The retorno is the return leg of a cross-border move, and 'cobrar el vacío' is the Mexican practice of pricing the empty return into the rate when no backhaul exists. On imbalanced lanes, the empty kilometers are part of the quote, stated or not.
Retorno means return, and in Mexican trucking it names the fundamental economics of every trip: the truck has to get back. When a lane reliably offers freight in both directions, the retorno funds itself. When it does not, the carrier prices the empty return into the outbound rate, the practice known bluntly as cobrar el vacío, charging for the empty.
Cross-border lanes are structurally exposed to this because flows are imbalanced by geography and season, and because cabotage rules prevent equipment and drivers from filling the gap with domestic loads on the other side. A Mexican truck delivering into a thin U.S. region legally needs an international load home, and if none exists, the empty miles belong to the trip.
When a rate on an imbalanced lane looks high, you are usually looking at the retorno, priced honestly. The productive response is to negotiate the system rather than the symptom: offer genuine backhaul freight, structure round trips, or accept that the lane carries its empty leg. Asking a carrier to eat the vacío as a discount works exactly once. For brokers with two-way freight, pairing northbound and southbound loads for the same carrier is the strongest rate lever that exists on cross-border lanes, and carriers reward the brokers who plan it deliberately.
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