OSS charges on a pay-as-you-go basis.
Storing data in OSS incurs a storage fee based on duration. Each upload, download, or access incurs a request fee, and public internet distribution incurs outbound data transfer fees. Value-added services such as CDN acceleration, image processing, Transfer Acceleration, and DDoS protection generate additional billable items.
If your workload has predictable usage, purchase a resource plan to reduce costs. A resource plan must precisely match the billable item it covers. For example, a data transfer plan offsets only outbound data transfer fees. A mismatched plan will not apply to your bill.
Pricing
Full pricing details are on the OSS Product Pricing.
Billable items
OSS has two categories of billable items:
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Basic billable items: Common charges for most OSS users, including the storage fee for stored data, outbound data transfer fees for downloads or CDN distribution, and the request fee for read and write requests.
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Billable items for value-added services: Optional services such as image processing, Transfer Acceleration, and DDoS protection. Billable items for value-added services.
Billing diagram
The following diagram shows all OSS billable items.
Billing methods
OSS supports two billing methods:
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Pay-as-you-go: A post-paid method where you pay for actual usage of each billable item. Ideal for workloads with fluctuating usage.
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Resource plans: A pre-paid method. Purchase resource plans for common billable items such as storage and outbound data transfer to receive a discount. Usage is first deducted from the plan; excess usage is billed on a pay-as-you-go basis. Suitable for workloads with stable usage.
Selecting an outbound data transfer plan
An outbound data transfer plan is a pre-paid resource plan that offsets only outbound data transfer fees generated by public internet downloads. If you regularly serve video files or large objects from OSS over the public internet, purchasing a data transfer plan can reduce your costs compared to pay-as-you-go pricing.
Estimating your monthly traffic
Use the following formula to estimate monthly outbound traffic for video playback scenarios:
Traffic (GB) ≈ Bitrate (Mbps) × Daily average watch time (h) × 3,600 × 30 ÷ 8 ÷ 1,024
Example: For a 5 Mbps video stream viewed for an average of 4 hours per day:
5 × 4 × 3,600 × 30 ÷ 8 ÷ 1,024 ≈ 264 GB/month
Based on this estimate, select the 300 GB plan to ensure sufficient coverage.
You can also review your historical outbound traffic data in the OSS console to verify your estimates before purchasing a plan.
Available plan sizes
Outbound data transfer plans are available in 12 sizes:
100 GB, 200 GB, 300 GB, 500 GB, 1 TB, 2 TB, 5 TB, 10 TB, 30 TB, 50 TB, 100 TB, 500 TB
Selecting the right plan
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Estimate your monthly outbound traffic using the formula above, or check your historical usage data in the console.
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Choose a plan size that is slightly larger than your estimated monthly traffic to accommodate usage fluctuations.
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An outbound data transfer plan covers only outbound data transfer fees for public internet downloads. It does not cover CDN outbound traffic fees, intranet transfer, or other billable items. A mismatched plan will not apply to your bill.
Free tier
First-time OSS users are eligible for a free tier that provides a certain amount of Standard (LRS) storage capacity, outbound data transfer, and request counts at no charge.
Billing cycle
OSS meters resource usage and calculates fees on an hourly basis.
Take storage fees as an example. The Object Storage Service pricing page specifies that the unit price for storage fees is CNY/GB/month, but billable items are charged on an hourly basis. The calculation method is Actual resource usage × Hourly unit price. Therefore, you need to convert the monthly unit price for storage to an hourly unit price. For example, the unit price for Standard (Locally Redundant Storage) is CNY 0.12/GB/month, and its corresponding hourly unit price is approximately CNY 0.000167/GB/hour (0.12 ÷ 30 ÷ 24).
References
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Fee Calculator: Select Object Storage Service in the calculator and enter parameters such as storage capacity, number of requests, and outbound data transfer to estimate your OSS usage fees.
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OSS Pricing: View detailed pay-as-you-go and subscription pricing for OSS.