<p>The present study investigates the crystal structure, electrical transport, and magnetic properties of polycrystalline Bi₂Ir_2–<i>x</i>Cu_<i>x</i>O₇ pyrochlore samples in the 0.0 ≤ <i>x</i> ≤ 0.5 range. The results of the magnetic susceptibility measurements of Bi₂Ir_2–<i>x</i>Cu_<i>x</i>O₇ (<i>x</i> ≠ 0) indicate a notable divergence between the zero-field cooling (ZFC) and field cooling (FC) modes, which suggests the potential influence of magnetic frustration in the system. This behavior is consistent with previous reports on Bi₂Ir₂O₇, where small negative Curie–Weiss temperatures (<i>θ</i>) were observed. The effective magnetic moment in the Cu-doped samples decreases with increasing Cu content, which can be attributed to a rise in the Ir⁵⁺ species. Furthermore, the electrical resistivity of the system displays a metallic behavior, which is influenced by grain boundary effects and electron-electron scattering processes. These findings provide insight into the complex interplay between doping, magnetic behavior, and electronic transport in Bi₂Ir_2–<i>x</i>Cu_<i>x</i>O₇.</p> Graphical Abstract <p></p>