This document summarizes a global literature review on sanitation tariffs in developing countries. It outlines the author's approach, key questions, and divisions within the literature. The literature trend shows a focus on partnerships and subsidies that often ignores sanitation specifically. There are also gaps around understanding tariffs from a user perspective, relationships with local governments, and tariffs for emptying pits/septic tanks. Overall, the literature provides less understanding of the sanitation market and financing. This research aims to help fill some of those gaps.