This study assesses the total factor productivity (TFP) growth for a sample of North-Rhine Westphalian dairy farms over the periods 2007-2014 and provides first-hand evidence of productivity growth of these farms before the milk market is liberalised. As first step a non-parametric Malmquist approach is therefore used to identify the productivity indices. The second step includes a panel regression to shed light on determinants of TFP growth. Expected results will show how TFP growth is influenced by their core components and which exogenous drivers affect the productivity growth.