This work reports the use of metallo tetra-amino phthalocyanines ( MTAPc, M = Co and Mn ) polymer thin films on gold and glassy carbon electrode surfaces for the detection and monitoring of hydrogen peroxide ( H₂O₂ ). The polymer-modified electrodes were characterized using electrochemical and microscopic-based methods. Atomic force microscopy (AFM) was used to study the bare and polymer-modified ITO surfaces. The electrocatalytic reduction of H₂O₂ with glassy carbon polymer-modified electrodes gave higher current densities compared to their gold counterparts. The electroanalytical properties of H₂O₂ were obtained using a real-time calibration curve of the amperometric determination in pH 7.4 aqueous solution. The limits of detection (LoD) of the polymer-modified electrodes towards electroreduction of H₂O₂ were of the order of 10^–7 M, with high sensitivity ranging from 6.0–15.4 mA.mM^-1.cm^-2.