ABSTRACT - This article focuses on “the informalization of work” that is proliferating in all regions of the world. How and why has it come about? What are the effects? What are the implications for the labour movement? The article has three interconnected parts: first, I provide some explanations of concepts and terminology, especially to distinguish the process of “informalization of work” from the paradigm of the informal/formal sector, which may never have been an accurate way of viewing; second, three examples - China, South Korea, and South Africa - are given to ground more concretely this current informalization process; and finally I analyze strategies undertaken by labour to address the indisputable adverse consequences of this current phase of global capitalism.