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HS Code Classification & Tariff Engineering · Shenzhen, China · 15 Years

Duty is not a fixed cost.
It is the output of a classification decision.

Updated · By China Fulfillment International Shenzhen

Ask most importers how their HTS codes were chosen and you get one of three answers. The supplier provided them. The broker set them up at onboarding. Or nobody actually knows. None of those is a classification decision, and defaults are how sellers end up paying the wrong rate for years in either direction.

We capture the product data that correct classification depends on, at the point where it is generated. Materials, fibre content, construction, weights and dimensions, recorded at intake in Shenzhen and kept consistent across every shipment, so the decisions your customs broker makes are built on facts rather than guesses.

15+
Years Cross-Border Experience
200+
Countries Shipped To
100%
Audit-Ready Records
5 yrs
Record Retention Supported
Where Classification Quietly Goes Wrong

The deciding attribute is usually sitting in a spec sheet nobody reads

Some categories are far more error prone than others, because the code turns on a physical detail that never appears on a commercial invoice. Here is where we see it most.

Most money lost to classification is lost to plain error rather than missed cleverness. Before anything cleverer, rank your products by duty actually paid over twelve months, take the top ten, and try to write down why each code is right. What you cannot justify in writing is what to fix.

The Numbers

What stacks on Chinese goods, as at 31 August 2026

Tariff policy moved twice this year. The Supreme Court struck down one regime in February and a replacement took effect in July. These rates are current as at 31 August 2026 and should be verified before you price anything.

US China import customs documents and HTS classification review for ecommerce sellers shipping from Shenzhen

Struck down, not merely paused

The Supreme Court ruled 6 to 3 on 20 February 2026 that IEEPA does not authorise the President to impose tariffs. Every IEEPA tariff fell with it. CBP has been processing refunds since, and by 31 July 2026 around $128.68 billion had been accepted for processing. If you imported during that window, it is worth checking whether you are owed money.

Section 301 is the layer that survives

Section 301 duties were unaffected by the ruling and have survived court challenge repeatedly. They attach by HTS code, so your classification decides not only your base rate but which list you fall into, and therefore whether you pay 7.5% or 25% on top. Planning on the assumption they will disappear is not a plan.

LayerRate on Chinese goods
MFN base duty, set by HTS code0–37.5%
Section 301, 2018 Lists 1–325%
Section 301, 2018 List 4A7.5%
Section 301, forced labour (24 Jul 2026)12.5%
Section 232, where applicable25–50%
IEEPA tariffsStruck down 20 Feb 2026
Section 122 surchargeExpired 24 Jul 2026

Illustrative only. Actual liability depends on your specific HTS classification, country of origin rules, and current trade policy. Verify before relying on these figures. Our landed cost guide walks through the arithmetic.

Tariff Engineering

Lawful since 1882, and narrower than it sounds

Tariff engineering is designing a product so that it lawfully falls under a better classification. CBP itself describes it as the longstanding principle that an importer has the right to fashion merchandise to obtain the lowest rate of duty. The line is where the imported condition stops being real.

Lawful

Merritt v. Welsh (1882)

Sugar refiners produced sugar in darker colours because the tariff was keyed to colour. The Supreme Court was unimpressed by the evasion argument: has not a manufacturer a right to make his goods as he pleases? If Congress writes a tariff that turns on colour, it has told manufacturers that colour is what matters.

Motive alone does not disqualify you
Lawful

United States v. Citroen (1912)

Drilled but unstrung pearls attracted 10% duty against 60% for strung pearls. The evidence showed plainly they were designed, marketed and imported to be strung into jewellery. The Court still held they were classifiable as unstrung, because that was their condition at import.

The physical fact at the border governs
Lawful

Converse, the modern example

Felt applied to the outsole changes the classification under the footwear headings. The felt is really there, the shoe functions with it, and consumers buy it in exactly the condition it was imported. Nothing is removed at the port.

Sells the shoe it imported
Artifice

Ford Transit Connect, $365 million

Vans imported with a second row of seats and declared as passenger vehicles at 2.5% rather than cargo vehicles at 25%. After clearance and before leaving the port, the seats were removed. CBP called it an improper artifice or disguise. The Court of International Trade found for Ford, the Federal Circuit reversed, and Ford settled for $365 million.

Did not sell the vehicle it imported
The Test

Five questions before you redesign

Does the product function as imported? Does the customer receive it in that form? Would it survive full written disclosure to CBP? Is there a commercial reason beyond duty? If the change were reversed after clearance, would the product be materially different? Flinch at any of the first three and stop.

Test it in a binding ruling, not in litigation
The Cost

What getting it wrong carries

Under 19 USC 1592 the statutory maximums are 20% of the domestic value of the merchandise for negligence, 40% for gross negligence, and the full domestic value for fraud, on top of unpaid duty and interest. Negligence means a failure to exercise reasonable care, which is a hard argument to win if nobody documented how a code was chosen.

Document the reasoning, not just the code
What We Actually Do

We supply the facts. Your broker and counsel make the call.

Classification decisions are only as good as the product information behind them, and that information is generated at the factory and the warehouse rather than in a spreadsheet. That is the part we own.

1

Attribute Capture at Intake

Materials, fibre content, construction, weights and dimensions recorded when goods arrive, not reconstructed later.

2

Consistency Across Shipments

Declared values and product descriptions kept aligned shipment to shipment, so nothing contradicts anything.

3

Change Detection

When a supplier quietly substitutes a subcomponent, being at the factory end of the chain is where it gets noticed.

4

Documentation Prepared

Complete commercial invoices and export documentation prepared correctly before goods move.

5

Audit-Ready Records

Records held and retrievable, supporting the five year retention obligation that sits with you as importer of record.

What we are not. We are not a licensed customs broker and we are not trade counsel. We do not sign your entries, we do not assume importer of record responsibility, and we would be wary of anyone who offers to. For a classification you intend to rely on, for first sale valuation, for a binding ruling request, or for anything that has already become a dispute with CBP, engage a licensed customs broker or a trade attorney. We work alongside them regularly and the combination works well. Our tariff management service is built to feed them accurate data, which is usually the part that is missing.

Go Deeper

The detail behind each part of this

Three guides covering the case law, the audit method, and how to get a documented answer out of CBP rather than an opinion.

Guide 01

Tariff Engineering: Where the Legal Line Sits

The full case law. Merritt, Citroen, Converse and Ford read side by side, the five part test in detail, and what lawful engineering realistically looks like for consumer goods coming out of China.

Read the guide →
Guide 02

The Classification Mistakes That Quietly Cost Money

How the six General Rules of Interpretation actually decide, the category traps in detail, and a practical half day method for auditing the codes you are already using.

Read the guide →
Guide 03

How to Get a Binding Ruling from CBP

Searching CROSS properly, what to put in an eRulings request, realistic timelines, when it is worth requesting, and the catch that a ruling binds you as well as CBP.

Read the guide →
Questions

Questions about classification and tariff engineering

Who is legally responsible for the HTS code on my shipment?
The importer of record. Not your supplier, not your freight forwarder, and not your fulfilment provider. The importer of record signs the entry, owes the duty, must exercise reasonable care in classification and valuation, and must keep records for five years. A supplier’s code on a commercial invoice is a starting suggestion with no legal weight in the US.
Is tariff engineering legal?
Yes, when it is genuine. US customs law classifies merchandise in the condition in which it is imported, a principle confirmed in Merritt v. Welsh (1882) and United States v. Citroen (1912). An importer may lawfully design a product so that it falls into a lower duty classification. What is not lawful is a change that exists only to mislead customs and is undone after clearance, which CBP treats as artifice or disguise.
What tariffs apply to Chinese goods entering the US right now?
As at 31 August 2026, three layers stack. The MFN base duty for the product’s HTS code, Section 301 duties from the 2018 lists at 25% on Lists 1 to 3 and 7.5% on List 4A, and a Section 301 forced labour duty of 12.5% effective 24 July 2026. Section 232 duties apply on top where relevant. IEEPA tariffs were struck down on 20 February 2026 and the Section 122 surcharge expired on 24 July 2026. Rates change often, so verify before relying on them.
What happens if my HTS code is wrong?
If the code understates duty you owe the difference plus interest, and CBP may assess a penalty under 19 USC 1592. Statutory maximums are 20% of the domestic value of the goods for negligence, 40% for gross negligence, and the full domestic value for fraud. If the code overstates duty you have simply been overpaying, and recovery is generally limited to entries still within the liquidation or protest window, which is why older overpayments are usually gone.
Are you a licensed customs broker?
No. We are a fulfilment provider. We capture accurate product data, keep declared values and descriptions consistent, prepare complete documentation and hold audit ready records. For a classification you intend to rely on, for first sale valuation, for a binding ruling request, or for any dispute with CBP, engage a licensed customs broker or a trade attorney. We work alongside them regularly.
Does fulfilling from China reduce my duty rate?
No, and anyone telling you otherwise is overclaiming. The duty rate follows the product’s classification and origin, not the shipping method. What changes is when duty is paid and against what revenue. Bulk import means paying duty on a full container before a single unit has sold. Shipping direct to the customer means duty is assessed shipment by shipment, in step with revenue. That is a cash flow difference, not a duty saving.
Can I still use the de minimis exemption for small US parcels?
No. The $800 de minimis exemption has been suspended since 2025, the Court of International Trade upheld the suspension in Axle of Dearborn on 13 August 2026, and Congress repealed the statutory exemption outright with effect from 1 July 2027. Low value parcels into the US are dutiable. Our guide to the end of US de minimis covers what replaced it.
How do I get certainty on a classification rather than an opinion?
Search CBP’s CROSS database at rulings.cbp.gov first, because the agency may already have ruled on something close to your product. If nothing fits, request a binding ruling through the eRulings portal. CBP’s National Commodity Specialist Division aims to issue most classification rulings within 30 calendar days, with roughly 90 days for Headquarters referrals and 120 to 180 days or longer for genuinely novel products.

Your duty rate starts with
a product data problem.

Send us your top products by duty paid. We will tell you what attributes we can verify at intake, what is missing from your current documentation, and what your broker would need to classify them properly.

No commitment. No credit card. We will also tell you plainly when the answer needs a licensed broker rather than us.

15 years cross-border experience
Attributes captured at intake
100% audit-ready records
We work alongside your broker