This article discusses the impact of the worldwide trend to introduce English as a foreign language (EFL) into primary schools at ever younger ages. This trend has gained momentum in recent years, affecting millions of children in countries throughout Asia. A policy decision of this kind has far-reaching implications but it is often made without consideration of the availability of human and material resources for its implementation. The result is that children may end up learning little or no English, frustrating the intentions of national governments to develop English proficiency amongst the wider population which is, in turn, supposed to contribute to economic development. Drawing on evidence from India and Thailand, this article questions the economic rationale for introducing English into primary schools and argues that decisions on the starting age at which to teach English should, instead, be considered from an educational perspective, taking into account system constraints.