A detailed technology assessment of chemical-looping combustion of solid fuel, i.e. coal, for a 1000 MWth power plant shows that the added CLC reactor costs as compared to a normal circulating fluidized bed boiler are small, because of the similarities of the technologies. Major costs are instead CO2 compression, needed in all CO2 capture technologies, and oxygen production. Molecular oxygen production may also be needed in certain CLC configuration for polishing the product gas from the fuel reactor.