AWS Billing and Cost Management is the service that you use to pay your AWS bill, monitor your usage, and analyze and control your costs. AWS automatically charges the credit card that you provided when you signed up for a new account with AWS. Charges appear on your monthly credit card bill. You can view or update your credit card
https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/awsaccountbilling-aboutv2.pdf

