Automatised NLO matching between two scalar sectors

Null results in searches for new physics at the LHC support the possibility that a large separation between the scale of new physics and the electroweak scale exists. Nevertheless, there are still observables in this scenario, in particular the Higgs mass, that are sensitive to the properties of theories beyond the Standard Model. In order to obtain reliable predictions for a model that involves very heavy degrees of freedom, the precise matching to an effective theory is necessary. I present an extension of the Mathematica package SARAH which is able to perform the matching of the scalar sector between two renormalizable gauge theories at the full one-loop level. In addition to comparisons with known results that concern a Standard Model effective theory, I discuss the matching of a singlet extended Minimal Supersymmetric Standard Model onto a low energy theory with an extended scalar and fermion sector.