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What is the AWS Free Tier and what types of free usage does it offer to new users? What are the essential steps for securely setting up a new AWS account for the first time? What is IAM Identity Center, and why is it recommended over creating individual IAM users for team access to an AWS account? What common mistakes do new AWS users make that lead to unexpectedly high bills, and how can they be avoided? How should a growing organization transition from a single AWS account setup to a proper multi account structure as their AWS usage matures? What advanced account security measures should a mature organization implement beyond the basic new account setup steps?
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How can AWS Budgets and billing alerts help a new user avoid unexpectedly exceeding Free Tier limits?

Intermediate

Answer

AWS Budgets lets you create a budget with a low threshold, such as one dollar, and configure an email or SNS notification the moment your account's actual or forecasted spending crosses that threshold, giving new users an early warning system that helps catch a misconfigured resource, such as an oversized EC2 instance left running accidentally, before it results in a significant unexpected bill.
aws budgets create-budget --account-id 123456789012 --budget '{"BudgetName":"FreeTierAlert","BudgetLimit":{"Amount":"1","Unit":"USD"},"TimeUnit":"MONTHLY","BudgetType":"COST"}'
Real-world example A new AWS user sets up a one dollar monthly budget alert and receives an email notification just two days into the month, discovering they had accidentally left a larger than expected EC2 instance running overnight, allowing them to shut it down before any significant charges accumulated.

Common follow-ups: How quickly do billing alerts typically trigger after exceeding a threshold?;What is the difference between an actual cost alert and a forecasted cost alert?

AWS Cost Management & Billing;Monitoring (CloudWatch)
All 7 AWS Free Tier & Account Setup questions