  We study the phenomenological impact of a recently suggested formalism for
the combination of threshold and a so-called threshold-improved transverse
momentum resummation, by using it to improve the fixed-order results. This
formalism allows for a systematic improvement of the transverse momentum
resummation that is valid in the entire range of $p_T$ by the inclusion of the
threshold contribution. We use the Borel method as a suitable prescription for
defining the inverse Mellin and Fourier transforms in the context of combined
resummed expression. The study is applied to two QCD processes, namely the
Higgs boson produced via gluon fusion and $Z$ boson production via the
Drell--Yan mechanism. We compare our results to the standard transverse
momentum resummation, as well as to the fixed-order results. We find that the
threshold-improved transverse momentum resummation leads to faster perturbative
convergence at small $p_T$ while the inclusion of threshold resummation
improves the agreement with fixed-order calculations at medium and large $p_T$.
These effects are more pronounced in the case of Higgs which is known to have
slower perturbative convergence.
