Cost Allocation Tags for Application Cost Breakdown

SAA-C03 By islever Editorial Last updated

Design cost-optimized storage solutions.

Short answer

C Tag all the AWS resources with a key for cost and a value of the application's name. Activate cost allocation tags. Use Cost Explorer to get the desired information.

Question

A company has migrated several applications to AWS in the past 3 months. The company wants to know the breakdown of costs for each of these applications. The company wants to receive a regular report that includes this information. Which solution will meet these requirements MOST cost-effectively?
  1. Use AWS Budgets to download data for the past 3 months into a .csv file. Look up the desired information.
  2. Load AWS Cost and Usage Reports into an Amazon RDS DB instance. Run SQL queries to get the desired information.
  3. Tag all the AWS resources with a key for cost and a value of the application's name. Activate cost allocation tags. Use Cost Explorerto get the desired information. Correct Answer
  4. Tag all the AWS resources with a key for cost and a value of the application's name. Use the AWS Billing and Cost Management console todownload bills for the past 3 months. Look up the desired information.

Key Takeaways

The core concept tested is the necessity of Cost Allocation Tags to group AWS charges by logical business entities like applications, rather than just account-level totals.

This question addresses the most cost-effective method for tracking application-specific costs in AWS by leveraging Cost Allocation Tags and Cost Explorer. It establishes that tagging resources and activating these tags is the prerequisite for granular, automated cost reporting.

Common mistake: Learners often choose option D because it involves downloading bills, which seems like a direct way to get data. However, without activated Cost Allocation Tags, the billing reports do not contain the granular 'application' breakdown required, making manual lookups ineffective or impossible.

Expert Analysis

Why the Answer Is Correct

Option C is the correct answer because AWS Cost Allocation Tags allow you to categorize your AWS costs by specific keys (like "Application") and values (like the app name). Once these tags are applied to resources and activated in the Billing Console, AWS begins to track them. Cost Explorer then automatically aggregates this tagged data, allowing you to view and filter costs by application with zero additional infrastructure cost. This meets the requirement for a regular report and breakdown MOST cost-effectively.

Why the Other Options Are Wrong

Option A (AWS Budgets) is designed for setting spending limits and alerts, not for generating detailed historical cost breakdowns by application. Option B (RDS) introduces unnecessary complexity and cost by spinning up a database instance just to store CSV data that could be viewed directly in Cost Explorer. Option D suggests downloading bills but fails to mention activating Cost Allocation Tags; without activation, the billing console does not display the segmented cost data needed to separate applications.

Community Comment Notes

Community consensus strongly supports Option C. One user noted that "cost explorer allows cost analysis of up to 13 months," highlighting its utility for ongoing monitoring. Another commenter referenced the official documentation on organizing costs using tags, reinforcing that tagging is the foundational step for this type of analysis. The vote distribution (78% for C) reflects a solid understanding that automation via tags is superior to manual bill downloads.

Official Reference

https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/cost-alloc-tags.html

This link opens the official vendor documentation in a new tab.

Exam Strategy

Always look for "Cost Allocation Tags" when the exam asks about grouping costs by project, team, or application. Remember that simply tagging a resource is not enough; you must activate the tag key in the Billing Console for it to appear in Cost Explorer or detailed billing reports.

Frequently Asked Questions

Do I need to activate tags before they show in Cost Explorer?

Yes. You must explicitly activate Cost Allocation Tags in the Billing Console. Until activated, AWS ignores them for billing segmentation.

Why is RDS not the most cost-effective solution here?

Running an RDS instance incurs hourly costs. Cost Explorer is included with AWS billing at no extra charge, making it far more cost-effective for simple reporting.

More SAA-C03 FAQ →

Community Votes

C
78%
D
22%

78% of anonymous learners picked answer C. Votes are pick records left by other test-takers — they are not the verified answer.

Discussion 3 contributions

Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.

From public community threads 3

  1. spoved 👍 3 Answered C
    - Organizing and tracking costs using AWS cost allocation tags https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/cost-alloc-tags.html - Cost Explorer uses the same dataset that is used to generate the AWS Cost and Usage Reports and the detailed billing reports. For a comprehensive review of the data, you can download it into a comma-separated value (CSV) file. https://docs.aws.amazon.com/cost-management/latest/userguide/ce-what-is.html
  2. ccceb01 👍 2 Answered D
    https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/cost-alloc-tags.html
  3. rpmaws 👍 2 Answered C
    cost explorer allows cost analysis of up to 13 months.

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