Korea FTA Rules of Origin: Does Your Product Qualify?

Korea’s free trade agreements (FTAs) lower or remove import duties only when the goods meet that agreement’s specific rules of origin and the origin is properly certified. An FTA existing between two countries is not enough. You need to check the product-specific rule for your HS code under the exact agreement you plan to use, and make sure the supplier can support the origin claim.

Key takeaways

• Preferential duty applies only if the goods qualify under the agreement’s rule, such as wholly obtained, change in tariff classification or regional value content.
• Depending on the FTA, the exporter, the producer or sometimes the importer certifies origin, and the importer claims the preference.
• Look up the current product-specific rule on the Korea Customs Service FTA portal or your own customs authority’s site.

How rules of origin work

Under Korea’s FTAs, a good usually qualifies as “originating” in one of three ways:

1. Wholly obtained or produced in the territory of the FTA partners, for example agricultural products grown there.
2. Made entirely from originating materials.
3. Made with some non-originating materials that satisfy the product-specific rule. That rule is commonly a change in tariff classification (the imported inputs must fall under a different HS heading or subheading from the finished product) or a minimum regional value content (RVC).

The details differ by agreement and by HS heading. These include the RVC percentage, the calculation method (for example “build-down” or “build-up”), de minimis tolerances for small amounts of non-originating content, and cumulation rules. For the Korea–US FTA (KORUS), the rules are in the agreement’s annexes and in the US tariff schedule. The Korea–EU FTA, RCEP and Korea’s other agreements each have their own annexes.

Who certifies origin, and how you claim

Certification depends on the agreement:

• KORUS: a certification of origin can be made by the exporter, the producer or the importer, based on supporting information.
• Korea–EU FTA: origin is usually declared on the invoice by an approved exporter.
• Some agreements: a certificate issued by an authorized body.

The importer claims the preferential rate on the import declaration. Under many agreements, the importer can also claim it within a set period after import. If customs later verifies the claim, you must be able to produce the certificate or declaration and supporting records.

The Korea Customs Service FTA portal publishes agreement texts, product-specific rules and preferential rates for imports into Korea. US Customs and Border Protection publishes KORUS guidance for the US side.

Practical steps for buyers

1. Confirm the HS code. Use a customs broker or, for higher-value lines, an advance ruling. Our HS code guide explains the basics.
2. Look up the product-specific rule for that code under the relevant FTA.
3. Ask the Korean supplier whether the product meets the rule, and agree before shipment who will provide the certificate or declaration.
4. Check the document for the required data elements and the correct HS code.
5. Keep records for the period your customs authority requires.

Worked example: RVC under a build-down method (illustrative). Assume a product’s adjusted value is 100 USD and the value of non-originating materials is 52 USD.

• RVC = (adjusted value − non-originating material value) ÷ adjusted value × 100
• RVC = (100 − 52) ÷ 100 × 100 = 48%

If the rule requires at least 45% under build-down, the product qualifies. If it requires 55%, it does not, unless the supplier changes inputs or the agreement allows another option. The actual threshold and method for your HS heading must come from the official rule text.

For how origin certificates are issued in practice, see our guide to certificate of origin issuance.

A certificate of origin is separate from the physical origin mark Korea requires on many imports; see Korea Origin Marking: When Must Your Import Carry It?.

Common mistakes

• Assuming any product from Korea qualifies for zero duty because an FTA exists.
• Accepting a certificate or declaration that lacks required data or shows a different HS code.
• Not keeping supporting records that customs may ask for in a later verification.
• Using an old annex or HS version after the rules have been updated.

FAQ

Where do I check the rules of origin for a product from Korea?

Use the Korea Customs Service FTA portal and search by HS code to see the product-specific rule under each agreement. Your own customs authority, such as US CBP for KORUS, publishes parallel guidance.

Who issues the FTA certificate of origin?

It depends on the agreement. Under KORUS, the exporter, producer or importer can certify origin. Under the Korea–EU FTA, approved exporters make origin declarations. Some agreements use certificates from authorized bodies.

Can I claim the FTA rate after the goods have been imported?

Many agreements allow a claim after import within a set deadline, provided you have the origin documents. Check the exact procedure and deadline with your customs authority.

Do FTA rules of origin change?

Yes. Agreements are amended and HS versions are updated, which can change product-specific rules. Always check the current official text.

Sources

• Korea Customs Service, official English website: https://www.customs.go.kr/engportal/main.do
• Korea Customs Service, FTA portal: https://www.customs.go.kr/ftaportalkor/main.do
• U.S. Customs and Border Protection, Korea Free Trade Agreement (KORUS): https://www.cbp.gov/trade/priority-issues/trade-agreements/korea

Last checked: 2026-10-28