Tensile creep data have been obtained for poly(vinyl chloride) at a number of temperatures ranging from 21.5 to 58 degrees C. The results were obtained from specimens of different age characterized by the elapsed time t(e) between quenching a sample from 85 degrees C to the test temperature and the start of the creep test. A model for interpreting non-linear creep data has been developed to describe the creep behaviour of the material as a function of both age and temperature. The results show that the effect of physical ageing is to progressively reduce the level of the relaxed beta compliance and to increase the mean retardation time of the glass-rubber alpha relaxation process. The effect of conducting creep tests on specimens of the same age at progressively higher temperatures is the opposite : the level of the relaxed beta compliance increases whilst the mean retardation times of the alpha process decrease. Neither the ageing rate nor the shape of the distribution of retardation times are affected by temperature.