A discount rate is based on different aspects and differs across regions, economic sectors, investment projects, and decision makers. The choice of a discount rate requires a fundamental analysis and argumentation, in order to avoid an under- or overestimation of investment projects. Having conducted a farm-level experiment in North-Rhine Westphalia (NRW, Germany), we estimated the current discount rates in German agriculture, as well as quantify the effects of different factors on discount rate.