Digitalisation’s material and immaterial costs should be better accounted for. Modular product design, repairability, transparent supply chains and the use of public and free-source code play a decisive role in making hardware and software sustainable. This article outlines the basic approaches for the design of sustainable hardware and software and illustrates the political options. The article was initially published in Special Issue Vol. 36/O1 of the journal OekologischesWirtschaften (Ecological Economy) and edited slightly for this magazine.