In banks decisions are made in a speedy and complex environment often with huge uncertainty. This risk must be managed proactively on an enterprise level. To accomplish this task, a systemic view of the bank is essential. Up to now there is no standardised approach for analysing the overall risk dynamics of a bank that is capable of describing the forces inherent in risk management. Most risk models are constrained by their static view, so that they hardly capture the rapid and discontinuous changes. This paper examines the dynamics by applying system dynamics to enterprisk risk management, with the aim of understanding the banks’ risk dynamics. In order to simulate the risk dynamics of a universal bank a dynamical enterprise risk model was developed. By combining the disciplines of enterprise risk management and system dynamics, this paper shows how a systemic view can improve structures in bank risk management and the need for large system thinking.