The principle of equity plays an important role in the Global Stocktake under the Paris Agreement. This paper discusses several concepts of equity, which can guide the distribution of mitigation efforts, adaptation actions, and means of implementation and support, namely the concepts of responsibility, capabilities, egalitarianism and sufficientarianism. The application of one concept only may not be sufficient to ensure equitable and ambitious climate action. In all areas of climate action it is important to take into account individual capabilities and opportunities and to increase them. Support plays a critical role in enhancing and facilitating the use of available capabilities.