Compare what the customer pays against what the carrier gets, in dollars and percent.
Margin has to cover far more than it appears to — staff, software, insurance, claims, and the working capital gap between paying carriers fast and being paid slow. Enter loaded miles and monthly volume too, because a thin margin on frequent freight often beats a fat one on a lane that moves twice a quarter. Always calculate against the customer rate, not carrier pay: $450 on $1,950 of carrier pay sounds like 23 percent but is 18.75 percent of what the customer actually paid, and that error is exactly what makes a book look healthier than it is. Twelve to twenty percent is normal; under ten leaves nothing for a claim.
The things carriers ask most about this calculation.
Twelve to twenty percent is the common range, with fifteen percent a frequent target. Spot freight can run higher when capacity is tight, while dedicated contract lanes usually settle lower in exchange for volume and predictability.
Subtract what you pay the carrier from what the customer pays you. Divide that by the customer rate for margin percentage. Brokers who quote margin on carrier pay instead of customer rate end up overstating it.
Percentage scales with rate, which protects you when linehaul rises, but on very long or very short hauls a flat minimum per load often makes more sense. Many brokers use whichever is greater.
It has to cover staff, software, insurance, and the cost of paying carriers before the customer pays you. Quick-pay and factoring costs come straight out of this number, which is why sub-ten-percent loads rarely work.

