Anyone starting to import from China tends to give all their attention to the product and the supplier’s price, and treat the rest as paperwork that "the customs broker sorts out". But there is a technical detail, hidden in the middle of the process, that changes the final cost of the operation and the legal risk of the business: the tariff classification of the goods, that is, the NCM code. It is a number that looks small and decides a great deal.
The good news is that the concept is simple to grasp, even if the classification itself is specialist work. Understanding what is at stake already puts you ahead of most importers, who discover the importance of the NCM code only when the tax authority knocks.
What the NCM code is
NCM stands for Nomenclatura Comum do Mercosul, the Mercosur common nomenclature, an eight digit code that classifies each product for foreign trade purposes. It is built on the Harmonized System (HS), an international standard adopted by most countries, and adds digits of its own from Mercosur. In practice, the NCM code is the product’s "tax identity": it is how customs knows exactly what is entering the country.
Every item you import has an NCM code. Headphones, a light fitting, a machine, a cosmetic: each one fits a specific code, and it is that code the Receita Federal uses to know how much to tax and what to require. There is no importing without classifying; the question is classifying rightly or wrongly.
How the code is built
The eight digits are not random: they go from the general to the specific, narrowing the product category step by step. Understanding the logic helps you see why similar products can end up in different codes.
| Digits | Level | What it represents |
|---|---|---|
| 85 | Chapter | The broad group of the product (chapter 85, for example, covers machinery, appliances and electrical equipment). |
| 85.__ | Heading | The family within the chapter (the type of electrical appliance). |
| 85.__.__ | Subheading | The international (HS) breakdown of the product. |
| 85.__.__.__ | Item and sub-item | The final Mercosur breakdown, which completes the eight digits. |
It is that narrowing that makes classification a technical task. Picking the right chapter is the start; reaching the exact sub-item, respecting the rules and the official notes, is what determines the final NCM code and, with it, the tax and the controls.
Why the NCM code decides your cost
The NCM code is not a descriptive label, it is a trigger for consequences. From it are determined:
The rate of import duty and of IPI comes from the NCM code. Different codes mean different tax burdens for similar products.
The NCM code indicates whether the product needs an import licence and clearance from bodies such as INMETRO, ANATEL, ANVISA or MAPA.
Antidumping duties, benefits such as the ex-tarifário tariff reduction and specific regimes are tied to particular NCM codes.
The classification guides the clearance and the level of scrutiny. A code inconsistent with the product raises a flag.
In other words, the same box of products can cost more or less to clear depending on a single field. That is why the NCM code enters the calculation from the planning stage, and not as a surprise at the end. It is a central piece of the total cost of importing from China and speaks directly to the INMETRO requirements and to the approval of electronics.
The classification error and what customs charges
Wrong classification happens in two ways, and neither of them is good for the importer:
An NCM code with a lower tax than the correct one: it looks like a saving, but it is a time bomb. The tax authority can reclassify the product, charge the tax difference with interest and impose a fine. When the error is read as an attempt to pay less, the situation worsens, with heavier penalties.
An NCM code with a higher tax than the correct one: here there is no assessment, but there is a silent loss: you pay more tax than you should on every import, eating away at the margin without noticing, sometimes for years.
And there is the cost that is not fiscal: the wrong NCM code can let the product in without a clearance that would be mandatory, or trigger the requirement for an unnecessary licence, resulting in cargo held at clearance, with storage and delay. In either case, the mistake costs more than classifying correctly from the start. It is one of the silent reasons why importers lose money in China.
The point that does not change: responsibility for the correct NCM code lies with the importer, even when the classification is done by a third party. There is no point blaming the Chinese supplier or somebody’s guess; the one who answers to the tax authority is the one who imports. That is why classifying well is protection, not formality.
How to classify correctly
The commonest mistake is picking the NCM code "by the name that looks closest" on a list. Correct classification does not work that way. It follows a method:
- A precise technical description: it all starts with knowing exactly what the product is, what it is made of, what it is for and what its essential character is. A trade name is not enough.
- The General Rules of Interpretation: classification follows the General Rules for the Interpretation of the Harmonized System and the section and chapter notes, which have force of law and settle the cases where a product could fit more than one code.
- A formal ruling request, when in doubt: in complex situations, the importer can put a tariff classification query to the Receita Federal, whose answer is binding and gives legal certainty.
In practice, this is specialist work, done before closing the import and not after the problem appears. Classifying correctly from the start avoids both the assessment and the tax overpaid, and it is a stage that fits into the planning alongside the Incoterms and the step by step guide to importing.
How BCVN classifies for you
Tariff classification is exactly the kind of technical detail that can slip by unnoticed and charge dearly later. BCVN takes care of it within the import process: we start from the real technical description of the product, classify on the basis of the proper rules, confirm the tax burden and the clearances required before you place the order, and run the import with the right NCM code, so that there is neither tax overpaid nor risk of assessment and holding.
That way, classification stops being an unknown and becomes part of the calculation from the planning stage: you know the real cost before buying and import with legal certainty. It is part of structuring the whole operation, whether through a third party importer, or for your own brand. That is 18 years helping Brazilian importers bring products from China with the right sums and no surprises at customs.
Frequently asked questions about the NCM code and tariff classification
What is the NCM code and what is it for?
NCM stands for Nomenclatura Comum do Mercosul, the Mercosur common nomenclature, an eight digit code that classifies each product for import and export purposes. It is based on the Harmonized System, an international standard, and serves to identify exactly what the product is to customs. It is from the NCM code that the duty payable on the product and the controls and licences it needs are determined. Every item you import from China has an NCM code, and classifying it correctly is a compulsory step in the process.
How does the NCM code affect import duty?
The NCM code sets the rate of import duty and of IPI applicable to the product, besides influencing the administrative treatment, such as the need for an import licence and clearance from bodies like INMETRO, ANATEL or ANVISA. Two similar products can have different NCM codes and, with that, quite different tax burdens. That is why classification is not a bureaucratic detail: it has a direct impact on the final cost of your import and on whether the deal is viable.
What happens if I classify the product under the wrong NCM code?
It depends on the error, but it is never good. If you classify under an NCM code with a lower tax than the correct one, the tax authority can reclassify, charge the difference with interest and impose a fine, and an error treated as intentional makes it worse. If you classify under a code with a higher tax, you pay more than you should and lose margin needlessly. Beyond the tax, the wrong NCM code can let the product in without a required licence, or demand a licence that would not be necessary, causing the cargo to be held at clearance.
Who is responsible for tariff classification on an import?
The importer. Responsibility for declaring the correct NCM code lies with whoever imports, even if the classification is in practice done by a customs broker or a specialist. There is no point pointing at the Chinese supplier or at third parties: before the Receita Federal, the one who answers is the importer. That is why it is worth working with someone who classifies on the basis of the proper rules, and not with a guess from the product name, which is where most errors live.
How do I find the correct NCM code for a product imported from China?
Correct classification starts from a precise technical description of the product, what it is, the material, the function and the essential characteristics, and follows the General Rules for the Interpretation of the Harmonized System, together with the section and chapter notes. It is not a matter of choosing the name that looks closest on a list. In cases of doubt, a formal tariff classification query can be put to the Receita Federal, and its answer is binding. In practice, the safest route is to classify with specialist support before closing the import, and BCVN takes care of that for you.