Amazon CloudWatch Logs billing and cost
For detailed information about how to analyze your costs and usage for CloudWatch Logs and CloudWatch, and for best practices about how to reduce your costs, see CloudWatch billing and cost.
For more information about pricing, see Amazon CloudWatch Pricing
When you sign up for Amazon, you can get started with CloudWatch Logs for free using the Amazon Free Tier
Standard rates apply for logs stored by other services using CloudWatch Logs (for example, Amazon VPC flow logs and Lambda logs).