This study discusses the effectiveness of green financing in supporting SDGs with specific reference to banks in India. As a mixed-method approach, the key data were collected among 420 respondents (402 useful replies), including bank managers, credit officers, sustainability officers and customers. Data indicate that awareness of green financing instruments is high but adoption patterns vary widely in both banking sectors. It was demonstrated that public banks lead in the development of green loans that provide inclusivity, while private banks lead in green bonds and products of supportable speculation based on conservational sustainability. The regression results indicated that green loans had the most significant and sustainable investment. All these positive trends notwithstanding, multiple challenges, including the absence of awareness, resource limitations, and threats of green washing, remain. The findings point to the complementary role of both banks in bridging the sustainability financing gap, and also point to the importance of regulatory support, capacity building, and innovation. The study underwrites to nonfiction on the upscaling of green financing in order to meet the 2030 SDG agenda.