How Do Freight Brokers Track Which Lanes Are Losing Money?

Freight brokers track losing lanes by comparing customer revenue against actual carrier cost at the lane level, on a recurring schedule, with enough history to see the trend. Most brokers only do this at the account level or the quarterly P&L level, which is exactly why losing lanes survive for months. The answer is lane-level margin tracking, and the method matters less than the discipline of doing it continuously.