Revenue Diversification and Growth Dynamics: A Comparative Study of Selected IT Companies in India

The empirical analysis examines whether sectoral revenue diversification, measured using the Herfindahl–Hirschman Index (HHI), influences growth performance for Tata Consultancy Services and Infosys over the period 2021–2025. The results reveal clear differences in diversification structures. TCS exhibits relatively higher HHI values (0.225–0.238), indicating a more concentrated revenue profile, whereas Infosys maintains lower HHI levels (0.204–0.209), reflecting a more diversified sectoral distribution. Despite these structural differences, both firms display comparable growth trajectories, with strong growth in the initial years followed by moderation in later periods. The statistical analysis provides no evidence of a meaningful relationship between diversification and growth. The correlation coefficient (r = 0.02) indicates an almost negligible association between HHI and revenue growth. This finding is reinforced by regression results, where the coefficient of HHI is statistically insignificant (p = 0.969) and the model explains virtually none of the variation in growth (R² ≈ 0.0003). Accordingly, the null hypothesis of no relationship between diversification and growth cannot be rejected. These findings suggest that sectoral revenue diversification does not serve as a primary driver of growth in the Indian IT sector. Instead, growth performance appears to be influenced by firm-specific and market-driven factors such as demand conditions, technological capabilities, and client acquisition strategies. The evidence also indicates a trade-off between stability and flexibility: a relatively concentrated structure, as observed in TCS, is associated with stable growth, while a more diversified structure, as in Infosys, corresponds with greater variability but not necessarily superior performance. From a managerial perspective, the results imply that diversification should be approached as a risk management strategy rather than a growth-maximizing tool. Firms should focus on strategic allocation of resources toward high-demand sectors while maintaining operational efficiency and core competencies. However, the findings should be interpreted with caution due to the limited sample size and short time horizon. Future research may extend this analysis by incorporating a larger set of firms, longer time periods, and additional performance variables to better capture the diversification–performance dynamics.

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