Fees for Nonstudents
https://catalog.utexas.edu/general-information/registration-tuition-and-fees/tuition-and-fees/fees-for-nonstudents/General Information
A fee of $20 a course is required of individuals not registered at the University who wish to audit one or more courses. In accordance with section 54.210 of the Texas Education Code, a person 65 years of age or older may audit a course without paying the fee if space is available. More information about auditing a course is given in Auditing a Course .