This article presents data collected in a year‐long study in which the author and his assistants kept detailed records of their time spent teaching and maintaining two comparable university courses. One course was offered online to adult professionals away from campus, the other offered to undergraduates in traditional classrooms on campus. The courses had similar learning objectives, similar student activities, and equally favorable ratings by students. Both were mature courses that required only routine maintenance and revision. The data do not support the widely held belief that teaching an asynchronous online course requires more effort than teaching a comparable synchronous classroom course. Although the distance course required more frequent attention, the total teaching and maintenance time spent per student was less than that required to teach and maintain the classroom course. Categories of teaching tasks are also compared.