Question
Are agent and admin roles priced differently?
Answer
No, there is no difference in cost between agents and admins in Zendesk.
Increasing or decreasing agent seats allows the account owner to add seats that can be set as agent or admin roles. For steps on updating the agent seats, see the article: Viewing and managing plan subscriptions.
For more information on the differences between the roles, see the article: Understanding Zendesk Support user roles.
Note: On Enterprise, you can customize agent seats through custom roles.