Auto parts are among the goods most exposed in the current tariff era, because a large share of the catalog is sourced from China and the parts that carry the most trade-remedy exposure are often the high-turnover ones merchants reorder constantly. The base duty on a chapter 87 part is generally modest, but it does not always arrive alone, and add-on rates can, depending on origin, turn a thin reseller margin negative on a single replenishment. If you sell brake pads, filters, sensors, or trim sourced overseas, the landed cost you priced against earlier may differ from what you pay today, so it is worth re-checking before you reorder.
Representative 2026 estimate stacking base MFN duty (USITC HTS 2026 Rev.10), Section 301 on China-origin goods (USTR), Section 232 on autos and steel/aluminum/copper articles (CRS IN12545), and the 10% Section 122 surcharge that expires 2026-07-24 and is under appeal (Skadden). Your exact per-SKU duty depends on the precise HS code, which MarginGuard resolves from the live HTS schedule once connected. Not legal or customs advice.
Thailand currently imports into the US under the reciprocal-tariff era, meaning a country-level reciprocal duty generally sits on top of the ordinary product-specific HTS/MFN rate set by each item's HS code. That reciprocal load is generally somewhat lower-stacked than what comparable goods face from China, where additional trade measures can pile on above the base duty — but it is still a real, added cost, not a tariff-free origin. For landed cost, this means a Thailand-sourced SKU usually carries a lighter total stack than its China equivalent, yet typically more than the headline base rate alone. The representative stacked rate for your specific category is shown in the rate box above, and your per-SKU rate depends on the exact HS code.
Thailand reads as a potential margin-relief alternative to China rather than a tariff escape hatch: for many categories the stacked rate tends to run somewhat below China's, so a like-for-like move may recover a few points of margin, but you would still pay base duty plus a reciprocal-era load on every unit. The caveats are threefold. First, the gap versus China is a moving target — reciprocal rates are set by policy and can be revised, so an advantage priced in today is not guaranteed for the next purchase order. Second, any relief generally depends on the goods genuinely originating in Thailand; simple transshipment or last-step finishing of Chinese components may not satisfy rules of origin and can carry compliance risk and higher-rate exposure. Third, any preferential-program eligibility depends on meeting that program's specific rules of origin, which turn on where the substantial work and inputs actually happen, not just the shipping country. As general guidance, treat Thailand as a possible partial hedge rather than a certainty: model the landed cost at the actual stacked rate for your HS code, and confirm origin details with your supplier and a qualified customs professional. This is general information, not customs or legal advice.
That's a single SKU. Across a full catalog the tariff hits every imported product differently depending on its cost and price — which is exactly why margin damage hides until a quarter closes light.
Paste your Shopify URL. In about ten seconds you'll see every SKU that dropped below your target margin after the current Thailand tariffs — and the exact price to charge to recover each one. Free, no login.
Scan your store free →Landed cost = unit cost × (1 + tariff rate). To get back to a target margin M, the recovery price is landed cost ÷ (1 − M). For a $90 part from Thailand at a 37.5% stacked rate, that means charging $113.44 to hold a 40% margin. Round to a clean price point and test it; the point is to stop selling underwater.
The duty starts with where the part lands in the Harmonized Tariff Schedule, and many finished vehicle parts fall under chapter 87 (parts and accessories of motor vehicles). The chapter alone does not set your rate: components are often classified by what they are made of or what they do rather than by the car they go on, so an electrical sensor can pull into chapter 85, a rubber hose into chapter 40, a fastener or bracket into chapter 73, and a bearing into chapter 84. What tends to move the rate is the part's primary function and material, whether it is a general-purpose article versus a part 'solely or principally' for a vehicle, and the country of origin, since origin is what can determine whether Section 301 China duties or other trade-remedy measures apply on top of the base rate. Those measures change over time, so confirm what is currently in force. The exact figure is per-SKU and depends on the precise HS code, so treat any single number as a starting point, not a quote.
A common trap is the 'parts' versus 'general-purpose article' line. A bolt, spring, gasket, or bearing you think of as an auto part is frequently classified by its own nature in chapters 73, 40, or 84 rather than as a chapter 87 vehicle part, which can land it at a different base rate and a different trade-remedy exposure than the rest of your catalog. The mirror-image trap is assuming everything that bolts to a car gets chapter 87 treatment, when an item with an independent commercial identity (a battery, a stereo, a standard bulb) is often classified by its function elsewhere. Pull the actual HS code your customs broker is filing rather than inheriting whatever the overseas supplier wrote on the commercial invoice, since their classification may be geared to export paperwork rather than to what you owe at US entry.
Because much of the auto-parts exposure is origin-driven rather than baseline-duty-driven, a high-leverage move can be shifting sourcing away from the origin that triggers the stacked rate, rather than chasing a lower base rate. Many parts have credible alternate-origin supply in countries such as Mexico, Taiwan, Vietnam, or Thailand, and for goods that qualify under USMCA rules of origin, Mexican-made parts may sit outside the China-specific layers. Substantial transformation is generally the standard that matters here, so simply trans-shipping a finished Chinese part through a third country does not change its origin and can be treated as evasion. This is a customs-compliance question to confirm with your broker before you act. Before you switch, confirm the new supplier's part carries the same HS code and price the full landed cost including the new origin's duty treatment, since a 'cheaper' factory can still cost more once its own classification and freight are included.
Why is my auto-parts duty higher than the roughly 2.5% base rate I expected?
The chapter 87 base rate is generally only the floor. For parts of Chinese origin, Section 301 duties and other trade-remedy measures may apply on top of it, which can produce a landed cost above the headline number; the specifics depend on the measures currently in force. Your effective rate is therefore driven largely by country of origin, not by the base classification alone, so two otherwise identical parts from different countries can carry very different total duty even when they share the same HS code. Confirm the current rate for your specific SKU.
Do I owe the same duty on a sensor or wiring harness as on a brake rotor?
Often no. Electrical components like sensors, harnesses, and control modules are frequently classified in chapter 85 rather than as chapter 87 vehicle parts, and they can carry a different base rate and different trade-remedy exposure. Mechanical parts like rotors, calipers, and suspension arms tend to stay in chapter 87 or pull into chapter 84. The reliable way to know is to check the specific HS code per SKU rather than applying one blanket rate across your catalog.
Can I avoid the China tariff by having the parts shipped through another country first?
Generally no. Routing a finished Chinese part through a third country to relabel its origin is trans-shipment, and US customs can treat it as evasion rather than a legitimate origin change. To actually change origin, the standard is usually substantial transformation, meaning the part is genuinely manufactured or substantially worked on in the new country. Real alternate-origin suppliers or USMCA-qualifying production are legitimate paths, paperwork rerouting is not, and the specifics are worth confirming with a customs broker.
Is sourcing from Thailand cheaper on tariffs than China?
Often, but not always. Thailand's reciprocal-era stack generally tends to run somewhat lower than China's, where additional trade measures can apply above the base duty. Thailand is not duty-free, though: you would still pay the product's base HTS rate plus the reciprocal load. The size of the gap depends on your exact HS code, and the representative stacked rate for your category is shown in the rate box above. Treat any savings as real but partial, and model the actual landed cost rather than assuming a flat discount versus China. This is general guidance, not customs or legal advice.
Does moving my supplier to Thailand automatically lower my duties?
Generally only if the goods genuinely originate in Thailand. Customs typically looks at where the substantial manufacturing and inputs actually occur, not just where the container ships from. Routing largely-Chinese goods through Thailand for a final step (transshipment) generally does not change the country of origin and can carry compliance risk, including higher-rate exposure. Consider confirming with your supplier where the real production and key components come from before you price in any savings. This is general guidance, not customs or legal advice.
Can goods from Thailand qualify for a lower or preferential rate?
Possibly, but it is generally never automatic — any preferential treatment depends on meeting that program's specific rules of origin, which hinge on how much of the value and processing happens in Thailand. The reciprocal-era duty can also be revised by policy, so a favorable rate today may not hold for future orders. Consider verifying current eligibility and the live rate for your HS code before each purchase order, and budget margin around the actual stacked rate rather than a best-case assumption. This is general guidance, not customs or legal advice.
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