Average Salary for an Occupational Therapy Assistant Occupational Therapy Assistants in America make an average salary of $50,994 per year or $25 per hour.While it's true that you won't get the typical perks of full-time employees, temporary staffers can usually expect PRN employees have access to a unique set of personal and professional benefits.Free, fast and easy way find a job of 1.423.000+ postings in Dallas, TX and other big cities in USA. Full-time, temporary, and part-time jobs. Search and apply for the latest Occupational therapist assistant prn jobs in Dallas, TX.