Preference is No Longer an ADD Shield — What UK Importers Must Do Now

The Blind Spot HMRC Just Closed

For years, a significant number of UK importers have operated on a dangerous assumption: that a valid preferential origin claim — and the 0% duty rate it carries — automatically neutralises any anti-dumping duty (ADD) exposure on the same goods.

It does not. It never did. But HMRC's declaration requirements, until recently, made it easy to conflate the two. The 28 March 2026 CDS update changed that. New origin declaration requirements now explicitly force importers to demonstrate they understand the distinction between preferential origin and non-preferential origin — and that they have correctly assessed both when making their declarations.

Why This Matters for Your Business

The practical consequence of conflating these two mechanisms is significant. An importer declaring preferential origin on goods that are also subject to ADD — without separately assessing and declaring the ADD position — is not protected by the preference claim. HMRC's audit approach now specifically targets this overlap.

The sectors most immediately affected are those where both preferential rates and ADD measures commonly coexist:

Sector	Common ADD Measures	Preferential Overlap Risk
Steel & aluminium	China, Russia, Ukraine origin goods	High — TCA and other agreements frequently claimed
Ceramics & porcelain	Chinese-origin tableware, tiles	Medium — often processed through third countries
Textiles & footwear	Multiple origin-specific ADD measures	High — complex supply chains, multiple origin claims
Bicycles & components	Chinese-origin, assembled goods	High — assembly operations complicate origin determination

The Declaration Problem

Prior to the March 2026 CDS update, it was technically possible to submit a declaration that claimed preferential origin without the declaration system flagging a potential ADD exposure on the same commodity code. This created a systematic gap — not necessarily through deliberate evasion, but through process failures in broker instructions, legacy classification systems and inadequate compliance oversight.

HMRC's position has always been clear: preferential origin and anti-dumping duty are assessed separately. What has changed is the enforcement mechanism. The new CDS origin declaration fields now require importers to actively engage with both questions, not just claim preference and move on.

HMRC's primary enforcement mechanism in customs compliance cases is the Schedule 36 Finance Act 2008 notice — a formal information request that compels production of records within a statutory deadline. Once a Schedule 36 notice is issued, the compliance check is no longer informal or discretionary. The documents you produce — or fail to produce — directly determine the duty assessment that follows. For importers with historical ADD declarations that have not been reviewed against their preferential origin claims, a Schedule 36 notice represents the start of an expensive and disruptive process, not a warning shot.

The consequence of getting this wrong is not a minor administrative correction. Where ADD has been systematically underpaid — even without deliberate intent — HMRC issues a C18 Post Clearance Demand Note for the outstanding liability. Critically, a C18 carries statutory interest calculated from the date of original import, not from the date of issue. This means historical ADD underpayment compounds silently over time. An importer who has been incorrectly offsetting preferential rates against ADD exposure for three years does not face three months of interest — they face three years of it, on the full underpaid amount, plus the possibility of civil evasion penalties where negligence is found.

Your Immediate Action Plan

• 1 Audit the overlap. Map every commodity code in your import portfolio where you are claiming a preferential rate. Cross-reference against the current UK Global Tariff ADD measures schedule. Where both apply, you have a potential exposure that needs to be assessed individually.
• 2 Verify, don't assume. A preference claim on paper — even a valid one backed by a correctly completed supplier declaration — is not an audit defence against ADD circumvention allegations. HMRC will look at the economic substance of the origin claim, not just the paperwork.
• 3 Update your CDS declaration logic. Work with your customs broker or freight forwarder to ensure that your CDS entries now explicitly address non-preferential origin (for ADD purposes) separately from preferential origin (for duty rate purposes). These are different data fields requiring different evidence.
• 4 Review your supplier declarations. If your preferential origin claims are based on supplier declarations, check whether those declarations are still current, correctly completed and cover the specific goods on which ADD measures apply. Suppliers sometimes issue blanket declarations that do not hold up under scrutiny.
• 5 Consider voluntary disclosure. If your review identifies historical declarations where ADD was not correctly assessed alongside a preferential claim, voluntary disclosure to HMRC — before they initiate an enquiry — significantly reduces the risk of penalties. The C285 amendment procedure is available for overpayments; underpayments carry greater risk, particularly under an active compliance programme.

The Broader Compliance Signal

This update does not exist in isolation. HMRC's increased focus on the preferential-ADD overlap is part of a wider compliance programme targeting declaration accuracy across high-risk import categories. The investment in CDS enforcement tooling, the increase in Schedule 36 information requests to importers and the growing number of post-clearance audits all point in the same direction: HMRC has the data infrastructure to identify systemic declaration errors, and it is using it.

For importers operating at scale — particularly in manufacturing, infrastructure procurement and chemicals — the cost of inaction materially exceeds the cost of a structured compliance review. A forensic audit, once initiated, is significantly more expensive and disruptive than a proactive exposure assessment.

The customs landscape is tightening. The businesses that will navigate it without material consequence are those that understand their obligations at the intersection of multiple regulatory mechanisms — not just the ones that apply in isolation.