RailCalc is a project commissioned by the Directorate-General for Transport and Energy (DG TREN) of the European Commission. RailCalc is aimed at developing a best practice guide to set and verify compliance of rail infrastructure charges with the rules of directive 2001/14/EC. Particular focus will be given to the estimation of charges and the calculation of mark-ups and the step-by-step harmonisation of the accounting practices in this domain. A close collaboration with rail infrastructure managers, national regulatory bodies and the EU Commission is expected. The study started in October 2006 and will be finished by March 2008.