How do I add or remove seats?

Add or remove seats from Billing → Seats, with prorated charges and credits on your next invoice.

From Billing → Seats. Adding seats raises your limit immediately and prorates the cost onto your next invoice, so you only pay for the part of the period you actually use them. Removing seats posts a proration credit to your next invoice — first drop the members or pending invites you no longer need on the Team tab (we won’t let you reduce below the seats currently in use), then lower the count. Everyone already on your team keeps their access either way.