7 Habits That Keep Your AWS Bill Small and Your Projects Running
Every builder remembers their first surprise AWS bill. You start a small project, forget one running server, and a week later you get an email with a number you did not expect. The good news is that this is easy to avoid. These seven habits will save you money and stress, whether you are building a hackathon project, a college app, or a startup idea.
1. Set a budget alert on day one
Before you create anything, open AWS Budgets and set a monthly budget, even a small one like $5. Add an email alert at 50% and 100%.
It takes two minutes. It is the cheapest insurance you will ever buy.
2. Use the Free Tier, but know its limits
The Free Tier is great, but it has limits. Some services are free only for a short time, and some are free only up to a set amount each month.
Open the Billing page every week. If something is close to its limit, you will see it early.
3. Choose serverless first
For most small projects, you don’t need a server that runs all day. Try this simple stack:
- AWS Lambda to run your code
- Amazon API Gateway to give your code a web address
- Amazon DynamoDB to store your data
- Amazon S3 to host files and your frontend
With serverless, you pay only when someone uses your app. If nobody visits at 3 AM, you pay almost nothing. That is a big win for early projects.
4. Always clean up after yourself
The biggest cause of surprise bills is things you forgot to turn off. Watch out for:
- EC2 instances left running
- Elastic IP addresses that are not attached to anything
- NAT Gateways (they cost money every hour, even when idle)
- Old EBS volumes and snapshots
- Databases you created “just to test”
After a project ends, make a short checklist and delete everything. AWS Cost Explorer will show you which service is costing the most.
5. Tag everything
A tag is a small label, like
project = hackathon. When you tag your resources, you can see which project costs how much, and you can find and delete everything for a finished project in one go.Start this habit early. It is hard to add later when you have fifty resources.
6. Use least-privilege permissions
When you are in a hurry, it is tempting to give a role full admin access. Don’t. If your keys leak, someone can use your account to mine crypto and run up a huge bill.
Give each Lambda function or user only the permissions it needs. Also, never put access keys in your code or push them to GitHub. Use IAM roles and AWS Secrets Manager instead.
7. Pick the right size, not the biggest size
Bigger is not always better. A small instance is often enough for a demo. You can always scale up later, and with Auto Scaling the system can do it for you when traffic grows.
Start small, measure, and then grow. This is how real teams work too.
A quick checklist
Before you close your laptop on a project, ask yourself:
- Do I have a budget alert?
- Is anything running that I don’t need?
- Are my resources tagged?
- Are my keys safe?
- Can I make this serverless?
If you can answer these five questions, you are ahead of many beginners.
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