The legal age of girls for marriage has been a topic of debate in India. Although the legal age for marriage is now 18, there is continuous recommendation to raise it to 21. This research paper tests the requirement for this change from a legal, social, and economic standpoint. The purpose of the study of this topic is to inspect the legal basis governing the marriageable age, evaluate social effect on women’s empowerment, assess economic outcomes for individuals and society. The qualitative research approach is embraced, including legislative analysis, case studies, numeric data from government and international reports, personal laws of Hindus and Muslims. The finding reveals that increasing the legal marriage age notably improves women’s health, educational feat, and economic engagement. however, obstacles such as weak implementation and opposition of society must be handled.