Optimizing income tax revenue from individual taxpayers remains a primary objective of KPP Pratama Jakarta Cempaka Putih. To achieve this, an extensification strategy was adopted to expand the tax base and enhance taxpayer compliance. This research examines the implementation of the extensification strategy and identifies the driving and inhibiting factors influencing its effectiveness. Employing a qualitative approach, data were obtained through interviewa, field observations, and document analysis. The findings indicate that the strategy has been implemented through area mapping, the use of digital applications, and persuasive engagement with prospective taxpayers. While these measures have increased the number of registered taxpayers, the resulting revenue growth has been uneven. Key challenges include a limited number of officers, low public tax awareness, and insufficient ongoing education. Conversely, success has been facilitated by the supoort of a modern administrative system and collaboration with external institutions. The study essential to improving the effectiveness of tax extensification efforts.