4.2 Billing and Cost Management Tools
Key Takeaways
- AWS Cost Explorer visualizes and manages AWS spending over time with filtering, grouping, and forecasting capabilities.
- AWS Budgets lets you set custom cost and usage budgets with alerts when thresholds are exceeded or forecasted to be exceeded.
- AWS Cost and Usage Report (CUR) provides the most comprehensive and detailed cost and usage data available.
- AWS Billing Conductor lets you create custom billing groups and pricing rules for showback and chargeback scenarios.
- Tags are key-value pairs you attach to resources to organize, track, and allocate costs by project, team, or environment.
Billing and Cost Management Tools
AWS Billing Dashboard
The AWS Billing Dashboard provides a high-level overview of your AWS spending. It shows:
- Month-to-date spend
- Forecasted end-of-month charges
- Top services by spend
- Free Tier usage tracking
AWS Cost Explorer
AWS Cost Explorer is a visualization tool for understanding and managing your AWS costs and usage over time.
| Feature | Description |
|---|---|
| Visualize | Graph costs by service, account, tag, Region, etc. |
| Filter & Group | Slice data by multiple dimensions |
| Forecast | Predict future spending based on historical trends |
| Savings Plans Recommendations | Suggest optimal Savings Plans based on your usage |
| RI Utilization | Track how well you are using your Reserved Instances |
| Granularity | Daily, monthly, or hourly (with cost and usage report) |
Use Cost Explorer when: You want to see WHERE your money is going, identify trends, or forecast future spending.
AWS Budgets
AWS Budgets lets you set custom budgets and receive alerts when costs or usage exceed (or are forecasted to exceed) your thresholds.
| Budget Type | What It Tracks |
|---|---|
| Cost Budget | Track actual spend against your budget |
| Usage Budget | Track usage of specific services (e.g., EC2 hours) |
| RI Utilization Budget | Alert if Reserved Instance utilization drops below threshold |
| Savings Plans Utilization Budget | Alert if Savings Plans utilization drops below threshold |
Alert actions:
- Send email notifications when thresholds are breached
- Send alerts to SNS topics for automation
- Auto-actions: Stop EC2 instances, apply SCPs, trigger Lambda functions
On the Exam: Use Budgets when you want to SET spending limits and GET alerts. Use Cost Explorer when you want to ANALYZE past spending.
AWS Cost and Usage Report (CUR)
The AWS Cost and Usage Report provides the most detailed cost and usage data available, broken down by hour, service, resource, and tags.
- Delivered to an S3 bucket in CSV format
- Can be analyzed with Athena, Redshift, or QuickSight
- Includes resource-level cost allocation
- Updated daily
Cost Allocation Tags
Tags are key-value pairs that you attach to AWS resources to categorize and track costs.
| Tag Type | Description | Example |
|---|---|---|
| AWS-generated tags | Automatically applied by AWS | aws:createdBy, aws:cloudformation:stack-name |
| User-defined tags | Created by you | Environment=Production, Team=Engineering, Project=WebApp |
How to use tags for cost management:
- Define a tagging strategy (e.g., Environment, Team, Project, CostCenter)
- Apply tags consistently to ALL resources
- Activate tags for cost allocation in the Billing console
- Use Cost Explorer to filter and group costs by tags
Additional Billing Tools
| Tool | Purpose |
|---|---|
| AWS Pricing Calculator | Estimate costs BEFORE deploying resources |
| AWS Compute Optimizer | Recommend right-sized resources based on utilization |
| AWS Billing Conductor | Create custom billing groups and pricing rules |
| AWS Application Cost Profiler | Track costs of shared AWS resources by tenant/application |
Consolidated Billing (AWS Organizations)
When you use AWS Organizations, all accounts share a single payment method through consolidated billing.
Benefits:
- Single bill — One bill for all accounts in the organization
- Volume discounts — Usage across all accounts is combined for tiered pricing (e.g., S3 volume discounts)
- Reserved Instance sharing — RIs and Savings Plans can be shared across accounts in the organization
- Simplified tracking — Track charges across all accounts in one place
Example: If Account A uses 3 TB of S3 and Account B uses 4 TB, they get the volume discount for 7 TB total, rather than each paying the higher per-GB rate for their individual usage.
Which AWS tool should you use to set a monthly spending limit and receive an email alert when your costs exceed 80% of the limit?
Which AWS tool provides the MOST detailed cost and usage data available?
A company has 5 AWS accounts in an AWS Organization. How does consolidated billing benefit them for S3 pricing?
What is the purpose of cost allocation tags in AWS?