AWS provides Cost Allocation Tags to track costs of instances so you can separately track costs in different Stacks / Environments – e.g. Development and Production

https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/cost-alloc-tags.html

See also here on Activating these Tags: https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/activate-built-in-tags.html