As a personal trainer, my rate goes by a sliding scale of $75/hour. My clientele is wealthy and highly educated. As a kinesiotherapist, gerokinesiologist, exercise physiologist, and personal trainer, I also hold various certifications and have a 20+ year background in classical ballet. I have a given rate with institutions hiring me, such as a fitness center and a retirement residence, but wonder what to charge a company with 450 tenants wishing to offer fitness classes as an additional service to its tenants.
All great answers, especially Joanne’s. Charge what you think is fair and what you determine that your time is worth. The greater the number of students, the lower the per student cost. I like Jabez’s suggestion of an intro class to show your prospective clients the value of your instruction.