COP8 specialist investigations
Where HMRC considers a case significant enough for its specialist investigators, but is not alleging fraud. Materially more serious than a routine compliance check.
Tell us what has arrived
We reply by email. No attachments, nothing sensitive yet.
What COP8 signals
Code of Practice 8 is the code HMRC’s Fraud Investigation Service follows for a civil investigation where it is not using Code of Practice 9. A COP8 investigation means HMRC has allocated specialist resource to your affairs. HMRC says it investigates wherever it believes there may be a significant loss of tax; in practice that commonly means a technically complex case, substantial amounts, or arrangements HMRC regards as tax avoidance. It does not carry an allegation of fraud — that is what COP9 is for.
The distinction matters, but so does what it has in common with COP9: these are investigators who do this work full time, and the case has been selected deliberately.
What a COP8 letter usually contains
A COP8 enquiry begins in writing. HMRC’s published guidance indicates that the opening letter will usually:
- say that the Fraud Investigation Service is investigating under COP8, and provide a copy of the code
- give HMRC’s reasons, although it says it does not have to
- identify the issues it intends to focus on, which may later widen
- invite you to an opening meeting
- where relevant, include a Section 9A notice of enquiry into a Self Assessment return
If the check began elsewhere in HMRC, you or your adviser will be told that it now continues under COP8.
How a COP8 investigation usually runs
- The opening meeting. Attending is voluntary, though the code treats meetings as part of co-operating. HMRC keeps a written record, and you can ask for a copy.
- Information and documents. HMRC asks for what it needs. Where information is not provided voluntarily, it can use its statutory information powers, including to approach third parties.
- Disclosure. Usually made at a meeting or in a follow-up letter from your advisers. HMRC does not usually ask for a formal disclosure report under COP8.
- Settlement. If nothing is wrong, HMRC says so. Otherwise it seeks an agreed settlement of the tax, interest and penalties. Without agreement it can make formal assessments, which carry rights of review and appeal.
COP8 and COP9
Both codes are operated by the Fraud Investigation Service, and both are civil. COP9 is used where HMRC suspects fraud and comes with an offer of the Contractual Disclosure Facility; COP8 does not. Our COP9 page explains how to tell the two letters apart.
The line that can move
A COP8 investigation is not fixed in place. A COP8 enquiry can move to COP9 if HMRC comes to a different view of the conduct: the code says that if HMRC suspects or finds evidence of fraud, it may take a different approach, including a criminal investigation. It also warns that a statement or certificate you know to be false can lead to a criminal investigation. How the early exchanges are handled is therefore not only about the current investigation.
If a COP8 letter has landed
- Read what it actually does: the taxes, years and issues it names, any dates it sets, and whether it includes a notice of enquiry.
- Take advice before answering on the substance. The code says the decision whether to co-operate is yours.
- Keep every record, including computer records, and keep filing returns on time.
What we do
- Establish the scope of what is actually being investigated
- Take over correspondence and attend meetings with HMRC
- Work out the technical position properly before adopting one with HMRC
- Draft every response, and identify requests that fall outside the investigation
- Advise on disclosure where the facts warrant it, rather than by default
- Refer the matter on where it needs counsel or a larger investigations team
If your letter refers to Code of Practice 9 rather than Code of Practice 8, the position is different and the deadlines are strict. See COP9 and the Contractual Disclosure Facility.
Common questions
What is Code of Practice 8?
COP8 is the code HMRC's Fraud Investigation Service follows for civil investigations where it is not using Code of Practice 9 and believes there may be a significant loss of tax. It commonly covers arrangements HMRC considers to be tax avoidance, substantial amounts and complicated technical issues.
How is COP8 different from COP9?
COP9 is used where HMRC suspects fraud, and offers the Contractual Disclosure Facility. A COP8 investigation is not a fraud investigation: HMRC says it is not undertaken with a view to criminal prosecution, and the facility is not offered under it. However, if HMRC comes to suspect, or finds evidence of, fraud during a COP8 investigation, it can change its approach.
Is COP8 more serious than a normal compliance check?
Yes. COP8 is handled by specialist investigators rather than the officers who deal with routine compliance checks, and the cases selected for it are ones HMRC considers to warrant that resource.
Do I have to attend a COP8 meeting?
No. HMRC's guidance to its own investigators says it cannot compel anyone to attend a COP8 meeting. The code does treat meetings as an important part of co-operating, so whether to attend, and how to prepare, is a decision to make with advice.
What is a payment on account in a COP8 case?
HMRC will ask for a payment towards any additional liability it thinks is due while the investigation continues. The code says paying can help stop late payment interest building up; HMRC's internal guidance says the payment should not exceed a reasonable estimate of the additional tax due.
Should I handle a COP8 investigation with my usual accountant?
That depends on their experience of investigations specifically. Preparing accurate accounts and defending a specialist investigation are different disciplines, and a practice that does not routinely handle the latter may be better placed to refer it on.
Start with the letter
Send a photo of page one on WhatsApp. We will tell you what it is, what the deadline means, and what a fixed fee would look like — within one working hour during office hours — Monday to Friday, 9am to 5pm.
We only need the letter. Please do not send bank statements, identity documents or your UTR at this stage.