AWS Cost Optimization and Free Tier Keeping Your Node.js Deployment Affordable

AWS Cost Optimization and Free Tier

AWS can get expensive quickly if you're not careful. This guide covers how to keep costs low while running a Node.js application on EC2.

Understanding the AWS Free Tier

The free tier includes:

750 hours of t2.micro = enough to run one instance 24/7 (730 hours/month).

What's Not Free

• Elastic IPs Chargeable when not attached to a running instance (~$3.60/month)
• NAT Gateway $0.045/hour + $0.045/GB
• Load Balancer (ALB) $0.022/hour (~$16/month)
• EBS beyond 30 GB $0.08/GB/month for gp3
• Data transfer out First 100 GB/month free, then $0.09/GB

Tips to Minimize Costs

1. Use the Free Tier Wisely

• One t2.micro instance 24/7 is free for 12 months
• MongoDB Atlas free tier (512 MB) instead of RDS
• Vercel/Netlify free tier for frontend hosting
• Cloudflare free tier for DNS and CDN

2. Stop Instances When Not Needed

For development:

# Stop the instance when not coding
aws ec2 stop-instances --instance-ids i-xxxxx

# Start when needed
aws ec2 start-instances --instance-ids i-xxxxx

You don't pay for compute when stopped (only for EBS storage).

3. Use Spot Instances for Non-Critical Work

Spot instances use spare AWS capacity at up to 90% discount. Good for:

• CI/CD runners
• Batch processing
• Development and testing

Not suitable for: Production web servers (can be terminated with 2-minute warning).

4. Choose the Right Instance Type

Start small and upgrade when needed. Monitor CPU and memory to know when to scale.

5. Use Reserved Instances for Production

If you run 24/7, commit to 1 or 3 years:

• 1-year reserved 30-40% discount
• 3-year reserved 50-75% discount

Only do this for production instances that you know you'll need long-term.

6. Optimize Data Transfer

Data transfer OUT of AWS costs money. To minimize:

• Use CloudFront CDN for static assets (first 50 GB free)
• Keep frontend and backend in the same region
• Compress responses (Nginx gzip)
• Use WebSocket instead of polling (less data transfer)

7. Use MongoDB Atlas Free Tier

Instead of running MongoDB on EC2 or paying for RDS:

• MongoDB Atlas free tier: 512 MB storage
• Sufficient for development and small projects
• No maintenance, automatic backups

8. Set Up Billing Alerts

# Via AWS Console:
# Billing → Billing preferences → Receive Billing Alerts
# CloudWatch → Alarms → Create Alarm
# Set threshold (e.g., $10)
# Set notification (email)

This ensures you get notified before costs get out of hand.

9. Use Infrastructure as Code

Tools like Terraform or AWS CloudFormation help you:

• Track exactly what resources you're using
• Destroy all resources with one command when done
• Avoid orphaned resources (EBS volumes, Elastic IPs) that cost money

Sample Monthly Cost Breakdown

For a small DevTinder deployment:

After free tier expires:

The Takeaway

Keep AWS costs low by using the free tier (t2.micro 750 hours, MongoDB Atlas free tier, Vercel free tier), stopping instances when not in use, choosing the right instance type, using reserved instances for production, optimizing data transfer with CloudFront, and setting up billing alerts. A small DevTinder deployment can run for less than $1/month during the free tier and ~$11/month after.