Sourcing From China, Vietnam, and Thailand: How to Think About Region Fit

Start here: country math is not enough

The China-versus-Southeast-Asia question has changed shape. Buyers still need to model duties, but a single country percentage is no longer a reliable region strategy.

In 2026, the U.S. Supreme Court held that IEEPA does not authorize the President to impose the challenged tariffs. That changed the legal basis for some earlier tariff actions, but it does not tell an importer whether a past entry is refundable or what duty applies to a new shipment. Those questions belong with a licensed customs broker or trade attorney.

A separate Section 122 surcharge was effective from February 24 through July 24, 2026. In July, USTR announced a Section 301 action imposing 10% or 12.5% duties on 60 trading partners, subject to product exemptions. China, Vietnam, and Thailand were among the economies covered by the investigation, but the exact treatment still depends on the product, origin, HTS classification, and any exemption.

The practical takeaway is simple: do not make a region decision from a country-level tariff headline. Use the tariff number as one input, then test the product code, origin, supplier process, and landed cost.

> As of August 2026. Tariff actions, exclusions, HTS provisions, and origin guidance can change. Confirm the applicable ten-digit HTS code, current additional duties, and any refund or exclusion issue with a licensed customs broker before pricing a shipment or signing a supply agreement.

Where the real gap is now

The country line is only one layer. Three others often decide the outcome.

Product-specific Section 301 duties on China. Some Chinese-origin products remain subject to additional Section 301 duties, while other products are outside the action or covered by exclusions. CBP explains that Section 301 coverage and rates are tied to the HTS classification and country of origin, and USTR provides the product-search process. A non-covered Chinese product and a Vietnamese product may land close together; a covered Chinese product may not.

Section 232 sector duties. Steel and aluminum content, autos and parts, and other covered sectors can carry separate measures. The USITC tariff resources are a better starting point than a country-level calculator because the applicable Chapter 99 provision depends on the goods.

AD/CVD orders and circumvention findings. Anti-dumping and countervailing duties are product-and-country specific. They can also reach third-country production when the facts support circumvention. For example, official CBP materials describe solar products made in Cambodia, Malaysia, Thailand, or Vietnam with Chinese inputs in the context of China AD/CVD orders. Check the relevant Commerce and CBP order before assuming a country move removes the exposure.

The region question is therefore a product-code question. Two buyers moving the same volume to the same Vietnamese province can get different answers because their HTS classifications, inputs, and processing steps differ.

The origin trap

Moving final assembly to Vietnam does not automatically make a product Vietnamese. For U.S. trade-remedy and marking analysis, CBP applies a substantial-transformation test: does the processing create a new name, character, or use, based on the totality of the circumstances?

The CBP ruling on a Vietnamese air inflator made with Chinese and Vietnamese components shows why this is a fact-specific analysis. CBP found Vietnam origin in that case because the operations in Vietnam were sufficiently complex and meaningful. That does not create a safe shortcut for every product. Repackaging, relabeling, or minor processing should not be treated as an origin strategy, and simple assembly may fail where the imported component remains the essential article.

If CBP determines that goods were transshipped to evade applicable duties, a 2025 Federal Register order provides for an additional 40% ad valorem rate plus other applicable penalties and says the penalties are not to be mitigated or remitted consistent with law. That rate is not an automatic charge on every product assembled in Vietnam; it is tied to a CBP determination of evasion.

What this means operationally: if origin matters to your landed cost, build a complete bill of materials showing input origins, document the process steps, and keep evidence of the value added in-country before the shipment sails. A supplier who offers to re-export Chinese goods under their own origin paperwork is not offering you a solution. They are transferring liability to you.

Region fit, product by product

With tariff arbitrage narrowed, region choice returns to what it should have been about: whether the supply chain for your specific product actually exists there.

China still holds the thing few regions have replicated: component depth. Yiwu for small commodities, Ningbo and Cixi for housewares and appliances, Shenzhen and Dongguan for electronics, Chenghai for toys, Foshan for furniture, Jinjiang for footwear. The practical advantage is not labor cost, which stopped being China's edge years ago. It is that a fastener, a motor, a zipper, or a specific coating can often be sourced close to the assembly line, so a sample revision takes days instead of weeks and tooling changes do not stall a program.

For a product with many components, a custom specification, or an iteration cycle that is not finished, this compounds quickly.

Vietnam is genuinely deep in a defined set of categories: furniture around Binh Duong and Dong Nai, footwear and apparel around Ho Chi Minh City, bags and luggage, and electronics assembly in the northern Bac Ninh and Thai Nguyen corridor. Where it gets complicated is inputs. Vietnamese factories in several of these categories still import fabric, hardware, and components from China. That affects your cost — you may be paying freight twice — and it makes origin qualification a question rather than a formality.

Thailand fits a narrower but real set: natural rubber and latex goods, food processing and food-contact packaging, auto parts, and jewelry in Bangkok. Infrastructure and documentation practice are mature, while labor and supplier costs can run above Vietnam. For food-adjacent and wellness categories with export documentation requirements, that maturity may be worth the difference.

What moving actually costs you

Duty is the visible number. These are the ones that show up later:

• Sample cycles get slower. If components come from China anyway, every revision includes an international leg. Plan on weeks, not days.
• MOQs often rise. A less dense supplier base means fewer factories willing to run your quantity, which reduces your leverage on minimums.
• You rebuild your QC relationships from zero. Inspection coverage, inspector availability, and your own familiarity with what "normal" looks like on a factory floor all reset.
• Tooling does not move. If your molds sit in a Chinese factory, they were built for that factory's machines. Budget for new tooling, or budget for a fight.
• Documentation load increases. If origin is part of your thesis, you are now maintaining a BOM-level audit trail you did not need before. That is a real ongoing cost, not a one-time setup.

A supplier quoting 8% less on the unit price can easily be more expensive after these costs.

A sequence that usually works

For most buyers under $2M in annual purchasing, the honest answer is not "move." It is:

1. Get your HTS code confirmed by a broker. Not looked up — confirmed. Everything downstream depends on it, and this is the cheapest step in the whole process. 2. Calculate your actual current exposure. Country line, plus Section 301 if covered, plus Section 232 on material content, plus any AD/CVD. Then compare against a realistic Southeast Asia landed cost, including freight and the costs above. 3. If the gap is small, stay and optimize. Better sourcing inside China, better quote comparison, better QC. Cheaper and faster than relocating. 4. If the gap is large, qualify a second supplier without moving the first. Run a small parallel order. Learn what breaks. Keep the China line running while you find out. 5. Only move volume once the second source has shipped clean, twice. And once your origin documentation has survived contact with a real entry.

Sometimes the right answer is China now, with a Southeast Asia option developed alongside — not as a hedge you will never use, but as a qualified, tested alternative sitting ready.

Questions worth asking before you commit

• What is my confirmed HTS code, and is the product covered by a Section 301 action?
• Is my category under any AD/CVD order, including circumvention findings that reach third-country producers?
• If I assemble in Vietnam, what specifically happens there, and is the processing substantial enough to change origin?
• Can my supplier produce a bill of materials showing input origins, on request, today?
• Which inputs would still come from China, and what does that do to both cost and origin?
• What does my broker say — not my supplier?

That last one matters. Your supplier is not liable for your origin declaration. You are.

How Funda works on this

We are China-first with supplier coverage in Vietnam and Thailand, which mostly means we are honest about when a move is not worth it. For many buyers asking about Vietnam, the answer after running the numbers is that the product is not covered by a China-specific Section 301 action, the gap is small, and the money is better spent on quote comparison and QC than on relocating a supply chain.

Where a move does make sense, we help qualify the alternative supplier, check whether the local input chain actually exists for your product, and coordinate the documentation side with your broker rather than around them.

We are a sourcing company, not a customs brokerage, and the line matters: we will tell you what we see on the factory floor and what the bill of materials looks like. Classification, origin rulings, and duty liability go to a licensed broker or trade attorney. Anyone in our position who tells you otherwise is selling you risk.

Related: comparing suppliers beyond Alibaba, Vietnam versus China manufacturing, and reviewing factory quotes.

The short version

Choose the region the way you choose a supplier: on evidence for your product, not sentiment about countries. Confirm your HTS code first, because it drives more of the answer than the country name does. Check whether the local input chain actually exists for what you make. And if origin is part of the plan, build the documentation before you need it.

The honest answer may be China now, with a Southeast Asia option developed alongside — not as a theoretical hedge, but as a qualified, tested alternative sitting ready.

Weighing this for a specific product? Start a sourcing project. Send the product details and we will tell you what we see, including when the honest answer is to stay where you are.