Certificate of Origin and FTA Duty: How to Reach a 0% Preferential Rate, and Self vs. Authority Issuance
The same goods can carry a different duty depending on which country they came from. If the origin is a country Korea has an FTA with, you can claim the preferential rate (usually 0%) instead of the base rate, and the key to that is the certificate of origin. Missing a single document and paying full duty anyway is a common mistake in practice.
What Is a Certificate of Origin (C/O)?
A certificate of origin (C/O) is a document proving which country goods originate from. When it proves the goods originate in an FTA partner country, the import is charged the preferential rate set in the agreement rather than the base rate.
For example, goods with an 8% base rate often drop to 0% duty when they originate in an FTA partner country and the certificate of origin proves the requirements are met. Without a certificate of origin, or if the requirements are not met, you cannot claim the preferential rate and pay the base rate in full.
Three Things Must Line Up to Claim the Benefit
Having a certificate of origin alone does not automatically secure the preferential rate. Three things must be met together.
- Origin criteria met: the goods must qualify as originating in the partner country under the criteria set by the agreement.
- Certificate of origin in hand: you must have a valid certificate of origin issued in the prescribed manner.
- Direct transport rule met: the goods must be shipped directly from the partner country to Korea.
Origin Criteria
There are broadly three criteria for goods to qualify as originating in the partner country.
- Wholly obtained criterion: goods fully grown or extracted in that country (agricultural and marine products, minerals, and so on).
- Change in tariff classification criterion: origin is recognized when the HS code (tariff item number) changes by at least a set level between raw materials and the finished product.
- Value-added criterion: recognized when the share of value added in that country meets or exceeds the threshold.
Because the change in tariff classification criterion is judged by HS code, determining your goods' origin and preferential rate starts with pinning down the tariff item number via the HS code.
Self-Issuance vs. Authority Issuance: It Varies by Agreement
Who issues the certificate of origin depends on the agreement. Not knowing this distinction can block issuance entirely.
| Type | Who issues | Applicable agreements (examples) |
|---|---|---|
| Self-issuance | The exporter fills it out and signs it | Korea-US, Korea-EU, Korea-EFTA |
| Authority issuance | Customs or a chamber of commerce | Korea-ASEAN, Korea-China, Korea-India |
Self-issuance is where the exporter verifies origin and signs it themselves, while authority issuance is where an issuing body such as customs or a chamber of commerce reviews and issues it. Because the preparation process differs entirely depending on which method an agreement uses, check the agreement with your export destination first.
The Approved Exporter Scheme
An approved exporter is an exporter certified by the Commissioner of Korea Customs Service or a customs office head as capable of managing origin, and receives self-issuance authority or simplified documentation. Under some agreements, only approved exporters may self-issue. For example, under the Korea-EU FTA, only approved exporters may self-issue a certificate of origin when the export value per shipment exceeds 6,000 euros. If you export to Europe regularly, becoming an approved exporter is effectively essential.
Missed It at Import? You Can Recover Within One Year
Even if you could not prepare the certificate of origin at import and missed the preferential rate, there is a way out. Within one year from the date the import declaration is accepted, in Korea you can apply for retroactive application of the preferential rate and claim a correction of the duty already paid.
That said, a certificate of origin has a validity period that varies by agreement, and it loses effect once that period passes. So to apply retroactively, you must file within the certificate of origin's validity period. If the document was missing at the time of import, securing a valid certificate of origin and recovering within one year is the way to save on duty.
Common Mistakes in Practice
- Assuming the certificate of origin is all you need: the origin criteria and the direct transport rule must also line up to claim the preferential rate.
- Wrong issuance method: preparing authority issuance for a self-issuance agreement, or vice versa.
- Overlooking the direct transport rule: origin gets denied when goods transit or transship through a third country without meeting the requirements.
- Missing the retroactive deadline: failing to recover after passing the one-year window or the certificate of origin's validity period.
How much duty your goods can save and under which agreement starts with checking the HS code. What an HS code is and how to find it is covered in What Is an HS Code.
This guide is general information as of July 2026. Origin criteria, issuance requirements, and rates vary by agreement and are revised often, so confirm actual application with the Korea Customs Service FTA portal and a licensed customs broker.
Interactive tool
HS code lookup tool
Find an HS code by product name and compare the base rate with the FTA preferential rate. Judging the change in tariff classification criterion and checking the preferential rate is where origin determination begins.
Frequently asked questions
Why do I need a certificate of origin (C/O)?
It proves the goods originate in an FTA partner country so you can apply the preferential rate (usually 0%) instead of the base rate. Without a certificate of origin, or if the requirements are not met, you cannot claim the preferential rate and pay the base rate in full.
How do self-issuance and authority issuance differ?
Self-issuance is where the exporter verifies origin and fills out and signs it themselves (Korea-US, Korea-EU, and so on), while authority issuance is where customs or a chamber of commerce reviews and issues it (Korea-ASEAN, Korea-China, and so on). Each agreement sets its method.
What is an approved exporter?
An exporter certified by the Commissioner of Korea Customs Service or a customs office head as capable of managing origin, who receives self-issuance authority or simplified documentation. Under the Korea-EU FTA, only approved exporters may self-issue a certificate of origin when the export value per shipment exceeds 6,000 euros.
Can I recover the FTA duty if I did not claim it at import?
Within one year from the date the import declaration is accepted, in Korea you can apply for retroactive application of the preferential rate and claim a correction of the duty already paid. It only holds if you file within the certificate of origin's validity period.
