UK customs debt liability: who pays when duties are underpaid
HMRC guidance clarifies customs debt liability rules for underpaid import and export duties in the UK. The guidance explains who is responsible for settling duty shortfalls, how HMRC enforces collection, and the legal obligations of importers, exporters, and customs agents. This affects all UK traders moving goods across borders and those using freight forwarders or customs brokers.
Photo: www.kaboompics.com / PexelsHMRC clarifies customs debt liability for underpaid duties
HMRC has published updated guidance on customs debt liability, setting out the rules for who bears responsibility when import or export duties are underpaid in the UK. Published 17 June 2026, the guidance applies to all traders, freight forwarders, and customs agents handling goods subject to UK customs procedures.
Who is liable for customs debt?
Customs debt arises when duty payments fall short of the amount owed on imported or exported goods. HMRC's guidance establishes the chain of liability:
- Importers and exporters remain the primary liable party for duty shortfalls on goods they move across UK borders.
- Customs agents and brokers may share liability if they failed to calculate or declare duties correctly on behalf of a client.
- Declarants (the person or entity submitting the customs declaration) are responsible for the accuracy of information provided to HMRC.
The guidance emphasizes that liability is not automatically transferred to third parties, even where a freight forwarder or customs broker is instructed to handle the clearance.
How HMRC enforces customs debt
When HMRC identifies an underpayment, it issues a demand for the outstanding amount. The guidance outlines:
- HMRC will pursue the person or entity liable under customs law to recover the debt.
- Interest and penalties may be added to the principal duty shortfall if the underpayment resulted from negligence or fraud.
- Traders have the right to appeal HMRC's assessment through the standard appeals process.
Key obligations for traders
To avoid customs debt liability, traders must:
- Ensure accurate HS classification of goods before declaration.
- Declare the correct value, origin, and quantity to HMRC.
- Verify that their customs broker or freight forwarder is calculating duties correctly.
- Keep records of all duty payments and declarations for audit purposes.
- Report any errors or underpayments to HMRC promptly.
Disputes and appeals
If a trader disagrees with HMRC's assessment of customs debt, the guidance sets out the appeals process. Traders can request a review of the decision and, if unresolved, escalate to the tribunal system.
What this means for shippers
All UK importers and exporters must verify that duties are calculated and paid correctly on every declaration—errors or omissions create legal liability and financial exposure. Freight forwarders and customs brokers must ensure their duty calculations are accurate; clients remain ultimately liable even where an agent handles clearance. Review your customs declarations and duty payments now, and flag any underpayments to HMRC immediately to reduce penalties. Use a reliable customs invoice and landed-cost tool to calculate duties before submitting your declaration and avoid surprises at clearance.
