According to Salary.com, radiation therapists earn a median salary of 74,406 to 112, plus. annually. The amount you earn largely depends on your years of experience in the field. In other words, the more experienced you become, the more salary increases you will get to compensate for your work. Radiation therapists work closely with cancer treatment teams that include radiation oncologists, cancer specialists, oncology nurses and professional dosimetrists trained to calculate radiation doses. Don't forget to update your resume with any new skills, accomplishments, or courses you take. 8. Continue your studies. Radiation therapists earn a salary above average. According to the U.S. Bureau of Labor Statistics (BLS), the median annual salary for radiation therapists was $82,790. This is a much higher salary than the median annual salary for all workers, which the BLS set at 45, for the same period, 11. Complete a bachelor's degree. The first step to becoming a radiation therapist is to obtain a Bachelor of Science (B.Sc.) degree. in radiotherapy. Entrance requirements for the program vary, but applicants are often required to have one or two years of pre-professional study at a postsecondary institution. On average, dosimetrists earn higher salaries than radiation therapists, at 25, per year. responsibilities included in the resumes of radiation therapists and dosimetrists, we found that the two professions have similar skill requirements, such as patients, patient care, and patient treatment.rdquo