In this contribution, we examine whether and why there is a gap in the use of formal childcare services between immigrant and native families across 21 European countries. We focus on three sets of potential determinants: (1) social class, education and labour market position; (2) immigrant-specific factors such as norms in the region of origin, citizenship acquisition and length of stay in the country of residence; and (3) contextual factors such structural constraints impeding access to childcare and traditional norms on motherhood in the region of origin. Drawing on data from the 2010 ad hoc module of the EU Labour Force Survey, we find evidence for an immigrant-native gap in formal childcare use. Adjusted for social class position, education and maternal employment, immigrant families are less likely to use childcare compared to native families across European countries. However, there are important cross-country differences in the size of this gap. The study also provides evidence for immigrant-specific explanations: acquiring citizenship and staying longer in the country of residence increases the probability to use childcare, while the strength of traditional norms in the region of origin reduces the probability to use childcare. Finally, we find that structural barriers to childcare use negatively affect childcare use for both native and immigrant families. Removing barriers to childcare use in terms of availability and affordability will benefit everyone.