Azure Cosmos DB Pricing
Understand the cost of Azure Cosmos DB for your applications. Pricing is based on the throughput (Request Units per second - RU/s) and storage (GB) consumed by your database. Azure Cosmos DB offers various API options, each with its own pricing nuances.
Pricing Overview
Request Units (RU/s)
This is the cost for provisioned throughput. You pay for the RUs you reserve for predictable workloads.
Learn MoreStorage
The cost of storing your data in Azure Cosmos DB. This includes indexes.
Learn MoreServerless
Ideal for variable workloads. You only pay for the RUs and storage you consume.
Learn MoreProvisioned Throughput (RU/s)
Azure Cosmos DB uses Request Units (RUs) as a logical unit of measure for throughput. A RU is a normalized measure of throughput required to execute various database operations. The number of RUs consumed by an operation depends on its complexity.
You can provision throughput at the container or database level. Database-level throughput is shared across all containers within that database.
Throughput Tiers and Pricing (Standard Provisioned Mode)
| Region | Throughput (RU/s) | Cost per RU/s/hour | Notes |
|---|---|---|---|
| East US | 100 - 100,000 | $0.000007 | Standard pricing |
| West Europe | 100 - 100,000 | $0.000008 | Slightly higher due to region costs |
| Japan East | 100 - 100,000 | $0.0000075 | Regional variations |
| Higher Tiers (e.g., 1M RU/s) | Custom | Negotiated rates may apply | Contact Sales for enterprise agreements |
The cost of throughput is calculated as: (Provisioned RU/s) * (Cost per RU/s/hour) * (24 hours/day) * (30 days/month).
Storage Costs
Storage is measured in gigabytes (GB) per month. This includes the data stored in your containers, as well as the associated indexes.
Storage Pricing
| Region | Cost per GB / Month |
|---|---|
| East US | $0.18 |
| West Europe | $0.20 |
| Asia Pacific | $0.19 |
The cost of storage is calculated as: (Total GB consumed) * (Cost per GB / Month).
Serverless Pricing
Azure Cosmos DB Serverless offers a pay-as-you-go model, ideal for unpredictable workloads, development, and testing.
- Request Units (RUs): Charged per million RUs consumed.
- Storage: Charged per GB per month.
Serverless Costs (Example)
| Region | RU Cost (per 1M RUs) | Storage Cost (per GB/Month) |
|---|---|---|
| East US | $0.00003 | $0.18 |
| West US | $0.000032 | $0.19 |
With Serverless, you don't need to provision throughput; Cosmos DB automatically scales based on demand.
Additional Pricing Considerations
- Multi-region Writes: There is an additional charge for enabling multi-region writes.
- Backup and Restore: Continuous backup and point-in-time restore features incur additional costs.
- Autoscale: While not a direct cost, autoscale helps optimize costs by automatically scaling RU/s based on usage.
- API Type: While the core RU and storage pricing is similar across APIs (Core SQL, MongoDB, Cassandra, Gremlin, Table), specific nuances might exist.
For detailed and region-specific pricing, please refer to the official Azure Cosmos DB pricing page.
Use the Azure Pricing Calculator to estimate your costs.