Regarding Bandwidth hike issue.

Question

Regarding Bandwidth hike issue.

shivram prasad 0

We are seeing a sudden increase in bandwidth usage in our Azure Storage account. Previously, bandwidth usage and cost were zero, but now charges have risen unexpectedly to nearly ₹1,000 per day. We need clarification on why bandwidth costs are being incurred and guidance on how to monitor and control them.

shivram prasad 0 Reputation points

2026-05-05T12:31:17.5766667+00:00

This issue requires a support ticket for further investigation for the bandwidth hike in the Bolb storage account. Please call me between FORM 11 O'CLOCK AND 5.30 IST in the evening.
Suchitra Suregaunkar 14,000 Reputation points Microsoft External Staff Moderator

2026-05-05T12:50:34.35+00:00

Hello @shivram prasad

Thank you for posting your query on Microsoft Q&A platform.

We are looking into this issue and will keep you posted updates.

Thanks,
Suchitra.
Suchitra Suregaunkar 14,000 Reputation points Microsoft External Staff Moderator

2026-05-12T15:02:37.14+00:00

Hello @shivram prasad

Please let us know if the suggested resolution helped/ addressed your concern. If it did, we’d appreciate your feedback on the proposed resolution as it helps others with similar issues.

If the resolution did not help, feel free to share more details about the challenge you’re still facing. Any additional information such as your current issue or specific errors will help us perform a deeper analysis and provide more targeted guidance.

We’re happy to continue assisting and work with you toward the right solution.

Thanks,

Suchitra.

1 answer

Your answer

shivram prasad 0 Reputation points

2026-05-05T12:31:17.5766667+00:00

This issue requires a support ticket for further investigation for the bandwidth hike in the Bolb storage account. Please call me between FORM 11 O'CLOCK AND 5.30 IST in the evening.
Suchitra Suregaunkar 14,000 Reputation points Microsoft External Staff Moderator

2026-05-05T12:50:34.35+00:00

Hello @shivram prasad

Thank you for posting your query on Microsoft Q&A platform.

We are looking into this issue and will keep you posted updates.

Thanks,
Suchitra.
Suchitra Suregaunkar 14,000 Reputation points Microsoft External Staff Moderator

2026-05-12T15:02:37.14+00:00

Hello @shivram prasad

Please let us know if the suggested resolution helped/ addressed your concern. If it did, we’d appreciate your feedback on the proposed resolution as it helps others with similar issues.

If the resolution did not help, feel free to share more details about the challenge you’re still facing. Any additional information such as your current issue or specific errors will help us perform a deeper analysis and provide more targeted guidance.

We’re happy to continue assisting and work with you toward the right solution.

Thanks,

Suchitra.

Answer 1

Hello @shivram prasad

In Azure, bandwidth charges are incurred when data leaves the Azure datacenter (egress).

Data ingress (uploading data into Azure) → Free
Data egress (downloading or transferring data out of Azure) → Charged

This means that if your bandwidth cost was previously zero and has now increased, it indicates that data is now being transferred out of the storage account, which was not happening earlier.

Below are the common scenarios that trigger bandwidth egress cost:

Downloading data from storage (via applications, users, APIs)
Data transfer to on‑premises systems or external services
Data transfer to another Azure region
Replication scenarios such as geo-redundant storage (GRS/RA‑GRS)

Azure confirms that any outbound data transfer is billed depending on the destination and volume .

To pinpoint what is generating the cost, please follow these steps:

Review Cost Analysis
- Go to: Azure Portal → Cost Management → Cost Analysis
- Filter by your storage account
- Group by Meter or Meter Category
- Look for entries such as:
- Data Transfer Out
- Bandwidth
Validate the usage details
- Download the usage (CSV) from Cost Management
- Filter for Bandwidth/Data Transfer meters
- This will help identify:
- When the spike started
- Which meter (internet, inter-region, etc.) is responsible
Check storage metrics
- Navigate to: Storage Account → Monitoring → Metrics
- Review:
- Egress
- Transactions (especially read/Get operations)

User's image

Azure Monitor provides these metrics by default for analysis.

Identify and review any new or recently modified workloads accessing the storage account
Minimize unnecessary data reads/downloads
Ensure compute and storage resources are in the same region to avoid cross-region charges
Review if replication (GRS/RA‑GRS) is required
Consider using Azure CDN if data is being served frequently over the internet

For your reference, here are the relevant Microsoft documents explaining this behavior:

Azure Bandwidth Pricing https://azure.microsoft.com/pricing/details/bandwidth/
Azure Storage monitoring (metrics and insights) https://learn.microsoft.com/azure/storage/common/storage-insights-overview
Ingress vs Egress behavior in Azure https://learn.microsoft.com/en-us/answers/questions/1857941/ingress-and-egress-cost-in-azure

Thanks,

Suchitra.

Suchitra Suregaunkar 14,000 Reputation points Microsoft External Staff Moderator

2026-05-15T09:32:03.2333333+00:00

Hello @shivram prasad

Thank you for the upvote.

We are glad that the provided information helped you. Along with that Accepting the answer is equally important because it confirms the resolution and helps others in the community quickly find verified solutions. It also reflects the success of our joint effort to resolve your query. If anything is still unclear or you need further assistance, please let us know.

We are happy to help.

So, kindly consider marking the answer as Accepted and this helps other community members who may encounter a similar issue in the future.

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Regarding Bandwidth hike issue.

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