LTL pricing is built on three stacked layers. The first is base line haul, calculated as the freight class factor multiplied by your shipment weight (in CWT — hundredweight, or 100-pound units) multiplied by road miles between origin and destination. Class factors are published per-100-pound rates indexed to commodity density, handling, stowability, and liability. A class 50 commodity (high density, easy to handle) prices around $0.07 per CWT-mile; class 500 (low density, fragile) can exceed $0.50. Industry CWT-mile benchmarks come from SMC³ CzarLite, the published rate base used by most LTL carriers as the starting point for contract negotiations.
The second layer is the fuel surcharge (FSC), a percentage applied on top of base line haul. Carriers index FSC weekly to the EIA national average on-highway diesel price, typically starting the surcharge at $1.10/gallon and stepping up 1–2 percent per 4-cent diesel increase. With diesel near $3.80/gallon, FSC sits around 32–38 percent of line haul; at $4.50, it pushes 45 percent or more. Coyote Logistics and Project44 publish an LTL spot index that tracks weekly FSC movement across major lanes.
The third layer is accessorials — flat fees for anything outside a standard dock-to-dock pickup and delivery. Liftgate, residential, inside delivery, appointment, limited access, hazmat, and notification each carry a published per-shipment fee. These are where invoice disputes most often surface, because the carrier bills based on what their driver reported, not what was quoted. The estimator above adds whichever you check; in practice, residential plus liftgate is the most common combo on B2C deliveries.