What a Customs Post-Clearance Audit Actually Looks Like

Introduction

For most finance directors, an HMRC customs audit belongs to the category of things that happen to other companies. Until it happens to yours. Post-clearance audits by HMRC's Customs Compliance directorate have been increasing in frequency since Brexit.

What Triggers a Post-Clearance Audit

Risk indicators include: high declaration volumes in a small number of tariff headings; frequent use of customs special procedures; declared customs values inconsistent with market prices; inconsistencies between import declaration data and VAT returns; and intelligence from foreign customs authorities.

What HMRC Requests

A post-clearance audit typically begins with a written information request covering 12 to 24 months seeking: complete import declaration data, commercial invoices, evidence of customs valuation methodology, proof of origin documentation, and the business's customs procedures manual.

The C18 Post-Clearance Demand

Where HMRC identifies an underpayment of duty, it will issue a C18 post-clearance demand. A C18 can be issued up to three years after the date of the import, with statutory interest on the unpaid duty from the date it was originally due.

What a Well-Prepared Business Looks Like

Businesses that emerge from audits without significant demands maintain organised, accessible customs records and demonstrate a consistent, documented approach to classification, valuation, and origin.

Proactive Audit Preparation

The most cost-effective time to prepare for an HMRC post-clearance audit is before one is announced. HMRC's own guidance on civil penalties is explicit: voluntary disclosure made before an audit is announced typically attracts no penalty beyond the duty and interest owed.

MyCustomsInfo® conducts post-clearance audit simulations and prepares businesses for HMRC review. Book a complimentary 30-minute assessment. Schedule your assessment.