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How to use customs codes for smooth international shipping

30 Jun 2025

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Claude

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If you’re shipping products across borders, customs codes are something you really don’t want to get wrong. They’re crucial for getting your goods through customs smoothly, calculating the right duties and staying on the right side of regulations.

But despite how important they are, they’re often overlooked.

What are customs codes?

Customs codes are numbers used to classify goods when you trade internationally. The basic system is called the HS code, a global 6-digit standard created by the World Customs Organization (WCO). Every product you ship gets one.

Country and regions (like the EU) often take that 6-digit HS code and extend it to make it more specific. In the EU, this version is called a Commodity Code and it can be up to 10 digits long.

Here’s what that looks like in practice:
A smartphone might have an HS code like 8517.12.
A cotton T-shirt might be 6109.10.
The full EU commodity code for that cotton T-shirt could be 6109.10.00.10, which gives customs all the extra details they need.

When shipping within or into the EU, the customs code usually refers to this extended commodity code.

Customs authorities use these codes to:
• Assess duties and taxes.
• Determine whether import/export restrictions apply.
• Collect trade statistics.

Consequences of using the wrong customs code

Using an incorrect customs code can lead to serious consequences. You might end up paying the wrong amount of import duties or taxes. Either more than necessary, or not enough.

If the code results in underpayment, customs authorities can retroactively charge additional import duties and fines for up to three years or longer after the goods have been custom cleared.

On the other hand, when there’s overpayment due to misclassification, the IOR has the right to request a refund (within three years of the import date).

Tips for getting customs codes right

1. Know your product – Use a customs database (like TARIC) or consult a trade specialist to make sure you’ve got the correct HS or Commodity code. Know the restrictions of the destination country. (e.g. some items require a certification or have a different classification)

2. Stay updated – Customs codes and tariffs can change, so check regularly for updates.

3. Use smart tools – Platforms like Shipcloud allow users to input and transmit Commodity or HS codes through API or platform integrations. That means fewer errors and faster international processing with accurate customs documentation.

4. Provide full product descriptions – Along with the code, always include a clear product description, where it comes from and what it’s worth.

Shipping smarter with Shipcloud

The more global your e-commerce business becomes, the more complex shipping gets. Customs codes are a big part of keeping trade outside the EU efficient and compliant.

By understanding customs codes, you don’t just avoid problems, you set yourself up for smooth scaling and global success.

At Shipcloud we help companies grow their business across borders by streamlining shipping processes. Easily generate customs documentation with one click of a button. No logistical nightmare, but a smooth international shipping process.

Ready to ship smarter? Try Shipcloud.

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