This study examines installment-based sale and purchase practices as an alternative to the traditional pagang gadai system in Nagari Koto Tangah from the perspective of maqashid al-shari‘ah. The study is motivated by problems associated with pagang gadai, including unclear redemption periods, the use of rice field yields by lenders without clearly defined rights, and the potential for injustice and practices resembling riba. This research employs a qualitative field study with descriptive analysis. Data were collected through interviews, observations, and documentation involving transaction participants, community leaders, and religious figures. The findings indicate that installment-based transactions are conducted through mutual agreements concerning the rice fields, purchase prices, and payment periods, with written contracts witnessed by community members. From the perspective of maqashid al-shari‘ah, this practice promotes public welfare (maslahah) by providing greater legal certainty, protecting the rights of the parties, and reducing the potential for injustice and riba. The study concludes that installment-based sale and purchase can serve as a more transparent and equitable alternative to pagang gadai, provided that the transaction fulfills the requirements of Islamic commercial law and safeguards the interests of all parties. Academically, this research contributes to the study of Islamic Economic Law by demonstrating how the principles of maqashid al-shari‘ah can inform the evaluation of traditional land-based financing practices and the development of fairer contractual arrangements in local communities.