Same PVC Resin, Five Different Anti-Dumping Rates

Even Within Germany, There Are Two Different Rates

On July 10, South Korea’s Ministry of Economy and Finance announced it would impose anti-dumping duties on PVC paste resin imported from Germany, France, Norway, and Sweden. It’s a fine powder used as a raw material for synthetic leather, wallpaper, flooring, and gloves. The decision followed an investigation the Korea Trade Commission launched in August 2025 at the request of Hanwha Solutions. Most headlines simply read “up to 31.55%.”

But once you open the finalized tariff schedule, it’s not a single number. Germany’s Westlake Vinnolit (hereafter Vinnolit) and its affiliates face 31.55%, while other German suppliers face 30.60%. French suppliers, including Kem One and its affiliates, face 31.55%, Norway’s Inovyn Europe arm faces 25.79%, and Sweden’s Inovyn Trading arm faces 28.15%. The same measure, applied to the same product, splits into five different boxes depending on which company and country exported it. This duty applies for five years, from August 5 to August 4, 2031.

There are also traces of the numbers shifting. During the investigation, a provisional duty of 25.79–42.81% had been in effect since February 25, and for some suppliers the final rate came out lower than that. Importers that paid more under the provisional duty can now go through a settlement process and get the difference refunded.

If you think of an anti-dumping duty as simply “a fine for selling something too cheaply,” this table looks strange. A fine, after all, would only need one number per product. Today I want to trace why the figures differ by company, and what ledgers get compared to produce each one. I’ll also look at how this differs from the similarly named countervailing duty, and what kind of workaround a high tariff invites.

What Gets Compared Is the Export Price Against That Company’s Home-Market Price

Let’s start with the definition in Article 2.1 of the WTO Anti-Dumping Agreement. A product is considered dumped if its export price is lower than the normal price at which the same product is traded for consumption within the exporting country. The benchmark isn’t the price in our market — it’s the price the same company charges at home. Korea’s Customs Act, Article 51, follows the same structure. If an investigation confirms that a foreign product entered the country at or below its normal value¹ and caused material injury to domestic industry, an additional duty can be imposed up to the amount of the dumping margin² — the gap between the normal value and the dumping price. The regulation also requires the supplier or the supplying country to be specified alongside the product.

The answer is already built into this definition. Since what’s being compared is “what the company sells for at home” versus “what the company sells to us,” the calculation has to be done company by company. Even if two German companies sell to Korea at the exact same price, the one that was charging more inside Germany ends up with a bigger margin.

The actual calculation takes far more work than the definition suggests. If domestic sales are nonexistent or too thin for comparison, Article 2.2 allows using the price exported to a third country instead, or constructing a value by adding administrative and selling costs plus a reasonable profit margin to the cost of production. Domestic sales made below cost can, if certain conditions are met, be treated as not made in the ordinary course of trade and excluded from the calculation. And if the export price can’t be trusted because the importer is an affiliate, it’s calculated backward from the price at which the goods were first resold to an independent buyer (Article 2.3).

Next comes the fair comparison (Article 2.4). It’s usually aligned to the ex-factory stage, and transactions from roughly the same period are matched against each other wherever possible. Differences that affect price comparability — sales terms, taxes, level of trade, quantity, physical characteristics — are adjusted for one by one. Something as small as how freight is handled or what the payment terms are can shift the normal value or the export price. So the outcome depends as much on how each company sold its product and kept its books as it does on the nature of the product itself.

Investigated vs. Uninvestigated Companies

Article 6.10 of the Agreement lays out the basic rule: investigating authorities must calculate an individual dumping margin for every known exporter and producer. But if there are too many companies to examine one by one, the authority can narrow the scope to a statistically valid sample or to the companies accounting for the largest export volumes.

Companies left out of that scope fall under Article 9.4. The duty assessed on them cannot exceed the weighted-average dumping margin of the companies that were actually investigated. When calculating that average, companies with a zero or de minimis margin³, and companies assigned a rate based on facts available⁴ because they failed to submit data, are excluded from the count. This is generally how the “all others” row in a tariff schedule gets built.

The structure comes into sharper focus when you look at a case where Korean firms ended up on the receiving end. On March 28, 2025, the U.S. Department of Commerce issued its final antidumping determination on epoxy resins from Korea. The period of investigation ran from April 2023 to March 2024, and the two companies individually examined were Kumho P&B Chemical and Kukdo Chemical. Commerce treated Kukdo Chemical and Kukdo Fine Chem as a single company for calculation purposes. The margins determined were 7.60% for Kumho P&B Chemical and 5.68% for Kukdo Chemical. All other, uninvestigated Korean producers received a rate of 6.37% — the weighted average of the two companies’ margins, using publicly rangeable sales figures as weights.

Same Korean epoxy resin, yet three different numbers. The issues list appended to the determination hints at where the differences come from: a transportation-cost calculation error at Kukdo Chemical, a dispute over whether Kukdo Fine Chem’s ocean freight should be treated as a won-denominated cost, and a question of whether Kumho P&B Chemical’s inventory valuation losses should be folded into its cost of production. There was also an argument that, because feedstocks Bisphenol A and Epichlorohydrin had gotten cheaper due to overproduction in China, the cost basis should be adjusted upward. The few percentage points separating these rates are the accumulated result of exactly this kind of line-item dispute.

If You Don’t Submit Data, Someone Else Decides Your Number

There’s another reason the numbers differ from company to company: how much a company cooperated with the investigation.

Article 6.8 of the Agreement allows authorities to make determinations based on “facts available” when an interested party fails to provide necessary information within a reasonable period or significantly impedes the investigation. This includes the data submitted by the domestic industry when it files for an investigation. Annex II of the Agreement states plainly that if information is withheld due to non-cooperation, the outcome may be less favorable than if the party had cooperated.

That’s why answering a questionnaire in an anti-dumping investigation is more than paperwork. For an exporting company, this is where it gets decided whether its own tariff rate will be calculated from its own books, or from data submitted by the other side. That said, cooperating with the investigation and contesting it point by point isn’t free, either. For a small exporter short on both data and manpower, the choice itself is a burden.

Korea’s tariff schedules reveal another mechanism. Looking at the appendix to the 2022 proposed rule imposing duties on polyamide film from China, Thailand, and Indonesia, a footnote states that “other suppliers” affiliated with a named supplier are subject to that affiliate’s tariff rate. This preemptively blocks the route of rerouting goods under the name of whichever affiliate has the lower rate.

In the PVC case, why the named company Vinnolit (31.55%) ended up with a higher rate than Germany’s “other suppliers” category (30.60%) can’t be determined from the finalized tariff schedule or press coverage alone. The basis for the calculation has to be confirmed in the Trade Commission’s final determination resolution.

Countervailing duties look at the government’s money, not the company’s price

Countervailing duties, often mentioned in the same breath, start from a different place. According to the definition compiled by e-Nara Index, Korea’s government statistics portal, based on the Trade Commission’s operations handbook and other sources, anti-dumping duties are imposed when an export price lower than the normal price in the exporting country—dumping—causes injury to the importing country’s industry. Countervailing duties are imposed, within the scope of the subsidy, when a government subsidizes an industry or individual company in the exporting country, boosting the competitiveness of its exports and causing injury as a result.

Anti-dumping scrutinizes a company’s pricing behavior; countervailing duties scrutinize a government’s support. That’s why, in countervailing duty investigations, the government itself becomes a party under investigation. Dumping and subsidies can exist at the same time, so both duties sometimes get attached to the same product.

That’s exactly what happened with epoxy resin. The U.S. Department of Commerce issued its final countervailing duty determination around the same time, setting subsidy rates at 1.01% for Kukdo Chemical and 1.84% for Kumho P&B Chemical. And when it set the cash-deposit rates for the anti-dumping duty, it subtracted the portion already offset by export subsidies, adjusting the rates to 7.59% for Kumho P&B Chemical, 5.62% for Kukdo Chemical, and 6.33% for all other companies. Export subsidies can push down export prices and thus already show up in the dumping margin—so this adjustment exists to avoid counting the same cause twice.

The higher the tariff, the more tempting it is to rename the goods

The numbers differ from company to company, but when they run into the tens of percent, people start looking for ways around them. In the cases Korea has made public, the main tricks were relabeling products or disguising their country of origin.

Starting in April 2025, Chinese steel plate (hu-pan, heavy steel plate used in shipbuilding and construction) has carried provisional anti-dumping duties of 27.91–38.02%, depending on the supplier. In response, some importers painted the surface of the plate and declared it as color-coated steel sheet, which carries no tariff. The Korea Customs Service said that over a 100-day period starting that April, it ran a dedicated anti-dumping inspection task force and caught 19 companies doing this, involving ₩42.8 billion (~$30.9M) worth of goods.

There are also cases running in the opposite direction. According to an April 2025 Korea Customs Service announcement, the United States imposes anti-dumping duties of up to 1,731.75% on Chinese mattresses. To dodge this, a company set up in Korea brought 1.2 million Chinese-made mattresses (worth ₩74 billion, ~$53.4M) into its bonded warehouse, then falsified the paperwork to pass them off as Korean-made before shipping them to the US. This was uncovered in November 2024. In effect, Korea was used as a conduit for evading another country’s anti-dumping duties.

Bonded factories⁵ deserve a more careful look. A bonded factory is a system that lets companies process imported raw materials without paying duties on them, as long as the finished goods are exported — so the mechanism itself isn’t a loophole. This same design is why a shipyard designated as a comprehensive bonded zone can build ships from Chinese steel plate and export them duty-free. The problem arises when goods processed in a bonded factory are brought into the domestic market instead of being exported. At a trade remedy event in 2022, Professor Lee Hyo-young of the Korea National Diplomatic Academy argued that this route could be used to evade anti-dumping duties and called for revising the Customs Act.

The system has been catching up, bit by bit. Since January 2025, anti-dumping duties can now also be applied to “circumvention dumping” — cases where a product’s essential characteristics aren’t changed within the supplying country, but only its form, packaging, or stated use is altered before import. In November 2025, the Korea Customs Service and the Korea Trade Commission announced they were working to expand this scope to cover assembly or completion in third countries, as well as processing in domestic bonded zones. That said, I couldn’t find any publicly disclosed enforcement case involving the bonded-factory route itself, and it still needs confirming whether the expansion to cover domestic bonded-zone processing has actually been finalized.

Oswarld’s Lens

When I read an anti-dumping tariff story, I find myself looking at the rows of the tariff schedule before I look at the “up to X%” headline. The maximum is just the number in the highest cell — whether your supplier actually sits in that row is something you only find out by opening the table.

If you’re the importer, the question shifts from “did this product get hit with a tariff” to “is our supplier named, who are its affiliates, and is there any refund owed between the provisional rate and the final rate.” Simply switching suppliers within the same country can move your cost base by several percentage points.

If you’re the exporter, answering the investigation questionnaire becomes part of your pricing strategy. Ordinary accounting habits — how you record domestic sales, allocate costs, treat freight — can come back years later as another country’s tariff rate. Reading anti-dumping duties as nothing more than a “tariff bomb” obscures all of these judgment calls.

Closing

Anti-dumping duties look like a flat fine slapped on a product category, but look closer and they’re more like an invoice calculated separately for each exporter, comparing its home-market price against its export price. Whether the company cooperated with the investigation, who its affiliates are, whether it received separate government subsidies — all of these shift that number again. It helps to think of the system as having as many different ledgers as there are rows in the tariff table; once you see it that way, it feels a lot less strange.

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💬 Did your company ever use a raw material that carried an anti-dumping duty? If so, I’m curious whether you ever checked the supplier-specific rates at the time.

📨 If a colleague in trade or procurement ever asks, “It’s the same product — why is the tariff rate different?”, send them this piece.

References & Further Reading

• WTO, Agreement on Implementation of Article VI of GATT 1994 (Anti-Dumping Agreement): The source text confirming the definitions of normal value and export price (Article 2), facts available (Article 6.8 and Annex II), individual dumping margins and sampling (Article 6.10), the cap on non-investigated companies (Article 9.4), and de minimis margins (Article 5.8).
• Korea’s Customs Act, Article 51 (Imposition of Anti-Dumping Duties), version effective October 2, 2026: The statutory basis for levying an additional duty, up to the margin of dumping, designated by supplier and supplying country.
• U.S. Department of Commerce, Certain Epoxy Resins from South Korea: Final Affirmative Determination of Sales at Less Than Fair Value, 2025: The determination memo detailing the dumping margins and cash-deposit rates for Kumho P&B Chemical, Kukdo Chemical, and other companies, the method for calculating the all-others rate, and the list of contested issues.
• International Trade Administration, Final Determinations in the AD Investigations of Epoxy Resins: A Commerce Department summary of the countervailing-duty subsidy rates and timeline for the same case.
• News1 (published via Financial News), European PVC Paste Resin Hit With Anti-Dumping Duties of Up to 31.55% for Five Years, 2026-07-10: A report laying out final rates by supplier, provisional rates, and reconciliation refunds.
• Herald Economy, Trade Commission Imposes Anti-Dumping Duties of Up to 31.55% on PVC Paste Resin From Four European Countries Including Germany, 2026-05-21: Coverage of the Korea Trade Commission’s 473rd plenary session final ruling.
• e-Nara Index, Explanation of Trade Remedy Indicators: A government reference summarizing the definitions of anti-dumping and countervailing duties, based on Trade Commission operational materials and other sources.
• National Public Participation Legislation Center, Draft Rule on the Imposition of Anti-Dumping Duties on Polyamide Film From China, Thailand, and Indonesia: The source confirming the footnote language applying affiliate rates to related-party suppliers.
• Korea Tax Times, Chinese Heavy Plate Disguised as Color-Coated Steel Imports — Customs Investigation and Referral for Prosecution, 2025-06-17
• SBS Biz, Korea Customs Service Uncovers ₩42.8 Billion (~$31 million) in Anti-Dumping Duty Evasion, 2025-08-11
• SBS Biz, Chinese Goods Relabeled as Korean-Made — A Pretext for U.S. Tariff Bombs?, 2025-04-21
• Bizwatch, Chinese Heavy Plate Tariffs and the Shipbuilding Industry, 2025-02-21: A report on the fact that shipyards in comprehensive bonded zones are exempt from duties.
• Asia Economy, Debate on Tightening Regulation of Trade-Remedy Circumvention, 2022-05-20: A report raising concerns over anti-dumping circumvention via bonded factories.
• Korea Tax Times, Stronger Crackdown Promised on Attempts to Evade Anti-Dumping Duties, 2025-11-13: Coverage of plans to expand the scope of anti-circumvention-dumping measures.

The author is Oswarld (Kwangseob Ahn). Current roles: Adjunct Professor at Sejong University, Strategy Consultant at INLEVEL9. Career, research, books, and recent work are kept current on the About page. Latest · July 2026: HEMA-2: A Consolidation-Aware Tri-Memory Architecture with Multi-Channel Scheduling for Lifelong Conversational AI.

📝 Glossary

Footnotes

1. Normal value: the price at which the same good is sold in ordinary trade within the exporting country. When there are no domestic sales, or comparison is difficult, this is replaced by the price of exports to a third country, or by a constructed value — cost plus expenses and profit. ↩

2. Margin of dumping: the difference between the normal value and the dumping price (export price). When duties are levied as a percentage, the rate is set within the range implied by the dumping margin and then multiplied by the dutiable value. ↩

3. De minimis margin: the threshold under which a dumping margin below 2% of the export price is deemed “too small,” requiring the investigation to be terminated immediately (WTO Anti-Dumping Agreement, Article 5.8). ↩

4. Facts available: the method by which authorities base their determination on whatever information they can obtain — such as the petitioner’s data — when the party under investigation fails to submit required information or obstructs the investigation. ↩

5. Bonded factory: a facility licensed to manufacture or process goods using foreign-sourced raw materials or inputs without first paying duty on them (Customs Act, Article 185). ↩