A sound financial system is a prerequisite for the inclusive and stable development of an economy, especially it plays a key role in dealing with the menace of inequality in income distribution. Economic policies including monetary and fiscal policy framed by the policymakers influence the accessibility to the financial resources by the poor. This study intends to examine the relationship between financial development and income inequality in India over the period 1973 to 2015. To analyze this relationship, the financial development index was constructed using the PCA approach. The study also checks the presence of the Greenwood–Jovanovich (GJ) hypothesis in the Indian economy. In this study, the ARDL Bound testing procedure is followed to assess the impact of financial development on income inequality. Besides financial development, the impact of economic development and government expenditure is also observed. Results confirm the existence of an inverted U-shaped linkage between financial development and income inequality in India, whereas economic development deteriorates the gap between the income of poor and rich. Furthermore, a U-shaped relationship between government expenditure and income inequality is revealed in this study. The findings of this study may provide new insight to the policymakers for framing suitable economic policies to encourage sustainable development in India.