  We conduct a numerical study over the constrained MSSM (CMSSM), Next-to-MSSM
(NMSSM) and $U(1)$ extended MSSM (UMSSM) to probe the allowed mass ranges of
the charged Higgs boson and its dominant decay patterns, which might come into
prominence in near future collider experiments. {We present results obtained
from a limited scan for CMSSM} as a basis and compare its predictions with the
extended models. We observe within our data that a wide mass range is allowed
as $0.5(1) \lesssim m_{H^{\pm}} \lesssim 17$ TeV in UMSSM (NMSSM). We find that
the dominant decay channel is mostly $H^{\pm}\rightarrow tb$ such that ${\rm
BR}(H^{\pm}\rightarrow tb) \sim 80\%$. While this mode remains dominant over
the whole allowed parameter space of CMSSM, we realize some special domains in
the NMSSM and UMSSM, in which ${\rm BR}(H^{\pm}\rightarrow tb) \lesssim 10\%$.
In this context, the decay patterns of the charged Higgs can play a significant
role to distinguish among the SUSY models. In addition to the $tb$ decay mode,
we find that the narrow mass scale in CMSSM allows only the decay modes for the
charged Higgs boson to $\tau\nu$ ($\sim 16\%$), and their supersymmetric
partners $\tilde{\tau}\tilde{\nu}$ ($\sim 13\%$). On the other hand, it is
possible to realize the mode in NMSSM and UMSSM in which the charged Higgs
boson decays into a chargino and neutralino pair up to about $25\%$. {This
decay mode requires non-universal boundary conditions within the MSSM framework
to be available, since CMSSM yields ${\rm BR} (H^{\pm}\rightarrow
\tilde{\chi}_{1}^{0}\tilde{\chi}_{1}^{\pm}) \lesssim 1\%$.} It can also be
probed in near future collider experiments through the missing energy and
CP-violation measurements...
