Planning Center Calendar is priced by the number of rooms you need to manage. All packages include unlimited events, resources, and administrators.
There are no contracts or setup fees. After the first 30 days, you'll receive your first charge based on the pricing you choose.
Check out Planning Center Pricing for a general overview of all the products. From there, you can subscribe to Calendar. If you're already subscribed, change your current pricing plan on the Subscriptions Page.
If you try to add more rooms than your package allows, you will receive an error. Your Organization Administrator will then need to increase your pricing package or delete rooms.