PurposeThere is growing scholarly interest in the use of penalty in employment contracts which reduce employees' pay if the employee's performance does not meet a pre-specified performance threshold. Prior accounting research has focused exclusively on the effect of penalty on employee performance. In this study, the authors extend earlier research by examining how penalty affects the employers' wage offers. Prior research suggests that employers' generous wage offers in employment contracts are normally translated as trust by employees who in turn reciprocate with higher effort. The authors present a theory that predicts penalty reduces employers' wage offers. Then, the authors propose unrestricted communication between employers and employees as a potential moderator for the negative effect of penalty on trust and reciprocity.Design/methodology/approachThe authors implement a controlled lab experiment with a 2 × 3 experimental design (Penalty: Present and Absent; and Communication: None, One-Way and Two-Way).FindingsThe authors develop their predictions by utilizing insights from motivational-crowding and organizational communication theories. The authors hypothesize and find evidence that employers' ability to penalize employees can reduce employers' motivation to offer generous wages. As a result, reduced trust demotivates employees to provide high effort. However, the authors find that a two-way communication moderates the negative effect of penalties by restoring trust, thereby, increasing reciprocity. Finally, the authors find evidence that relationship-oriented messages explain the moderating effect of communication.Research limitations/implicationsThis study is subject to limitations inherent in all experimental studies. The decisions in the study experiment are less complex than those found in practice. Moreover, there are significantly higher costs and potential benefits to shirk on effort in practice. The authors encourage future research on other organizational features that would influence the generalizability of their theory and results. Nonetheless, this study makes an important contribution to the literature on trust, reciprocity, gift-exchange contracts, managerial controls and communication.Practical implicationsThis paper has several important implications for theory and practice. The authors show that the presence of penalty may not automatically result in increasing employees' effort level, contrary to traditional economic theory predictions. This effect is driven mainly by the crowding out effect of a penalty on employers' desire to signal trust. Therefore, the presence of an open communication channel may become an important tool to reverse the psychological effect of reduced trust when penalty is present. Therefore, the study's findings contribute to the trust–reciprocity literature on how management control system influences employers' and employees' behavior. These findings are especially germane given the trend in the workplace toward establishing open communication at different levels within the firm hierarchy. The study also contributes to the literature on trust–reciprocity as critical informal controls and social norms in accounting practices (Bicchieri, 2006; Stevens, 2019), shedding light on how firms may influence employees' reciprocity in management control practices and induce them to act in line with the firm's objectives by opening communication channels.Originality/valuePrior accounting research document that penalty in employment contracts increases employee performance due to loss aversion. The study, however, demonstrates that the positive effect of penalty is not sustained in a gift-exchange contract. Specifically, the study's experimental results provide evidence that the availability of penalties can psychologically change the way employers perceive their decisions on offering generous wages (i.e. trust) and consequently reduce employees' reciprocation of high effort levels. Yet, the authors propose a two-way communication as a restorative mechanism for the lost trust. Implications for theory and practice are discussed.