AWS GovCloud (US) Billing and Payment
All AWS GovCloud (US) activity, usage, and payments are managed through a standard AWS account. When you sign up for AWS GovCloud (US), your AWS GovCloud (US) account is associated with your standard AWS account. You can associate only one AWS GovCloud (US) account to one standard AWS account. If you require multiple AWS GovCloud (US) accounts, you must create a standard AWS account for each AWS GovCloud (US) account. For more information about Billing and Cost Management, see the AWS Billing and Cost Management documentation .
To view account activity and usage reports for the AWS GovCloud (US) account, you must sign in to the standard AWS account (using credentials from that account). You cannot view usage and activity from the AWS Management Console for the AWS GovCloud (US) Region.
If you use AWS services in other AWS Regions with the standard AWS account, your account activity and usage reports are combined. If you want to separate billing and usage between the two accounts, create a new standard AWS account that you use only to associate with your AWS GovCloud (US) account.
The following diagram outlines the relationship between AWS GovCloud (US) and standard AWS accounts:

AWS GovCloud (US) account relationship to standard AWS account