This paper provides a detailed analysis of the capital structure strategies employed by the Tata Group during the period 2020–2025, focusing on three principal listed entities: Tata Consultancy Services (TCS), Tata Motors Limited (TML), and Tata Steel Limited (TSL). The methodology utilizes a comparative case study approach combined with trend analysis of key financial ratios, including Debt-to-Equity (D/E), Interest Coverage Ratio (ICR), and Return on Capital Employed (ROCE). The investigation confirms that the conglomerate employs a hybrid, segmented financing model that aligns different divisions with distinct corporate finance theories. Key findings indicate that TCS operates predominantly within a pure Pecking Order Theory (POT) framework, utilizing recurrent, large-scale share buybacks to return massive internal cash surpluses and indirectly function as the central liquidity provider for group ventures. Conversely, TML and TSL adhere closely to a dynamic Static Trade-off Theory (STOT), prioritizing aggressive deleveraging (exemplified by TML’s ‘zero net debt’ target) to build debt capacity necessary for massive, transformative capital expenditure in electric vehicles and green steel. Furthermore, the study identifies a crucial governance shift, wherein Tata Sons, the holding company, mandates financial autonomy for subsidiaries. Finally, the group has strategically integrated Sustainable Finance, pioneering instruments like Sustainability-Linked Bonds (SLBs) and leveraging Green Climate Fund (GCF) grants to diversify funding sources, lower the long-term Weighted Average Cost of Capital (WACC), and support India's sustainability goals.