Using data on student satisfaction and teaching time in the UK, this paper examines how the proportion of teaching conducted by casual staff affected student satisfaction ratings for the 2014-15 academic year. It is found that an increased proportion of teaching delivered by casual staff leads to lower student satisfaction, even when controlling for university and faculty fixed effects. This may be a result of the features of casual contracts or might reflect the characteristics of individuals taking up such contracts. Regardless, it suggests that there is a trade-off between increasing casualisation and student satisfaction which could have implications for future student demand. As a result, policymakers should consider the long-term implications before offloading teaching to casual staff.