If I am sharing project information does the other person need to be on Premium too?

[Nikki]

I have a premium subscription, if I am working with someone in a workspace do they need to be on a premium subscription too to use all the extra functions?

[Luciana Munhoz]

Hi Nikki! Welcome to the community!

Trello's Premium tier is an upgrade for a single Workspace. So the people you invite to a board will also be able to use the Premium features of that Workspace for the boards they're a member of. So they won't need a subscription if they are invited to your Premium Workspace (although this can incur additional charges to your Workspace).

You can check more about Premium here: https://support.atlassian.com/trello/docs/trello-premium-user-guide/

and to check How billing works and charges: https://support.atlassian.com/trello/docs/how-billing-works-with-trello-premium-and-standard/