Importing from the UK after Brexit: CDS, UKCA, rules of origin

The UK is now a third country

For decades, buying Scotch whisky, automotive parts or British cosmetics from inside the EU meant no declaration and no duty. Since 1 January 2021 that world is gone. For EU buyers the United Kingdom is a third country; for US and Indian buyers it always was — but the post-Brexit rulebook reshaped how British goods are classified, marked and proven. Every shipment now needs a full customs declaration, an importer number, a proof of origin, and sometimes a sanitary check.

The upside: the EU–UK Trade and Cooperation Agreement (TCA) offers 0% duty and zero quotas between the two blocs. The catch: it is never automatic. It hinges on rules of origin, the correct conformity marking (UKCA or CE), and a clean declaration through CDS on the British side and your national system on yours. This guide untangles the three areas that cost importers the most when misunderstood.

CDS: the UK customs platform

On the British side, every declaration now flows through CDS (Customs Declaration Service), which replaced the legacy CHIEF system — first for imports, then for exports. If you import outside the UK, you do not file in CDS directly: your supplier or their forwarder handles the British export leg, and you declare the import through your own jurisdiction (ACE in the US, your national system in the EU, ICEGATE in India).

Three things must be flawless before the goods leave:

• A valid importer number both ends: a GB EORI for the exporter, your EORI / IEC / importer-of-record ID for you.
• Correct HS classification: the code drives the duty rate whenever preferential origin is not proven.
• A coherent customs value: the dutiable base must reflect the real transaction, with freight and insurance per the Incoterm.

A common trap: assuming "British goods" alone avoids duty. Without a valid proof of origin, customs applies the full MFN tariff even on a product 100% made in Manchester.

UKCA or CE: which conformity marking?

Conformity marking is the number-one blind spot. The rule depends on the direction of the flow:

For an EU importer the takeaway is one sentence: a product carrying only UKCA generally cannot be placed on the EU market without a fresh conformity assessment by an EU notified body. Verify this before ordering — especially for electronics, toys, PPE and machinery. US and Indian importers face their own marks (FCC/UL-style listings, BIS), so never assume a UK conformity mark satisfies your domestic regulator.

TCA rules of origin: the key to 0%

The TCA does not use the EUR.1 certificate. It runs on self-certification. To claim the zero tariff, two cumulative conditions:

1. The goods are originating in the UK (or EU): either wholly obtained or sufficiently transformed under the product-specific rule for their HS chapter.
2. Origin is proven: a "statement on origin" from the exporter, or documented "importer's knowledge".

Bilateral EU–UK cumulation is allowed: EU inputs incorporated in Britain count as British for the calculation. But non-originating components (say, from China) above the tolerance threshold strip the preferential origin. See our certificate of origin guide (for other agreements) and our customs valuation method to get the dutiable base right.

VAT, Northern Ireland and a practical checklist

Two operational points complete the picture. First, VAT or its equivalent: on import into the EU, import VAT is due on the customs value plus any duty; it is recoverable for a taxable business but ties up cash until the return, and postponed VAT accounting (where available) neutralises that timing gap. A US importer faces no federal VAT but should budget state sales or use tax and the MPF; an Indian importer pays IGST on the landed value. Second, Northern Ireland: under the Windsor Framework (2023), goods moving from Great Britain to Northern Ireland use a "green lane" (goods staying in NI) or a "red lane" (goods "at risk" of entering the EU), which changes the paperwork entirely.

Before every order, run this checklist: active importer numbers both ends, a confirmed HS code, a TCA statement on origin secured, a conformity marking suited to the destination market, and a clear Incoterm on who pays freight, insurance and clearance. Check the destination's prohibited and restricted lists too (sanitary, dual-use). A single missing link turns a "zero-duty" shipment into a surprise invoice.

Three worked examples

Example 1: British machine tool, $55,000, into the US

For a US buyer, UK origin gives no preferential break absent a deal — the MFN rate governs. Confirm the exact HS subheading: machine-tool rates range from free to a few percent, a swing of thousands of dollars.

Example 2: "Assembled in the UK" apparel, £20,000, into the EU

A "Made in UK" label is not origin. Mere assembly of Chinese fabric does not confer originating status, so the preference collapses. Always ask the supplier which product-specific rule they meet.

Example 3: British pharma ingredients, ₹40 lakh, into India

Timing matters: a deal that is signed is not yet a deal that is in force. Check the entry-into-force date and the tariff schedule for your HS line before pricing the preference into your margin.

Conclusion: 0% is earned, on paper

Importing from the UK in 2026 is no longer an internal transfer. Three reflexes protect your margin: demand a valid TCA statement on origin (or the full rate applies), check the conformity marking against the direction of flow (CE to enter the EU), and let a seasoned forwarder run the CDS and national declarations. For VAT mechanics and small-parcel thresholds, see our Regime 42 guide and our de minimis guide.