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Rules of origin are the criteria that determine whether goods count as originating from a particular country for trade agreement purposes. For UK exporters selling to EU customers, getting this right determines whether your buyer pays 0% import duty or the full EU tariff rate. The UK-EU Trade and Cooperation Agreement contains detailed rules of origin requirements — and claiming preferential duty when you don't meet them creates real legal exposure for you and your buyer.

Why Origin Matters

Under the TCA, goods that originate in the UK are entitled to 0% import duty when entering the EU, and goods that originate in the EU are entitled to 0% when entering the UK. But "originating in the UK" has a specific legal meaning — it doesn't simply mean "shipped from the UK." Goods made in China, stored in a UK warehouse, and exported to France are not UK-originating. Goods manufactured in the UK using some imported components may or may not be UK-originating, depending on the specific product rules.

If your EU buyer claims TCA preference at their customs border without valid evidence of UK origin, and the EU customs authority later investigates, the duty will be collected retrospectively — from your buyer. Your buyer will then look to you for the evidence behind the statement on origin you made out. If you can't provide it, or if it turns out the goods didn't genuinely originate in the UK, you face a civil claim and potential fraud exposure.

The Two Core Tests: Wholly Obtained and Sufficiently Processed

Wholly obtained. Goods are wholly obtained in the UK if they are entirely grown, harvested, caught, or extracted here. Agricultural produce grown in UK fields, fish caught in UK waters, and minerals extracted from UK soil are wholly obtained. No imported materials are involved. For these products, UK origin is straightforward to establish.

Sufficiently processed. Most manufactured goods involve materials sourced from multiple countries. A food product made from ingredients sourced globally but prepared in a UK facility must pass this test: have the non-originating materials been sufficiently processed in the UK to confer origin? But note one powerful shortcut the TCA gives you first — bilateral cumulation. Materials that already originate in the EU count as originating when you use them in UK production. A garment cut and sewn in a UK factory from fabric woven in Portugal qualifies not because the Portuguese fabric was "sufficiently processed" — it's because EU-originating fabric counts as originating from the outset. Cumulation is one of the most useful features of the TCA for UK manufacturers, and one of the least known.

The TCA specifies product-specific rules of origin (PSRs) for every HS chapter. Common forms the PSR can take include:

• Change of tariff heading (CTH): the non-originating inputs must be classified under a different tariff heading from the final product. This is the most common rule for manufactured goods.
• Maximum value of non-originating materials (MaxNOM): non-originating inputs must not exceed a specified percentage of the ex-works price. Under the TCA the ceilings run from roughly 10% to 50% depending on the product — 50% is common for manufactured goods, and vehicles sit at 45%. (Figures like 70% belong to other schemes such as DCTS, not the TCA.)
• Specific processing requirements: certain operations must be performed in the UK or EU. Apparel is the cautionary example: the TCA rules for clothing generally require the fabric to be woven or knitted and made up in the UK or EU. Cutting and sewing imported Chinese fabric in a UK factory does not confer origin, narrow exceptions aside — a trap that catches a lot of garment businesses.

Practical Examples

UK candle manufacturer. A business makes scented candles in Bristol using UK-sourced beeswax and imported fragrance oils. The finished candle falls under a different HS heading from the fragrance oil input, so the CTH rule is met and the candles are UK-originating. (PSRs are usually alternative tests — satisfy the CTH rule or stay under the MaxNOM ceiling; you don't need to pass both.) The statement on origin on the commercial invoice is valid.

UK electronics reseller. A business imports assembled circuit boards from Taiwan, packs them into branded boxes in the UK, and exports them to German buyers. Packing and rebranding alone do not confer UK origin — the processing is insufficient. The goods remain Taiwanese-originating for TCA purposes. Claiming UK origin on the commercial invoice would be incorrect.

UK food producer. A business makes shortbread biscuits in Scotland using flour, butter, and sugar bought from UK suppliers. Careful: "bought from a UK supplier" is not the test. For the biscuits to be wholly obtained, the ingredients themselves must be wholly obtained or originating — wheat grown in the UK, butter from UK milk, sugar refined from UK beet. Much of the sugar sold in the UK is imported cane, which would fail. If every ingredient genuinely originates, UK origin is established; if not, the biscuits must qualify under the product-specific rule instead.

How to Declare Origin: The Statement on Origin

For most UK exporters, the mechanism for claiming TCA preference is the statement on origin — specific wording included on the commercial invoice (or any other commercial document describing the goods) that certifies the goods meet the relevant rules of origin. The statement includes your EORI number and references the agreement.

Don't confuse this with a supplier's declaration, which is a different instrument: a document your UK supplier gives you to evidence the originating status of the materials or inputs they sold you — needed, for example, when you're relying on cumulation. HMRC can audit the supplier's declarations sitting behind your statement on origin, so collect them before you claim, not after. See the detailed guide to the supplier's declaration for the exact wording and conditions.

Critically, you must retain the evidence that supports the statement — manufacturing records, material sourcing documents, supplier invoices and supplier's declarations — for the same retention period as the export records themselves. See how long to keep export records for the applicable timeframes.

What to Do If You're Unsure

If you're uncertain whether your goods meet the TCA rules of origin, the answer is not to claim preference and hope — it's to check the specific PSR for your product's HS code, map it against your actual manufacturing process, and if necessary consult HMRC's guidance or a customs specialist. If you can't evidence origin, don't claim it — your buyer paying the standard rate is cheaper for everyone than a retrospective duty demand plus penalties.