In our last issue, on the 10% surcharge that expired July 24, we flagged one thing forming behind it as the quiet danger — a tariff aimed at plastics and chemicals that isn't in the headlines yet. Here is the full picture, and it is now close: a proposed rate is expected any day.

The important reframe first: this is not one case about one product. It is a tariff being built around whole industries — and most of the importers who would be hit do not know they are in scope, for two reasons. The government named their sector, not their product code. And there is no rate yet to react to. That absence — and the fact that it is about to end — is exactly why now is the time to look.

What "excess capacity" means, and why it lands on plastics and chemicals

The government's theory, in plain terms: some countries — China first among them — built far more factory capacity than the world needs, kept it running with subsidies and cheap state lending, and sell the surplus abroad below what it costs to make. This investigation, run under Section 301 of the trade law, is the tool to tax that surplus. The notice's own definition is capacity "sustained through governmental interventions… incentivizing companies to maintain or grow their unused capacity inefficiently" (Federal Register 2026-05214, March 17 2026).

Plastics and chemicals are not incidental to this — they sit at the center of it. The notice gives an illustrative list of 21 sectors "plagued by excess capacity," and both plastics and chemicals are named. It goes further country by country: China's surplus is described as led by plastics and organic chemicals, with PET singled out; the EU, Germany, Singapore, Switzerland, Korea, and India all draw chemicals or petrochemicals citations. If you import these products, the theory of the case already points at you.

One legal detail decides how easily this becomes real. It is run under what the statute calls the "unreasonable" standard — the government does not have to prove a broken treaty, only that a practice is "unfair and inequitable." That is a lower bar than the 2018 China case, which was built on intellectual-property theft. A lower bar means a determination is easier to reach.

Are you in scope?

Start with the map. The investigation covers 16 economies: China, the European Union, Vietnam, India, Indonesia, Thailand, Korea, Japan, Taiwan, and Mexico — plus Singapore, Switzerland, Norway, Malaysia, Cambodia, and Bangladesh. If you source plastics or chemicals from any of them, you are potentially in scope.

Here is the part that catches people, and it is the whole reason this is worth your attention before a rate exists: the notice draws its line by sector, not by tariff code. There are no HS numbers anywhere in it. So the reassurance you would normally reach for — "my product's code isn't on any list" — gives you nothing here. There is no list yet. When one comes, it will be built out of a sector the government has already named. Your industry being named is the signal; your code not being on a list is not safety.

So the honest test for whether it is you has two steps. First: do you import anything in the plastics or chemicals family — resins, intermediates, finished formulations — from any of the 16 economies? Second: if yes, you are in the pool the eventual product list will be drawn from. There is no finer filter available today, and that is precisely the point of watching now rather than waiting for the list to tell you.

This is also what a standing watch is for. A single importer sees only their own products and their own suppliers. We watch every forming action across all 16 economies at once — so we can tell you your category is being targeted before the rate that makes it official ever appears.

How big, and how soon

How big. No rate has been proposed, so any number today is a comparison, not a forecast — and we will label it that way. The useful comparison is the 2018 China tariffs, which ran on the same statute. Plastics and chemicals sat on that action's List 2, at 25%. Across all four of those lists, the rates ran 10% to 25%, with 25% the serious-case number. So if this follows the 2018 template, the precedent band is 10–25% — and this exact basket last landed at the top of it. Read that as a calibrated comparable, not a prediction.

How soon. Soon. USTR ran a second round of comments and a second hearing in early July and, by trade-press accounts, aimed to be ready to act by around July 24 — the day the 10% surcharge expired. As of this writing it has not yet published its findings or a proposed rate, but both are described as imminent, expected within days. There is also a hard legal backstop that is not in doubt: the government must decide within 12 months of starting, which puts the outer limit at roughly March 2027. So: a proposed action expected now, a legal deadline of next March — and a window to prepare that is measured in days, not months.

Will it actually happen? Reaching the hearing stage is not a guarantee of duties. The government has proposed Section 301 tariffs before — on foreign digital taxes a few years ago — and then suspended them to zero and dropped them in a negotiation. But those cases turned on a single policy a country could repeal to make the tariff go away. Overcapacity has no such single fix, which points toward action rather than a settlement. The honest read: likely to produce something on China, where every Section 301 case has ended in a remedy; more genuinely negotiable for the economies that have live trade talks with the US — the EU, Japan, Korea, Mexico, India. Either way, the direction is set. The question is when, and how much — which is why preparation beats reaction here.

The pattern behind it: the duty is chasing the production

Look at the list of 16 again and one thing stands out. Vietnam, Thailand, Malaysia, Indonesia, and Cambodia are on it — the very countries production moved to after the first China tariffs. That overlap is unlikely to be chance. When tariffs hit China in 2018, a lot of final assembly relocated into Southeast Asia under the "China-plus-one" strategy, while the upstream Chinese material often stayed Chinese. Our read: the capacity moved, and now the tariff is following it.

There is a vivid, documented version of this. When China banned imports of plastic waste in 2018, that trade re-routed to Malaysia, Vietnam, and Thailand almost overnight — the trade going wherever the door was still open. (To be precise, that was the recycling trade, not virgin resin — but the mechanism is the one that matters here.)

The lesson, which we will return to in a future issue: the duty follows the factories. Moving your sourcing to escape a tariff buys time, not immunity — because the remedy tends to arrive wherever the production went.

How to get ahead of it

There is no action at the customs line today, because there is no rate. But there are three things the companies that will not be caught unprepared are doing now.

Map your exposure before there is a rate. Which of your products come from which of the 16 economies. Do it now, so the day a proposed list publishes, your exposure is a number you already have rather than a scramble.

Know that the live window is the remedy comment period, and it is about to open. The windows to comment on the investigation have closed — an initial round (comments April 15, hearing in May) and a second round (comments July 6, hearing July 7–9). But when USTR proposes an actual remedy, with product lists and rates attached, it typically opens a new comment period on that remedy. That is your real opportunity to argue your product off the list or to shape the rate — and with a proposed action expected within days, that window is nearly here. Be ready to file the day it publishes, not to start preparing then.

Watch for an exclusion process. The 2018 China tariffs let importers petition to have specific products excluded. Whether this action will offer the same is unknown — there is no remedy yet — but it is the precedent to watch for, and the case for your product is better made early.

What would change this read

A few things could. The investigation could close with no action — less likely now that hearings are done, but the digital-tax cases prove it is possible. The rate could land low enough to be a nuisance rather than a burden. Or the economies with live trade talks could negotiate their way out even if China does not. Watch the proposed-action notice above all — it is the moment this turns from forming to real.

The Docket — and what's next

The dates that matter: USTR aimed to be ready to act by around July 24, and a proposed rate is now expected within days; the hard legal deadline is roughly March 2027. Alongside it, the standing pipeline runs — the separate forced-labor 301 (rates of 10% and 12.5% proposed in June, two hearings held, no final decision yet) and antidumping orders coming due for their five-year reviews. (One case that was on this list has come off it: the glyphosate-from-China petition was withdrawn by its own filer on July 17 after farm-group pushback — a reminder that not every case that opens becomes a duty.)

This is what the Pipeline is for: surfacing the forming action while there is still time to prepare, not reporting the duty after it lands.

Next issue: the case that shows why your product's code does not decide whether you owe a duty. US steel finished in Thailand from Chinese material — and the government's move to decide it still counts as Chinese. If you have ever been told "we moved finishing offshore, so you're clear," that one is for you.

Analysis of the public record, not legal advice — confirm anything operative with your licensed customs broker or trade counsel. Scope, sectors, economies, and dates are sourced to the Federal Register initiation notice (2026-05214) and USTR; rate comparisons reference the published 2018 Section 301 actions and are labeled as comparisons, not forecasts.