A beginner-friendly guide to AWS Budgets, CloudWatch billing alarms and Free Tier alerts, so you never get a surprise AWS bill.

Almost every AWS beginner has the same fear: leaving something running and getting a bill at the end of the month that they didn't expect. The good news is that AWS gives you free tools to catch this early.

In this article, you'll set up two safety nets in about 15 minutes: an AWS Budget and a CloudWatch billing alarm, plus Free Tier usage alerts.

Why you need alerts from day one

A forgotten EC2 instance, NAT Gateway, load balancer or Elastic IP keeps costing money while you're not using it.

Practice projects are easy to forget after the tutorial ends.

Alerts tell you early, when the amount is still small and easy to fix.

AWS Budgets vs CloudWatch billing alarms

AWS Budgets CloudWatch billing alarm

What it tracks Cost or usage against a limit you set, including forecasted spend Total estimated charges so far this month

Where you set it Billing and Cost Management console…