Place a strip of siding on the work table and align the place you plan to cut it with the edge of the table.
Cutting hole in vinyl siding.
A clean way to cut vinyl siding is to score it with a utility knife and then bend the vinyl at the score.
Fit a circular saw with a fine toothed plywood cutting blade.
When making longitudinal cuts score with a knife and break along the score line.
For the smoothest cuts put the blade in.
Make crosscuts on vinyl siding using a circular saw but you should install a vinyl cutting blade to minimize chip out.
It should snap apart.
Use tin snips or a rotary tool to make curved cuts.
A hole saw tin snips etc will slice right through it.
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The best way to cut vinyl siding circular saw.
You can also use tin snips to make crosscuts.
Cut a scrap piece of siding to a length that is several inches longer than the hole.
Cutting the vinyl siding is easy.
That said the hole is the least of your effort.