HMRC Investigations and Tax Evasion

About HMRC Investigations and Tax Evasion

Tax evasion is the deliberate and dishonest underpayment or non-payment of tax. It is distinguished from tax avoidance, which involves using legal means to reduce a tax liability. Criminal prosecution for tax evasion can be brought under several statutes. The most common are the Fraud Act 2006 (fraud by false representation, carrying up to ten years), the common law offence of cheating the public revenue (which carries a maximum of life imprisonment), and the Criminal Finances Act 2017, which introduced a corporate offence of failure to prevent the facilitation of tax evasion.

HMRC has a specialist criminal investigation directorate — the Fraud Investigation Service — which handles the most serious cases. They have powers to obtain production orders for financial records, to search premises, to require information from banks and financial institutions, and to compel the production of documents. HMRC can also apply for restraint orders to freeze assets during an investigation. When HMRC decides to pursue a criminal rather than civil route, it is because they consider the alleged evasion to be deliberate, sustained, and significant in value.

The investigation process typically begins long before the suspect is aware of it. HMRC may analyse tax returns, cross-reference data from banks and other financial institutions, receive intelligence from informants, or identify discrepancies through their Connect data analysis system. By the time you are invited for interview under caution, the investigators will have formed a detailed view of the case. The questions they ask are designed to close off defences and secure admissions.

Defending tax evasion cases requires an understanding of both criminal law and tax law. The prosecution must prove dishonesty — that the defendant knew they were understating their tax liability or concealing income. If the discrepancy was the result of genuine error, misunderstanding of complex tax rules, reliance on professional advice, or poor record-keeping rather than deliberate evasion, the case for dishonesty may not be made out. Demonstrating this requires careful analysis of the tax position and the circumstances in which the returns were prepared.

Why Early Representation Matters

The HMRC interview under caution is the critical moment in most tax evasion investigations. The investigators will have analysed your financial records in detail and structured their questions to establish dishonesty. We prepare you thoroughly for that interview — reviewing the tax position, identifying the explanations for any discrepancies, and advising you on whether to answer questions, provide a prepared statement, or exercise your right to silence. The strategy for the interview must be informed by a detailed understanding of both the financial evidence and the criminal law.

We work with forensic accountants and tax specialists to examine the financial evidence independently. HMRC's calculations and assumptions are not always correct, and their interpretation of complex transactions is not always the only reasonable interpretation. Challenging their analysis with expert evidence can significantly weaken the prosecution case or, in some cases, demonstrate that no criminal offence has been committed.