Trade Agreements, Rules of Origin & Reducing Duties

Why trade agreements matter to UK exporters

When the UK left the EU, one of the most significant practical questions for exporters was what would happen to the duty rates their buyers faced when importing UK goods. The answer depends almost entirely on whether the UK has a trade agreement with the destination country — and whether the goods qualify to use it.

A trade agreement between two countries or trading blocs is, among other things, a commitment to reduce or eliminate import duties on qualifying goods traded between them. For UK exporters, this matters because your buyer’s cost of importing your goods directly affects the commercial relationship. A buyer in a country with a UK trade agreement may be able to import your goods at zero or reduced duty — but only if the goods meet the rules of origin set out in that agreement, and only if the right documentation is in place to claim it.

The UK has trade agreements in place with a significant number of countries, including the EU, Japan, Canada, Australia, New Zealand, Singapore, South Korea, and the member countries of CPTPP (the Comprehensive and Progressive Agreement for Trans-Pacific Partnership). The terms, the duty reductions available, and the rules of origin requirements differ between each agreement. Knowing which agreements apply to your markets — and whether your goods actually qualify — is where the commercial value sits.

The UK Global Tariff — the starting point without preference

Where no trade agreement exists, or where goods do not meet the rules of origin required to claim preference, the applicable duty rate is the UK Global Tariff — the standard rate applied to imports into the UK from countries without a preferential arrangement. When exporting, the equivalent is the MFN (Most Favoured Nation) rate applied by the destination country — the standard duty rate that applies to all imports not covered by a preferential agreement.

Understanding the MFN rate for your goods in your key markets gives you a baseline: how much duty is your buyer currently paying, and what could they save if your goods qualified for preference? The government’s Check Duties and Customs tool allows you to look up duty rates by commodity code and destination country — including whether a preferential rate is available and what it is.

For many exporters, running this check for their main markets is genuinely illuminating. In some cases the duty saving available under a trade agreement is significant enough to be a real commercial differentiator — your goods land cheaper than a competitor’s from a country without a preferential arrangement.

Rules of origin — the qualifying condition

Trade agreements do not automatically apply to all goods traded between two countries. To benefit from a preferential duty rate, goods must be shown to originate in the UK — and origin, in this context, has a specific legal meaning that goes beyond where a product was packed, labelled, or dispatched from.

Origin refers to the economic nationality of the goods — the country where they were genuinely produced, grown, or manufactured. There are two ways goods can be considered to originate in the UK.

Wholly obtained goods are those produced entirely within the UK, with no materials from any other country involved. Agricultural products grown in the UK, animals born and raised here, and products made exclusively from UK-sourced materials all fall into this category. For businesses that manufacture using only UK-sourced inputs, this is a straightforward test to meet.

Sufficiently processed goods are those that include materials or components from other countries, but where enough work has been done in the UK to confer UK origin. This is where it gets more involved. What counts as sufficient processing varies by product and by trade agreement. In broad terms, simple operations — repacking, relabelling, cleaning, or basic assembly — are not enough. The processing must genuinely transform the goods, changing their nature or classification in a meaningful way.

The specific tests used to determine whether goods are sufficiently processed differ between agreements. Some use a value-added rule, setting a maximum percentage of non-originating content. Some use a change of tariff classification rule, requiring that the finished product sits in a different commodity code heading to the materials used to make it. Some use product-specific rules that prescribe exactly what processes must take place. In many cases, a combination of rules applies — and the rules for the same product can differ between the UK-EU agreement and the UK-Japan agreement, for example.

This is the area where businesses most commonly discover that their assumptions about origin are not as solid as they thought — particularly where supply chains involve materials or components sourced from outside the UK. A sourcing change that made commercial sense can inadvertently affect whether goods still meet the rules for a key market, and this is not always picked up until something prompts a review.

How to establish whether your goods meet the rules, how to check the product-specific requirements on the Trade Tariff, and how to maintain the evidence to support an origin declaration are covered in our How to Apply Trade Agreements and Rules of Origin course.

Exporting to the EU — what has changed and what to be aware of

The EU remains the UK’s largest trading partner, and the UK-EU Trade and Cooperation Agreement (TCA) provides for zero tariffs on qualifying goods traded between the UK and EU member states. That is a significant benefit — but it comes with conditions that not all UK exporters have fully worked through since Brexit.

The TCA rules of origin are product-specific and in some cases demanding, particularly for manufactured goods and products with complex supply chains. Businesses that source components or materials from outside the UK need to consider whether their finished goods still meet the rules — and businesses that have not reviewed their origin position since the TCA came into force may be in for a surprise. Our Trading with the EU course covers the full picture of exporting to the EU post-Brexit, including rules of origin, documentation, and customs requirements on both sides.

Reducing duties through special procedures

Beyond trade agreements, there are customs special procedures that allow businesses to reduce, suspend, or reclaim duties in specific circumstances. Inward Processing allows goods to be imported, processed or manufactured, and then exported without paying import duties on the original materials. Outward Processing allows goods to be temporarily exported for processing or repair and reimported with duty relief on the work done abroad. Customs warehousing allows goods to be stored without paying duties until they are released for use or onward export.

These procedures exist to support businesses with particular trading models — manufacturers who import raw materials, businesses who send goods abroad for repair, traders who hold stock for multiple markets. They are not relevant to every exporter, but for those they do apply to, the duty savings can be substantial.

Each procedure has its own authorisation requirements, conditions, and compliance obligations. They are worth understanding at a high level so that you know whether they are worth exploring further for your business. If you would prefer to talk it through with a specialist, our team is happy to help at team@exporter-services.co.uk.

Common mistakes around trade agreements and duties

Assuming the agreement covers your goods. Having a trade agreement with a country does not mean all goods trade at zero duty. The applicable rate depends on the commodity code, and some goods are excluded or subject to quotas even within preferential arrangements.

Not checking whether goods actually qualify. The rules of origin are the qualifying condition for preference, and they are not always straightforward. Goods that include materials or components sourced from outside the UK may not meet the rules — and claiming preference when goods do not qualify is a compliance issue with consequences for your buyer.

Leaving preference unclaimed. The opposite problem is also common. Some exporters do not realise their goods qualify for preference, or do not put the right documentation in place to allow the buyer to claim it. The duty saving goes unclaimed, which is a missed commercial opportunity and potentially a competitive disadvantage.

Not reviewing origin position after supply chain changes. A sourcing change that made commercial sense — switching to a cheaper supplier in a different country — can inadvertently affect whether goods still meet the rules of origin for a key market. This is the kind of thing that does not always get picked up until something prompts a review.