Unless the carrier is brand new to trucking; they’re gonna tell you what is paid and you can take it or leave it. They’ve done the math prior to meeting you.
Also, % varies with what kind of operation it is/ who finds the work & dispatches, where the work comes from, who files the ifta, who pays for plates, who has the trailer(s)/ all have implications on cost for either party and will likely have an impact on who is willing to pay for what (Via % higher or lower)
You pay for plates? IFTA? State permits? Manage safety and regulatory filings? Keep the maintenance file? Keep the driver file? Handle the consortium paperwork and fees? Have your own direct customers/ are the one dealing with brokers? Setting rates and terms?
If you are doing all that, why lease on at all?
*point being- if you’re doing it all anyway, leasing on you’re paying 15% (at 85% contractor pay) for a week + lag time on factoring receivables/