Billable items in COS include storage usage, requests, data retrievals, traffic, and management features. The following describes each billable item in detail.

Note：

COS offers the following object storage classes for different access frequencies and disaster recovery needs: INTELLIGENT TIERING, STANDARD, STANDARD_IA, ARCHIVE, and DEEP ARCHIVE. For more information, please see Storage Class Overview.

Pricing

You can learn about COS billable items and Product Pricing to estimate your COS fees.

Storage Usage Fees

Billing restrictions

1. STANDARD_IA: Storage duration of fewer than 30 days will be calculated as 30 days. A single stored file less than 64 KB will be calculated as 64 KB; otherwise, files are calculated based on their actual sizes.
2. ARCHIVE: available in public cloud regions only. Storage duration of fewer than 90 days will be calculated as 90 days. A single stored file less than 64 KB will be calculated as 64 KB; otherwise, files are calculated based on their actual sizes.
3. DEEP ARCHIVE: available only in Beijing, Guangzhou, and Chengdu regions. Storage duration of fewer than 180 days will be calculated as 180 days. A single stored file less than 64 KB will be calculated as 64 KB; otherwise, files are calculated based on their actual sizes.
4. If you successfully uploaded an object to STANDARD_IA or ARCHIVE with versioning not enabled, COS will delete the existing object (if any) that has the same name. In this case, storage fees will still be incurred for early deletion of the object.
5. For INTELLIGENT TIERING, storage usage fees of objects are consistent with the storage class after storage class movement. In addition, you will be charged the object monitoring fees.

Request Fees

Request fees include the fees incurred by user requests and backend requests generated by feature configuration.

• User requests: include requests to Tencent COS to upload, download, query, delete, and perform other operations via APIs, SDKs, or console.
• Backend requests: include requests to delete STANDARD copies after lifecycle transition or STANDARD copies restored from ARCHIVED expired, read/write data for cross-region replication, and deliver inventory reports.

Billing restrictions

1. Both successful and failed requests are billed.
2. The minimum counting unit for the number of requests is 10,000. Therefore, if the monthly accumulated requests is less than 10,000, you will still be billed for 10,000 requests, regardless of request success or failure.
3. Data in the ARCHIVE and DEEP ARCHIVE storage classes cannot be read or downloaded. If you restore objects from ARCHIVE to STANDARD, you will be billed at STANDARD rates; if you restore objects in the DEEP ARCHIVE storage class, you will be billed at DEEP ARCHIVE rates.
4. Retrieving DEEP ARCHIVED data will incur data retrieval request fees.
5. For INTELLIGENT TIERING, request fees are subject to those of the storage class after storage class movement.

Data Retrieval Fees

Billing restrictions

Storage classes suitable for cold data include STANDARD_IA, ARCHIVE, and DEEP ARCHIVE. To read or download data in STANDARD_IA, COS needs to retrieve it first. ARCHIVED data cannot be read or downloaded until it is restored (unfrozen) to the STANDARD storage class.

Traffic Fees

Traffic fees are calculated based on the accumulated traffic generated by reading the data stored.

Billing restrictions

1. ARCHIVED data cannot be read or downloaded. The data can only be read after being restored to the STANDARD storage class. Therefore, traffic generated from these requests is counted in the STANDARD storage class.
2. Public network downstream traffic is generated when the data is returned to COS through origin-pull using a third-party CDN service.
3. After CDN acceleration is enabled, CDN origin-pull traffic is generated when a user browses or downloads COS data on the client through a Tencent Cloud CDN acceleration endpoint.
4. Public network downstream traffic is generated when a user downloads objects through object links or browses objects through a static website endpoint.
5. Cross-region replication traffic is generated when you replicate data from a bucket in one region to a bucket in another region using APIs or the cross-region replication feature. The traffic fees vary, depending on the region where the source bucket resides.
6. For INTELLIGENT TIERING, traffic fees are subject to those of the storage class after storage class movement.

Note：

Tencent Cloud products within the same region access each other over the private network by default and no traffic fees will be incurred. For more information on how to identify private network access, please see COS Access via Private Network and Public Network.

Traffic trends

The figure below shows the traffic fees incurred by data transmitted from COS to an end user with Tencent Cloud CDN acceleration endpoint enabled and disabled, respectively.

Management Feature Fees

Management feature fees are calculated based on the use of COS management features, such as inventory and COS Select.

Billing restrictions

Currently, INTELLIGENT TIERING does not support the COS Select and batch operation features.