Public-private partnerships are often depicted as an effective institutional arrangement to improve urban services towards sustainable development. In sub-Saharan Africa, the involvement of private parties in municipal solid waste management is believed to bring in technical, managerial and financial capabilities, which municipalities generally lack. However, several studies revealed that access to privatised waste collection services is often unequal and disfavouring unplanned settlements. This research contributes to an understanding of the production of such socio-spatial inequalities and injustices through public-private partnerships by specifically looking at the everyday collection practices of formal waste workers employed by Hysacam, the private company in charge of waste management services in the medium-sized city of Bafoussam and elsewhere in Cameroon. Drawing primarily upon qualitative data, including participant observation, the paper shows how the weight-based collection target, prescribed in the tripartite partnership contract between the central government, the municipality and Hysacam that theoretically should cover the whole urban area, produced perverse incentives at various scales for uneven garbage collection in Bafoussam. More generally, this case study points to the importance of considering workers and their everyday practices, as well as incentives and accountabilities, for the design of sustainable and socially just solid waste management.