This article describes how the measurement of the official Indonesian poverty figures has evolved since 1984, when Badan Pusat Statistik (BPS), Indonesia's central statistics agency, published its first poverty report. Since then, BPS has on several occasions revised the underlying methodology for how it calculates poverty. These changes have, in general, improved the way that poverty in Indonesia is measured, but they make it difficult to compare poverty figures over time. In fact, only poverty estimates (at the national and provincial level) since 2007 are based on the same methodological approach. This article presents the first detailed description of official poverty measurement in Indonesia since Booth's (1993) study, in English, and Sutanto and Avenzora's (1999) study, in Indonesian. It constitutes a unique repository for anybody who wants to understand the technical details of official poverty measurement in Indonesia.