A theory for the photoinduced discharge characteristics of xerographic photoreceptors with bulk carrier generation is developed. In the case of flash exposure, analytic solutions for the surface potential as a function of time after exposure are obtained for two special cases: (i) small-signal case and (ii) uniform initial charge distribution at any signal level. The more general case, i.e., the initial charge distribution is an exponential function, is solved by a numerical iterative method. The accuracy of this method is tested by comparison with the analytic solutions for the special cases. The effect of bulk generation of carriers is to speed up the discharge especially at the early stage, by partially lifting the space-charge limitation. The optimum conditions, however, depend on the field dependence ω of the mobilities, the ratio β of the electron to the hole mobilities, and the optical density of the photoreceptor αL. The surface potential after exposure as a function of these parameters is computed numerically for the most common values of 0≤ω≤2, 0.1≤β≤1, and αL≥1, and the results are discussed.