In the EU's shift towards a green economy with the European Green Deal, the issue of justice and fairness has been a cornerstone. The severity and scope of the climate emergency calls for concerted international action. According to Horn and Sapir, for global climate cooperation to be conducive to impactful action “it is equally important that [climate policy] be perceived as fair in terms of the international distribution of costs and benefits that it entails”. Despite the EU’s clear track record in trying to solidarize global climate efforts its performance as a champion of climate justice is ambivalent,. There is a significant body of literature from political philosophy, moral philosophy, and climate ethics, identifying what we can consider fair in terms of the allocation of the costs and benefits of climate policy. This literature has by and large coalesced around two key principles of climate justice that have also normatively influenced the Paris Agreement: the Polluter Pays Principle, and the Ability to Pay Principle. However, there has so far been little to no research coherently assessing the EU’s policy practice against these principles. This research project intends to fill this gap by proposing a systematic assessment of three recent EU climate policies against the two principles of climate justice. The central question would be: to what extent does the European Green Deal align with the Polluter Pays Principle and the Ability to Pay Principle?