IAC stands for the International Association of Coaching. I used to be a Certifying Examiner for the IAC, and my BACC coach certification program prepares coaches for IAC certification. ICF stands for International Coach Federation. Both are well-respected independent coach certification bodies. The main difference between them are: 1) ICF certification is based on education completed and number of paid coaching hours 2) IAC certification is based solely on passing a series of exams. The IAC certification does not require completion of any particular training program or number of hours of coaching. ICF website www.coachfederation.org IAC website www.certifiedcoach.