Personal Server (on server OS) for Private Use

Hello community,

I have a question (that may be asked to death but i just want to be sure),

If i were to use, for instance, a Windows Server for personal use (as an overkill workstation), would i need to purchase a license to be able to remote into said Server, be it on the LAN or over the 'net?

Sorry if this is a resolved question, i just want to be crystal clear about this before i jumble up my account.

Thanks,

Techboy411