Most of literatures regarding early warning system focus on the effectiveness of differentiating insolvent insurers from solvent insurers. However, no insolvent property liability insurers exist in Taiwan, and thus, no comparable tests can be done. The purpose of this paper is to use dynamic financial analysis to simulate the policyholder surplus for 14 domestic property-liability insurance companies. We argue that the existence of early warning system is meant to efficiently allocate regulation resources. The information generated from simulation enables us to prioritize insurers, under various presumptions, that should receive further regulation scrutiny.