A subscription is a logical container used to provision and manage Azure resources. It is closely tied to billing and acts as a boundary for resource management and deployment. ### Billing All Azure resource usage gets billed to the payment method of the subscription - Free subscriptions - Pay as you go - Enterprise agreements  - **Design Considerations:** - **Governance:** Use [[Azure Policy]] at the management group level. - **Hierarchy:** Keep it flat for simplicity. - **Shared Services:** Use dedicated subscriptions for common resources. - **Scale Limits:** Separate subscriptions for large workloads. - **Administrative Management:** Clear separation of concerns/duties with subscriptions. - **Network Topologies:** Consider communication needs across subscriptions. - **Access Reviews:** Regularly review subscription roles and responsibilities.