When the tanks with fluid are analysed conventionally, soil flexibility is not considered, and the tank base is assumed to be fixed. But, for practical analysis of tank resting on soil, the interaction between the tank, soil and foundation systems has to be considered. In the present study, the tank supported on the soil is studied considering the influence of soil. The tank, foundation and soil systems are discretized using finite element method. The tank is modelled using frame elements with two nodes, and foundation and soil are modelled using plane strain elements of four nodes. Pressure formulation approach is used to model the mutual influence between fluid and tank. The tank is subjected to two near-fault earthquakes. The analysis is used to investigate the effect of soil on the response of the tank. The various response parameters considered for the study are base shear, variation of fluid pressure on tank wall and displacement at top. Three soil types with different values of flexibility are considered in order to evaluate the effect of SSI. It is concluded from the analysis that the soil flexibility considerably influences the response of tank.