Same money, different impact? The curving effect of European Structural and Investment Funds on EU support in Spain (1990–2019)

European Structural and Investment Funds (ESIF) engender European Union (EU) support in generating economic growth, but their effect is conditional on individual European identity and educational background. This study investigates whether the positive impact of ESIF spending on EU attitudes also depends on the alignment of funding with the economic needs of recipient regions. We examine this issue with the Spanish case (1990–2019), employing a unique combined data set of Eurobarometer waves and regional NUTS-2 economic indicators. Our findings indicate that EU funds manage to decrease Euroscepticism only in laggard regions, which receive the lion's share of funds and allocate them to public goods easily perceived and communicated to the local population. Conversely, the effect of ESIF on transforming attitudes is absent in middle and high-income regions. The findings suggest a more complicated relationship between ESIF and EU support, which necessitates taking both individual and contextual factors into account.