  We study the complete one loop contribution to $H^\pm\to W^\pm V$, $V= Z,
\gamma$, in the Minimal Supersymmetric Standard Model (MSSM). We evaluate the
MSSM contributions taking into account $B\to X_s\gamma$ constraint as well as
experimental constraints on the MSSM parameters. In the MSSM, we found that in
the intermediate range of $\tan\beta \la 10$ and for large $A_t$ and large
$\mu$, where lightest stop becomes very light and hence squarks contribution is
not decoupling, the branching ratio of $H^\pm \to W^{\pm} Z$ can be of the
order $10^{-3}$ while the branching ratio of $H^\pm \to W^{\pm} \gamma$ is of
the order $10^{-5}$. We also study the effects of the CP violating phases of
Soft SUSY parameters and found that they can modify the branching ratio by
about one order of magnitude.
