The standard of living for the area, subject, education level of the tutor, local demand, travel costs, preparation materials and time of the semester affect the cost of tutoring per hour. Some tutors also factor in marketing expenses to determine an hourly rate.
Subjects that require a high level of expertise, such as physics and chemistry, cost more than general knowledge subjects, such as reading comprehension. Tutoring for standardized tests also has a higher average hourly rate. Some tutors charge students more for on-call sessions instead of sessions that follow a regular weekly schedule. Cancellation fees also increase the price of tutoring.