Five years of post-Brexit declarations. How much overpaid duty is sitting in Revenue?
Since 1 January 2021, Irish importers filing on GB-origin goods have been subject to EU customs declarations for the first time. Many have been filing with classification, valuation, and preference errors they do not know exist. MyCustomsInfo® audits your Irish declaration history under the EU UCC and identifies every recoverable overpayment.
Takes 2 minutes • No commitment • EUR pricing supported
Registered importers using an Irish EORI number in 2025
Of post-Brexit declarations that may contain errors Irish importers have never audited
EU UCC Article 121 recovery window for overpaid duty claims
Recovered for one Irish client from post-Brexit reclassification errors alone
Before Brexit, UK–Ireland trade was frictionless. Since 1 January 2021, it has not been.
Goods moving from Great Britain to Ireland became subject to EU customs declarations overnight. Many Irish importers, particularly those who had never had to think about customs before, have been filing declarations since 2021 with errors they do not know exist. That is now five years of potentially flawed declarations sitting in Revenue's Automated Import System.
Classification errors on GB-origin goods
Combined Nomenclature codes assigned pre-Brexit may no longer be correct under the EU's Common Customs Tariff. Goods that moved freely before 2021 now attract tariff liability, and many importers carried forward outdated codes without review.
Missed TCA preference claims
The UK-EU Trade and Cooperation Agreement provides for zero-tariff or reduced-tariff access on qualifying goods. Many Irish importers are paying full MFN duty on GB-origin goods that would qualify for preferential treatment under the TCA if properly documented.
Customs valuation carried forward without adjustment
UK-era pricing structures, transfer pricing arrangements, and valuation methodologies were carried into EU customs declarations without reassessment. Incorrect transaction values mean incorrect duty calculations on every affected entry.
Revenue Ireland is actively auditing. Self-initiated recovery is always preferable to a Revenue intervention.
Revenue publishes a UCC Customs Post Clearance Check Guide and runs active audit programmes. Irish importers face the same compliance scrutiny as UK importers under HMRC. The financial risk from declaration errors is the same. The difference is that there is significantly less market awareness of post-clearance audit tools available to Irish importers.
What a Revenue intervention looks like
Revenue's post-clearance checks examine declaration accuracy, tariff classification, customs value, and origin claims. Interventions can be desk-based or on-site. Where errors are found, Revenue issues a customs debt notification with interest applied from the date the original duty was due. Cooperation and voluntary disclosure are treated more favourably than discovery during audit.
How it differs from HMRC
Irish customs operates under the EU Union Customs Code, not the UK's Customs Declaration Service framework. The legal basis, the appeal procedures, and the penalty regime are different. Revenue's approach follows EU UCC Article 48 (post-clearance examination) rather than HMRC's C285 amendment process. MyCustomsInfo® covers both jurisdictions with the correct legal framework applied to each.
Why self-initiated recovery is better
If you identify and correct errors before Revenue does, you control the timeline, the documentation, and the narrative. A voluntary repayment application under Article 121 UCC demonstrates compliance maturity. Waiting for Revenue to find the errors means interest charges, potential penalties, and loss of control over the process.
The three-year window is still open
Article 121 of the EU UCC allows repayment applications within three years of the customs debt notification date. For declarations filed in 2023 and 2024, the recovery window is still open in 2026. Every month without an audit is a month closer to eligible claims expiring.
The legal basis for recovering overpaid duty in Ireland
Article 121 of the Union Customs Code provides for the repayment or remission of import duty where the amount of duty was not legally owed, or where it was entered in the accounts in error. The application must be submitted within three years of the notification of the customs debt.
Common grounds for an Article 121 application
Irish manufacturers importing covered products have CBAM obligations that layer on top of customs compliance.
The EU Carbon Border Adjustment Mechanism is now in its definitive phase. Irish importers of steel, aluminium, fertilisers, cement, electricity, and hydrogen must report embedded emissions and purchase CBAM certificates. Incorrect tariff classification directly affects CBAM scope. An importer who has misclassified steel products may also be underreporting CBAM obligations.
Classification drives CBAM scope
If your CN codes are wrong, your CBAM reporting is wrong. A duty recovery audit that corrects tariff classification simultaneously corrects your CBAM reporting baseline.
Definitive phase is live
CBAM quarterly reporting is mandatory. Certificates must be purchased to cover embedded emissions. Irish importers of covered products who have not prepared face financial exposure and potential penalties.
MyCustomsInfo® covers both
Duty recovery and CBAM compliance are audited in the same platform, in the same audit cycle. You do not need separate tools, separate data uploads, or separate consultants for each obligation.
Proven results in Ireland. Not a hypothetical.
Recovered in Ireland alone from post-Brexit reclassification errors.
MyCustomsInfo® audited three years of UK and Irish import declarations for a US-headquartered chemical manufacturer with production facilities in Germany supplying UK and Irish operations. The platform identified systematic post-Brexit reclassification errors on chemical compounds, cross-referencing declarations against the EU Common Customs Tariff. £123,000 was recovered in the UK and €56,000 in Ireland, for a combined recovery of £179,000+.
Results shown are from a confirmed client engagement and do not constitute a guarantee of future results. Revenue is the final decision-maker on all duty and classification matters.
“You are a UK company. Can you audit Irish declarations?”
Yes. MyCustomsInfo® is UK-based, but the platform's multi-jurisdictional coverage includes EU UCC jurisdictions. Irish declarations are audited under EU UCC rules, not UK CDS rules. The tariff classification library, the valuation methodology, and the legal basis for recovery claims all follow the EU framework when applied to Irish import data.
Multi-jurisdictional by design
MyCustomsInfo® covers UK (CDS/CHIEF), EU (UCC), and US (ACE) customs regimes. The platform applies the correct legal framework, tariff schedule, and recovery procedure for each jurisdiction.
EU Common Customs Tariff
Irish declarations are audited against the EU's Combined Nomenclature and Common Customs Tariff, not the UK Integrated Tariff. Preference claims are validated against the UK-EU TCA and other EU FTAs.
Revenue-ready documentation
The output of an Ireland audit is a Revenue-ready evidence package. This includes the corrected classification, the duty differential calculation, and the supporting documentation required for an Article 121 repayment application.
Irish importers with GB supply chain exposure
If you import goods from Great Britain into Ireland and have not audited your declarations since Brexit, you have exposure.
Irish manufacturers importing GB raw materials
Chemical compounds, components, and industrial inputs sourced from GB suppliers now attract EU customs duties. If your commodity codes have not been reviewed since 2021, your duty exposure is compounding with every consignment.
Book a compliance reviewDistributors and wholesalers with UK supply chains
Consumer goods, electrical products, and packaged foods sourced from GB distributors require EU customs declarations. Errors in valuation and classification are common where pre-Brexit pricing structures were carried forward.
Assess your Revenue exposureIrish subsidiaries of UK or US multinationals
Intra-group transfers from GB to Ireland are now customs transactions. Transfer pricing values may not align with customs valuation rules. Classification libraries applied at group level may not reflect the EU's Combined Nomenclature.
Talk to our enterprise teamAny Irish EORI holder who has never audited
Ireland has 46,232 registered importers using an Irish EORI number as of 2025. The majority have never conducted a post-clearance audit of their import declarations. If that includes you, the three-year recovery window under Article 121 UCC is still open for 2023 and 2024 declarations.
Start with a free reviewThe Irish customs software market has declaration-filing tools. It does not have a post-clearance audit platform.
Irish customs software is dominated by platforms that help importers file declarations. Custran, MIC Customs, and similar tools are filing platforms, not audit platforms. They help you submit declarations. They do not tell you whether those declarations were correct. MyCustomsInfo® occupies a different and largely uncontested position in the Irish market: retrospective post-clearance audit and duty recovery.
| Capability | MyCustomsInfo® | Declaration-filing platforms |
|---|---|---|
| Post-clearance declaration audit | ✓ | ✗ |
| Duty recovery identification | ✓ | ✗ |
| Article 121 UCC repayment documentation | ✓ | ✗ |
| Combined Nomenclature classification audit | ✓ | ✗ |
| Preference claim review (TCA, EU FTAs) | ✓ | ✗ |
| CBAM quarterly reporting support | ✓ | Some |
| Multi-jurisdiction coverage (UK + EU + US) | ✓ | EU only |
| Revenue-ready evidence packages | ✓ | ✗ |
| Per-client data isolation (dedicated S3 + KMS) | ✓ | Not disclosed |
| EUR pricing available | ✓ | ✓ |
Your recovery window is open. The clock is running.
Article 121 UCC allows three years to apply for repayment of overpaid duty. Declarations filed in 2023 are approaching their recovery deadline. Every month without an audit is a month of eligible claims that cannot be recovered.
+44 151 808 0103 • [email protected] • EUR pricing available