There is no additional charge for AWS CloudFormation. You pay for AWS resources (such as Amazon EC2 instances, Elastic Load Balancing load balancers, etc.) created using AWS CloudFormation in the same manner as if you created them manually.
In order to avoid having you sign up individually for all services supported by AWS CloudFormation, we automatically sign you up for all these services when you sign up for AWS CloudFormation. This makes it easy for you to use the AWS CloudFormation sample templates without having to manually check that you are enabled for the respective AWS services. As with all AWS services, you only pay for what you use, as you use it; there are no minimum fees and no required upfront commitments.