428 New Subheadings Are Coming: The HTSUS 2028 Overhaul Starts Now

The biggest rewrite of the Harmonized Tariff Schedule in six years is headed your way — and the USITC wants your input by May 18. If you import dietary supplements, vaccines, plastics, or pharmaceuticals, your classification codes are about to change. Here's what's shifting, what it means for your entries, and what you should do before the deadline hits.

Every five or six years, the World Customs Organization rewrites the rulebook. Not the tariff rates — the classification codes themselves. The system of numbers that determines which tariff rate applies, which free trade agreement qualifies, which statistical category your product falls into, and whether your entry gets flagged or sails through.

The last time this happened was 2022. Before that, 2017. Each cycle reshuffles thousands of product classifications across 212 countries. And the next one — HS 2028 — is the biggest structural overhaul in years.

On April 17, 2026, the U.S. International Trade Commission published its proposed recommendations for how the United States will implement these changes. The USITC is accepting public comments through May 18, 2026 — just two weeks from now. After that, the ITC finalizes its recommendations and sends them to the president by December 2026. The changes take effect globally on January 1, 2028.

If you think 2028 sounds far away, consider this: every binding ruling, every classification database, every automated entry system, and every FTA qualification you rely on will need to be updated. The two-year window isn't a buffer — it's barely enough time.

What's Actually Changing: HS 2028 by the Numbers

The HS 2028 amendments are the product of the WCO's 7th Review Cycle — six years of technical discussions that started in July 2019, were extended by the COVID-19 pandemic, and concluded in June 2025. The result is 299 sets of amendments that touch nearly every corner of the tariff schedule.

Here's the scale:

Don't let the modest net change fool you. Creating 428 new subheadings while deleting 172 means hundreds of products are being reclassified, split into finer categories, or moved to entirely new headings. If your product falls in any of these zones, your current HTS code may simply stop existing on January 1, 2028.

The Dietary Supplements Shakeup: New Heading 21.07

Perhaps the most consequential change for U.S. importers is the creation of heading 21.07 for dietary supplements. This is entirely new — and it resolves one of the longest-running classification headaches in international trade.

For years, dietary supplements have been a classification nightmare. Are they food preparations (Chapter 21)? Pharmaceutical products (Chapter 30)? Mixed food preparations (heading 21.06)? The answer has depended on the country, the product formulation, and sometimes the customs officer reviewing the entry. Courts in multiple jurisdictions have heard disputes over where these products belong.

HS 2028 fixes this with:

• New heading 21.07 specifically for dietary supplements
• New Notes 4 and 5 to Chapter 21 defining "dietary supplements" and "measured doses" for classification purposes
• New Note 2 to Section IV establishing that heading 21.07 takes precedence over any other heading in the nomenclature — except Chapter 30 (pharmaceuticals)

That priority note is a big deal. It means that if a product meets the new definition of a "dietary supplement" in measured doses, it goes to 21.07 — full stop. No more arguments about whether it's a food product or something else. The only exception is if it qualifies as a pharmaceutical under Chapter 30.

If you import vitamins, protein powders, herbal supplements, or any product marketed as a dietary supplement in measured doses, your classification is about to change. The global dietary supplement market is one of the fastest-growing consumer sectors, and that's a lot of entries that will need new codes.

Vaccines Get Their Own Headings

The pandemic exposed a critical gap: the HS didn't distinguish between different types of vaccines in a way that supported emergency trade facilitation. HS 2028 addresses this with a major restructuring.

Products currently classified under heading 30.02 (blood, vaccines, toxins, cultures) will be split into two new headings:

• Heading 30.07 — Vaccines for human medicine, with disease-based subheadings
• Heading 30.08 — Other vaccines, including veterinary vaccines

This isn't just administrative housekeeping. Disease-based subheadings mean customs authorities can track trade flows of specific vaccines — COVID-19, malaria, tuberculosis — in real time. During the next health emergency, governments will be able to identify supply bottlenecks and redirect shipments without the data lag that plagued the pandemic response. The WCO developed these changes through an innovative partnership with the WHO and WTO — a direct response to the lessons of 2020-2021.

For importers of biologics and pharmaceuticals, reclassification is mandatory. Every entry currently hitting 30.02 for vaccine products needs to be mapped to the new structure.

Pharmaceuticals: Subheading 3004.90.92 Splits Into Nine

Here's one that will hit a huge number of U.S. entries. The USITC is proposing to subdivide HTSUS 3004.90.92 — the catch-all "other medicaments" subheading — into nine new subheadings.

Why? Because 3004.90.92 already has more than 70 subordinate statistical provisions for specific goods, and the ITC says it's running out of room. With continuing private-sector demand for more detailed product breakouts, the Commission concluded that splitting the subheading is the only viable path forward.

If you import any pharmaceutical product currently classified under 3004.90.92, you'll need to determine which of the nine new subheadings applies. Get it wrong and you're looking at potential misclassification penalties, incorrect duty rates, and entries that don't match your binding rulings.

Plastics, E-Waste, and Environmental Goods

HS 2028 reflects a global push for environmental transparency in trade data. Key changes include:

• New subheadings for single-use plastic items — supporting policies to reduce plastic pollution and promote circular economy approaches
• Enhanced classification for recycling equipment — improving visibility of goods related to waste management and resource recovery
• Refined categories for environmentally relevant products — better data for governments tracking sustainability commitments under international agreements

For importers of plastic goods, packaging materials, or recycling equipment, these changes mean new classification codes and potentially new statistical reporting requirements. If your products contain single-use plastic components, pay close attention to the new subheading structure in Chapter 39.

Health Emergency Preparedness: PPE, Ventilators, and Diagnostics

COVID-19 taught the trade community a painful lesson: when a crisis hits, you need to know exactly what's moving across borders. HS 2028 creates new subheadings that improve visibility for:

• Ambulances and emergency transport vehicles
• Personal protective equipment (PPE)
• Ventilators and respiratory devices
• Diagnostic devices and testing equipment

These products existed before, of course, but they were buried in broader categories that made it impossible to track trade flows during an emergency. The new structure gives customs authorities — and importers — much better data granularity. It also means that future emergency tariff exemptions or trade facilitation measures can be targeted precisely, instead of relying on ad hoc product lists assembled under time pressure.

The USITC Comment Period: What You Need to Know

The USITC posted its proposed recommendations (Publication 5729) on April 17, 2026. The comment deadline is May 18, 2026. Here's what matters:

Comments must be submitted through the Commission's Electronic Document Information System (EDIS). Questions about filing can be directed to the Office of the Secretary, Docket Services Division.

This matters more than you might think. The ITC's recommendations shape the specific 8-digit and 10-digit HTS codes that determine your duty rates, FTA eligibility, and statistical reporting. The 6-digit HS level is set by the WCO globally, but everything below that is a U.S. decision — and it's open for input right now.

What You Should Do Before January 2028

Here's your action plan, starting now:

1. Audit your current classifications — Pull every HTS code you use and cross-reference it against the HS 2028 amendments. Any code in a chapter being restructured — especially Chapters 21, 30, and 39 — needs immediate attention.

2. Submit USITC comments by May 18 — If your products are affected by the proposed modifications, file your comments through EDIS. This is your best chance to influence how the U.S. implements these changes at the 8- and 10-digit level.

3. Review your binding rulings — Any CBP binding ruling that references an HTS code being deleted or restructured will need to be updated. Start the ruling request process early — CBP processing times can stretch to months.

4. Update your classification databases — If you use automated classification tools, ERP systems, or broker-maintained databases, flag the codes that will change. Don't wait until December 2027 for a last-minute scramble.

5. Check your FTA qualifications — Changes in classification can affect whether a product qualifies under a free trade agreement. A product that qualifies under USMCA today might need a different tariff shift analysis under the new codes.

6. Brief your customs brokers and supply chain partners — Make sure your broker is tracking which product lines are affected. The transition period is when misclassification risk is highest — the old codes still work today, but the planning needs to start now.

What's Coming Next

After the May 18 comment deadline closes, the USITC will finalize its recommended modifications and submit them to the president by December 2026. The president will then issue a proclamation implementing the changes, typically in the second half of 2027, giving importers a final window to prepare before the January 1, 2028 effective date.

Watch for the WCO's Correlation Tables — official mapping documents that show exactly which current HS codes convert to which new codes. These will be the essential reference for any reclassification effort. STR is also hosting a webinar reviewing the proposed HTSUS changes, which is worth attending if you want a detailed sector-by-sector walkthrough.

The Classification Clock Is Ticking

Classification changes don't just affect what number goes on your entry. They cascade through duty rates, FTA eligibility, statistical reporting, binding rulings, and every automated system in your supply chain. The last HS transition in 2022 caught plenty of importers flat-footed — entries rejected, protests filed, refunds delayed.

HS 2028 is larger in scope. With 428 new subheadings and structural overhauls in pharmaceuticals, dietary supplements, plastics, and health emergency goods, the reclassification workload is substantial. The importers who start mapping their codes now will transition smoothly. The ones who wait until Q4 2027 will be filing corrections well into 2029.

TariffLens tracks classification changes across every HTS revision and can flag which of your product codes are affected by the HS 2028 amendments — so you're not manually cross-referencing 299 sets of changes against your product catalog.

This article is for informational purposes only and does not constitute legal, tax, or customs advice. Consult a licensed customs broker or trade attorney for guidance specific to your situation.