By the end of 2008, the Federal Planning Bureau published the Working Paper 21-08. This Working Paper described and analysed the impact of the EU Climate-Energy Package on the Belgian energy system and economy. Since then, however, a lot has changed: the macroeconomic projections altered radically further to the financial and economic crisis, recent developments in the field of oil and gas supply and demand made fossil fuel price projections to be revised upwards and a number of energy efficiency measures were agreed upon and put into law in the course of 2008 and 2009. All this made the 2008 study less relevant whilst only 2 years old. This study report then updates the analysis reported in the Working Paper 21-08 and dedicates special attention to the stepping up to -30% for the EU greenhouse gas reduction target. It is based on the new economic and policy context and benefits from recent analyses of the European Commission conducted at EU level.