If you register your domain through Yahoo! and you haven't transferred your domain away from Yahoo!, then the registration and renewal fees are included with your annual or monthly service fees.

If you are using a domain name previously registered through another provider, the domain registration/renewal fees are not included in your service. In this case, you will be invoiced directly by your original registrar. Please contact your registrar if you have any question regarding the registration or renewal fees for your domain name.