1. The choice in practice
Korea is a member of both the China-Korea FTA and RCEP. For any given product, you may have two preferential routes and two different rates.
Most of the time the bilateral agreement wins, because its tariff reduction schedule started earlier and goes deeper. But not always, and the exceptions are where money is left on the table.
The only reliable method is to look up the rate for the specific HS line and destination, year by year.
2. Where to look
China’s Ministry of Commerce maintains a Free Trade Area Service Network with an agreement tariff rate query. You enter the commodity code and the destination country and it returns the relevant rates for the agreements in force.
Similar tools exist on the Korea Customs Service side and on commercial tariff databases.
Use a current-year source. Both agreements phase tariffs down on 1 January, so last year’s figure can be wrong in either direction.
3. The comparison that matters
For a product entering Korea, three figures are relevant: the MFN rate, the China-Korea FTA rate, and the RCEP rate.
Three outcomes are possible.
The bilateral rate is lower. Use the China-Korea certificate.
The RCEP rate is lower. Use the RCEP certificate.
Both are equal, often because both are zero. Then the decision turns on origin rules and administrative convenience rather than rate.
The third case is more common than people expect for industrial goods. It is also where exporters default to the bilateral certificate out of habit, which is fine, provided the origin determination actually holds.
4. The origin rule comparison
Rate parity does not mean the routes are equivalent. The origin rules differ, and one may be satisfiable while the other is not.
RCEP’s cumulation covers fifteen economies. Material originating in Japan, Australia, New Zealand or an ASEAN member can count toward the regional value content calculation under RCEP. Under the bilateral agreement, cumulation is limited to the two parties.
For a product assembled in China from Japanese components, this can be decisive. A calculation that yields 32 percent under the bilateral rules may exceed 40 percent under RCEP, purely because the Japanese material is counted differently.
The practical test is straightforward: if a significant share of your inputs comes from RCEP members other than Korea, run the RCEP calculation before assuming the bilateral route is available.
5. Reading the Korean schedule correctly
Korean tariff lines are subdivided more finely than the six-digit HS level. A Chinese ten-digit code will not map directly.
The rate query tools usually handle the mapping. Where the query returns multiple Korean lines for one Chinese code, the product’s specific characteristics determine which line applies.
This is where description specificity on the certificate matters. If the certificate says “other” and the Korean schedule distinguishes by end use, the importer’s declaration will need to pick one, and the officer will ask why the certificate does not.
6. A worked example of the calculation
Take a product with an FOB value of USD 100,000.
Imported components from Japan, CIF value USD 35,000.
Imported components from Thailand, CIF value USD 15,000.
Chinese materials and processing USD 50,000.
Under the China-Korea FTA, both the Japanese and Thai material are non-originating. Non-originating value is USD 50,000, giving a regional value content of 50 percent.
Under RCEP, if the Japanese and Thai materials hold RCEP originating status, both count as originating. Non-originating value is zero, and the calculation passes comfortably.
Both routes work here. But if the Japanese component were larger, the bilateral calculation could fall below threshold while RCEP still passed. That is the scenario the comparison is for.
7. Filing distinctions
The certificates are different formats. The China-Korea FTA certificate is not interchangeable with the RCEP certificate, and neither is interchangeable with Form E.
The origin criterion codes differ between agreements. Copying a code from one agreement’s certificate to another is a common error and produces a defective certificate.
Transport rules also differ in detail. Korea-bound goods transiting a third country need documentation showing the transit was for transport purposes only. The requirements are similar across agreements but not identical.
8. Closing view
The Korea market rewards a systematic approach more than most. Two agreements, phased schedules, and a schedule that changes every January.
An exporter who checks the rate once, when the customer is first onboarded, and never again, will be using a figure that has drifted.
*This article is based on the China-Korea FTA and the Regional Comprehensive Economic Partnership as published by China’s Ministry of Commerce Free Trade Area Service Network. Rate queries should use current-year data.*