MTIC fraud and the Kittel principle arise in VAT disputes where HMRC believes a business has purchased goods or services connected to a fraudulent supply chain. HMRC may deny input tax on the basis that the business knew or should have known that its transactions were linked to VAT fraud. These cases are complex and can have serious financial consequences. Early advice is essential to protect your position and challenge HMRC’s conclusions.


At a glance

MTIC fraud involves missing trader VAT fraud within supply chains. HMRC applies the Kittel principle to deny input tax where it believes the trader knew or should have known about the connection to fraud. We help businesses respond to Kittel allegations, prepare evidence, demonstrate due diligence and challenge assessments through internal review or appeal.


What is MTIC fraud and how does it affect VAT?

MTIC fraud, also known as missing trader intra community fraud, occurs when businesses within a supply chain fail to account for VAT, leaving HMRC with a loss. Fraud often occurs at an earlier stage of the chain, but HMRC may still challenge input tax claims made by honest traders further down the chain.

Businesses may be affected even if they had no knowledge of the fraud. HMRC may investigate suppliers, customers and patterns of trading to identify whether the supply chain has been used for fraudulent purposes.

Summary: MTIC fraud is VAT fraud within supply chains that can affect businesses even if they were not directly involved.


What is the Kittel principle and when does HMRC apply it?

The Kittel principle comes from a European Court of Justice decision. It allows HMRC to deny input tax when it believes that a business knew or should have known that its transactions were connected to fraud. This is often referred to as the “knowledge or means of knowledge” test.

HMRC applies the Kittel principle in cases involving unusual trading patterns, high risk sectors or where there is evidence of inadequate due diligence. The test focuses on what the business knew at the time and whether it took reasonable steps to check the legitimacy of its supply chain.

Summary: The Kittel principle allows HMRC to deny input tax if it believes the business knew or should have known that its transactions were linked to fraud.


Why has HMRC denied my input VAT using the Kittel principle?

HMRC may deny input tax under the Kittel principle if it identifies concerns such as:

  • incomplete supplier due diligence
  • unusual pricing or high value transactions without clear rationale
  • rapid movement of goods with limited commercial explanation
  • unexplained changes in suppliers or customers
  • evidence of missing traders in the supply chain
  • irregular payment arrangements

HMRC often traces supply chains to identify fraudulent links. Where it believes the business did not take reasonable steps to protect itself, it may issue an assessment denying input tax.

Summary: HMRC denies input tax where it believes supply chain concerns or due diligence failures indicate knowledge of fraud.


What does HMRC expect in terms of supply chain due diligence?

HMRC expects businesses to carry out proportionate due diligence to check that suppliers and customers are legitimate. This may include:

  • verifying VAT registration
  • checking trading history
  • obtaining proof of identity and address
  • reviewing contracts, invoices and payment terms
  • considering whether the pricing is commercially realistic
  • assessing the credibility of the trading model

HMRC also expects businesses to record due diligence checks and maintain a clear audit trail. Failure to do so can lead HMRC to conclude that the business should have known about questionable transactions.

Summary: Businesses must keep evidence of reasonable due diligence to protect their position in VAT disputes.


What evidence do you need to challenge a Kittel assessment?

Challenging a Kittel assessment requires strong documentation. Useful evidence may include:

  • contracts and purchase orders
  • invoices and delivery records
  • bank statements showing payments
  • correspondence with suppliers or customers
  • due diligence records
  • business plans or commercial rationale
  • records of checks carried out before trading

This evidence helps establish that the business acted responsibly and did not know or suspect that the transactions were linked to fraud.

Summary: Clear documentation and proof of responsible trading are essential to challenge a Kittel decision. Our team can help you put the evidence together in a clear and understandable format to help remove the threat of a claim.


Can you appeal a Kittel or MTIC related VAT assessment?

Yes. You can request an internal review by HMRC or appeal to the First tier Tribunal. An appeal may be appropriate if you believe HMRC has misunderstood the transactions, misapplied the Kittel test or overlooked key evidence.

Appeals require detailed submissions and well organised evidence. Tribunal outcomes often depend on whether the business can show it took reasonable steps to verify its supply chain.

Summary: Kittel decisions can be appealed, but require strong factual and documentary evidence. Our team regularly deals with Kittel appeals and can help you with these.


What are the consequences of an MTIC or Kittel decision for your business?

The consequences can be significant. HMRC may:

  • deny input tax
  • issue VAT assessments
  • charge interest on the assessment
  • impose penalties depending on the behaviour involved

A denial of input tax can affect cash flow and trading. HMRC may also increase scrutiny of future returns or require additional evidence before processing repayment claims.

Summary: Kittel decisions can lead to substantial financial liabilities and increased HMRC scrutiny.


Can directors be personally affected by MTIC or Kittel allegations?

In most cases Kittel decisions affect the business, not individual directors. However, where HMRC believes that a director deliberately facilitated or ignored fraudulent activity, it may consider personal action. This is unusual and depends on the evidence.

Directors should ensure that proper due diligence processes are in place and that all trading decisions are made responsibly.

Summary: Personal exposure is rare, but directors must ensure responsible oversight of supply chain checks.


How should you respond to a Kittel letter or MTIC enquiry from HMRC?

The first step is to review your records and gather all relevant evidence. You should prepare a clear explanation of the trading activity, including due diligence carried out and the commercial rationale for the transactions.

It is important not to respond hastily. Incomplete or unclear explanations can lead HMRC to assume a lack of due diligence. A structured response supported by documentation gives the business the best chance of challenging HMRC’s conclusions. But it is vital to take legal advice before sending a response. It could be the difference between a quick conclusion and an expensive long running claim.

Summary: A clear, well evidenced response is essential to address a Kittel or MTIC enquiry.


How does FWJ help businesses facing MTIC or Kittel disputes?

We help businesses prepare detailed responses to HMRC, gather and organise evidence and challenge HMRC’s findings through internal review or appeal. We also advise on due diligence requirements and work to protect your position in complex supply chain disputes.

FWJ provides practical and experienced support to help businesses challenge MTIC and Kittel related VAT decisions.


Our brilliant MTIC fraud defence team

Our firm has a huge experience in dealing with and defending MTIC fraud claims.

  • Andy Lynch. Andy is an expert on a wide range of HMRC claims and before joining FWJ, he spent 18 years at HM Customs & Excise in their National Investigation Service. His experience is unrivalled in all types of HMRC claims including HMRC investigation defence, VAT claims, R&D tax credit defence, Account Freezing Orders, Tax Disclosure, Code of Practice 8 & 9 claims, winding up petition defence and much more.
  • Stephen Downie is a partner with significant tax experience and is also a qualified accountant and previously spent time working at the Insolvency Service.
  • Anita Sharma. Anita is a Senior Associate specialising in tax litigation and financial disputes with HMRC. She advises high-net-worth individuals and major commercial clients on appeals against HMRC decisions, complex tax assessments, and enforcement proceedings. Anita has secured interim relief following HMRC revocations to keep clients trading during appeals and is known for achieving practical, results-focused outcomes in high-value disputes.
  • Khaliq Martin. Khaliq is a Senior Paralegal in the tax disputes team assisting on a broad range of HMRC investigation and defence matters. Khaliq draws on his international litigation background and public sector experience to help prepare detailed evidence and submissions for use in appeals and settlement negotiations, ensuring cases are presented clearly, carefully and effectively.

Key contacts

Khaliq Martin

Khaliq Martin

Senior Paralegal

Anita Sharma

Anita Sharma

Senior Associate

Andy Lynch

Andy Lynch

Partner (Non-solicitor)

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