amazon web services -ebs snapshot - s3

I'm newbie in the cloud computing world.

I have a question about the backups. When we take an EBS snapshot is stored in amazon s3 ($0.095 per GB according the site).

For use this I need to contract amazon s3 service (with 500gb for example) in addition de ec2 and ebs or this automatically charged when I take a snapshot?

that's all. Bye.