This study was commissioned by the Central Economic Council (CEC), and more particularly by the Special Advisory Commission ‘Construction’. It presents the sectoral results of a report that was produced in 2011 by the National Bank of Belgium and the Federal Planning Bureau. The federal government had asked both institutions to conduct a comprehensive study of a fiscal reform aiming at encouraging employment and supporting business competitiveness. As requested by the CEC, we comment here in detail the impact of a VAT increase without additional measures, on the one hand, and the impact of a VAT increase with transitional neutralization of the effect of that increase on the indexation. As regards the other measures examined, tables of results are annexed.