Eco-labelled seafood is an important tool to promote sustainable development in fisheries. A price premium on eco-labelled seafood signals a return on investment in sustainable fishing methods, providing an incentive for fishers to adapt such methods. This paper addresses whether Swedish fishermen gain a price premium from participating in the MSC-certified Swedish Eastern Baltic cod fishery in the period 2011-2012. Using a detailed dataset of landing tickets and log books, we apply a quasi-experimental identification strategy to estimate the MSC price premium. The conclusion from the analysis is that we find no evidence of a price premium for MSC-certified landings for the fishermen involved in the fishery.