The cost of becoming a Certified Personal Trainer (CPT) can vary depending on the certifying organization and any additional study materials or exams required. On average, the cost of obtaining a CPT certification can range from $400 to $800. Some organizations offer payment plans or discounts for students or military personnel, so it is worth exploring different options before making a decision. It is important to consider not only the initial certification cost but also any annual renewal fees or continuing education requirements that may be associated with maintaining the certification.