If your AWS bill suddenly went up, CloudWatch is often one of the hidden reasons. Many people only check services like EC2 or data transfer, but CloudWatch quietly grows in the background.
If your full bill increased, check why your AWS bill increased.
Simple explanation: CloudWatch costs increase when more logs, metrics, or monitoring data are created than before.
Last month: £20
This month: £110
Result: More logs → higher CloudWatch cost
Recommendations:
CloudWatch runs in the background, so it’s easy to ignore until costs rise.
See exactly what changed in your AWS billCloudWatch becomes expensive when large amounts of logs are ingested, stored for too long, or when too many metrics are collected frequently.
The main cost driver is usually CloudWatch Logs, especially log ingestion and storage from services like Lambda and EC2.
You can reduce costs by setting log retention, removing debug logging, and deleting unused log groups.
Yes, usually after a deployment, traffic spike, or bug that causes more logs or metrics to be generated.
AWS offers a small free tier, but costs increase quickly once usage grows beyond that.