HMRC Code of Practice 8
You've received a COP8 letter. Here's what to do in the next 48 hours.
Stay calm. COP8 is a civil investigation. But don't call or write to HMRC until you've taken specialist advice.
Call nowLed by Nick Davies — ex-HMRC, 40+ years in tax disputes
- Strictly confidential
- Specialists in HMRC FIS investigations
- We'll call you within 2 hoursOutside office hours? We'll call you by 11am the next working day.
In the next 48 hours
Do this. Not that.
Small choices in the first two days are the ones most likely to be regretted later.
Do
- Note the deadline in the letter and tell us immediately.
- Keep every record, including computer records. HMRC's Code asks you to.
- Keep filing your returns and paying on time. HMRC treats ongoing compliance as a sign of willingness to engage.
- Gather the letter, recent returns and details of any schemes or structures used.
Don't
- Call HMRC to “just explain” before you have advice.
- Guess at answers. HMRC's Code warns that knowingly false statements can lead to criminal investigation.
- Move, sell or transfer assets without advice.
- Rely on the adviser who set up the arrangement HMRC is questioning. They may have a conflict of interest.
Before you reply
What HMRC already knows
HMRC can gather information before it writes, including from third parties. It also monitors open-source material such as Companies House, the Land Registry, news sites and public social media.
- Third parties, such as banks and overseas tax authorities
- Companies House
- The Land Registry
- News sites
- Public social media
Assume HMRC knows more than the letter says.
The letter describes how HMRC wants to proceed, not everything it holds. That is one reason a first reply should be drafted by someone who has handled these investigations before.
Check your risk in 2 minutesYour first week
What we do in your first week
Five steps, in order, from the first conversation to a reply that is on time.
Free, confidential call to understand your situation
Tell us what the letter says. We will explain, in plain English, what HMRC appears to be looking at.
Review the letter and your records
We check the issues HMRC has named, the years in scope and the deadline it has set.
Become your authorised agent and take over HMRC contact
From that point, HMRC's calls and letters come to us rather than to you.
Set the strategy, including how best to engage with HMRC
We agree with you how and when your full position is presented to HMRC, and explain what each option means for you.
Respond to HMRC within its deadline
Your reply is made in the form that best protects your position.
Who handles your case
COP8 casework only

Nick Davies
Head of Tax Disputes, AMS Group
Began his career at HMRC
Over 40 years advising and representing clients in tax disputes
Founding member of the Contentious Tax Group; represents clients at the Tax Tribunal
ICAEW Chartered Accountants
Just received the letter
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Confidential consultation
Don't reply to HMRC until you've spoken to a specialist
Tell us what the letter says and we will talk you through your options, in confidence and without obligation.
Free first call. Fixed-fee case review from £1,950 + VAT, credited against your first stage.
Not ready to talk? Take the 2-minute COP8 risk check
- ICAEW Chartered Accountants
- Strictly confidential
- Specialist in HMRC investigations
- We'll call you within 2 hoursOutside office hours? We'll call you by 11am the next working day.