic fees are settled daily. Then:
Standard storage usage fee: settled daily starting from November 2, 2020.
Request fee: settled on November 2, 3, and 4, 2020.
Traffic fee: settled on November 3 and 4, 2020.
The analysis based on the two billing methods is as follows:
Pay-as-you-go:
The STANDARD storage usage fee = (CNY 0.118/GB/month / 30) x 10 GB x 30 days = CNY 1.18.
The STANDARD request fee = CNY 0.01/10,000 requests x 100 requests / 10,000 x 3 = CNY 0.0003.
The public network downstream traffic fee = CNY 0.5/GB x 10 GB x 2 = CNY 10.
Traffic package: The 10 GB of public network downstream traffic generated on November 2, 2020 was deducted by the traffic package when billed on November 3, 2020. The 10 GB of public network downstream traffic generated on November 3, 2020 was billed on a pay-as-you-go basis when billed on November 4, 2020 because the traffic package quota had been exhausted, and was calculated as CNY 0.5/GB x 10 GB = CNY 5.
Based on the above analysis, the total cost for User A for the entire month of November is CNY (1.18 + 0.0003 + 3.6 + 5) = CNY 9.7803.
Case 2: STANDARD Storage Usage Fees + STANDARD Request Fees + Global Acceleration Traffic Fees + Public Network Downstream Traffic Fees
Assume that User B has a bucket in the Singapore region, which stores 100 GB of STANDARD data, and another bucket in the Tokyo region, which stores 200 GB of STANDARD data. On November 1, 2020, User B downloaded 10 GB and 20 GB of data from the Singapore bucket and the Tokyo bucket respectively via a global acceleration domain name from an office in Tokyo, Japan. These two download operations generated a total of 600,000 read and write requests. No other operations were performed during the remaining period. Fees incurred on the previous day are settled daily. Then:
Standard storage usage fee: settled daily starting from November 2, 2020.
Request fee: settled on November 2, 2020.
Global acceleration downstream traffic fee: settled on November 2, 2020.
Public network downstream traffic fee: settled on November 2, 2020.
The cost analysis is as follows:
STANDARD storage usage fees: billed on a pay-as-you-go basis, calculated as (CNY 0.136/GB/month / 30) x (100 GB + 200 GB) x 30 days = CNY 40.8.
STANDARD request fee: CNY 0.01/10,000 requests x 600,000 requests = CNY 0.6.
Global acceleration downstream traffic fee: CNY 1.25/GB x 10 GB = CNY 12.5. User B downloaded data from the Tokyo bucket from an office in Tokyo. This is an intra-region transfer, which does not use the acceleration link and therefore incurs no global acceleration downstream traffic fee.
Public network downstream traffic fee: CNY 0.5/GB x 10 GB + CNY 0.75/GB x 20 GB = CNY 20.
Based on the above analysis, the total cost for User B for the entire month of November is CNY (40.8 + 0.6 + 12.5 + 20) = CNY 73.9.
