There is no additional charge for AWS CodeStar. You only pay for AWS resources (e.g. Amazon EC2 instances, AWS Lambda executions, Amazon Elastic Block Store volumes, or Amazon S3 buckets) that you provision in your CodeStar projects. You only pay for what you use, as you use it; there are no minimum fees and no upfront commitments.
New AWS customers who are eligible for the AWS Free Tier can launch an application in AWS CodeStar and not incur any charges for a low traffic application that stays within the free tier limits. If these applications require more resources than the free tier provides, customers will be charged the normal AWS rates for the incremental resources the application consumes.