Webthe average certified occupational therapist assistant salary in the united states is $63,502 as of august 27, 2024, but the range typically falls between $57,303 and $70,258. Webthe average salary for an occupational therapy assistant is $50,653 per year, or $24 per hour in united states. Find out the average an salary by state, years of. “an occupational therapy assistant career won’t pay enough to get me where i want to go in life. ” truth: According to the bureau of labor statistics, those with at least an.