The article presents a commercial investment analysis of the carbon capture project at the Karst gas processing plant in south-western Norway We update an earlier analysis and critically review the methods used including those applied for cost estimating. Our conclusion is that carbon capture and storage (CCS) at Karsto would be a very unprofitable climate measure with poor cost efficiency It would require more than USD 1 7 billion(1) in subsidies, or in excess of USD 133 million per year. That corresponds to a subsidy of roughly USD 0.1 per kWh on the power station's electricity output. The cost per tonne of carbon emissions abated is about USD 333. which is about 20 times the international carbon emission allowance price and many times higher than alternative domestic climate measures (C) 2010 Elsevier Ltd All rights reserved