This study explores implicit expectations held by parties to the casual employment contract in a New Zealand context. Casual work arrangements have been on the rise in New Zealand over the last 30 years. Given the increased use of casual contracts over this relatively recent period, it begs the question as to what each party expects from the arrangement. Casual contracts do not explicitly address questions of work regularity, employment duration, or future prospects. It can therefore be inferred that any expectations of these nature are held implicitly. Extant literature on psychological contract theory lays a groundwork to understand these expectations, however there is sparse coverage of how expectations materialise for casual employment parties. To address this gap in the literature, a qualitative study was undertaken to interview employees and employers engaged in casual employment. Participants were drawn from a variety of industries where casual employment is common. Thematic analysis of interview data found two distinct categories of findings. The first category describes the content of implicit expectations as they pertain to unique qualities of casual employment. The expectation categories were composed of reasonable notification, work environment, future, and continuity expectations. The second category of findings explored factors which influence expectation content. From those findings, this thesis argues an implied bargaining model. The implied bargaining model builds on extant literature by identifying expectations unique to casual employment, suggesting a casual employee typology, and exploring trade-offs present in the formation of psychological contracts. Further, practical learning from this study can contribute to stronger employer/employee relationships and help provide a framework for better fit between both parties.