A professor's salary can vary by education, school, subject taught and country. A professor typically earns a base salary and a range of benefits. In addition, a professor who undertakes additional roles in her institution (e.g., department chair, dean, head of graduate studies, etc.) earns additional income. In the United States, in 2014, a tenured Law professor made an average of $143,509 a year. By comparison, those teaching history, English, the Arts or Theology make about half that amount. But both are far above the median income for a person in the US.