This paper investigates the dynamic relationships between physical infrastructure, financial development and economic growth in the case of India, using the autoregressive distributed lag and the Toda-Yamamoto causality approach for the period 1980 to 2016. A physical infrastructure index and a financial development index are constructed using the principal component analysis. The empirical results suggest that physical infrastructure has a positive effect on economic growth both in the long run and short run, whereas financial development, although significant, has a weak impact on economic growth. The causality test supports a bidirectional causal relationship between infrastructure development and economic growth, while it finds unidirectional causation running from economic growth to financial development. As India is aiming for higher growth for a sustained period, our results suggest that there is a need for government intervention in expanding the physical infrastructure and this, in turn, could lead to economic growth as well as financial sector development.