Tags, Cost Management & Azure Advisor

Resource tags

Tag rules and limits

Rule	Detail
Max tags per resource	50 name-value pairs
Tag name max length	512 characters
Tag value max length	256 characters
Inheritance	Tags are NOT inherited (use Policy to enforce)
Tag names	Case-insensitive for operations, case-preserving
Tag values	Case-sensitive
Apply to	Resources, resource groups, subscriptions

💡 Exam tip: Tags are NOT inherited

This is a classic exam trap. Putting a tag on a resource group does NOT automatically tag the resources inside. If you need all resources in a group to have a specific tag, use Azure Policy with a Modify or Append effect to enforce tag inheritance.

For example, the built-in policy “Inherit a tag from the resource group if missing” automatically copies a specified tag from the parent resource group to new resources.

Enforcing tags with Azure Policy

Common tag policies (all built-in — no need to write custom JSON):

Policy	Effect	What It Does
Require a tag on resources	Deny	Blocks resource creation if a specified tag is missing
Require a tag on resource groups	Deny	Blocks RG creation without required tags
Inherit a tag from the resource group	Modify	Copies a tag from the RG to new resources
Inherit a tag from the subscription	Modify	Copies a tag from the subscription to new RGs
Append a tag and its value	Append	Adds a default tag if not present

Real-world: TechCorp's tagging strategy

TechCorp Solutions uses these mandatory tags across all resources:

• Environment — Production, Staging, Development, Test
• CostCenter — maps to finance department codes
• Owner — email of the responsible person
• Project — project name for cost allocation

Alex configured a Deny policy requiring CostCenter and Environment tags on all new resources. A Modify policy inherits the Owner tag from the resource group. Within a month, their cost reports went from “which subscription spent what?” to “which project in which department spent what?”

Azure Cost Management

Azure Cost Management is built into the Azure portal and helps you track, analyse, and optimise cloud spending.

Key features:

• Cost analysis — visualise costs by resource, resource group, tag, region, service
• Budgets — set spending limits with alerts at thresholds (e.g., alert at 80%, 100%)
• Alerts — email notifications when spending approaches or exceeds budgets
• Recommendations — optimisation suggestions (powered by Azure Advisor)
• Exports — schedule cost data exports to storage accounts for external analysis

Budgets and alerts

Budgets are the primary tool for cost governance:

1. Create a budget — set a monthly or quarterly amount (e.g., $5,000/month)
2. Set alert thresholds — trigger at percentage or actual amount (e.g., 50%, 80%, 100%)
3. Configure actions — email notifications, action groups, or even automated shutdown

Budget Setting	What It Controls
Scope	Subscription, resource group, or management group
Amount	The spending target (e.g., $5,000/month)
Reset period	Monthly, quarterly, annually
Alert threshold	Percentage or actual cost at which to trigger
Alert recipients	Email addresses or action groups

Important: Budgets are alerts only — they do NOT automatically stop resources from being created or running when the budget is exceeded. For hard limits, you’d need automation via action groups or Azure Functions.

💡 Exam tip: Budgets don't automatically stop spending

A very common misconception: setting a $1,000 budget does NOT cap spending at $1,000. It sends alerts. Resources continue running and incurring costs. To actually stop spending, you’d need to configure an action group that triggers an Azure Function or Logic App to shut down resources.

Azure Advisor

Azure Advisor is a personalised recommendation engine that analyses your resource configuration and usage patterns.

Advisor recommendation categories:

Category	What It Recommends	Example
Cost	Reduce spending	”Resize VM from D8 to D4 — it’s using only 20% CPU”
Security	Improve security posture	”Enable MFA for all admin accounts”
Reliability	Improve availability	”Add a second VM to your availability set”
Operational Excellence	Improve management	”Enable diagnostic logs on your SQL database”
Performance	Improve speed	”Move your storage to the same region as your app”

Real-world: CloudFirst Labs saves money with Advisor

CloudFirst Labs was spending $8,000/month on Azure. Alex checked Advisor’s cost recommendations and found:

• 3 VMs were oversized (40% CPU average) → right-sizing saved $1,200/month
• 5 unattached managed disks from deleted VMs → deleting them saved $150/month
• Reserved Instances for their 2 always-on databases → saved $800/month

Total savings: $2,150/month (27% reduction) just from following Advisor recommendations. Now Alex checks Advisor weekly as part of his routine.

Question

Are resource tags inherited from a resource group to the resources inside it?

Click or press Enter to reveal answer

Answer

No. Tags are NOT automatically inherited. You must use Azure Policy (Modify effect) to enforce tag inheritance. The built-in policy 'Inherit a tag from the resource group if missing' can automate this.

Click to flip back

Question

What happens when an Azure budget threshold is exceeded?

Click or press Enter to reveal answer

Answer

An alert notification is sent (email or action group). The budget does NOT automatically stop resources or cap spending. Resources continue running. To enforce hard spending limits, you need automation (e.g., Azure Functions triggered by the alert).

Click to flip back

Question

What are the five Azure Advisor recommendation categories?

Click or press Enter to reveal answer

Answer

Cost (reduce spending), Security (improve security posture), Reliability (improve availability), Operational Excellence (improve management), and Performance (improve speed). Advisor analyses your actual resource usage to generate personalised recommendations.

Click to flip back

Question

How many tags can a single Azure resource have?

Click or press Enter to reveal answer

Answer

A maximum of 50 tag name-value pairs per resource. Tag names are limited to 512 characters and tag values to 256 characters.

Click to flip back

Knowledge check

Knowledge Check

TechCorp Solutions wants all resources in their Production subscription to have a 'CostCenter' tag. New resources without this tag should be blocked. What should Alex configure?

AA tag inheritance policy with Modify effectBA policy with Deny effect requiring the CostCenter tagCA budget alert that notifies when untagged resources appearDA resource lock on the subscription

Check Answer

Knowledge Check

CloudFirst Labs set a $5,000 monthly budget with an alert at 80%. They've now spent $4,500. What happened?

AAzure automatically paused all running resourcesBAn alert email was sent when spending hit $4,000 (80%)CNew resource deployments were blockedDNothing — alerts only trigger at 100%

Check Answer

Knowledge Check

Azure Advisor recommends that Meridian Financial resize a VM from Standard_D8s_v3 to Standard_D4s_v3. What category does this recommendation fall under?

ASecurityBReliabilityCCostDPerformance

Check Answer

🎬 Video coming soon