The mass of the discovered Higgs boson is one of its most precisely measured properties with an experimental accuracy at the sub-percent level. Besides its coupling behaviour, which conforms with the prediction of the Standard Model so far, the measured Higgs mass value can place strong constraints on extensions of the Standard Model, in particular supersymmetric ones. To fully exploit this experimental accuracy, a very precise prediction of the mass of the Standard Model-like Higgs boson in the respective model is required. In these proceedings, we comment on different methods to calculate the mass and present some recent developments in the effort of improving the predictions within the Minimal Supersymmetric Standard Model. In particular, we consider scenarios with heavy supersymmetric partner particles but relatively light Higgs bosons with and without CP-violation.