While countries that receive refugees have certain legal obligations to assist and protect them, the legal duties of other States to step in and help relieve this burden is less clear. Despite multiple proposals, a mechanism to systematically, equitably and predictably allocate responsibilities between States at a global level has still not been agreed. The UN's High-Level Summit on Addressing Large Movements of Refugees on 19 September 2016 held some promise in this regard, but the resulting New York Declaration was more muted than earlier drafts. This article seeks to provide a unique insight into the meaning of responsibility-sharing and international cooperation from the perspective of individual States. It does so by examining statements they have made at various UN fora over the past decade. It focuses on the two main methods of sharing responsibilities, namely the provision of financial and other assistance to host countries, and the admission of refugees. It then considers the extent to which States perceive responsibility-sharing to be a legal obligation, as opposed to a voluntary undertaking, and analyses this in light of expert opinion. Finally, it discusses the principle of common but differentiated responsibilities, a concept drawn from international environmental law, and considers whether and how it might apply in the international refugee law context.