When ordering a hosting plan you will be given 3 options:

1. Register a new domain.
2. Transfer your domain registration from another registrar.
3. I already have a domain I want to use or will register a new domain later.

Register a new domain.
You will want to choose this option if you are creating a brand new site on a brand new hosting account with us and you wish to register a new and previously unregistered domain name.

Transfer your domain registration from another registrar.
This option will result in transferring your domain registration from the current registrar. This transfer does not include copying your data, databases, or anything beyond the registration itself. We do not recommend transferring the domain when signing up for a hosting plan because during the transfer you will be unable to update the nameservers to point the domain at our services.

It is suggested that, if you wish to transfer the domain to us, that you do so after your data has been migrated to our service and you have updated your nameservers.

I already have a domain I want to use or will register a new domain later.
This is the option we suggest if you have a pre-existing site you wish to move over to us on your new hosting plan. You would enter the primary domain you wish to use on the account and once you've migrated your data or we've migrated it for you at your request - you can then initiate a domain transfer if you desire.

There is no obligation for you to transfer your domain to us in order to use our hosting services.
All that is necessary is the ability to modify the nameservers of the domain at the current registrar or the DNS zone to point the domain at us. Updating nameservers is a common and generally easy process but it can vary from registrar to registrar. If you have questions about updating your nameservers at a third party registrar it's best to direct those questions to them directly.