Honest behavior of public sector workers is an important quality of governance, impacting the functioning of government institutions, the level of corruption, economic development and public trust. Scholars often assume that honesty is inherent to public sector culture, however empirical evidence on the causal effect of public sector culture on honest behavior is lacking. This research addresses this question by estimating the causal effect of priming public sector identity on the honest behavior of public employees. We validated an instrument for priming public sector identity and employed it in five preregistered incentivized experiments among civil servants in Germany, Israel, Italy, Sweden, and the UK (N = 2,827). We find no evidence for the effect of public sector culture on honest behavior in both individual (four studies) and collaborative (one study) tasks. The theoretical implications of these results for the study of moral behavior in the public sector are discussed.