This article synthesizes insights from deterrence theory and social psychology literature on retributive justice to develop and test a theoretical model which predicts how and why observers’ tax compliance intentions are influenced by knowledge of the punitive outcomes faced by individuals found guilty of tax fraud. We test our model experimentally on a sample of Canadian taxpayers and manipulate perceived responsibility for a fraud and whether a fraud perpetrator is punished. We show that observers’ tax compliance increases when a fraud (...) perpetrator is punished only when the perpetrator is perceived as blameworthy. The psychological process through which this positive influence operates is relatively complex, as it includes perceptions of punishment deservingness and affect. We also find that tax compliance decreases when a tax fraud perpetrator is unpunished, regardless of perceived blameworthiness. Our results are robust when we control for economic determinants known to influence fraud. The article concludes by discussing our findings’ implications for fraud research and policy. (shrink)