  We evaluate the full next-to-leading order supersymmetric (SUSY) electroweak
and SUSY-QCD corrections to the on-shell two-body decays of the charged Higgs
bosons in the framework of the CP-conserving and CP-violating Next-to-Minimal
Supersymmetric extension of the Standard Model (NMSSM). Our corrections are
implemented in the code NMSSMCALCEW in order to compute the branching ratios of
the charged Higgs boson where we also take into account the state-of-the-art
QCD corrections already included in the code. We investigate the impact of the
NLO corrections for each decay mode in a wide range of the parameter space that
is allowed by the theoretical and experimental constraints. The new version of
NMSSMCALCEW is made publicly available.
