The reliability-based design (RBD) of shallow foundations under drained compression loading is examined for the ultimate limit state (ULS) condition. This ULS is defined as that in which the drained compression capacity is equal to the ultimate applied load. The uncertainties in both the load and the capacity are considered. A Monte Carlo simulation-based parametric study indicates that the most influential parameters on the reliability index are the statistics of the effective stress friction angle and the ratio of the 50-year snow load to total load, where snow is present. The results of the parametric study are used to select the appropriate domains for the calibration of the simplified RBD equations. These equations are presented in a form that can be applied readily in foundation engineering practice.