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Rules of origin: how to claim the tariff you just negotiated, and keep it

A trade agreement does not give you a lower tariff. It gives you the right to claim one — if you can prove origin, and keep that proof for years.

7 min readSophons AI

Britain now trades under more agreements than at any point since 1973. Each one lowers tariffs on paper. None of them lowers a tariff automatically.

What an agreement actually gives you is the right to claim a preferential rate, provided the goods qualify under that agreement's rules of origin and you can prove it. Claim without the proof and you have not saved money — you have borrowed it from HMRC at an interest rate you will discover later.

Where goods come from is not where they were shipped from

This is the misunderstanding that costs the most. Origin is not the country of dispatch, the supplier's address, or where the invoice was raised. It is where the goods were produced or last substantially transformed under the rules of the specific agreement you are claiming under.

Goods that were wholly obtained in a country — grown, mined, born and raised there — are straightforward. Almost nothing in manufacturing is that simple. A product assembled in one country from components sourced across three others qualifies only if it meets a rule, and the rule differs by product.

Three kinds of rule do most of the work:

  • Change of tariff heading — the finished goods sit under a different code from the imported materials.
  • Value added — non-originating materials stay below a percentage of the ex-works price.
  • Specific process — a named operation must happen in the territory, common in textiles and chemicals.

Which one applies depends on the commodity code and the agreement. The same physical product can qualify under one agreement and fail under another.

Two things that look like origin and are not

Minimal operations. Repacking, sorting, labelling, simple assembly, affixing a logo — none of these confer origin. Bringing goods into the UK, putting them in a box with your name on it and exporting them does not make them British.

Cumulation. Most agreements let you treat materials from the partner country as originating for the purposes of the rule. Some allow wider cumulation across a group of countries. This can rescue a product that would otherwise fail, but only where the agreement provides for it — you cannot assume it.

The paperwork that has to exist before you claim

Every declaration claiming preference carries a preference code, and CDS will reject the entry if that code is not compatible with the commodity code. That is the easy validation. The hard one comes later.

Behind the claim you need proof of origin. Depending on the agreement, that is a statement on origin made out by the exporter on the invoice, or importer's knowledge, where you hold enough information about the production to be satisfied yourself. Either way, the burden sits with the person claiming.

You also need supplier declarations for materials you did not produce, and you need them dated to cover the shipments they support.

The part people get wrong: retention

Origin evidence has to be kept for years after the import, and HMRC verification requests do not arrive the week after clearance. They arrive long after the goods have been sold, the purchase order is archived, and the person who arranged the shipment has left.

If the evidence cannot be produced, the preference is disallowed and the duty becomes payable, with interest, across every affected entry — not just the one they asked about.

File origin evidence by product and supplier, not by shipment. When HMRC asks, they ask about a product line over a period. A folder organised by container number is close to useless at that point.

A worked example

A UK distributor imports stainless fittings from a partner country under a preferential agreement, claiming zero duty on £400,000 of goods a year against a 6% standard rate. That is £24,000 a year saved, correctly claimed.

Three years later a verification arrives. The supplier has changed its component sourcing and cannot produce a statement covering the earlier period. The preference is disallowed across three years: £72,000, plus interest, on goods already sold at a margin that assumed the saving.

Nothing dishonest happened anywhere in that chain. The paperwork just did not keep up with the trading.

Do this before your next preferential shipment

  1. Identify which agreement each import actually moves under.
  2. Look up the origin rule for that commodity code under that agreement — not a similar one.
  3. Get the statement on origin, or satisfy yourself under importer's knowledge, before you claim.
  4. Collect supplier declarations covering the period, not the parcel.
  5. File everything by product and supplier, and diary a review whenever a supplier changes sourcing.

If you are moving into India under the new agreement, the same discipline applies from day one — see what the UK–India deal actually changes.

And the commercial side

Being able to supply under preference is a genuine selling point, and almost nobody says so on their website. "We supply into India under CETA at preferential rates, with origin documentation provided" is the kind of sentence a buyer searches for and an AI assistant can quote. If it exists nowhere on your site, you are competing on price against businesses who simply mentioned it.

Get AI growth plan and we will start with what your buyers can currently find.

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