A method, system and computer-readable medium are disclosed for adjusting port usage and call duration in an interactive voice response (IVR) system based on changes in call volume. In one embodiment, the method comprises monitoring usage of one or more ports within an IVR system. A determination is made whether the usage of the ports exceeds a predetermined threshold for port usage. In response to determining port usage exceeds the predetermined threshold, the method adjusts one or more call flows within the IVR system to reduce call duration within the IVR system.