Environmental Impact Assessment (EIA) serves as a vital tool for policymakers and planners, facilitating informed decision-making to ensure sustainable development. By systematically evaluating the potential environmental consequences of proposed projects, EIA helps in identifying, predicting, and mitigating adverse effects on the environment. This process not only safeguards ecological integrity but also enhances social and economic outcomes by promoting responsible resource use and reducing environmental risks. The role of EIA in policy-making is multifaceted, encompassing legal frameworks, public participation, and inter-agency coordination. Policymakers utilize EIA to comply with environmental regulations, assess cumulative impacts, and integrate environmental considerations into development planning. For planners, EIA provides a structured approach to balance development needs with environmental protection, fostering resilience and sustainability in urban and rural projects. Despite its benefits, EIA faces challenges such as limited data availability, varying standards across regions, and inadequate public engagement. Addressing these challenges requires capacity building, harmonization of EIA practices, and leveraging technological advancements for more accurate assessments. As global environmental concerns intensify, the significance of EIA in guiding sustainable development becomes increasingly pronounced. This article explores the critical role of EIA in policy-making and planning, highlighting best practices, challenges, and future directions to enhance its effectiveness as a tool for achieving sustainable development goals.