How can I get reservation recommendations for Azure Backup ?

Hi ,

Thanks for reaching out to Microsoft Q&A.

No, as of now, Azure doesn’t expose reservation recommendations for Azure Backup Storage via the same “Reservation Recommendations API” that works for compute/SQL/etc.

Since the Reservation Recommendations API doesn’t support Backup Storage, here’s how you can manually get data and make reservation decisions:

1. Get Backup Storage Usage Metrics
   • Use Azure Monitor / Metrics to see storage consumption on vaults over a rolling 7/30/60 day window.
   • The Backup documentation / REST APIs may expose usage or job-level storage data.
   • Example: you might fetch “Cloud Backup Storage Used” metric for your Recovery Services vault across time.
2. Estimate What Reservation Size Makes Sense
   • Based on historical usage peaks (say the maximum monthly backup storage used), decide on a reservation size (100 TiB).
   • Model savings: compare costs with reservation vs pay-as-you-go for 1 or 3 years, using pricing from Azure Backup pricing page.
3. Purchase via Portal / REST
   • You can purchase Backup Storage reserved capacity via Azure Portal or via the Portal UI in “Optimize Costs for Azure Backup Storage”.
   • There is no documented API for programmatically retrieving reservation recommendations for Azure Backup Storage, but you might be able to script a combination: pull usage metrics, compute your own recommendation logic, then call APIs to purchase via Azure Reservations if applicable or the appropriate purchase flow.

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Hi Ananya, Thanks for posting your question in Microsoft Q&A forum

Thanks for your response Vinodh247

As he mentioned, Azure Backup does not currently provide automated reservation recommendations. Unlike Virtual Machines, SQL Database, or Managed Disks, there is no built-in service that analyzes your backup usage and suggests the optimal reserved capacity purchase.

Reservation Recommendations API of azure backup doesn't include in the list of supported resource type. check the list resources supported using below commands in the doc

Refer: Reservation Recommendations - List - REST API (Azure Consumption) | Microsoft Learn

Azure Backup’s usage pattern is different from other supported resources:

• Backup storage grows and shrinks dynamically based on protected data and retention policies, making automated predictions harder.
• Reserved capacity for Backup is vault-based, not per-resource, so recommendations would need to consider aggregated backup data across vaults, subscriptions, and retention periods.
• Microsoft currently expects customers to manually estimate storage requirements using historical usage (like Azure monitor metrics, logs) then purchase reserved capacity.

Refer: Optimize costs for Azure Backup Storage with reserved capacity - Azure Backup | Microsoft Learn

I hope the provided answer is helpful, do let me know if you have any further questions on this Please accept as Yes and upvote if the answer is helpful so that it can help others in the community.