Azure VM Pricing & Cost Tips

VM Cost Components

Many people think VM cost = compute cost. In reality, a VM has several cost components:

Pricing Models Compared

Real Pricing Examples

Approximate monthly costs for common VM sizes in Central India (pay-as-you-go, Linux):

Azure Hybrid Benefit

If your organisation has existing Windows Server or SQL Server licences with Software Assurance, you can reuse them on Azure VMs — instead of paying for a new licence in the VM price.

Windows Server Hybrid Benefit

• Each 2-core Windows Server licence covers 1 Azure vCore
• Saves approximately 40–49% on Windows VM compute cost
• Available for Windows Server 2008 R2 and above

SQL Server Hybrid Benefit

• Reuse existing SQL Server licences on Azure SQL VMs
• Can save up to 55% on SQL Server VM costs
• Available for SQL Server 2008 and above

az vm update \
  --resource-group myResourceGroup \
  --name myWindowsVM \
  --license-type Windows_Server

Reserved Instances — Deep Dive

Reserved Instances (RIs) are the single biggest lever for reducing stable VM costs. Here's everything you need to know:

How They Work

You commit to using a specific VM size in a specific region for 1 or 3 years. In return, Azure gives you a discount. The VM keeps running as normal — nothing changes technically. You just pay less.

Flexibility

• Instance size flexibility — By default, a reservation can apply to VMs of different sizes within the same series (e.g., a D4s_v5 reservation can cover a D8s_v5 VM)
• Exchange — You can exchange a reservation for a different size or region (one-time, with restrictions)
• Cancellation — Can be cancelled with a penalty (12% early termination fee)

When to Reserve

• Production VMs running 24/7 for at least 1 year
• Database servers, application servers, or any stable baseline infrastructure
• When you're confident about the VM size (right-size first, then reserve)

Right-Sizing with Azure Advisor

Azure Advisor continuously monitors your VM usage and recommends cost optimisations. It identifies VMs using less than 5% CPU consistently — candidates for downsizing.

Portal → Search "Advisor" → Cost tab → "Right-size or shutdown underutilized virtual machines"

Advisor shows you exactly which VMs are over-provisioned, what size to downsize to, and how much you'll save per month.

Top 10 Cost-Cutting Tips

1. Enable Auto-Shutdown on Dev/Test VMs

Save 50–70% on dev VM costs by shutting them down outside working hours.

2. Delete VMs You're Not Using — Don't Just Stop Them

A stopped (OS-level) VM still charges for compute. Deallocate it or delete it completely.

3. Delete Orphaned Disks and Public IPs

After deleting a VM, check for leftover disks and public IPs that are still billing.

4. Use Reserved Instances for Stable Workloads

Save 40–72% on VMs that run continuously. The most impactful single change.

5. Use Spot VMs for Batch Jobs

Up to 90% savings for fault-tolerant, interruptible workloads.

6. Right-Size with Azure Advisor

Many teams over-provision. Advisor finds unused capacity and recommends smaller sizes.

7. Use Linux Instead of Windows Where Possible

Linux VMs are ~40% cheaper — no OS licence fee.

8. Use Azure Hybrid Benefit

If you have existing Windows/SQL licences with Software Assurance, activate Hybrid Benefit.

9. Choose the Right Region

VM prices vary by region. East US is often 10–20% cheaper than some other regions for the same size.

10. Set Budget Alerts

Configure Azure Cost Management budgets to alert you at 80% and 100% of monthly budget — so surprises never happen.

Using the Pricing Calculator

Always estimate costs before deploying. The Azure Pricing Calculator at azure.microsoft.com/pricing/calculator lets you configure VMs and see exact monthly costs.

For a VM estimate, configure:

• Region — Central India
• Operating System — Linux or Windows
• Tier — Standard
• VM Size — select your target size
• Pricing Option — Pay as you go / 1-year reserved / 3-year reserved
• Hours — how many hours per month (730 = 24/7, 240 = 8 hrs/day weekdays)
• Managed OS Disk — add your disk type and size