Trump Administration Imposes New Section 232 Duties on MHDVs

If you’ve ever wondered what keeps America moving, the answer is: trucks. (And coffee. But mostly trucks.)
Medium- and heavy-duty vehiclesthink box trucks, dump trucks, and the Class 8 rigs that haul basically
everything you’ve ever bought onlinesit at the center of U.S. logistics, construction, and emergency response.
Now they’re also at the center of U.S. trade policy.

In October 2025, the Trump Administration imposed new Section 232 duties on
medium- and heavy-duty vehicles (MHDVs), certain medium- and heavy-duty vehicle parts (MHDVPs),
and buses. The headline numbers are simple: 25% on most covered trucks and key parts,
10% on buses. The real-world impact, however, is anything but simplebecause the policy blends
tariffs with content calculations, special treatment under USMCA, and a five-year “import-adjustment offset”
that works like a carrot next to the tariff stick.

This article breaks down what changed, who’s affected, how the duties are applied, and what companies can do
(legally and smartly) to keep costs predictable. No panic-buying forklifts required.

What Just Happened: The New 232 Duties in Plain English

The new policy creates a tariff program for covered products imported into the United States:

• 25% ad valorem duty on covered MHDVs and specified MHDV parts (MHDVPs).
• 10% ad valorem duty on buses (including school buses, transit buses, and motor coaches) and certain related vehicles.
• Effective date: applies to covered goods entered for consumption (or withdrawn from warehouse) starting November 1, 2025.

These duties are not a “price suggestion.” They’re collected at the border, typically paid by the importer of record,
and they immediately change landed costoften by enough to turn a “reasonable quarter” into an “explain this to the board”
quarter.

Section 232 Refresher: Why This Law Has So Much Bite

Section 232 of the Trade Expansion Act of 1962 lets the President adjust imports that are foundafter a Commerce Department
investigationto threaten U.S. national security. The key detail is that “national security” here is not limited to
tanks and missiles. It can include industrial capacity, supply chain resilience, and the ability to ramp production
during emergencies.

The usual workflow goes like this: Commerce investigates → issues a report and recommendations → the President decides whether
to act. That structure is why Section 232 actions tend to arrive with a formal proclamation and a compliance trail that
importers have to follow precisely. If you’re the person who manages classifications, entries, or broker instructions:
congratulations, you now have a new recurring nightmareexcept this one comes with spreadsheets.

What Counts as an MHDV, an MHDV Part, or a Bus?

“MHDV” is a wide umbrella. Practically, it captures many vehicles in the medium- and heavy-duty ranges used for freight,
specialized work, and logistics. You’ll often see the covered population discussed as Class 3 through Class 8 vehicles
in industry terms.

Common MHDV examples

• Medium-duty box trucks and delivery trucks
• Heavy-duty tractors (Class 8 “semi” tractors)
• Dump trucks, cement mixers, refuse trucks, tow trucks
• Special-purpose trucks and chassis used for vocational builds

Common MHDV parts (MHDVPs) that get attention

Parts coverage can be the real cost driver because modern trucks are essentially rolling supply chains: engines,
transmissions, axles, tires, chassis components, powertrain pieces, and electrical systems often cross borders multiple times.
The tariff program focuses on “key” parts specified on an official list, and it includes a mechanism to expand coverage to
additional parts if agencies believe circumvention is happening.

Buses are treated differently

Buses get a 10% duty rate rather than 25%, but they don’t benefit from some of the content-based relief described below.
That matters for school districts and transit authorities that buy through long procurement cyclesbecause tariffs are not
known for respecting your budget calendar.

The Mechanics: When the Duty Applies and How It’s Calculated

The new duties apply to covered products based on their tariff classification and inclusion on the designated lists
(often referenced by Harmonized Tariff Schedule headings and special Chapter 99 reporting lines). In other words:
“It’s a truck” is not a legal standard; “it’s in the specified tariff scope” is.

USMCA treatment for certain MHDVs: the “non-U.S. content” concept

Here’s one of the biggest practical twists: for certain MHDVs that qualify for preferential treatment under
the United States–Mexico–Canada Agreement (USMCA), the policy allows a method to apply the 25% duty
only to the non-U.S. contentafter documentation and a process run through Commerce.

Think of it like a split bill at dinner: if the truck has documented U.S. content, the tariff applies only to the portion
that isn’t U.S. content. That’s still potentially expensive, but it shifts the incentive strongly toward U.S. value-add.

USMCA treatment for parts: a “not yet” rule (with an important exception)

For individual MHDV parts that qualify for USMCA, the policy creates a temporary pause: those parts are not subject to the new
additional duty until Commerce and Customs establish a method to apply the tariff exclusively to non-U.S. content.
Translation: the government doesn’t want to apply the 25% in a way that unintentionally taxes U.S. content inside a part,
but they also don’t want to leave the door open forever.

The exception: knock-down kits (or similar parts compilations) remain subject to the additional duty
even if they otherwise appear USMCA-eligible. That’s a direct anti-circumvention moveaimed at preventing “import a kit,
tighten some bolts, call it local” strategies.

Don’t miss the enforcement teeth

The program also includes enforcement provisions tied to content declarations. Overstating U.S. content can trigger the
full duty rate on the full value of the vehicle, plus broader consequences for similar imports until compliance is verified.
In plain terms: if you’re going to claim content, you need the receiptsand a process that survives an audit.

The Five-Year Import-Adjustment Offset: A Tariff… Coupon?

Tariffs are usually all stick. This one comes with a structured carrot: an import-adjustment offset
for manufacturers that assemble MHDVs in the United States. The offset is designed around a specific policy target:
reducing duties on parts that account for about 15% of an assembled truck’s value during the 2025–2030 window.

The key number is 3.75%. Eligible manufacturers may apply for an offset amount equal to
3.75% of the aggregate value of all MHDVs they assemble in the U.S. (as determined annually)
from November 1, 2025 through October 31, 2030. The logic is math-based: 25% duty applied to 15% value equals 3.75%.

What the offset can be used for

• Offsetting certain tariff liability related to the manufacturer’s covered MHDV parts imports (within defined program limits).
• Supporting a U.S. assembly strategy while still allowing some imported parts flows.

What the offset can’t do

• It isn’t a blank check to erase all tariffs across all products.
• It generally does not apply to knock-down kits or equivalent parts compilations.
• It doesn’t make compliance optional; it makes assembly strategy more financially tolerable.

A simple example (hypothetical numbers)

Suppose a manufacturer assembles $2 billion worth of qualifying MHDVs in the U.S. in a year. An offset of 3.75% would equal
$75 million. That offset could then be used (through the authorized importer-of-record structure) to reduce eligible tariff
liability on covered imported parts tied to that manufacturer’s program participation. Your mileage may varyespecially if your
“mileage” is measured in compliance paperwork.

Who Feels the Impact: OEMs, Suppliers, Importers, Fleets, and Public Buyers

1) OEMs and final assemblers

OEMs face the biggest strategic question: what is the “right” production footprint now that importing a covered truck can carry
a 25% duty? For some product lines, the answer could be more U.S. assembly and localization; for others, it may be pricing changes,
configuration shifts, or changes to sourcing that increase U.S. content to reduce exposure under the USMCA non-U.S.-content approach.

2) Tier suppliers and parts makers

Suppliers get hit from both directions: (a) direct duties on specified parts, and (b) customer pressure to re-source,
re-price, or re-engineer. Expect a surge in “Can we dual-source this?” conversations and a new appreciation for boring components
like castings and fastenersbecause when policymakers talk about “industrial base,” they mean the whole iceberg, not just the shiny cab.

3) Importers of record and customs teams

The importer-of-record role becomes higher-stakes. Classification, entry reporting, foreign trade zone treatment, and documentation
of content claims all matter more. If your compliance process used to be “We’ll fix it next quarter,” congratulations: it’s now “We’ll fix
it before CBP fixes it for us.”

4) Fleets, contractors, and bus buyers

Fleet operators may see higher acquisition costs and longer lead times if manufacturers shift production plans. Public buyers
(school buses, transit buses) can face procurement disruptions, since bus duties apply at a different rate and may not benefit from
content-based relief in the same way. When budgets are set years in advance, “surprise 10%” is not a fun surprise.

Tariff Stacking, Interactions with Auto Tariffs, and the “Choose Your Lane” Parts Rule

One of the most technicalbut importantfeatures is how these duties interact with other trade measures.
The program is designed to live alongside existing tariff regimes, including prior Section 232 actions on automobiles and auto parts.

There is also a notable concept for certain parts: under defined conditions, an importer of record may be able to declare a part
as subject to the automobile parts tariff framework or the MHDV parts frameworkdepending on classification status and use in U.S.
production or repair activity, supported by certifications. This is not a “pick whichever is cheaper” loophole; it’s a controlled
alignment mechanism intended to avoid odd gaps or overlaps in parts administration.

Practically, companies should treat this as a strategy project, not a last-minute broker instruction. If you want the flexibility,
you’ll need internal controls that can explain (and document) why a part was reported the way it was.

Customs & Compliance Checklist: What to Do Before Your Next Entry

If you import covered trucks, parts, or buses, here’s a practical checklist to reduce surprises:

1) Confirm scope with classification and official lists

• Map your vehicles and parts to HTS classifications.
• Confirm whether they’re in-scope based on the designated lists and Annex-style references.
• Update broker instructions and internal product masters.

2) Prepare for Chapter 99 reporting and entry mechanics

• Ensure entry systems can report the required Chapter 99 lines for the new program.
• Train teams on when additional lines apply and when exemptions apply (e.g., older vehicles).

3) Build a defensible USMCA content story (if applicable)

• For USMCA-qualifying MHDVs, develop a model-level U.S. content documentation process.
• Align finance, sourcing, and trade teams on how content values are calculated and supported.
• Plan for audits: treat content claims like tax positionsdocumented and reviewable.

4) Review foreign trade zone strategy

If you use FTZs, note that covered goods admitted to zones after the effective date can face special status requirements.
FTZ strategy can still matter, but it must match the new rules.

5) Evaluate drawback and recovery options carefully

For some companies, manufacturing drawback may still be relevant depending on facts and program rules. The point isn’t
“tariffs are refundable” (they often aren’t in the way people hope); the point is to understand which recovery paths are available
and which are explicitly restricted.

Market and Supply Chain Effects: What This Policy Is Trying to Achieve

The Administration frames these duties as national-security-oriented industrial policy: stabilize domestic production,
strengthen supply chains, and support defense readiness by protecting the ability to produce key vehicles and components at home.
The explicit incentives (content-based treatment and offsets) reinforce that the target outcome isn’t simply fewer importsit’s more
U.S. value creation.

In the short term, tariffs can raise costs and drive contract renegotiations. In the medium term, they can accelerate
localization, supplier reshoring, and investment in U.S. assembly and component capacity. In the long term, outcomes depend on whether
the domestic supply base can scale at competitive costbecause trucks may be patriotic, but they still have to pencil out.

What to Watch Next

• Commerce guidance on parts: the process for applying the duty only to non-U.S. content for USMCA-qualifying MHDV parts.
• Scope expansion: the mechanism to add additional parts if the government sees circumvention or evolving risk.
• Implementation updates: CBP guidance bulletins, reporting instructions, and compliance interpretations.
• Commercial response: new sourcing contracts, U.S. capacity announcements, and pricing adjustments across fleets and public procurement.

Conclusion

The new Section 232 duties on MHDVs are more than a tariff headline. They’re a full trade program with rates, scope definitions,
USMCA-linked content mechanics, and a five-year import-adjustment offset aimed at rewarding U.S. assembly. For importers and manufacturers,
the biggest risk isn’t just paying 25%it’s misclassifying, misunderstanding eligibility, or treating documentation like an afterthought.

The best response is disciplined and unglamorous: build a clean product scope map, get your entry mechanics right, and create a
defensible content and sourcing strategy. Tariffs are stressfulbut preventable chaos is optional.

Field Notes: What Companies Are Experiencing (Extra )

The first few weeks after a major tariff change are rarely elegant. What you typically seebased on common themes reported by
manufacturers, brokers, and supply-chain teamsis a mix of urgent problem-solving and “How did we not know this was in our parts list?”
moments. Here are several real-world-style scenarios that have become especially common with the new Section 232 duties on MHDVs.

1) The “classification scramble” is back (and it brought friends)

Many companies start by assuming the duty applies only to fully built trucks. Then someone remembers the imported axles,
transmissions, or specialty chassis components. Suddenly, the trade compliance inbox becomes a museum of frantic messages:
“Is this part in scope?” “Which HTS line do we use?” “Why is there a Chapter 99 number on my screen?” This scramble isn’t just
administrativeclassification decisions can move real dollars, and they can trigger penalties if reported inconsistently.

2) USMCA content becomes a data project, not a buzzword

If you want to benefit from the “non-U.S. content” approach for eligible MHDVs, you need a clean story about where value is created.
That usually means building a model-level data room: bills of materials, supplier origin statements, manufacturing steps, and a consistent
method for assigning value to U.S.-based activity. The companies that do this well treat it like a cross-functional project with finance,
sourcing, manufacturing, and compliance at the same table. The companies that don’t… learn very quickly that “We think it’s mostly U.S.”
is not a compliance strategy.

3) Pricing negotiations get weirdly specific

Tariffs force awkward conversations: Is the duty included in price? Who is importer of record? What’s the Incoterm? Who pays if the
scope changes and a part gets added later? Buyers start asking for line-item transparency. Sellers start asking for change-order clauses.
If you ever wanted to watch grown adults debate the phrase “landed cost,” this is your season.

4) The offset becomes a planning toolif you can actually use it

For manufacturers with U.S. assembly, the import-adjustment offset can influence sourcing choices. Some teams run scenarios like:
“If we keep importing this component, do we have offset capacity to soften the impact?” Others use the offset conceptually as a bridge
while suppliers qualify U.S. production. But the biggest lesson is operational: an offset only helps if your importer-of-record setup and
documentation are buttoned up. Otherwise, it’s like having a coupon you can’t scan at checkout.

5) Public buyers feel the timing pain

School districts and transit agencies often buy buses through long bids and tight fiscal windows. When a 10% duty arrives, it can hit
right between award and delivery, or between budgeting and contracting. The practical result is renegotiations, delayed deliveries, and
“value engineering” discussions that nobody enjoys. In some cases, agencies respond by shifting procurement timing, seeking alternative
configurations, or prioritizing suppliers with more U.S.-based production footprints.

6) Everyone updates their “watch list”

Finally, companies build a watch list for future moves: guidance updates, changes to parts coverage, and new reporting instructions.
The smart teams don’t just reactthey set up internal checkpoints (monthly or quarterly) to review imports, supplier changes, and whether
any products might newly fall into scope. Because if trade policy has taught us anything, it’s that “set it and forget it” is only valid
for rotisserie chicken.

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