Customs Compliance Health Check: How to Assess Your Import Risk

When was the last time you checked your customs declarations for errors? Research shows that 17% of UK import declarations contain mistakes, and most importers have no idea they are affected.

A structured customs compliance health check helps you uncover these issues before HMRC does—and before they turn into costly assessments, penalties, or missed savings.

What Is a Customs Compliance Health Check?

A customs compliance health check is a targeted review of your import declarations and supporting data. Instead of a full-scale audit, it focuses on the highest‑impact risk and savings areas, helping you to:

• Identify errors in your declarations
• Quantify overpayments of duty and import VAT
• Highlight non‑compliance risks that could trigger HMRC intervention
• Build a roadmap for process improvements and potential repayments

Typically, a health check reviews a defined period (e.g. the last 6–36 months) and concentrates on your largest value and volume flows.

Area 1: Classification Accuracy

Commodity classification is the foundation of customs compliance. An incorrect code can affect duty rate, origin, licensing, and trade remedies.

How to assess it:

1. Identify your top 20 commodity codes by volume and value.
2. Cross‑check each code against the UK Trade Tariff and relevant guidance notes.
3. Look for:

• Classification drift – the same product classified under different codes over time.
• Inconsistencies – similar products with different codes without clear justification.
• Legacy codes – codes carried over from old suppliers or brokers without review.

Key question: Can you clearly document the classification rationale for your main products?

Area 2: Valuation Methodology

Customs value is the basis for duty and import VAT. Even small valuation errors can compound into significant over‑ or under‑payments.

How to assess it:

1. Confirm which valuation method you use (e.g. transaction value under WTO rules).
2. Review sample entries to check that:

• Non‑dutiable charges (e.g. post‑import inland freight, certain discounts) are not incorrectly included in the customs value.
• Dutiable additions (e.g. assists, royalties, commissions, packing costs) are correctly added where required.

1. Compare commercial invoices, freight invoices, and customs declarations to ensure consistency.

Key question: Is your valuation methodology documented, repeatable, and aligned with HMRC guidance?

Area 3: Origin and Preference Utilisation

Origin determines duty rates, trade remedies, and preferential treatment under trade agreements. Many importers under‑use available preferences.

The average UK textile importer has a 53% preference utilisation gap—meaning more than half of eligible imports are not benefiting from reduced or zero duty.

How to assess it:

1. Calculate your preference utilisation rate:

• Identify imports that could qualify for preference under relevant FTAs.
• Measure how many of those imports actually used preferential rates.

1. Review origin documentation for validity and completeness:

• Supplier declarations / statements on origin
• Certificates of origin (where applicable)
• Long‑term supplier declarations for regular flows

1. Check that origin criteria (e.g. sufficient processing, product‑specific rules) are genuinely met.

Key question: Are you maximising available preferences while maintaining robust origin evidence?

Area 4: Procedure Code Correctness

The Customs Procedure Code (CPC) determines how goods are treated on import and which reliefs or suspensions you can use.

How to assess it:

1. Review your main CPCs and confirm they match the actual movement and use of the goods.
2. Check for missed reliefs, such as:

• Inward Processing (IP) – for goods imported for processing and re‑export.
• Returned Goods Relief (RGR) – for goods re‑imported after export.
• End‑use – for goods imported for a specific qualifying use.

1. Look for patterns where a standard release to free circulation is used by default, even when a relief could apply.

Key question: Are you using the most beneficial and compliant CPCs, or defaulting to the simplest option?

Area 5: Documentation Completeness

Even if your declarations are technically correct, poor documentation can create serious compliance risk during an HMRC audit.

How to assess it:

1. Confirm that every preference claim is backed by valid, retained documentation.
2. Check invoice‑declaration matching:

• Commercial invoice vs. customs entry (values, quantities, Incoterms, currency).
• Transport documents vs. declared freight and charges.

1. Ensure your audit trail is:

• Complete – all supporting documents are present.
• Organised – easily retrievable by entry number, date, or shipment.
• HMRC‑ready – you can respond quickly and confidently to queries.

Key question: Could you evidence your declarations within days, not weeks, if HMRC requested a sample?

Benchmark Your Results

Use the following benchmarks to gauge your risk and opportunity:

• 17% – average error rate on UK import declarations.
• 53% – average preference utilisation gap in the UK textile sector.
• 14% – average duty value flagged as overpaid across BorderAudit's client base.

If your review suggests you are close to or above these levels, there is likely material financial upside in correcting errors and reclaiming overpaid duties—alongside reducing your compliance risk.

Turning Insights into Action

Once you have completed your health check:

1. Prioritise issues by financial impact and compliance risk.
2. Correct future declarations by updating procedures, training, and broker instructions.
3. Explore repayment opportunities for historic overpayments where evidence supports a claim.
4. Establish a regular health check cycle (e.g. annually or semi‑annually) to maintain control.

A focused customs compliance health check is one of the fastest ways to improve duty efficiency, cash flow, and regulatory confidence in your import operations.