The EU Taxonomy is the first standardised and comprehensive classification system for sustainable economic activities. It covers activities responsible for up to 80 percent of EU greenhouse gas emissions and may play an important role in channelling investments into low-carbon technologies by helping investors to make informed decisions. However, especially in transition sectors much depends on the stringency of the technical performance thresholds that the Taxonomy applies to economic activities that are not yet “green”. This paper shows that for several sectors, the thresholds are not yet on track to support the transition towards climate neutrality. To this end, we analyse a large-scale public consultation with detailed responses to the specific thresholds from a variety of stakeholders. Two distinct use cases of the Taxonomy complicate the use of a single threshold for emission-intensive sectors: For new investments, criteria need to be stricter than for current activities of companies. We also argue that for the sectors not covered by the Taxonomy, there is a need to differentiate between low-emissions activities and high-emission activities that are incompatible with a low-carbon future.