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Code of Practice 9 Advice for Individuals Facing HMRC Fraud Investigations

Code of Practice 9 Investigation Help

We provide specialist COP9 investigation help for individuals, directors, partners, and trustees that need an experienced tax adviser to review the position properly, explain the risks clearly and deal with HMRC in a structured way. Whether you have received a COP9 letter, need advice on the Contractual Disclosure Facility, or want to understand the implications of deliberate behaviour, penalties and possible escalation, we help you understand the position clearly and move forward with confidence.

  • Specialist advice from a UK COP9 investigation adviser
  • Support with Contractual Disclosure Facility responses and HMRC fraud enquiries
  • Clear review of deliberate conduct, penalties and disclosure strategy
  • Online, phone and in-person appointments across the UK
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Speak to a Tax Advisor

Book a Consultation for COP9 Investigation Help

COP9 enquiries often need immediate specialist review

When Code of Practice 9 Investigation Help Is Needed

is not an ordinary enquiry letter. It means HMRC is treating the case through its civil fraud framework and is offering the Contractual Disclosure Facility as the formal route for a complete and accurate disclosure of deliberate behaviour. HMRC’s public disclosure guide states that deliberate behaviour means you knew tax was owed but chose not to tell HMRC, or you knew figures on a return were wrong when submitted.

COP9 needs careful handling because the decisions made at the beginning can affect the entire case. HMRC’s public materials distinguish CDF from other disclosure routes precisely because it is linked to deliberate conduct. Recent HMRC performance publications also continue to report value recovered through Code of Practice 9 civil investigations, which shows COP9 remains an active and high-value enforcement route within HMRC’s Fraud Investigation Service.

  • HMRC COP9 Enquiry
  • Contractual Disclosure Facility
  • Fraud Civil Investigation
  • Deliberate Tax Behaviour
  • COP9 Disclosure Strategy

Common issues we deal with

Practical Help with Code of Practice 9 Problems

We deal with COP9 matters where judgement, technical accuracy and control of the process matter. The aim is to understand the full scope of the risk, protect your position and reduce unnecessary escalation.

01

HMRC COP9 Letter Review

We review the opening COP9 correspondence so you understand what HMRC is alleging, what the CDF means and what immediate decisions must be made.

02

Contractual Disclosure Facility Advice

We help you assess whether CDF is the correct route on the facts and what a complete and accurate disclosure would need to cover if accepted.

03

Deliberate Behaviour Analysis

We review whether the facts support HMRC’s deliberate-behaviour framework and how that affects the disclosure, penalty position and overall strategy.

04

Individuals and Responsible Persons Under COP9

We advise individuals who have received COP9 letter, including directors and other responsible persons where HMRC say the suspected tax fraud involved a company or another entity.

05

Historic Tax Irregularities and Multi-Year Reviews

We help where the issue spans several years and may involve multiple taxes, incomplete records or historic irregularities that must be reconstructed properly.

06

Penalty Exposure and Settlement Strategy

We review the likely penalty position, the quality of disclosure required and how best to approach settlement discussions in a controlled way.

07

COP9 and Criminal Risk Boundary

We help clients understand the seriousness of Code of Practice 9 and the importance of handling the civil fraud process properly.

08

Response, Disclosure and Resolution Planning

We help decide whether the best route is full CDF engagement, a carefully structured response, document reconstruction, technical challenge on scope, or wider settlement planning.

Clear specialist support makes a difference

Why Work with a COP9 Accountant

A COP9 Accountant does more than answer HMRC’s first letter. Good advice helps you understand whether HMRC is alleging deliberate conduct, what a complete disclosure would involve, how the case may affect penalties and settlement, and how to manage the process before it becomes more expensive or more difficult to resolve. HMRC’s own disclosure guide makes clear that CDF is for cases involving deliberate behaviour, which is why the quality and completeness of the response matter so much.

For some clients, that means deciding whether to accept the CDF route and begin a full disclosure. For others, it means reviewing records urgently, understanding how many years and taxes are involved, and building a defensible chronology before engaging further. HMRC’s continued reporting of amounts recovered through COP9 civil investigations confirms that this remains a serious and active enforcement channel, not a procedural side issue.

Reduce Risk

Spot factual gaps, weak records and disclosure risks before they become bigger HMRC problems.

Get Clear Guidance

Understand what HMRC is alleging, what CDF means and what practical steps should be taken next.

Deal with HMRC Properly

Approach COP9 letters, CDF decisions and settlement discussions with better structure and confidence..

Targeted support for serious civil fraud tax cases

Who We Advise On Code of Practice 9 Matters

COP9 advice is often needed when a case no longer fits a standard tax enquiry or ordinary disclosure route. As tax affairs become more complex, records become harder to explain and HMRC moves the matter into its civil fraud framework, many clients need specialist support rather than routine accountancy.

Individuals Facing COP9 Letters

For taxpayers who have received a Code of Practice 9 letter and need urgent help understanding the allegations, records required and disclosure decision.

Directors and Authorised Individual

For directors, shareholders or other responsible individuals where HMRC says a company-related tax fraud should be addressed through COP9.

Multi-Year Tax Irregularities

For people whose case spans several years, several taxes or incomplete records and cannot be handled as a simple correction.

Considering CDF Disclosure

For individuals who need specialist help deciding whether to accept the CDF and how to approach a full disclosure.

Flexible support across the UK

Speak Online, by Phone or In Person

We support clients across the UK by phone, video call and secure online document exchange. Many Code of Practice 9 matters can be handled efficiently without unnecessary travel, making it easier to get reliable advice whether you need help with a first HMRC letter, a CDF decision, a deliberate-behaviour review or a wider settlement strategy.

Get Tax Help Online

Speak to a specialist adviser by Zoom and deal with your COP9 investigation through secure document exchange.

Book an Appointment
Meet by Appointment

Where a face-to-face discussion is more suitable, in-person appointments can be arranged for a more detailed review.

Call us for a Meeting
Getting Started

Call, book online or send an enquiry and we will guide you to next step based on the taxes involved and the disclosure risks.

Send us your inquiry

What clients say about our specialist tax service

What Clients Say About Our Code of Practice 9 Support

We support clients who want COP9 investigation help to be clearer, more practical and easier to manage. Clients value responsive support, careful explanations and a more structured way of dealing with HMRC, CDF decisions and serious civil fraud tax risks.

Book a Consultation for COP 9 Investigation Help

I received a COP9 letter from HMRC and had no idea how serious it was or what the Contractual Disclosure Facility really meant. Tax Accountant reviewed the position carefully, explained the risks clearly and helped me approach the matter in a much more controlled way.

Deepak K

Tax payer

Our case involved several tax years, incomplete records and allegations that went far beyond an ordinary enquiry. The advice was clear, practical and far more useful than trying to deal with the COP9 process on our own.

Micheal W

Director

Your Questions - Our Answers

We are here to help you with any questions you may have

What happens if you reject the Contractual Disclosure Facility under a COP9 tax investigation?

If you turn down the Contractual Disclosure Facility (CDF) during a COP9 tax investigation, you lose the chance to settle things through a clear civil process for deliberate tax fraud. HMRC uses Code of Practice 9 when it thinks there are serious tax problems and offers protection from criminal charges if you fully and honestly admit to any deliberate actions. If you say no to the CDF, HMRC’s Fraud Investigation Service can keep looking into your case and might start a criminal investigation, depending on what evidence they find.
Saying no to the CDF does not mean you will be prosecuted immediately. However, you lose the protection that comes from making a full and voluntary admission. HMRC can use its own records, information from other sources, offshore reports, or your past tax returns to build a case. This means you no longer have a say in how your story is presented.
Before you decide to reject a COP9 offer, it’s important to look at how strong HMRC’s evidence is, which taxes are involved, and what risks come with how your actions are viewed. Our Specialist COP9 tax advisers can help you figure out if accepting the CDF is the right choice for you.
Under Code of Practice 9, taxpayers have 60 days to accept the Contractual Disclosure Facility and send in an Outline Disclosure. This Outline Disclosure should list all known deliberate tax issues and confirm that a full report will come later. You do not need exact tax figures yet, but you should clearly explain what happened, which taxes are involved, the years affected, and if offshore income, company structures, or trusts are part of the case.
HMRC expects the Outline Disclosure to be clear and honest. If the disclosure is vague or leaves things out, it can hurt your credibility and may lead to losing CDF protection. At this stage, you are setting out the scope, not final numbers, but you must show that you are making a full and genuine admission of deliberate tax fraud.
If your records are incomplete or complicated, the Outline Disclosure should explain what needs to be reconstructed and give a realistic timeline for the Full Disclosure Report. Leaving out facts, making incomplete admissions, or not mentioning offshore matters can greatly increase your risk in a COP9 tax investigation.
During a Code of Practice 9 investigation, HMRC looks at whether mistakes or omissions on tax returns were made on purpose or by accident. Deliberate actions usually mean someone chose to understate income, overstate expenses, hide offshore income, or misrepresent financial transactions. To prove intent, HMRC may check adviser emails, internal messages, banking activity, digital accounting records, and how transactions are set up.
How HMRC classifies behaviour—careless, deliberate, or deliberate and concealed—affects both the penalty amount and how far back they can review your taxes. In cases of deliberate tax fraud, HMRC can look back much further than the usual four years. If there is proof that a taxpayer knew about the issue, ignored warnings, or set up arrangements to hide it, HMRC may decide the behaviour was deliberate.
Relying on professional advice can sometimes help reduce the severity of HMRC’s classification, but only if the taxpayer gave the adviser all the correct information. If important details were left out, HMRC may still decide the behaviour was deliberate.
Since how behaviour is classified affects both penalties and the risk of further action, it is important to carry out a technical review early in a COP9 tax investigation. This helps ensure you can present a strong and consistent explanation.
Yes, HMRC can withdraw the Contractual Disclosure Facility under Code of Practice 9 if they decide the taxpayer has not given a full, accurate, and complete account of deliberate tax irregularities. This usually happens if important details are left out, assets are hidden, offshore accounts are not reported, or there are differences between financial records and what has been disclosed.
If the CDF is withdrawn, the protection from criminal prosecution that comes with voluntary disclosure may no longer apply. HMRC’s Fraud Investigation Service might then decide whether to continue with a civil resolution or to take a different investigative approach. This can greatly increase your risk.
That’s why the Full Disclosure Report should cover all income sources, companies, trusts, partnerships, and offshore structures in detail. Being open, keeping accurate records, and giving clear explanations are all crucial.
A COP9 tax investigation is more than just an accounting review. It is a formal civil fraud process with legal consequences. Having a professional involved helps make sure your admissions are correct, your calculations are solid, and nothing important is left out that could put your immunity at risk.
A Full Disclosure Report under Code of Practice 9 gives a complete overview of any deliberate tax irregularities. It usually explains how the issue happened, lists undeclared income or gains, recalculates tax owed for each year, includes interest calculations, and reviews any penalties.
If offshore income, company structures, or special arrangements are involved, the report should clearly show how money moved and name all related entities and accounts. Asset and liability statements help show everything is included. Supporting documents like bank statements, contracts, payroll records, trust deeds, and adviser letters are also needed.
The report ends with signed certificates stating that the disclosure is complete and accurate as far as the taxpayer knows. HMRC looks for clear, well-organized, and well-supported information.
If the disclosure is not well prepared, the COP9 investigation may take longer, HMRC may ask for more information, or it may be harder to reduce penalties. Having experienced COP9 accountants prepare the report helps meet HMRC’s standards and makes it easier to reach a settlement.
In a COP9 tax investigation, the penalties depend on how HMRC views your actions and how much you cooperate during the Contractual Disclosure Facility process. If you admit to deliberate tax fraud, the penalties are much higher than for careless errors. HMRC also makes a distinction between “deliberate” actions and “deliberate and concealed” conduct. If you have tried to hide the fraud, the penalties will be even higher.
Three main things affect whether your penalty can be reduced: how quickly you disclose the issue, how much you cooperate, and the quality of the information you provide. If you admit everything early and fully under the CDF, your penalty can be reduced significantly. But if you delay, leave out details, or give inconsistent answers, you may not get much reduction.
In cases of offshore deliberate tax fraud, higher penalty rates may apply. HMRC will also add statutory interest to any unpaid tax. When there are time limits, it is important to have a clear penalty negotiation strategy. Experienced COP9 accountants can help make sure your cooperation is well documented and that your arguments for reducing penalties are strong.
In a COP9 tax investigation, the penalties depend on how HMRC views your actions and how much you cooperate during the Contractual Disclosure Facility process. If you admit to deliberate tax fraud, the penalties are much higher than for careless errors. HMRC also makes a distinction between “deliberate” actions and “deliberate and concealed” conduct. If you have tried to hide the fraud, the penalties will be even higher.
Three main things affect whether your penalty can be reduced: how quickly you disclose the issue, how much you cooperate, and the quality of the information you provide. If you admit everything early and fully under the CDF, your penalty can be reduced significantly. But if you delay, leave out details, or give inconsistent answers, you may not get much reduction.
In cases of offshore deliberate tax fraud, higher penalty rates may apply. HMRC will also add statutory interest to any unpaid tax. When there are time limits, it is important to have a clear penalty negotiation strategy. Experienced COP9 accountants can help make sure your cooperation is well documented and that your arguments for reducing penalties are strong.
The 60-day deadline to accept the Contractual Disclosure Facility under Code of Practice 9 is strict. If you do not respond within this time and do not have an agreed extension, HMRC may see your offer as rejected. As HMRC explains in their guidance: “If you do not reply within 60 days HMRC will assume that you have chosen not to accept the offer of contract.” This means you lose access to the civil fraud resolution process and the protection from criminal prosecution for what you disclose. The guidance also says: “If you choose not to accept the offer of contract, you lose your opportunity to secure immunity from prosecution for the deliberate conduct you disclose.”
HMRC may give you more time if you have a real and proven reason. Some valid reasons for an extension include:
  • Serious illness affecting you or a close family member
  • Major difficulty in recovering old or missing financial records
  • Recent bereavement of an immediate family member
  • Unexpected hospitalisation
  • Other exceptional personal circumstances beyond your control
Extensions are not always given, so ask as soon as you can and clearly explain why you need more time.
If you miss the 60-day COP9 deadline and do not engage with HMRC, they may escalate the case. This could mean stronger information-gathering actions or other investigation methods by HMRC’s Fraud Investigation Service. For example, HMRC could carry out an unannounced visit to your business or contact your bank directly to obtain records. These actions make it even more important to respond in time.
It is important to get professional help as soon as you receive a COP9 letter to protect your position. In the first week, your adviser will look at the letter and your case, explain what is at risk, and help you avoid key mistakes in your response. During the first month, your adviser will collect the needed documents, help you draft the Outline Disclosure, and make sure you meet all deadlines. This clear plan helps you get the best result and gives you peace of mind throughout the process.
Yes, a COP9 tax investigation can include offshore income, overseas bank accounts, trusts, and complex company structures if HMRC thinks you have not disclosed everything. HMRC can get information about offshore matters through international agreements like the Common Reporting Standard and can ask for disclosures under Schedule 36 of the Finance Act 2008. These rules help HMRC find undeclared offshore income through automatic reporting and sharing data with other countries.
When using the Contractual Disclosure Facility, you need to include all deliberate issues, like foreign rental income, overseas dividends, offshore trusts, or hidden foreign accounts, in your disclosure. If you leave out any offshore matters, you could lose the protection the CDF offers.
If HMRC finds deliberate offshore tax fraud, you can face higher penalties and longer investigations. For example, Mr S hid £200,000 in an overseas account and received a 200% tax penalty, along with years of checks. HMRC will ask for a full explanation of your overseas finances, currency exchanges, and who actually owns the assets.
International tax reporting is complicated, and the penalties can be serious. It’s a good idea to work with COP9 accountants who know about offshore disclosure and civil fraud cases. They can help you stay compliant and protected under Code of Practice 9. To get ahead of any issues, book a confidential meeting with a COP9 specialist soon. Getting expert advice early can really improve your outcome.

Yes. In a Code of Practice 9 investigation, HMRC can look at more tax years than those listed at first if they find signs of deliberate behaviour in other periods. For deliberate tax fraud, HMRC has the power to go back much further than usual—up to 20 years (per Taxes Management Act 1970, section 36(1A)). Simply put, if HMRC suspects fraud, they can review up to 20 years of your past tax returns.

Where patterns of under-declaration, structured concealment, or repeated offshore omissions are identified, HMRC may require disclosure covering all relevant years affected by deliberate conduct. For example, if a taxpayer failed to declare overseas investment income from 2010 to 2015 by systematically omitting interest from offshore accounts, HMRC may expand its scope to cover those years. To put this in practical terms, if £5,000 of offshore interest went undeclared each year over six years, the unpaid tax and related penalties could quickly add up to around £12,000 or more. This shows how potential costs can escalate over multiple years. The Full Disclosure Report must therefore take a comprehensive approach rather than limiting review strictly to the years listed initially.

Giving a full disclosure for all relevant years helps you avoid unexpected penalties and gives you more control over the process. Rather than worrying about what HMRC might find later, you can have peace of mind and make sure you are protected under the CDF, which helps the investigation end more smoothly. Looking back at your records in advance also lowers the risk of future disputes or surprise bills, so you can feel more certain as your case is resolved.
Managing the scope carefully is important in COP9 tax investigations to make sure your disclosure is complete but also reasonable. As a first step, prepare an initial scoping memo within 30 days of getting the COP9 opening letter. To help make this process easier, use the checklist below as a guide for your memo: Identify all potentially relevant tax periods that could be within HMRC’s scope, Gather sources of evidence and documentation relating to the identified periods, Flag any high-risk items or patterns that require more detailed review.
Using this checklist will help you identify the right periods, focus on important areas, and set up a compliant response from the start.
Specialist representation in a COP9 tax investigation significantly influences both procedural control and financial outcome. Code of Practice 9 cases involve deliberate tax fraud allegations, strict contractual obligations under the CDF, behavioural classification, and high financial exposure.
Experienced COP9 accountants handle all communication with HMRC’s Fraud Investigation Service, keep track of deadlines, and make sure the Outline Disclosure is set out correctly. They also prepare the Full Disclosure Report with accurate figures and supporting documents. For example, in a recent case, a client who sent in a well-prepared Outline Disclosure early had their penalties reduced from 55 percent to 30 percent because everything was presented clearly and negotiations were timely. COP9 specialists also work to lower penalty percentages, explain any factors that could reduce penalties, and make sure the story of what happened is clear and legally sound.
Having a professional oversee the process lowers the chance of making mistakes, missing information, or saying things that could risk your protection from prosecution. This helps keep you safe from criminal charges. It also makes settlement talks go more smoothly by providing clear numbers and explanations, which can lead to a better and faster outcome.
In cases of deliberate tax fraud under Code of Practice 9, taking the right steps from the start can lower your risk, help keep the case civil instead of criminal, and speed up a fair settlement.