Some do, some choose not too. Some therapists do this, many do not. The patient should ask for a breakdown of any 'upfront charges'. If they are unhappy with them, then they should seek a therapist who does not charge up-front fees. Obviously an important consideration.
Charges vary, depending on locality, experience, and specialisation.
Other conditions besides IBS that can be treated with hypnosis. 1UD email All members of the IBS Register are independent practitioners and The IBS Register nor its owner or agents are liable in anyway for the actions or non actions of the chosen hypnotherapy practitioner.