  The differences between the on-shell mass and width of the Higgs boson and
their pole counterparts are evaluated in leading order. For a heavy Higgs
boson, they are found to be sensitive functions of the gauge parameter and
become numerically large over a class of gauges that includes the unitary
gauge. For a light Higgs boson, the differences remain small in all gauges. The
pinch-technique mass and width are found to be close to their pole counterparts
over a large range of Higgs boson masses.
