guest vs Team Member

[Chris Stuckey]

I'm new to Trello and do not understand the difference between Guest and Team Member.  When I invite someone to a Board does that mean my account charge increases?  I bought a Business Account and want to try and share it with another co-worker to allow them to work with it as well. 

[Callum Carlile _Automation Consultants_]

Hi @Chris Stuckey 

The accepted answer on this similar community question should also answer yours, as well as this Trello document which fully explains what constitutes a billable member