What Is Transshipment? Cargo That Clears No Customs in Korea Can Still Lose Its FTA Origin

What is transshipment under Korean law?

Transshipment is the transfer of goods from an arriving means of transport to a departing means of transport within the jurisdiction of the same customs office. That is the definition in Article 2(14) of the Korean Customs Act. A container that arrives in Busan from Ningbo and leaves Busan on a different vessel bound for Long Beach is transshipped cargo.

The point that matters commercially is that the cargo never enters Korea. Article 3(1)1 of the Special Notice on Procedures for Transshipment Cargo defines its scope as goods brought into Korea and taken back out "without going through import, export, or re-export clearance procedures." The box touches Korean soil and is lifted again. No duty and no VAT attach. In exchange, the cargo remains foreign goods under customs control for the entire time it sits there.

How does transshipment differ from multi-district transshipment?

The dividing line is whether the cargo crosses into another customs jurisdiction.

Korean regulation adds one case that surprises shippers. Article 2(2) of the Special Notice counts a transfer from vessel to aircraft, or aircraft to vessel, as multi-district transshipment even inside a single customs district. Sea-air routings therefore carry the stricter regime regardless of geography.

Why does my cargo route through a hub instead of sailing direct?

Because no carrier can run a direct service between every pair of ports. Thin trades are collected by smaller vessels into a large port, consolidated onto a mainliner, and distributed again at the far end. A transshipment hub is where that gathering and splitting happens.

In Korea, that hub is Busan. Korea's Ministry of Oceans and Fisheries reported 2025 throughput at Busan of 24.88 million TEU, of which 14.10 million TEU was transshipment. Roughly 57 percent of the containers moving through Busan neither enter nor leave Korea as trade. National transshipment volume the same year was 14.41 million TEU, so almost all of Korea's transshipment happens at that single port. Import and export volumes fell year on year both nationally and at Busan, while transshipment grew.

What changes for the cargo owner is that the shipment is now exposed to two schedules instead of one. If the first vessel arrives late, the connection is missed, and the next sailing is typically a week away. Sea-Intelligence put global schedule reliability at 62.6 percent in June 2026, with an average delay of 5.31 days for vessels that arrived late. Close to four vessels in ten do not arrive when the schedule says, and a transshipped box has to clear that gate twice.

Containers that miss the connection roll to the next sailing. If the lead time is tight, it is worth checking at booking whether a direct service exists and, if not, which port the cargo waits in and for how long. Carriers publish the transshipment port and connection time in their schedules.

Does transshipped cargo get declared to Korean customs?

It is not cleared, but it is declared. Those are different things.

Article 141(3) of the Customs Act requires anyone transshipping foreign goods from one means of transport to another to declare it to the head of the customs office and obtain on-site confirmation by a customs officer. The same article lets the Commissioner of the Korea Customs Service simplify or waive that step where surveillance is not compromised, and the Special Notice sets out those simplified procedures.

In practice the paperwork appears at these points.

1. The carrier or its agent files an unloading declaration when the cargo comes off.
2. The bonded facility operator files an inbound declaration on arrival and an outbound declaration before release, as an electronic document at House B/L level.
3. Anyone opening the container to stuff or strip it files a transshipment declaration before the work begins.
4. Moving the cargo into another customs district requires a bonded transport declaration.
5. If the seal number or other cargo details differ from what was declared on arrival, a loading discrepancy report goes in before the vessel departs.

Bonded transport is declared at House B/L level by default, but a single-shipper FCL load, or an LCL load moving to the same destination without being stripped, may be declared at Master B/L level (Special Notice Art. 7(1)). How the cargo was consolidated therefore drives how many filings it generates. The FCL and LCL distinction is covered in LCL vs FCL ocean freight.

The destination of that bonded transport is limited to the unloading or loading place of the port or airport where the goods will be loaded (Art. 7(2)). A shipper, carrier, or freight forwarder that wants to move transshipment cargo itself must post security covering duties and taxes, which the customs office may waive for a designated simplified bonded transport operator (Art. 7(6)). The general bonded regime is covered in bonded areas and bonded transport.

How long can cargo sit between customs districts?

Seven days from the date of the unloading declaration. Article 8(5) of the Special Notice sets that deadline for multi-district transshipment cargo.

Cargo not moved within that window requires the transport declaration to be withdrawn with the customs office at the port of arrival (Art. 8(6)). The withdrawal may be effected by changing the designated release bonded area on the cargo manifest back to the original arrival bonded area. In other words, a box declared for Busan-to-Incheon that does not move in time is put back, on paper, where it landed.

Air has its own allowance. Where cargo is unloaded from an aircraft and reloaded onto another aircraft at the same airport, it may be held temporarily at a customs-designated location on the apron rather than being moved into the unloading area, for a period set by the customs office within 10 days of arrival, extendable by up to another 10 days (Art. 4(5)). Dangerous goods are excluded.

Can the container be opened or the cargo repacked in transit?

Yes, with approval, and only in designated places.

Anyone performing stuffing or stripping work must file a transshipment declaration describing the work with the customs office having jurisdiction over the work site, before the work starts (Special Notice Art. 6(1)). Adding export cargo or other transshipment cargo into the box counts as such work. The work must be done at a container freight station within a bonded container yard or in a bonded area inside an airport, with narrow exceptions such as reefer cargo that has to be handled at the ship's side (Art. 6(2)).

Repairing damage or deterioration, and operations such as opening, splitting, combining, or origin marking, require approval for maintenance work (Art. 10(1)). Being on the list of approvable operations means these may not be done without approval.

One caution belongs here. The range of work customs will approve and the range of work that preserves origin are not the same range. An approval for maintenance work does not carry origin with it.

Does transshipment break FTA origin?

Transshipment by itself does not break origin. What breaks it is handling the goods at the intermediate country.

Article 76 of the Enforcement Rules of the Customs Act provides that, when determining origin, goods are recognized as originating only if transported and brought into Korea directly without passing through a non-originating country. Goods are nonetheless treated as directly imported where all three of the following hold.

All three must hold together. Once the cargo leaves the bonded area, or is repacked or relabeled, the direct transport test fails. The equivalent requirement that applies when claiming preferential tariffs under a specific FTA sits in a separate statute and is covered in FTA origin criteria.

What does a non-manipulation certificate prove?

A non-manipulation certificate is a document issued by the Korean customs office confirming that transshipment cargo temporarily stored in a bonded area left the country without additional processing. Article 12 of the Special Notice is the basis. It records officially that nothing was done to the goods beyond unloading, reloading, work required for transport, and operations needed to keep them in good condition.

Its use is specific. It answers the destination customs authority when it asks what happened to the goods during their time in Korea. It converts the third direct transport condition, the one about additional work, from a claim the importer asserts into a fact the transit country's customs office confirms. The customs office applies the direct transport rule of Article 76 when reviewing the application (Art. 12(3)).

To obtain one, the applicant files a temporary storage confirmation issued by the bonded facility operator or free trade zone occupant, together with the application form. The confirmation states the storage location, the cargo management number, the B/L or AWB number, the arrival date, the description and weight, and the fact that no processing beyond good-condition maintenance took place.

Where cargo is transferred directly between vessels without being brought into a bonded area, the temporary storage confirmation may be waived (proviso to Art. 12(2)). Nothing was stored, so there is no storage to confirm.

The procedure for obtaining a certificate of origin, and the difference between authority-issued and self-certified forms, is covered in certificates of origin and FTA tariffs.

What gets missed on transshipment legs?

Three things recur.

First, not identifying the transit port at booking. The evidence a destination customs authority will want is created at the transit port, and it is hard to obtain once the cargo has moved on. For any shipment that will claim preferential tariffs, the transit country and the form of storage there should be known in advance.

Second, insurance coverage. Whether the transshipment leg and the waiting time it entails fall inside the coverage the policy actually grants is a separate question to put to the underwriter. Coverage periods are covered in marine cargo insurance.

Third, seals. Where the container seal number differs from the cargo information declared on arrival, a loading discrepancy report must be filed before the vessel departs (Special Notice Art. 11). A record that the seal changed is exactly what a destination authority will point to when contesting direct transport.