Here in NY (non-NFHS...so far), the pay is negotiated with the various sections. This is what we currently get in our section, which is in the extreme northern suburbs of NYC (and hold onto your hat):
Modified (Middle School): $62
JV: $71
Varisty: $95
We get assigned by a Section wide education cooperative agency that does all the scheduling (for both schools and officials), assigning AND payments - all withOUT assigning fees.
And they get more down in NYC and on Long Island