HS codes for Korean exports: who decides, and what changes in 2028

Six digits are international. The rest are not

The Harmonized System is maintained by the World Customs Organization and is common to its members at the six-digit level. Every country then extends it for its own tariff and statistics, and those extensions do not match each other.

So a 10-digit HSK code from a Korean supplier is not a US classification. Truncating it to six and rebuilding the rest against the destination's own schedule is the correct move; carrying the full Korean code across is the most common classification error on this lane, and it usually surfaces as a duty difference rather than as a rejection.

Who actually decides

Classification is declared by the party filing and determined by the authority. Two routes exist for settling it before the goods move, and both are worth using on a product you will ship repeatedly.

• Korea. The Korea Customs Service, an agency under the Ministry of Economy and Finance, administers HSK at the point of entry and issues advance classification rulings on application. Allow time: published guidance for exporters indicates a determination can take up to 90 days after a complete application.
• United States. CBP issues binding rulings, requested through its eRulings system to the National Commodity Specialist Division. Before applying, search CROSS, CBP's online database of past rulings — a ruling already exists for a great many products, and finding one is faster and cheaper than requesting your own.

A ruling is worth the delay when the code is arguable, when the duty difference between two plausible headings is material, or when an FTA preference depends on which heading the goods fall in.

HS 2028: the revision already adopted

The Harmonized System is revised on a five-year cycle, and the next edition is settled. The Harmonized System Committee provisionally adopted the amendments at its 75th session in March 2025; the Recommendation was formally adopted at the end of December 2025, made public in January 2026, and takes effect on 1 January 2028.

The scale is worth knowing before assuming it will not touch your goods. HS 2028 comprises 299 sets of amendments, giving a nomenclature of 1,229 headings and 5,852 subheadings. Against HS 2022, six headings and 428 subheadings are new, while five headings and 172 subheadings are deleted. The WCO publishes correlation tables between the 2022 and 2028 editions, which is the practical tool for checking your own codes.

Two years is not long for a catalog of any size. The work is a mapping exercise: list the codes you actually use, run them through the correlation tables, and note every one that splits, merges or disappears.

Why a reclassification can break an origin claim

This is the part that catches exporters, and it is the reason to start before 2028 rather than during it.

Preferential origin under an agreement such as the Korea–US or Korea–EU FTA is frequently decided by a change-in-tariff-classification rule: the non-originating inputs must fall in a different heading or subheading from the finished good. Those rules are written against specific HS headings. When the nomenclature moves underneath them, a product that satisfied a tariff shift can stop satisfying it — not because anything about the product or its inputs changed, but because the headings did.

So the mapping exercise above is not only a duty-rate question. For anything you ship under KORUS origin or an EU–Korea origin declaration, re-run the origin determination against the new headings rather than assuming the existing certificate carries over. Where a long-term or blanket declaration spans the change, check whether it still holds for its whole period.

A working method

1. Classify from the goods and their function, not from the supplier's invoice description.
2. Fix the first six digits, then build the national code separately for each destination.
3. Search existing rulings before requesting one — CROSS for the US, and the authority's own publications for Korea.
4. Record why a code was chosen. The reasoning is what you will need if it is questioned two years later.
5. Make the export control determination at the same time — it uses the same technical specification and is a different question entirely.
6. Remember the code also defines the substitution pool for duty drawback — classification is an eligibility question, not only a rate.
7. Keep the code on your export shipping documents consistent with what was declared.
8. Before 2028, map every code you use through the WCO correlation tables and re-check every origin rule that depends on one.

Tariff rates, national extensions and ruling procedures change. This explains how the system fits together and where to check; confirm the current position with the authority or a licensed customs broker.

Keeping the classification with the shipment

A code is a decision, and decisions get made twice when nobody can find the first one. Cargovate's platform keeps one record of a shipment across carriers and borders, so what was declared, and on what basis, stays attached to the consignment rather than living in the broker's email.