Korea FTA Guide: Rules of Origin and How to Claim Preferential Duty

Key takeaways

• A preference applies only to goods that originate under the agreement's rules. "Made by a Korean company" is not enough.
• The proof differs by agreement: KORUS accepts a certification by the importer, exporter or producer. The EU and UK need the exporter's origin declaration on the invoice (approved exporter above €6,000; no EUR.1). China, ASEAN, India and several others need a certificate issued by KCS or KCCI.
• Certificates issued in Korea take up to 3 working days (10 if an on-site check is needed), so the supplier should apply before the goods ship.
• The importer carries the risk. Keep the proof and supporting records (at least five years under KORUS) and expect verification requests.
• Some claims save nothing in 2026: most Korean goods entering the US pay a 12.5% floor, and EU duty on cosmetics or smartphones is 0% anyway. See our 2026 tariff guide.

What is an FTA preference?

A free trade agreement (FTA) commits each partner to charge a lower duty, often zero, on goods that originate in the other partner. That lower rate is the preferential rate. The normal rate charged on imports from countries without an FTA is the MFN ("most-favoured nation") rate. The preference is not automatic: the importer claims it on the import declaration and must be able to show that the goods qualify.

A claim works only when three conditions are all met:

1. The product's HS code (Harmonized System code, the international classification number for goods) has a lower rate under the agreement.
2. The goods meet the agreement's rules of origin.
3. The importer holds the proof of origin the agreement requires and follows its procedures, including its shipping rules.

Korea has 23 FTAs in force with 60 countries as of September 2026, each with its own rules. For the duty each market actually charges today, see Korea's trade agreements and tariffs in 2026.

How do rules of origin work?

Rules of origin decide whether a product counts as Korean for the agreement. In broad terms, a product qualifies in one of three ways:

• Wholly obtained: grown, raised, fished or mined in Korea, such as Korean seafood or farm produce. Few manufactured goods qualify this way.
• Made only from originating materials: every input already counts as Korean (or partner-country) origin.
• Meets the product-specific rule: imported materials are allowed, provided the product passes the rule set for its HS code in the agreement's annex.

Product-specific rules use one test or a combination of these:

Four general rules sit around these tests:

• Tolerance (de minimis): a small share of imported materials that fail the tariff-classification test is allowed. Under KORUS it is 10% of the product's adjusted value for non-textile goods.
• Cumulation: materials originating in the partner country count as local. RCEP extends this across all 15 of its members.
• Insufficient processing: simple operations such as repacking, labelling or simple assembly do not make a product Korean. US Customs warns importers not to assume that goods substantially manufactured in Korea automatically qualify.
• Direct transport: goods must travel to the importing country without entering commerce or being processed in a third country. Transit through a hub is generally fine if the goods stay under customs control and are not worked on.

Apparel is the classic trap. KORUS applies a "yarn-forward" rule to most garments: broadly, the yarn, the fabric and the garment must all be made in Korea or the United States, so a garment sewn in Korea from imported Chinese fabric usually does not qualify. Our textiles and fashion guide covers sourcing; for your exact product, check the rule for its HS code in the agreement's annex or ask a broker.

Which proof of origin does each agreement require?

Each agreement has its own document and its own rules on who signs or issues it, and using the wrong one is a common reason claims fail. The table follows the Korea Customs Service (KCS) FTA portal as of October 2026.

For the EU, the declaration wording is fixed: "The exporter of the products covered by this document (customs authorisation No ...) declares that, except where otherwise clearly indicated, these products are of ... preferential origin." Approved exporters enter their authorisation number. Other exporters may use the declaration only while the originating products in the consignment total €6,000 or less, however many packages it contains. The UK–Korea agreement uses the same model.

Approved exporter status

In Korea, KCS grants approved-exporter status either company-wide or for specific products (by 6-digit HS code). It is valid for five years and renewable, and KCS reviews applications within 20 days. Applicants need an origin-management system, a designated origin manager, proper records and no violations in the previous two years. For EU and UK buyers, this status is essential for any consignment above €6,000, so ask about it before you place a large order. For some Asian agreements it also simplifies certificate applications.

Certificates issued in Korea

Where an authority issues the certificate, the exporter applies to KCS through UNI-PASS (Korea's electronic customs system) or to KCCI, usually attaching a copy of the export declaration and evidence of origin. By law the certificate must be issued within 3 days of the application, or 10 days if an on-site check is needed, not counting weekends and public holidays. Each agreement also sets when the certificate must be issued relative to shipment, so the supplier should apply before or as the goods ship rather than after the buyer asks.

What documents should I ask my Korean supplier for?

Agree the origin paperwork in your purchase order, not after the goods have left. Ask for:

1. An origin check before you order: where the goods are made, which HS code the supplier uses and whether the product meets the agreement's rule. A supplier that cannot answer is unlikely to pass a verification.
2. The proof your agreement requires (see the table above), with your details, the same HS code and description as the invoice, and a signature and date where required. For EU and UK consignments above €6,000, check the approved exporter's authorisation number.
3. For KORUS, a certification with all the required data elements, or a blanket certification covering up to 12 months of identical goods. It must be in your hands when you make the claim.
4. Manufacturer evidence if you buy through a trading company or agent. In Korea, the manufacturer typically gives the exporter a written origin confirmation (원산지확인서) that can cover repeat supplies for up to 12 months.
5. A commitment to support verification: a bill of materials listing each input's HS code and origin, cost data where a value rule applies, and a description of the production process. Under KORUS, a producer can send confidential data directly to US customs.
6. Matching shipping documents: commercial invoice, packing list and bill of lading or air waybill that agree with the origin document and show the route from Korea. See our export documents guide.

How long must I keep records, and can customs check my claim?

Yes, customs can check, and the importer carries the risk. By claiming a preference you certify that the goods qualify. Under KORUS, the US importer is responsible for the truthfulness of the claim, must keep records for at least five years from the date of importation, and must provide the certification and supporting documents when US Customs and Border Protection (CBP) asks.

Verification works differently by agreement. Under KORUS, CBP can verify the importer, exporter or producer directly and ask for bills of materials and cost data. Under the EU agreement, the importing country's customs asks Korea Customs Service to verify the exporter, which is called indirect verification. Korea's Asian agreements combine both methods.

If origin cannot be proven, the preference is withdrawn and the normal duty becomes payable, and penalties can apply where the importer did not take reasonable care. Under KORUS, an importer that promptly and voluntarily corrects an incorrect claim and pays the duty owed can avoid penalties.

What are the most common FTA mistakes?

• Treating a Korean brand as Korean origin. Goods a Korean company makes in China or Vietnam, or only repacks in Korea, do not qualify.
• Using the wrong document. A non-preferential KCCI certificate or an EUR.1 does not support an EU claim, and an ordinary exporter's declaration does not cover an EU consignment above €6,000.
• Claiming without the proof in hand. A KORUS claim based on a certification needs that certification in the importer's possession when the claim is made.
• Mismatched details. Different HS codes, descriptions or quantities on the invoice, the origin document and the import entry invite questions.
• Breaking the direct-transport rule. Unpacking, relabelling or selling goods in a third-country hub can cost the preference.
• Not re-checking. A supplier that switches to an imported material can lose origin without telling you. Ask for updated confirmation whenever materials, specifications or factories change.
• Missing deadlines. Issued certificates must be applied for around shipment, and KORUS refund claims after import must be filed within one year.

When does an FTA claim save nothing?

An FTA only helps if it lowers what you actually pay, and in 2026 there are several cases where it does not:

• US goods under the Section 301 floor. Since 24 July 2026, most Korean goods pay the higher of their KORUS/MFN rate and 12.5%. For products whose MFN rate is already below 12.5%, such as cosmetics (0%) or TVs (3.9%), the total is 12.5% with or without KORUS. For high-duty goods such as most apparel (16% to 32%), a valid claim still brings the total down to 12.5%. See our K-beauty import guide for cosmetics.
• A small US benefit remains: originating KORUS goods are exempt from the merchandise processing fee (MPF), which is 0.3464% of value within annual minimum and maximum amounts.
• US goods under Section 232 or exempt from Section 301. Cars, steel and other Section 232 goods pay their sector rate, and exempt items such as smartphones and laptops are duty-free anyway.
• EU goods that are 0% anyway. Cosmetics, shampoo, smartphones and laptops carry no EU duty, so the claim saves nothing on duty. For parcels worth up to €150, however, a full (H1) customs declaration with an FTA claim, and VAT not paid through IOSS, is the way to avoid the €3 per item low-value duty.
• Goods that do not originate. If the product fails the rule, there is nothing to claim. Paying the normal rate costs less than a denied claim with penalties.

For the full rate picture by market, see Korea's trade agreements and tariffs in 2026, and confirm the rate for your HS code with a licensed customs broker.

How Korea Import Hub helps with FTA paperwork

We are an Incheon-based sourcing agent founded by former Korean exporters, working in English, Korean, Japanese and Chinese. We check with suppliers, in Korean, whether your product is made in Korea and can meet the agreement's rule. We then arrange the origin paperwork with the export documents: origin declarations, certificates from KCS or KCCI, and the evidence behind them. When a good supplier sells only in Korea, we can buy on your behalf and handle the export; your customs broker makes the final claim. Send us your product and destination, and we will reply within 24 hours on business days with next steps and a written quote.

Frequently asked questions

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