The relationship between culture and corruption has been the focus of various studies, producing inconsistent results. We suggest that these inconsistencies might be due to the conceptualization and measurement of culture. Drawing on the possible value/fact dichotomy discussed in ethical philosophy, we introduce the construct of cultural discrepancy—the difference between cultural values (“ought”) and practices (“is”)—as a predictor of pervasive (i.e., fully institutionalized and predictable) and arbitrary (i.e., uncertain and relatively unorganized) corruption. Examining the relationship between the discrepancies observed in the GLOBE cultural dimensions and the Corruption Perception Index shows that in-group collectivism discrepancy is negatively related to pervasive corruption; future orientation discrepancy is positively related to arbitrary corruption. Further, we show that these relationships are contingent on national wealth. The negative relationship for in-group collectivism discrepancy is most pronounced in poor and moderately wealthy countries, and the positive relationship for future orientation discrepancy is most pronounced in rich countries.