Each centre is different and ABA is not regulated in Ontario (yet!) but you can expect to pay roughly $55/hour for the Instructor Therapist, $75/hour for a Senior Therapist and $150/hour for the BCBA.  At Side by Side Therapy, we use a 10% supervision model. That means that for every 10 hours of therapy your child  will have 1 hour with either the Senior Therapist or the BCBA.