RCEP: Full Cumulation Rules of Origin — How Vietnamese Businesses Can Restructure Asian Supply Chains

The direct answer: the Regional Comprehensive Economic Partnership (RCEP) — in force for Vietnam from 1 January 2022 — delivers its biggest benefit not through tariff cuts (Vietnam already had FTAs with most members) but through a single HARMONISED set of rules of origin (ROO) for the whole bloc. Instead of juggling 14 different rulebooks from bilateral and ASEAN+1 FTAs, businesses need only one: RCEP Chapter 3. The core is three criteria — 40% regional value content (RVC), change in tariff classification (CTC), and the chemical reaction rule (CR) — plus full cumulation: materials or processing from ANY RCEP member state count toward origin. It is an Asian supply-chain restructuring tool many Vietnamese businesses have yet to fully exploit.

RCEP’s three origin criteria (Chapter 3, Article 3.2)

A good qualifies as RCEP-originating if it falls in one of three groups: (1) wholly obtained or produced in a Party (agricultural goods, minerals, seafood and the like); (2) produced in a Party exclusively from originating materials of one or more Parties; or (3) produced in a Party from non-originating materials but meeting the product-specific rule (PSR) in Annex 3A. For group (3), the PSR lets the producer choose among three tests: RVC of at least 40% (computed by the deduction or build-up formula on the FOB price), a change in tariff classification at the prescribed HS level, or the chemical reaction rule (applying only to Chapter 29 organic chemicals and Chapter 38 miscellaneous chemicals — note: dissolving or recrystallisation does not count as a chemical reaction). The 40% RVC threshold is considered low and stable compared with many FTAs — an easier “ticket” to preferential tariffs.

Full cumulation: the supply-chain restructuring weapon

Cumulation is the strongest feature: Thai-origin materials, Malaysian processing, final assembly in Vietnam — all stack toward the 40% RVC, and the finished good exported to Japan, Korea, China or Australia still enjoys RCEP preferences. A practical example: a Vietnamese furniture maker exporting to Japan — New Zealand timber, Chinese hardware, Vietnamese processing: if total regional content reaches 40% of FOB, the product qualifies as RCEP-originating without every input being “purely Vietnamese”. Compare: the EVFTA demands fabric-forward for textiles, the CPTPP demands three-stage yarn-forward — RCEP is far more flexible thanks to bloc-wide cumulation. The strategy for businesses: re-map the entire imported-input list and gradually shift sourcing inside the RCEP bloc to “collect” RVC.

Differences from EVFTA/CPTPP/UKVFTA and practical notes

First, RCEP does not replace bilateral FTAs — businesses may CHOOSE the most favourable agreement per shipment (compare RCEP vs EVFTA vs CPTPP preferential rates by HS code). Second, RCEP allows broad cumulation that EVFTA/UKVFTA restrict (EVFTA cumulates only with Korea for textiles; the UKVFTA once banned EU–UK cross-cumulation). Third, on documentation: RCEP allows self-certification of origin alongside the RCEP CO form — businesses must register and keep full origin evidence because importing-country customs may verify post-clearance. Important caveat: RCEP does not offer the best rate for every product — for textiles to the EU, the EVFTA still wins; for goods to Japan/Korea, compare RCEP vs CPTPP/VJEPA line by line.