Abstract The interior effective single electron potential of an electron on the Fermi surface of an electron gas is obtained. This potential is calculated for points near the physical surface of the electron gas. The results are presented as modifications of a potential previously obtained by Loucks and Cutler. The present results include the effects of screened exchange and self-energy processes in which virtual surface as well as volume plasmons are emitted and reabsorbed. It is seen numerically that the results presented here produce surface potential curves which are not as smooth as those calculated by Loucks and Cutler. This is in agreement with recently calculated potentials by Davies.