Apparatuses, systems and methods associated with substrate design with a magnetic feature for fully integrated voltage regulator are disclosed herein. In embodiments, a substrate assembly may include a base substrate and one or more interconnect elements located at a first side of the base substrate, the one or more interconnect elements to be coupled to a semiconductor chip having an integrated voltage regulator (IVR). The substrate assembly may further include a magnetic feature located at a second side of the base substrate, the second side being opposite to the first side, wherein the magnetic feature extends along a portion of the second side of the base substrate that is opposite to where the IVR is to be located when the semiconductor chip is coupled to the one or more interconnect elements. Other embodiments may be described and/or claimed.