Estadías are the per-day charges for equipment, usually a trailer, held beyond free time at a yard, border facility, or customer site. Cross-border moves are especially exposed because trailers routinely sit at the border waiting on documents.
Estadías (literally 'stays') are the charges that accrue when equipment sits beyond its free time: a trailer held at a border patio, a container at a yard, a caja waiting at a customer's dock over a weekend. Where demoras compensate a driver and tractor standing still, estadías compensate the asset itself, and in cross-border freight the asset that waits is almost always the trailer.
The structural driver is the border. A through-trailer move parks the box at yards on both sides while pedimentos, payments, and transfer slots line up, and border yards typically give a free window before daily charges start. Add a document problem or a customs exam and days accumulate quickly, on equipment the owner cannot use elsewhere.
Treat trailer time as a costed resource on every cross-border lane. Know the free days at each yard in the route, know the daily rate after that, and know who pays when the delay comes from the shipper's paperwork versus the carrier's scheduling versus customs. Trailer owners guard this fiercely, and brokers who dismiss estadías as padding lose the best equipment providers. Fast document flow is the real cost lever: lanes where the shipper's agente aduanal consistently has paperwork ready cross in the free window; lanes with chronic document lag quietly cost more than their linehaul rate suggests.
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