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Trade Compliance · April 2026 · 9 min read
Rules of Origin Explained: How to Claim Zero Tariffs Under the UK-EU Trade and Cooperation Agreement
The UK-EU Trade and Cooperation Agreement (TCA), which came into force on 1 January 2021, established zero tariffs and zero quotas on trade in goods between the UK and the European Union. Five years on, many businesses are still paying duties they do not need to pay — either because they do not understand the rules of origin requirements that must be met to claim preferential treatment, or because they lack the documentation to support a claim they are entitled to make.
In textiles and clothing alone, research shows that only between 10% and 53% of UK exports to the EU claimed zero tariffs in the years following Brexit — a striking underutilisation of a benefit that exists specifically to support UK-EU trade. The reasons are consistently the same: the rules feel complex, the documentation requirements seem burdensome, and businesses default to paying standard duty rather than investing time in understanding whether they qualify for zero.
This article explains what rules of origin are, how they work under the TCA, what you need to do to claim preference, and the most common errors that result in claims being denied or investigated by customs authorities.
What rules of origin are and why they exist
Rules of origin (RoO) are the criteria that determine the “economic nationality” of a product — where it is considered to have originated, as opposed to where it was shipped from. They exist because preferential tariff rates under trade agreements are specifically intended to benefit producers in the countries that have signed those agreements. Without origin rules, goods manufactured entirely in a third country could be routed through an FTA partner to take advantage of lower tariffs — a practice known as tariff circumvention or transshipment.
Under the UK-EU TCA, the zero tariff rate applies only to goods that originate in the UK or the EU. A product manufactured entirely in China, shipped to the UK, repackaged, and then exported to France does not originate in the UK and does not qualify for zero tariff treatment under the TCA — regardless of where it was physically shipped from. The TCA’s origin rules define the level of processing or transformation that must take place in the UK or EU for a product to be considered as originating there.
How a product qualifies as originating
Under the TCA, there are three ways a product can qualify as originating in the UK or EU:
Wholly obtained
The product is produced entirely in the UK or EU without incorporating any materials from other countries. This applies most straightforwardly to agricultural produce, minerals, and animals born and raised in the UK or EU. A head of broccoli grown in Kent is wholly obtained in the UK. A salmon caught in Scottish waters is wholly obtained in the UK. For manufactured goods, wholly obtained status is rare — almost all manufactured products incorporate some imported materials or components.
Sufficiently processed or transformed
The product incorporates materials from outside the UK or EU, but those materials have been sufficiently processed or transformed within the UK or EU to confer originating status. The TCA sets out product-specific rules (PSRs) that define what “sufficient” means for each product category, expressed by HS code. The three main types of transformation test are:
- Change of tariff classification (CTC). The non-originating materials used in production fall under a different HS code heading from the finished product. The manufacturing process changed the product’s classification — which demonstrates that a meaningful transformation took place. For example, importing aluminium ingots (non-originating) and manufacturing them into engine components (a different HS heading) may satisfy the CTC test.
- Value-added test. The non-originating materials used must not exceed a specified percentage of the ex-works price of the finished product — or conversely, the value added in the UK or EU must meet a minimum threshold. The specific percentage varies by product.
- Specific process rule. Certain product categories require a specific manufacturing process to take place within the UK or EU — regardless of where the materials came from. Chemical reactions, specific textile operations, and certain food processing operations are examples.
For each product, the applicable PSR is determined by its HS code. Different products may have different tests — or combinations of tests — so checking the specific rule for each product you trade is essential before making an origin claim.
Produced entirely from originating materials
The product is manufactured in the UK or EU using materials that are themselves already originating in the UK or EU. This applies where all inputs meet their own origin requirements and the final manufacturing takes place in the UK or EU.
Cumulation: counting UK and EU content together
The TCA permits bilateral cumulation between the UK and EU. This means that materials originating in the EU can be treated as originating in the UK for the purposes of satisfying the TCA’s rules of origin — and vice versa.
In practice, this means a UK manufacturer can incorporate EU-origin components into their product and count those components as UK-origin content when calculating whether the product meets the TCA’s origin requirements. For example, a UK manufacturer using steel produced in Germany (EU-originating) can count that steel as originating material when assessing whether their finished product qualifies for zero tariff export to France.
Bilateral cumulation is a significant benefit for UK-EU supply chains — it allows businesses on both sides of the border to treat the other’s materials as effectively domestic for origin calculation purposes. However, it does not extend to materials from third countries. Content from China, the US, or any other non-UK, non-EU source cannot be cumulated and must be treated as non-originating in the TCA origin calculation.
How to prove origin: the statement on origin
Once you have established that your product meets the applicable product-specific rule and qualifies as originating, you need to prove that status to customs authorities. Under the TCA, proof of origin takes one of two forms:
Statement on origin
This is a self-declaration by the exporter, placed on a commercial invoice or any other commercial document that identifies the goods. The statement must include prescribed text confirming the originating status of the goods. There is no separate certificate to obtain — the statement is made by the exporter directly on their commercial documentation.
UK exporters can make a statement on origin for any value of goods. EU exporters can make a statement on origin for consignments valued up to €6,000 without registration. For EU exports above €6,000, the exporter must be a Registered Exporter (REX) — a registration obtained from the customs authority of the relevant EU member state.
Importer’s knowledge
An importer can claim preferential tariff treatment based on their own knowledge that the goods are originating — without a statement on origin from the exporter. This might apply where the importer has detailed, documented knowledge of the supply chain and production process that allows them to independently verify the originating status of the goods. In practice, importer’s knowledge claims are less common and carry higher audit risk, as customs authorities expect the importer to be able to substantiate the claim with documented evidence on demand.
What documentation you must keep
Making an origin claim — either as an exporter providing a statement or as an importer claiming preference — comes with a documentation retention obligation. HMRC requires that all evidence supporting an origin claim be retained for a minimum of four years from the date of the import declaration. EU customs authorities apply a similar requirement.
The documentation that supports an origin claim typically includes:
- Supplier declarations from your own suppliers confirming the origin of materials they provided to you
- Bills of materials or production records showing which materials were used in manufacturing the product
- Purchase invoices for non-originating materials, showing their value relative to the finished product (for value-added tests)
- Manufacturing process records demonstrating that the required transformation took place in the UK or EU
- The statement on origin issued to the customer, or the basis for an importer’s knowledge claim
An origin claim that cannot be substantiated with this evidence is not a valid claim. If HMRC or an EU customs authority audits an origin claim and the documentation is insufficient, the importer will be required to pay the standard MFN duty rate on the goods — plus interest, and potentially penalties if the claim is found to have been made without reasonable grounds.
The most common rules of origin errors under the TCA
| Error | What goes wrong | Consequence |
|---|---|---|
| Assuming “made in UK” means originating | A product assembled in the UK from non-UK, non-EU components may not meet the product-specific rule. Assembly alone rarely confers origin. | Origin claim denied. Standard MFN duty assessed. |
| Not obtaining supplier declarations | Exporters claim origin without securing written confirmation from their own suppliers about the origin of the materials they used. | No documentary evidence to support the claim at audit. Claim invalidated. |
| Applying the wrong product-specific rule | Origin assessment based on the wrong HS code, or on a generalised assumption rather than the specific PSR for that product. | Product may not actually qualify. Incorrect claims subject to back-duty and penalties. |
| Including non-UK/EU content in the cumulation calculation | Treating materials from third countries (China, US, etc.) as originating content under the bilateral cumulation rule. | Origin calculation is wrong. Product may not meet the threshold. |
| Incorrect or missing statement on origin text | Statement on origin does not use the prescribed wording set out in the TCA, or is placed on a document that does not identify the goods adequately. | Proof of origin is invalid. Importer cannot claim preference at destination. |
| Insufficient record retention | Supporting documentation not retained for the required four-year period, or not organised in a way that can be produced promptly at audit. | Valid claim cannot be substantiated. Duty assessed as if claim was never made. |
Supplier declarations: the weak link in most origin chains
Of all the documentation requirements, supplier declarations are the one that most often breaks down in practice. A supplier declaration is a statement from your material or component supplier confirming the origin of the goods they supplied to you, and whether those goods meet the applicable TCA origin rules.
Without supplier declarations, you cannot confirm the origin of the materials you are incorporating into your products — and therefore cannot confirm that your finished product meets the TCA’s product-specific rules. You may believe your product qualifies for zero tariff treatment. Without supplier declarations, you cannot prove it.
Supplier declarations should be obtained before origin claims are made — not after an audit notice arrives. They should be reviewed regularly, as changes in your supplier’s own supply chain may affect the origin of the materials they are providing to you. A supplier who was providing EU-originating materials in 2022 may have switched to a Chinese source in 2024 without informing you — invalidating origin calculations that had previously been correct.
What to do if you have been paying duty when you may not need to
If your products might qualify for zero tariff treatment under the TCA but you have been paying standard MFN duty, it is worth reviewing your supply chain against the applicable product-specific rules. Origin claims can, in some circumstances, be made retrospectively — importers who have paid duty on goods that qualify as originating may be able to claim a refund for a limited lookback period, subject to being able to produce the required documentation.
The starting point is to identify the correct HS code for each product and check the applicable PSR in the TCA’s annex. The EU’s ROSA (Rules of Origin Self-Assessment) tool, available through the Access2Markets platform, provides interactive guidance on whether a specific product meets the origin requirements for EU-UK trade. HMRC’s Trade Tariff tool provides equivalent guidance for UK imports.
For complex supply chains or high-value products where the duty saving is material, professional advice from a trade compliance specialist is a worthwhile investment. The cost of an incorrect origin claim — back-duties, interest, and penalties — typically far exceeds the cost of getting the assessment right before the claim is made.
Frequently asked questions
Do I need to pay duty on goods I import from the EU into the UK?
Not if the goods originate in the EU and meet the applicable rules of origin under the UK-EU TCA. The TCA provides for zero tariffs on goods that qualify as originating in the EU or UK. You must claim preference on your customs declaration and hold proof that the goods meet the origin rules — either a statement on origin from your EU supplier, or documented importer’s knowledge. Without a valid claim and supporting documentation, standard MFN duty rates apply.
What is the difference between a certificate of origin and a statement on origin?
Under the TCA, the proof of origin is a statement on origin — a self-declaration made by the exporter on a commercial document. There is no separate certificate of origin document required for UK-EU trade under the TCA. This is different from some other trade agreements that require a formal EUR.1 movement certificate issued by customs authorities. For TCA purposes, the exporter’s own statement on the invoice or commercial document, using the correct prescribed wording, is sufficient.
Can I count EU materials as originating when calculating whether my UK product qualifies?
Yes. The TCA permits bilateral cumulation, which means materials that originate in the EU can be treated as originating in the UK for the purpose of meeting the TCA’s product-specific rules, and vice versa. However, this only applies to materials that are genuinely of UK or EU origin. Materials from third countries — including China, the US, Vietnam, or anywhere else outside the UK and EU — cannot be cumulated and must be treated as non-originating in the calculation.
What happens if HMRC audits my origin claims?
HMRC has the authority to audit origin claims made on customs declarations. If an audit finds that an origin claim was made without adequate documentary evidence — even if the goods actually qualified — the claim may be invalidated and standard duty assessed on the imports, with interest. If goods are found not to have met the origin rules at all, back-duty, interest, and penalties may apply. Maintaining complete supplier declarations, bills of materials, and production records for at least four years from the import declaration date is essential protection against this exposure.
Do rules of origin apply to all UK-EU trade, or only certain goods?
Rules of origin apply to all goods traded between the UK and EU where the importer or exporter wishes to claim the preferential zero tariff rate under the TCA. They do not apply to services. For goods where no preference is claimed — for example, where the standard MFN duty rate is zero anyway, or where the duty saving does not justify the compliance effort — origin rules do not need to be assessed. However, for any goods where there is a meaningful difference between the TCA zero tariff and the applicable MFN rate, understanding and claiming the preferential rate is a direct saving that is worth pursuing.
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