Taxation has been an integral part of the socio-economic fabric of the Indo-Pacific region for millennia, serving as a means to fund governance, finance infrastructure, and redistribute wealth. This paper traces the evolution of taxation practices in the Indo-Pacific from ancient times to the contemporary era, focusing on the transition to the modern Goods and Services Tax (GST) regime. Through a historical analysis and a critical examination of taxation models, this paper explores the diverse approaches to the process of taxation employed by various societies and governments across the region during the successive regimes. Additionally, it investigates the implementation, impact, and challenges of the GST system in Indo-Pacific countries. By way of investigating the historical trajectory and contemporary dynamics of taxation, this study aims to provide insights into the role of taxation as a significant tool in shaping the economic landscape of the Indo-Pacific region. This paper will be helpful for policymakers and practitioners who can make informed decisions towards fostering sustainable development and equitable growth in the Indo-Pacific.