Most of what’s written about bonded warehousing assumes the freight shows up on a truck. On the Laredo corridor, a lot of it shows up on rail — and the handoff from railcar to bonded storage is where shippers lose days if the pieces aren’t lined up. Here’s the sequence as it actually runs at a rail-served customs bonded warehouse in Laredo.
1. The freight moves in-bond, not entered
A loaded railcar coming north from Mexico can cross without a consumption entry. Your customs broker files an in-bond movement — an IT (Immediate Transportation) — that lets the car travel under customs control from the port of entry to the bonded destination. No duty is paid at the border. The car is sealed, the manifest shows the bonded warehouse as the destination, and the clock on the in-bond movement starts.
2. Union Pacific delivers to the spur
For us, “bonded destination” means our own building. UP spots the car on the private spur inside the fence — no team track, no public ramp, no drayage leg. The car arrives at the dock, seals intact, under the same bond it crossed with.
3. Seals are checked, the car is received under bond
Before anything comes off, seals are verified against the in-bond paperwork. Count and condition are recorded as the car is unloaded directly into bonded space. From this point the freight is in our bonded inventory, under our custody, and the duty is deferred.
4. The broker reports arrival to CBP
We send the receiving record — seal verification, count, condition, time spotted — to your customs broker, who reports the in-bond arrival to CBP and files the warehouse entry. That closes the transportation leg and opens the storage leg: “in transit under bond” becomes “in storage under bond.” Done the same day the car is worked, it keeps everything inside the in-bond time limit. We don’t do the filing; we make sure the broker has what they need to do it fast.
5. Freight waits — or works — without duty
Now the product can sit for up to five years from import date. It can also be handled under Class 8 without triggering duty: sorted, repacked, relabeled, broken down into smaller lots. For rail freight that lands in car-quantity and ships in truck-quantity, this is where the economics live.
6. Withdrawal, one truck at a time
Product leaves bonded storage as it’s sold. Each withdrawal for consumption is entered by your broker and duty is paid on that portion only. Or, if it’s going back to Mexico or onward to another country, it withdraws for export and duty is never paid at all. Either way, the truck loads at the same dock the railcar unloaded at.
What makes this fast or slow
The whole sequence is routine. What stretches it is any gap between the pieces: a car terminating at a ramp across town from the bonded warehouse, a broker who doesn’t have the warehouse’s bond details in advance, or arrival paperwork filed days after the car is worked. When the spur, the warehouse, and the bond are all under one roof, the sequence collapses to the time it takes to unload the car.
What to send us before the car crosses
- In-bond number and your broker’s contact
- Commodity, HTS and declared value
- Car number and expected spot date
- Whether the freight will manipulate (Class 8) or just store
- Whether withdrawals will be domestic, export, or both
With those, we can have the car received and the record in your broker’s hands the day it spots.
Related: rail vs. truck across the Laredo border · bonded classes 3, 4, 8 and 11 explained · what a 10-car spur saves