HS codes for engineered parts: how to classify without guessing

What an HS code is

The Harmonised System is an international naming system for traded goods. It uses a six-digit code: a chapter, a heading and a subheading. Countries then add digits for their own tariff and statistical needs, which is why the same part can have a ten-digit code in one market and an eight-digit code in another.

The code drives duty, rules of origin, licensing and sometimes anti-dumping measures. It is not a description. It is a legal classification. A wrong code can change the duty rate, delay clearance or create a compliance problem after the shipment has arrived.

A classification method that holds up

Start with the goods as imported. Is it a material, a part or an assembly? What is it made of? What is its function? Then read the chapter notes and the heading text before choosing a code. The General Interpretative Rules set the order for resolving a conflict.

Do not start with the supplier's code and assume it is right. Suppliers often classify by habit or by the code that cleared the last shipment. Check the code against the actual drawing, material and function.

1. 01

   Describe the goods

   Material, process, function, dimensions and whether it is a part or an assembly.

2. 02

   Find the chapter

   Use the material and the function. Read the chapter notes.

3. 03

   Check the heading

   Read the heading text and the explanatory notes.

4. 04

   Apply the rules

   Use the General Interpretative Rules if two headings seem to fit.

5. 05

   Add national digits

   Check the destination tariff for the full code.

6. 06

   Document

   Keep the rationale, the drawing and any ruling with the entry.

The chapters that cover most engineered parts

Most of Qumek's product range falls into a small number of chapters. The exact heading still depends on the item, but the map below narrows the search.

Three examples of the same question

A copper busbar is usually classified in chapter 74 as copper bar or profile, unless it is a finished part of an electrical apparatus that is more specifically described elsewhere. A tin-plated copper lug may fall in chapter 74 as a copper article or in chapter 85 as an electrical connector, depending on its construction and function. A stamped steel bracket is usually chapter 73, but a bracket that is a dedicated part of a machine may be classified with the machine.

These examples show why the answer is not a keyword lookup. The material, the function and the degree of completion all matter. If the value or volume is significant, ask for a written classification from a customs broker or the customs authority.

The code is only half of the duty question

Duty depends on the code and the origin. A preferential trade agreement can reduce or remove the duty if the goods meet the rules of origin. The code determines the tariff line; the origin determines whether a preference applies.

Keep the bill of materials, the material certificates and the production records that support the origin claim. A certificate of origin without the underlying evidence is a weak position if the customs authority asks questions.

Common classification mistakes

The most common mistakes are classifying by the supplier's description, using a code from a similar part without checking the notes, ignoring the difference between a material and an article, and forgetting that the destination country adds digits. Another common mistake is assuming that a code with a lower duty rate is the correct code.

Build a classification record for every repeat part. Include the drawing revision, material, function, code, rationale, source and review date. When the part changes, review the code.

• Classifying a material as a finished part, or the reverse
• Using a competitor's code without checking the heading
• Ignoring chapter notes and the General Interpretative Rules
• Forgetting national digits and destination-specific measures
• Assuming the lowest duty code is correct
• No written rationale or review date

Assemblies, kits and unassembled parts

Many engineered products ship as more than one piece. A busbar assembly may arrive with insulators, fasteners and a bracket in the same carton. The classification question then changes from what the part is to whether the shipment is a set, an incomplete article or a collection of separately classified goods. General Interpretative Rule 2(a) extends a heading to an article that is incomplete or unassembled if it has the essential character of the complete article. A kit of unrelated parts does not qualify.

The test is essential character, not packaging. A connector body, its contacts and its strain relief, packed together for assembly, may be classified as the connector if the parts are designed only for that article. A box of assorted terminals in different sizes, sold as a workshop pack, is usually classified part by part. The packing list should mirror the classification so the entry lines match the invoice lines.

Assemblies also raise the question of whether a component is a part of general use or a part designed solely for a machine. A plain bolt is classified as a bolt. A moulded cover with a gasket groove that fits only one enclosure may be classified with that apparatus. Record the design intent, because the customs officer cannot see the assembly from the invoice description.

Building a classification record that survives an audit

A classification decision is only as good as the file behind it. For every repeat part, keep the drawing revision, the material certificate, a plain description of the function, the six-digit code, the full national code, the rationale and the date it was reviewed. Store it where the person making the entry can find it, not in an email thread.

Record the alternatives you rejected and why. If chapter 85 was considered and chapter 74 was chosen, write down the heading text that decided it. That note is the difference between a considered position and a guess if the authority asks two years later.

Review the code when the drawing, the material, the finish or the end use changes. A part that was a copper bar becomes something else once it is machined into a finished connector body. Review it again when the destination changes, because national digits and trade measures differ by market.

Give the broker a written instruction per part rather than a description. The importer signs the declaration, so the importer owns the position. A broker who receives a clear instruction can query it before the shipment, which is cheaper than a correction after clearance.