The disadvantages of being Caliph are minor. Your character's Diplomacy and Piety count for your religion's Moral Authority; if your character is impious or antisocial, you may have a hard time converting provinces, and heretics will pop up more often. The Caliphate or Sheikhdom counts as a duchy title, discouraging you from holding two de jure duchies. If your diplomacy and intrigue are both very low, you may be at risk of becoming known as a [[Traits#Bad priests|Wicked Caliph]] [[File:Bad_priest_muslim.png]], which lowers moral authority. You also do not have access to the Give Sadaqah decision.
=== Creating a caliphate ===