MSDEVBUILD / azure

Factors That Affect Azure Costs

Cloud server ONOFF METER 💰 paying for use ⏸ switched off: no compute bill Switch it off and the meter stops. Pay only for what you use.
Size, time, region, data leaving Azure and forgotten resources all turn the meter.

😟 THE PROBLEM

The bill doubled this month without any new features.

😊 THE SOLUTION

Understand the cost factors and check each one.

  • Forgotten disks and IPs✓ Clean up orphaned resources
  • Expensive region chosen✓ Compare regional prices
  • Data flowing out of Azure✓ Reduce egress and cross-region traffic
🛠️ Solved with: Azure cost factors
Try it yourself in the Azure simulator No Azure account needed. Launch a VM and save money 🖥️ Try it ❯
Module 3: Management & Governance ⏱ 6 min read Updated 11 Nov 2026

Quick answer

Azure costs depend on several factors: the resource type and its settings (size, tier, redundancy), consumption (how much and how long you use it), maintenance (cleaning up unused resources), geography (prices differ by region), network traffic (outbound data transfer), the subscription type and any Azure Marketplace purchases.

Exam objective: 3.1.1 Describe factors that can affect costs in Azure. (Skills measured as of July 20, 2026)

Start with a question

Two teams run the same app on Azure. Why does one pay twice as much?

Different region, bigger sizes, data flowing out of Azure, and forgotten resources. Every one of these is a cost factor.

Explain it like I’m 10

The technical explanation

FactorExample
Resource typeVM size, storage tier and redundancy, database tier
ConsumptionHours a VM runs, GB stored, number of executions
MaintenanceDeleting unused VMs, disks, IPs, old snapshots
GeographyThe same service costs different amounts in different regions
Network trafficOutbound data transfer and inter-region traffic
Subscription typeFree trials, student credits, enterprise agreements
Azure MarketplaceThird-party solutions billed through Azure

Real-world business scenario

Enterprise

A start-up

The problem
The monthly bill doubled without any new features.
What they used
Used Cost Management analysis to find 40 orphaned disks, a forgotten test VM and heavy cross-region traffic.
Why that choice
Understanding cost factors shows where to look.
The result
The bill dropped back after cleaning up and moving chatty services into one region.

When to use it and when not to

✓ Use it when…

  • Review cost factors before every design decision and monthly afterwards.

✕ Think twice when…

  • Choosing regions or sizes without checking price differences.
Ready for more?The full lesson adds the technical explanation, when to use it, interview questions and revision notes.

Interview preparation

Say your answer out loud first, then open the model answer. Interviewers care more about your reasoning than the exact words.

Beginner What affects how much you pay for Azure?

Model answer

What you deploy and how big it is, how long it runs, which region it's in, how much data leaves Azure, whether you clean up unused resources, your subscription type and any Marketplace products you buy.

Intermediate Why can the same VM cost different amounts?

Model answer

Region (local costs and taxes differ), OS licensing (Windows costs more than Linux unless using Azure Hybrid Benefit), size and series, pricing model (pay-as-you-go, reservation, savings plan or Spot) and how long it runs.

Experienced developer Which hidden costs do teams often miss?

Model answer

Egress and cross-region traffic, orphaned disks and public IPs, log ingestion and retention in Log Analytics, premium storage transactions, idle App Service plans, and Marketplace licences billed through Azure.

Test yourself with exercises

3 original practice questions in the AZ-900 style. Pick your answers, then check them. You will see why each option is right or wrong. Score 75% or more and this topic is marked complete.

Question 1

Question 1 of 3 · Select 2

Which TWO factors affect the cost of an Azure VM?

Question 2

Question 2 of 3

Which type of network traffic is generally NOT charged?

Question 3

Question 3 of 3

After deleting VMs, your storage costs remain high. What is the most likely cause?

Quick revision

Key points

  • Resource type and settings drive cost.
  • Consumption = how much and how long.
  • Prices vary by region.
  • Outbound data transfer is charged; inbound is generally free.
  • Clean up unused resources (maintenance).

Important terminology

Resource type
The kind of service and its settings, such as VM size, storage tier or redundancy.
Egress
Data leaving Azure or moving between regions, which is usually charged.
Orphaned resource
A resource left behind after its parent is deleted, such as a disk after a VM, which still costs money.
Azure Marketplace
A store of third-party solutions, billed through your Azure subscription.

Common mistakes

  • Forgetting orphaned disks and IPs after deleting VMs.

Exam tips

  • Know the list. Resource type, consumption, maintenance, geography, network traffic, subscription type, Marketplace.

Five quick revision questions

  1. 1.Do Azure prices vary by region?Show

    Yes.

  2. 2.Is inbound data transfer usually charged?Show

    No. Outbound (egress) usually is.

  3. 3.What is an orphaned resource?Show

    A leftover resource, such as a disk after its VM is deleted, that still costs money.

  4. 4.How are Marketplace products billed?Show

    Through your Azure subscription.

  5. 5.Name two settings that change a storage account's cost.Show

    Access tier and redundancy (also performance).

Official references

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