Abstract We study the scenario of inflection point inflation where a flat direction of the minimal supersymmetric standard model (MSSM) is identified with the inflaton. Specifically, we consider in full generality the cases where an MSSM flat direction is lifted by a higher-dimensional superpotential whose dimension is $n=4,5,6,7,9$. We confront the inflection point inflation scenarios with various n with the Planck and BICEP data, and thereby constrain the soft supersymmetry breaking mass and the coefficient of the higher-dimensional operator that lifts the flat direction.