Motorafgiftskompensationen på 3.75 %: En sjælden fordel for importører af autodele
For most companies moving auto parts and engine components across the Pacific, the last two years of Section 232 tariff activity have felt like a one-way street: new tariff lines added, new inclusion windows opened, and duty bills that only ever seem to climb. So when the U.S. Department of Commerce published a notice on July 28, 2026 extending the import adjustment offset program to domestic engine manufacturers, it caught the attention of nearly everyone in the automotive supply chain — importers, customs brokers, and freight forwarders alike. For once, the news wasn’t about a new tariff. It was about a mechanism that lets qualifying manufacturers claw some of that duty burden back.
This article breaks down what the 3.75% engine offset actually covers, how it fits into the broader Section 232 auto tariff structure, who benefits, and — just as importantly — what it means for the logistics and customs planning that importers and freight forwarders need to get right in the months ahead.
Where the Offset Came From
To understand the engine offset, it helps to remember where the original offset program started. Back on April 29, 2025, the White House issued a proclamation adjusting how Section 232 tariffs apply to imported automobile parts. Under that proclamation, automakers assembling vehicles in the United States became eligible for an import adjustment offset equal to 3.75% of the aggregate Manufacturer’s Suggested Retail Price of vehicles built domestically between April 3, 2025 and April 30, 2026. The rate was designed to step down to 2.5% for the following year, running through April 30, 2027, and the whole arrangement is scheduled to run in some form through April 30, 2030.
The logic behind the number is fairly straightforward once you see the math: 3.75% roughly mirrors the duty that would be owed if a 25% Section 232 tariff were applied to the portion of a vehicle’s MSRP typically made up of imported parts. Rather than forcing automakers to pay that duty in full and then separately petition for relief, Commerce built a credit directly into the tariff administration process.
On October 17, 2025, the administration went a step further with Proclamation 10984, which extended a parallel tariff structure to medium- and heavy-duty vehicles, MHDV parts, and buses — and, critically, directed Commerce to design a comparable offset for engine manufacturers. That directive is what produced the July 2026 notice: a formal offset track for companies that assemble automobile engines or MHDV engines inside the United States, even when those engines depend on imported components.
What the Engine Offset Actually Covers
The mechanics of the engine offset mirror the vehicle-assembly offset in most respects, but it is a distinct track with its own eligibility rules. Under the July 2026 procedures, an automobile engine or MHDV engine manufacturer can apply for an offset equal to 3.75% of the aggregate value of all qualifying engines it assembles in the United States, with that value determined annually by Commerce rather than set by the manufacturer itself.
The offset amount is not cash back — it functions as a credit that reduces the Section 232 duty liability tied to imported engine parts and related automobile or MHDV components. Unused offset amounts can be carried forward indefinitely, so a manufacturer that files a conservative forecast one year and ends up under-claiming isn’t penalized; the balance simply rolls into future periods until it is exhausted.
Timing differs depending on whether the engines go into passenger automobiles or into medium- and heavy-duty vehicles. For MHDV engines, Year 1 runs retroactively from November 1, 2025 through October 31, 2026. For automobile engines, Year 1 begins May 1, 2026 and runs through April 30, 2027, aligning with the second year of the original vehicle-assembly offset. The table below lays out the full structure alongside the original vehicle offset for comparison.
| Program | Offset Rate | Kvalifikationsperiode | Applies Against |
| Automobile Offset – Year 1 | 3.75% of aggregate MSRP | April 3, 2025 - April 30, 2026 | Section 232 duties on automobile parts |
| Automobile Offset – Year 2 | 2.5% of aggregate MSRP | 1. maj 2026 – 30. april 2027 | Section 232 duties on automobile parts |
| Automobile Engine Offset | 3.75% of aggregate engine value | May 1, 2026 – April 30, 2027 (Year 1) | Section 232 duties tied to engine manufacturing |
| MHDV Engine Offset | 3.75% of aggregate engine value | November 1, 2025 – October 31, 2026 (Year 1) | Section 232 duties on medium- and heavy-duty vehicle parts |
The Core Component Test: Where the Real Complexity Lives
The part of the engine offset that has generated the most questions among compliance teams isn’t the percentage — it’s the domestic content requirement attached to it. Commerce did not simply say “any U.S.-assembled engine qualifies.” Instead, it introduced a sliding domestic-content test built around a defined list of core engine components: cylinder heads, engine blocks, crankshafts, pistons and connecting rods, and turbochargers.
For the first two program years, an engine only qualifies for the offset if at least two of those core components were manufactured in the United States. Starting in Year 3, the bar rises to at least four qualifying components. Commerce also issued separate guidance on how emissions aftertreatment systems factor into the calculated value of an engine, since aftertreatment hardware is frequently imported even on otherwise domestically produced engines.
| Program år | Minimum U.S.-Made Core Components | Examples of Core Components |
| Årgang 1-2 | At least 2 of the listed components | Cylinder heads, engine blocks, crankshafts, pistons and rods, turbochargers |
| Fra 3. år og fremefter | At least 4 of the listed components | Same component list; emissions aftertreatment value treated separately |
For freight forwarders working with engine manufacturers or Tier 1 suppliers, this component-level test has a very practical implication: sourcing decisions on individual parts — where a crankshaft is forged, where a turbocharger is machined — now carry tariff-offset consequences that didn’t exist a year ago. A shipment routing decision that looks purely logistical on paper may actually be tied to a client’s eligibility for hundreds of thousands of dollars in annual duty offset.
Why This Matters for Auto Parts Importers, Not Just OEMs
It would be easy to read the engine offset as a program that only concerns large automakers and engine manufacturers, but the ripple effects reach much further down the supply chain. Most Tier 1 and Tier 2 suppliers that import components destined for U.S. engine assembly plants are affected in one of two ways.
First, several of them are the importers of record on the very parts shipments that determine whether an OEM’s engine qualifies for the domestic-content threshold. Under the application procedures, manufacturers must name the importers of record against which they intend to apply their offset — meaning a supplier’s own import documentation, HTS classifications, and declared values become part of a customer’s federal filing. Sloppy paperwork on the supplier side can jeopardize an OEM’s eligibility, not just its own compliance record.
Second, many mid-size and independent auto parts importers are themselves watching the quarterly Section 232 inclusions process, which continues to add new part categories to the tariff list even as the offset program expands relief on the other side. Staying current on which HTS subheadings are currently dutiable, which are pending public comment, and which qualify for offset treatment has become a genuine full-time compliance task rather than an occasional review.
The Paperwork Behind the Percentage
None of this offset is automatic. To claim it, an engine or vehicle manufacturer has to file annual documentation with Commerce that includes a production forecast broken out by engine or vehicle type, the aggregate value or MSRP of qualifying output, the specific offset amount being requested, the importers of record the offset will be applied against, and a signed accuracy certification. Commerce reviews each submission for completeness before granting the credit, and errors or omissions can delay when a manufacturer actually sees the benefit show up against its duty bill.
This is where many importers discover that customs compliance and freight planning can no longer be treated as separate workstreams. The import documentation generated at the port — entry values, HTS codes, country-of-origin declarations, bills of lading — feeds directly into whether an offset claim holds up under Commerce review. A freight forwarder that keeps clean, consistent, audit-ready shipping records isn’t just providing good service; for engine and auto parts importers, that documentation is now part of the tariff-relief pipeline itself.
How Topway Shipping Supports Auto Parts and Engine Component Importers
Since 2010, Topway Shipping, headquartered in Shenzhen, China, has worked with cross-border e-commerce and manufacturing clients moving cargo between China and the United States, and the tightening link between logistics data and tariff compliance is exactly the kind of shift the company’s operations are built to absorb. The founding team brings more than 15 years of experience in international logistics and customs clearance, with a strong focus on China–U.S. transportation routes that carry a large share of the auto parts and engine components affected by Section 232.
For importers navigating the engine offset and the broader Section 232 landscape, that experience translates into a few concrete advantages. Topway Shipping’s services span the full logistics chain — first-leg transportation out of Chinese factories and ports, overseas oplagring near major U.S. gateways, customs clearance, and last-mile delivery to assembly plants or distribution centers — which means shipment data stays consistent from origin to final delivery instead of fragmenting across multiple vendors. That consistency matters when a manufacturer’s offset application depends on importer-of-record details lining up cleanly with actual customs entries.
The company also offers flexible full-container-load and less-than-container-load ocean freight services from China to major ports worldwide, giving auto parts shippers room to scale volume up or down as sourcing decisions shift in response to the core-component rules described above. A supplier that needs to consolidate smaller, high-value engine component shipments — turbochargers or precision-machined parts, for example — can move them LCL without losing visibility, while larger, steadier flows of bulkier parts can move FCL on a predictable schedule that supports the production forecasting Commerce now expects manufacturers to submit.
Praktiske trin for importører lige nu
Manufacturers and their suppliers don’t need to wait for a compliance crisis to start preparing. A few practical moves can make a meaningful difference over the next few filing cycles.
Reviewing current sourcing of the five core engine components against the Year 1–2 and Year 3 thresholds is a natural starting point, since a supplier relationship that clears the bar today may not automatically clear it once the requirement rises from two components to four. Coordinating early with whichever OEM or Tier 1 customer will be listing a company as an importer of record is equally important, since offset applications require that information well in advance of filing deadlines.
Keeping shipment records — HTS classifications, declared values, country-of-origin documentation — clean and consistent across every entry also pays off twice: once for ordinary customs compliance, and again if that data ever needs to support a customer’s Commerce filing. Finally, tracking the quarterly Section 232 inclusions process remains essential, since new part categories can be added to the tariff list even as the offset expands relief elsewhere, and a part that is duty-free today may not stay that way.
Konklusion
The 3.75% engine tariff offset is a narrow program in the sense that it applies to a specific slice of the automotive supply chain — engines built domestically from a defined list of core components. But its effects extend well beyond the manufacturers who file the applications. Auto parts importers, Tier 1 and Tier 2 suppliers, and the freight forwarders who move their cargo are all now part of a compliance chain where clean logistics data and accurate customs documentation directly influence whether a manufacturer captures real tariff relief. In a tariff environment that has mostly moved in one direction, this offset is a rare exception worth understanding in detail — and for companies moving auto parts and engine components between China and the United States, working with a logistics partner that treats customs accuracy as a core part of the shipping process, rather than an afterthought, is quickly becoming as important as the freight rate itself.
Ofte Stillede Spørgsmål
Q: What is the 3.75% engine tariff offset?
A: It is a Commerce Department program allowing eligible U.S. automobile and medium- and heavy-duty vehicle engine manufacturers to claim a credit equal to 3.75% of the aggregate value of engines they assemble domestically, applied against Section 232 duties on related imported parts.
Q: Is this the same offset that applies to vehicle assembly?
A: No. The vehicle-assembly offset, in place since April 2025, is based on the MSRP of U.S.-built vehicles and steps down to 2.5% in its second year. The engine offset is a separate track introduced in 2026 specifically for engine manufacturers, also starting at 3.75%.
Q: Which engines qualify?
A: Automobile and MHDV engines assembled in the United States that meet a minimum domestic-content test: at least two of five defined core components in Years 1–2, rising to at least four core components from Year 3 onward.
Q: Do auto parts importers need to apply for this offset themselves?
A: Generally no — the manufacturer files the application — but importers of record named in that application need accurate, consistent customs documentation, since errors on their end can affect the manufacturer’s eligibility.
Q: Can unused offset amounts be lost?
A: No. Offset amounts that are granted but not fully used can be carried forward indefinitely until they are exhausted, according to the Commerce procedures.
Q: How can a freight forwarder help with this?
A: A forwarder that manages first-leg transportation, customs clearance, warehousing, and last-mile delivery under one process, such as Topway Shipping, helps keep shipment data consistent end to end, which supports the documentation manufacturers need for their annual offset filings.
