Approving a drawing is often the easy part of international manufacturing. The difficult questions start when finished components cross a border. Who is the importer, which commodity code applies, what value must be declared, and who pays duties and import VAT? A reliable approach to customs for outsourced manufacturing answers these questions before production starts.
Customs should not be treated as a final transport task. It is part of the commercial and technical setup of your supply chain. The purchasing contract, country of origin, product classification, Incoterm and shipping documents must all tell the same story. If they do not, a low manufacturing price can quickly be offset by delays, storage charges or incorrect tax treatment.
When customs applies to outsourced manufacturing
Goods moving within the EU customs union normally do not require an import declaration at the internal border. Goods entering the EU from a non-EU country do. The relevant route therefore depends on where the goods are physically manufactured and from where they are shipped—not only on the supplier’s registered office.
This distinction also matters in multi-stage supply chains. Raw castings may be produced in one country, machined in another and shipped from a third. The final invoice alone may not provide enough information to establish origin or classification. Map the physical flow alongside the commercial flow before agreeing prices.
Define the importer and obtain an EORI number
An EU business that lodges customs declarations needs an Economic Operators Registration and Identification number, commonly called an EORI number. The importer of record is responsible for the accuracy of the declaration even when a freight forwarder or customs broker submits it.
Agree in writing who will act as importer and who will supply the supporting documents. Do not assume that the party arranging transport automatically carries every customs responsibility. The agreed Incoterm helps allocate transport, risk and certain formalities, but it does not replace the legal obligations of the importer.
Classify the product with the correct HS or CN code
Every imported product needs a commodity classification. In the EU, the Combined Nomenclature code determines the duty rate and can trigger additional measures, restrictions or documentary requirements. Classification is based on the product’s characteristics and function, not on a convenient description such as “metal parts”.
Build a classification file that contains the drawing, material, manufacturing method, function, photographs and the reason for the selected code. For recurring parts, keep the decision consistent across suppliers and shipments. If classification is uncertain or commercially important, seek a binding ruling or specialist advice rather than relying on a supplier’s informal suggestion.
Determine customs value and total landed cost
Import duty is generally calculated from the customs value, which starts with the transaction value and may require additions such as certain transport, insurance, tooling or royalty costs. Import VAT follows its own taxable base. This means the supplier’s unit price is not the same as the landed cost.
A practical landed-cost model should include:
- part price, tooling and non-recurring engineering;
- packaging, inland transport and export handling;
- international freight and insurance;
- customs duty, brokerage and import VAT cash-flow effects;
- inspection, rework, inventory and delay risk.
Our guide to the true cost of international sourcing explains how these elements should be compared with the apparent purchase-price saving.
Establish origin and check preferential treatment
Origin is not necessarily the country from which the shipment departs. Non-preferential origin is used for trade measures and marking, while preferential origin may allow a reduced duty rate when the relevant trade-agreement rules are met. A supplier statement without supporting evidence is not enough.
Ask what transformation took place, where materials came from and which proof of origin will accompany the goods. Store origin evidence with the purchasing file. If a production route changes, review the origin conclusion before the next shipment.
Use Incoterms precisely
Incoterms define delivery points, cost allocation, risk transfer and several customs obligations. They do not cover ownership, payment terms, product compliance or every tax consequence. State the chosen Incoterm, named place and version in the purchase order—for example, “FCA supplier’s plant, Incoterms 2020”.
For an inexperienced buyer, DDP may look convenient, but it can create practical and tax complications if the overseas seller cannot act correctly as EU importer. FCA, CPT, DAP or other terms may offer clearer control depending on the route. Select the term with your logistics and customs setup in mind, not as a last-minute freight choice.
Prepare a customs document pack
A controlled shipment file normally includes the commercial invoice, packing list, transport document, classification, origin evidence and any permits or conformity documents. The invoice description should be specific enough for customs to identify the goods and should match the purchase order and packing list.
Define a pre-shipment check: quantities, net and gross weights, values, currency, country of origin, code, Incoterm and consignee details. This small gate prevents many clearance problems. It also aligns naturally with quality control before overseas shipment.
Connect customs with product compliance
Customs clearance does not prove that a product complies with EU product rules. Depending on the product, the importer may need access to technical documentation, declarations, labels or test evidence. Outsourcing the physical manufacturing does not automatically transfer the manufacturer’s legal responsibilities.
Include compliance requirements in the technical specification and supplier agreement. For critical parts, combine documentation review with inspection and traceability. Our overview of managing overseas manufacturing shows how technical, commercial and logistics controls fit together.
A practical customs workflow
- Map the physical and commercial supply chain.
- Confirm importer, EORI and broker responsibilities.
- Validate classification, origin and customs value.
- Select and document the Incoterm and named place.
- Calculate landed cost before approving the supplier.
- Create a standard shipment document pack.
- Check every first shipment before dispatch.
- Review recurring declarations and supplier changes.
When these controls are established early, customs becomes predictable rather than disruptive. TOS can coordinate production, inspection, logistics and customs handling as one managed process. For the broader transport setup, see our guide to outsourcing logistics and customs, or contact us to review a specific manufacturing route.