CO2-Plume Geothermal (CPG) uses the benefit of CO2 as a geothermal working fluid to extract geothermal heat from naturally permeable reservoirs at ~2–5 km depth. Benefiting from increased mass flow due to its lower viscosity, utilization of CO2 doubles to triples the geothermal energy extraction compared to water. Furthermore, it improves the underlying CCS project: more CO2 can be permanently stored as heat is extracted from the reservoir. This project evaluates the Swiss CPG potential. A Cost-Ordered Cumulative Capacity Expansion curve will be delivered, incorporating a LCOE, Power and the overall CO2 storage potential for candidate reservoirs in Switzerland. The project dissemination benefits from an exchange with the University of Alberta and the University of Calgary. An identical Canadian CPG potential study will proposed to NSERC. The CPG-CH project will pave the way to produce secure, autarkic, and clean baseload power, independent of weather and other external factors, by providing a CPG ‘size of the prize’. Additionally, the deeper CCS potential is evaluated: a key step to meet the objectives of the Swiss Energy Transition 2050.