Freight Mistakes

Freight and Distribution: The Costly Mistakes That Wreck Your Cost per Unit

A troubleshooting guide to the most expensive errors in freight and distribution costing, each with a symptom, root cause, and a numeric fix.

Symptom: your parcel invoices run 20 to 40 percent over quote. Root cause is almost always dimensional weight. Carriers bill the greater of actual weight and dim weight, calculated as length times width times height divided by a divisor of 139 (domestic) or 166 (imports). A 18 by 14 by 12 inch box weighing 6 lb bills at 22 lb dim weight (3024 / 139), so you pay for 22, not 6. Run every SKU through the Parcel Shipping Cost calculator with real carton dimensions before quoting. Reducing that box to 16 by 12 by 10 drops dim to 14 lb and cuts the line by roughly a third.

Symptom: freight cost per unit swings wildly between identical shipments. The root cause is spreading fixed freight over the wrong unit count. Freight Cost per Unit is total landed freight divided by good units received, but teams often divide by units shipped, ignoring 2 to 5 percent damage and shortage. Ship 1,000 units at 900 dollars freight and lose 30 in transit, and true cost is 900 / 970, not 900 / 1000, a 3 percent understatement. Always reconcile to receiving scans, not the packing list, and pull the count from the same system every period.

Symptom: a trailer looks full but the utilization report shows 62 percent. The mistake is confusing floor coverage with true fill. A 53 foot van holds about 3,800 cubic feet and roughly 45,000 lb payload; light freight cubes out before it weights out. If pallets stack single high at 48 inches in a 110 inch trailer, you waste 56 percent of vertical space. Feed pallet count, stack height, and weight into the Truckload Utilization calculator and target 90 percent of the binding constraint. Double stacking those pallets can move fill from 62 to 88 percent with zero added miles.

Symptom: you default to LTL because it feels cheaper for small loads, but annual freight is climbing. The crossover mistake is ignoring the break point. LTL pricing scales by class and weight with accessorials, and above roughly 12 to 15 pallets or 15,000 lb, a full truckload usually wins per hundredweight. Run both scenarios through the LTL vs FTL Cost Comparison calculator on every lane monthly. A 14 pallet shipment quoted at 1,450 LTL may move for 1,150 as a partial truckload, a 21 percent saving that vanishes if nobody checks.

Symptom: detention charges appear on invoices you never budgeted. Root cause is treating driver dwell as free. Carriers grant about 2 hours free at the dock, then bill 50 to 100 dollars per hour. Twelve loads a week averaging 90 minutes over is 12 times 1.5 times 75, or 1,350 dollars weekly, 70,000 a year hiding in accessorials. Log gate in and gate out timestamps and run them through the Truck Detention Cost calculator. Fixing dock scheduling to hit the 2 hour window is usually cheaper than absorbing the fee or the rate increase that follows.

Symptom: your fuel line item looks stable while total freight rises. The error is not tracking surcharge separately from base rate. Fuel surcharge floats with the DOE diesel index, often 20 to 35 percent of a truckload rate at 4.00 to 4.50 dollars per gallon diesel. If you negotiate base rate down 5 percent but diesel jumps 40 cents, surcharge can erase the win. Isolate the two components using the Fuel Surcharge Impact calculator so you know whether a rate change came from your negotiation or the market, and index accessorials to the same peg.

Symptom: route cost per stop drifts up even though volume is flat. Root cause is measuring miles but not productive time. Delivery Route Cost and Delivery Route Productivity split cost into driving versus dwell; a route running 6 stops per hour of drive time but 2.5 stops per clock hour is bleeding time at the curb. If a driver logs 8 paid hours and only 4.5 are productive, effective cost per stop nearly doubles. Track stops per paid hour, not per mile, and rebalance territories when the ratio falls below your baseline by more than 15 percent.

Symptom: carriers accept fewer of your tenders during peak and spot rates spike. The mistake is watching price without watching acceptance. Carrier Rate Acceptance tracks the share of tendered loads a carrier takes at your contract rate; drop below 90 percent and you are quietly buying spot at a 15 to 30 percent premium on the rejected loads. If 200 weekly tenders see 85 percent acceptance, 30 loads hit spot, and at a 20 percent premium on a 1,200 dollar base that is 7,200 dollars a week. Monitor acceptance by lane and reprice before it collapses, not after.

Published 2026-07-01.