The recent discovery of the Higgs boson at the LHC marked the completion of the Standard Model (SM) of strong and electroweak interactions. I will summarize the theoretical ingredients involved in the production and decay processes at the LHC that allowed and will allow for a quite concise picture of the properties of the discovered resonance. These theoretical calculations are a crucial contribution to the discrimination of the SM from BSM scenarios at the LHC. I’ll discuss the theoretical status of production cross sections and decay widths for MSSM Higgs bosons as an example of BSM Higgs bosons.