  Threshold corrections to the bottom quark mass are often estimated under the
approximation that tan$\beta$ enhanced contributions are the most dominant. In
this work we revisit this common approximation made to the estimation of the
supersymmetric threshold corrections to the bottom quark mass. We calculate the
full one-loop supersymmetric corrections to the bottom quark mass and survey a
large part of the phenomenological MSSM parameter space to study the validity
of considering only the tan$\beta$ enhanced corrections. Our analysis
demonstrates that this approximation underestimates the size of the threshold
corrections by $\sim$12.5% for most of the considered parameter space. We
discuss the consequences for fitting the bottom quark mass and for the
effective couplings to Higgses. We find that it is important to consider the
additional contributions when fitting the bottom quark mass but the
modifications to the effective Higgs couplings are typically
$\mathcal{O}$(few)% for the majority of the parameter space considered.
