If HMRC suspects you of tax fraud, the consequences can escalate fast. This guide explains what an hmrc criminal investigation involves, what powers HMRC can use against you, and why instructing a specialist like Wilkstone Law Solicitors immediately is the single most important step you can take.
Key Takeaways
- HMRC criminal investigations are reserved for serious cases of deliberate tax evasion, fraud, or dishonest conduct and can result in a prison sentence of up to 14 years, unlimited fines, confiscation proceedings, and account freezing orders.
- Early expert advice from a specialist hmrc criminal investigation solicitor can sometimes divert your case into the contractual disclosure facility under Code of Practice 9, helping you avoid prosecution entirely.
- A solicitor (not just an accountant) is essential to secure legal professional privilege, manage all contact with hmrc’s fraud investigation service, and protect your liberty, reputation, and assets.
- If you have received notice from HMRC or suspect you are under investigation, stop speaking to HMRC without advice, preserve all records, and arrange an urgent confidential consultation with a specialist solicitor today.
What Is an HMRC Criminal Investigation?
An hmrc criminal investigation is a formal inquiry conducted by HMRC’s fraud investigation service into suspected deliberate tax fraud or fraudulent evasion. This is fundamentally different from routine hmrc enquiries or civil compliance checks.
These investigations are launched where HMRC suspects there has been dishonest conduct causing significant tax loss, or where a strong deterrent message is needed.
Common triggers include:
- Large unexplained bank deposits or lifestyle inconsistencies
- Cash-based businesses with poor records
- Offshore accounts or undisclosed trusts
- Use of aggressive avoidance schemes or false or forged documents
- Whistleblower reports or data from foreign tax authorities under post-2017 CRS exchanges
Since around 2010–2012, most criminal prosecutions in England and Wales have been handled by the crown prosecution service. Convictions for serious tax fraud can bring unlimited fines and sentences of up to 7 years for cheating the public revenue, with some statutory maximums doubled to 14 years under the Finance Act 2024.
An hmrc criminal investigation is far more intrusive than a civil enquiry. It can involve arrests, search warrants, seizure of digital devices, and interviews under caution, all recorded for use in criminal litigation.
When Will HMRC Use Criminal Investigations Instead of Civil Action?
HMRC usually prefers civil procedures such as Code of Practice 9 and the contractual disclosure facility, but will escalate to a criminal investigation in defined circumstances.
Key situations where hmrc criminal investigations are likely include:
- Organised VAT repayment fraud or carousel fraud
- Missing trader (MTIC) schemes involving organised criminal gangs
- Bogus VAT registration
- Repeated deliberate under-declarations of income or gains
- Materially false statements on tax returns
HMRC may also choose the criminal route where there is a clear public interest in deterrence, for example where professional advisers have facilitated tax fraud, where high-profile individuals are involved, or where earlier warnings have been ignored.
HMRC guidance indicates that civil investigations under COP9 are typically used where the taxpayer is prepared to make full disclosure. A criminal investigation is more likely where there is suspected deliberate concealment, forged documents, or money laundering.
Receiving a Code of Practice 9 formal letter is a strong warning sign that hmrc suspects serious fraudulent behaviour. Urgent discussion with a criminal investigation solicitor is needed to decide whether to accept the CDF or contest the allegations.
HMRC’s Powers in Criminal Investigations
HMRC criminal investigators hold powers comparable to police, derived mainly from PACE 1984, the proceeds of crime act 2002, and the Criminal Finances Act 2017 (often referred to as the crime act provisions).
Dawn raids involve early-morning execution of search warrants at homes and business premises, with seizure of paper records, computers, phones, and sometimes stock. An hmrc officer can conduct criminal investigations with the authority to arrest without warrant for indictable offences and to conduct interviews under caution.
Financial powers are equally formidable:
- Production orders compelling banks and payment processors to hand over records
- Account freezing orders under POCA, often granted without notice
- Restraint orders preventing you from dealing with assets worldwide
- Confiscation orders after conviction to recover the alleged benefit of crime
In serious cases, HMRC also has access to intrusive surveillance powers and communications data under investigatory powers legislation. These powers are subject to external oversight but remain highly invasive for the taxpayer under investigation.
Account Freezing Orders, Restraint & Confiscation
One of the most alarming aspects of hmrc criminal investigations is the sudden loss of access to your business and personal funds.
Account freezing orders allow HMRC to apply to the Magistrates’ or Crown Court to freeze UK bank accounts suspected of holding criminal property, often without prior notice. These are granted under sections 303Z1–303Z8 of POCA 2002 as amended by the Criminal Finances Act 2017.
Restraint orders under the proceeds of crime act can restrict disposal of property worldwide, including homes, vehicles, and business assets, pending the outcome of an hmrc fraud investigation. Court orders of this kind are broad and can freeze everything you own.
Confiscation orders follow conviction. The court calculates the “benefit” from criminal conduct, applies assumptions about lifestyle, sets strict payment deadlines, and can impose further imprisonment for non-payment regardless of actual current wealth.
A specialist solicitor can challenge or vary these orders, argue proportionality, and protect funds needed for business operations, legal fees, and reasonable living expenses. In one notable case, a solicitor successfully opposed an AFO application involving approximately £250,000, demonstrating these orders are not unassailable.
Contractual Disclosure Facility (CDF) and Code of Practice 9
The contractual disclosure facility under Code of Practice 9 is HMRC’s main civil route for dealing with serious tax fraud where criminal proceedings may be avoided in exchange for full disclosure.
The CDF offer works like this: in return for an honest, complete outline disclosure within a 60-day deadline and a detailed report later, HMRC will usually provide immunity from criminal prosecution for the disclosed conduct involved.
Accepting CDF is an admission of deliberate hmrc tax fraud and must not be done lightly. Declining it can expose you to a full criminal investigation and tax fraud prosecution if HMRC believes fraud has occurred. And if your disclosure is incomplete, the immunity vanishes and everything you disclosed can be used against you in a criminal case.
This is why specialist advice is critical: assessing whether alleged behaviour is genuinely “deliberate,” preparing the outline disclosure, managing interaction with the fraud investigation service, and negotiating tax liability, interest, and penalties. In some cases, early voluntary disclosure before HMRC contacts you can improve penalty outcomes and reduce the risk of hmrc criminal investigations altogether.
Solicitor or Accountant: Who Should Lead Your HMRC Criminal Investigation Response?
Both accountants and solicitors play important but different roles in tax investigations. However, the lead should always be a criminal investigation solicitor.
The critical distinction is legal professional privilege. Communications with solicitors and experts they instruct can generally be kept confidential from HMRC, whereas direct discussions with an accountant may be disclosable.
A solicitor can instruct a forensic or tax accountant on your behalf to analyse records, reconstruct accounts, and prepare reports while preserving privilege and maintaining a unified defence strategy.
Only solicitors and barristers can:
- Advise on criminal law and the risk of a criminal sanction (or only a criminal sanction in the most serious cases)
- Represent you at police-style interviews under caution
- Advise on plea decisions, court tactics, and sentencing risk
- Attend interviews and appear in criminal courts
The recommended approach is a team led by an hmrc criminal investigation solicitor who coordinates accountant input, manages all hmrc correspondence, and ensures every response is consistent with your legal defence.
How an HMRC Criminal Investigation Solicitor Can Help
A specialist solicitor provides practical, step-by-step support from first contact through to potential trial and confiscation proceedings.
Early-stage services include urgent advice before or during dawn raids, ensuring search warrants are lawfully executed, preventing unlawful seizure, and obtaining inventories of items removed.
Interview representation means preparing a strategy (no comment, selective answers, or prepared statement), protecting against oppressive questioning, and ensuring interviews are properly recorded. The solicitor will attend interviews with you.
Ongoing case management covers challenging production orders, making representations to HMRC and CPS to avoid prosecution, and where appropriate arguing for a civil settlement or financial settlement via CDF instead of criminal charges. Responding appropriately at every stage is essential.
Trial and post-trial work involves preparing witness evidence and expert reports, contesting HMRC’s unpaid tax and tax owed calculations, mitigating sentence if conviction occurs, and defending confiscation proceedings and account freezing order applications. The goal is always the best possible successful outcome.
Stages of an HMRC Criminal Investigation
Understanding the typical chronology helps you prepare for what lies ahead.
Pre-investigation intelligence gathering: HMRC collates data from banks, card processors, overseas tax authorities, Companies House, and open-source material before you are even aware. In 2024/25, HMRC opened 446 criminal investigations, with decisions to prosecute rising 11% year-on-year.
First contact: This may come as dawn raids, arrests, or a formal letter inviting you to an interview under caution. If you have received notice of any kind, contact a solicitor immediately.
Investigation phase: Analysis of seized material, further action through production orders, interviews with third parties (suppliers, customers, staff), and use of specialist FIS teams for complex or cross-border structures. A significant amount of time may pass during this phase.
Decision phase: HMRC and CPS assess the evidence and public interest, leading to outcomes such as no further action, civil settlement, caution, or criminal charges. In 2024/25, HMRC recorded 281 convictions with a roughly 91% success rate. Over half resulted in custodial sentences averaging 35 months.
What To Do If You’re Facing an HMRC Criminal Investigation
Immediate, calm, and structured action can significantly affect the outcome of your case.
- Do not ignore any letters, phone calls, or notices from HMRC, but avoid contacting HMRC directly until you have spoken to a solicitor from a specialist law firm who can take over communication.
- Preserve all records: Gather tax returns, bank statements, invoices, PAYE records, VAT workings, and internal emails. Do not destroy or alter documents. Destruction can itself be a criminal offence.
- Prepare a factual chronology for your solicitor, including key dates such as when returns were filed, when hmrc correspondence was received, and any advice previously taken. Avoid speculation or self-incrimination in writing.
- Arrange an urgent, confidential consultation with an hmrc criminal investigation solicitor to review the HMRC letter or warrant, discuss your tax affairs, agree an immediate response strategy, and determine whether further action from HMRC can be pre-empted.
Choosing the Right HMRC Criminal Investigation Solicitor
Not all criminal lawyers understand the technical and tactical issues in hmrc tax investigation cases. Specialist experience is crucial.
Look for:
- A proven track record and long track record handling fraud investigation service cases
- Knowledge of COP8, COP9, and the contractual disclosure facility
- Familiarity with account freezing orders, restraint, and confiscation under the proceeds of crime act
- Experience with both individuals and companies, including serious cases involving cross-border or offshore hmrc tax issues
- Strong relationships with forensic accountants who can provide expert evidence
Ask how the firm approaches interviews under caution, whether they handle judicial review challenges, and how they manage urgent situations such as dawn raids. Clear communication, transparency on costs, and availability are non-negotiable. A firm that understands hmrc policy and can help you avoid prosecution where possible is worth its weight in gold.
HMRC has announced a target to increase criminal charging decisions for the most harmful frauds by 20% by 2029–30. The time to act is now.
FAQ: HMRC Criminal Investigations
How long does an HMRC criminal investigation usually take?
Investigations often last many months or several years, particularly in complex fraud cases involving large volumes of financial data, overseas enquiries, or multiple entities. Limitation periods for serious tax fraud are long, and HMRC can usually look back up to 20 years for deliberate behaviour, meaning even older conduct involved can be examined. During this time, your solicitor’s role is to push for clarity on timescales, challenge unnecessary delay, and seek early indications of whether prosecution is likely. Recoveries from hmrc criminal investigations reached £1.5 billion in 2024/25.
Can HMRC investigate my company and me personally at the same time?
Yes. HMRC frequently investigates companies and individual directors or shareholders simultaneously where alleged tax fraud arises from corporate activity. Liability can fall on both the corporate entity and individuals for offences such as cheating the public revenue, fraudulent evasion of tax, or money laundering. A solicitor will assess potential conflicts of interest and, where necessary, arrange separate representation. This extends to situations involving evade tax allegations linked to organised criminal gangs.
Will HMRC tell my bank or employer about the investigation?
HMRC can obtain bank information covertly using production orders, so banks may know of the investigation even if they do not inform you. HMRC usually does not notify employers unless they are directly involved, but the risk of reputational impact increases if there is a dawn raid, arrest, or court appearance. Part of the solicitor’s role is to minimise unnecessary publicity and manage contact with third parties.
Is it ever a good idea to contact HMRC myself to “clear things up”?
Once there is any sign of an hmrc investigation or potential COP9 situation, direct contact without legal advice is risky. Unguarded explanations, documents sent out of context, or partial admissions can later be used to support criminal charges. All contact with HMRC should be channelled through a specialist solicitor experienced in criminal law who can control what is said, when, and in what form.
What happens if HMRC decides not to prosecute?
If HMRC and the crown prosecution service decide not to proceed with criminal charges, they may still pursue civil hmrc tax assessments, penalties, and interest. Your solicitor can then shift focus to managing civil negotiations, challenging assessments, appealing to the Tax Tribunal, or agreeing time-to-pay arrangements for any remaining tax liability. Avoiding prosecution is a major step, but careful handling of the remaining civil hmrc investigation is essential to protect your finances and ensure future compliance. Even without only a criminal sanction being imposed, serious consequences remain through civil penalties and interest on the tax owed.
