  The off-shell Higgs production in pp -> ZZ at LHC provides at present the
most direct measurement of the Higgs width in the absence of beyond the
standard model contributions. Here, we analyze the impact of anomalous Z
couplings to fermions on the Higgs width determination. We show that, despite
these couplings being strongly constrained by the available electroweak
precision data, they can substantially affect the Higgs width determination at
the LHC Runs 2 and 3. Conversely, in larger integrated luminosities runs, such
as those foreseen at the high luminosity LHC and high energy LHC setups, the
effect of such anomalous interactions in the Higgs width measurement is
minimal.
