The present work aims to derive the macroscopic response of elasto-plastic composites materials using the Incremental Micromechanics Scheme (IMS).Such mean-field scheme is coupled with the well-known incremental formulation that characterizes the return mapping algorithm in the computation of the instantaneous tangent effective modulus.To this end, the J2 elasto-plasticity is carried out in its 3-dimensional version where the "consistent" modulus calg of each phase is computed from works of Doghri and Ouaar [1].