ABSTRACT This study presents dynamic electrochemical impedance spectroscopy (DEIS) as a tool for online impedance monitoring of electrophoretic deposition of a cataphoretic coating. The process was examined via the acquisition of instantaneous impedance spectra during sample polarization from their corrosion potential to the selected potential values corresponding to various stages of the cataphoresis. The conducted experiments allowed calculation of the instantaneous parameters of the process during its duration and distinguishing subtle changes in their evolution, which provided the information about advance of the deposition. Thanks to the application of the DEIS method, it was discovered that the majority of electropaint was deposited at a certain narrow potential span at the beginning of the polarization range. The DEIS approach may be widely applicable in research on the mechanism, kinetics, and optimization of the electrophoretic coating deposition processes.