Opening a letter from HMRC to find they want to investigate your tax return is one of the most unsettling things that can happen to a taxpayer. The immediate instinct for most people is to panic. The sensible instinct is to pick up the phone and speak to a qualified tax specialist before doing anything else.
This guide explains what HMRC enquiries involve, what your rights are, and what happens at each stage.
Quick Answer
Do not ignore the letter and do not respond without taking professional advice first. HMRC enquiries range from routine questions about a specific item on your return to full investigations into your entire financial affairs. The outcome depends heavily on how you respond and whether you have experienced representation.
Types of HMRC Enquiry
Aspect Enquiry
The most common type. HMRC picks a specific item on your return that it wants to examine more closely. This might be a particular expense claim, a rental income figure, or an apparent discrepancy between your declared income and other data HMRC holds.
Aspect enquiries are often resolved relatively quickly if the figures are correct and you can provide clear supporting documentation.
Full Enquiry
HMRC examines your entire tax return in detail. Full enquiries are more serious and time-consuming, but they do not automatically mean HMRC thinks you have done something wrong. Returns are sometimes selected at random.
COP8 Enquiry
A Code of Practice 8 enquiry is used where HMRC suspects tax avoidance, typically involving offshore assets, trusts, or complex financial arrangements. These require specialist handling.
COP9 Investigation
Code of Practice 9 is the most serious category. It is used where HMRC suspects deliberate tax fraud. A COP9 investigation involves a formal offer to disclose under the Contractual Disclosure Facility (CDF). Getting specialist representation at this stage is not optional.
What Are Your Rights During an Enquiry?
HMRC has powers to request information and documents, but those powers are not unlimited. You have the right to:
- Understand exactly what HMRC is looking at and why
- Receive reasonable time to gather documents
- Have a professional representative deal with HMRC on your behalf
- Appeal decisions you disagree with to the First-tier Tribunal
- Make a formal complaint if HMRC acts unreasonably
HMRC cannot simply demand anything it likes. Requests must be specific, relevant, and proportionate. If HMRC oversteps, a good tax specialist will challenge the request.
What Should You Do When You Receive the Letter?
Step 1: Read it carefully. What type of enquiry is it? What specific information is HMRC requesting? What is the deadline for response?
Step 2: Do not respond immediately. There is almost always time to take advice before the deadline. Responding too quickly, without proper preparation, can create more problems than it solves.
Step 3: Contact a tax specialist. A specialist who handles HMRC enquiries regularly will know what HMRC is likely looking for, what you need to provide, and what you do not need to provide. They can take over all correspondence on your behalf.
Step 4: Gather your records. Start pulling together the documents that relate to the period under enquiry: bank statements, invoices, receipts, rental statements, and any other records relevant to the figures on your return.
How Long Do Enquiries Take?
This varies enormously. A straightforward aspect enquiry where the figures are clearly correct can be closed within a few weeks. A full enquiry involving multiple years and complex income may take 12 to 24 months. COP8 and COP9 cases can take several years.
Good representation generally shortens the process, because a qualified specialist can respond quickly, accurately, and in the precise way HMRC needs to move the case forward.
What Are the Possible Outcomes?
- Enquiry closed with no amendment: HMRC accepts your return as filed. No additional tax is due.
- Additional tax, interest and penalties: HMRC determines that more tax was owed. Interest is charged from the original due date, and penalties are added depending on the nature of the error.
- Appeal to First-tier Tribunal: If you disagree with HMRC’s conclusion, you can appeal. This is relatively uncommon for straightforward cases but an important safeguard.
Voluntary Disclosure
If you know there are errors in your past returns before HMRC contacts you, voluntary disclosure is always the better path. HMRC treats self-correction far more favourably than errors uncovered through investigation. Penalties are substantially lower for unprompted disclosure compared to prompted disclosure.
FAQs
Does receiving an enquiry letter mean HMRC thinks I have done something wrong? Not necessarily. Some returns are selected at random as part of HMRC’s compliance programme. Others are triggered by specific risk factors or data HMRC holds from third parties. Receiving an enquiry letter is not an accusation.
Can I handle the enquiry myself? You can, but it is rarely advisable. HMRC is experienced at these investigations. A qualified tax specialist knows how to respond correctly, what to disclose, what to challenge, and how to negotiate a fair outcome. Many people who try to handle enquiries themselves inadvertently make them worse.
What if I cannot afford a tax specialist? Some professional advisers offer payment plans. It is also worth considering that the cost of representation is often far less than the additional tax and penalties that result from poor handling of an enquiry.
My enquiry is for a year when I used a different accountant. Does that matter? No. A tax specialist can take over the case regardless of who prepared the original return. They will review the return, assess the issues, and represent you going forward.
I think HMRC is looking at the wrong thing. Can I say so? Yes. You are entitled to clarify what HMRC’s concerns actually are. If the enquiry is based on a misunderstanding or incorrect information HMRC has received from a third party, this can and should be addressed directly.
Facing an HMRC Enquiry? Get Experienced Representation
Our principal tax adviser is an ACCA and ATT qualified tax specialist and HMRC Registered Agent with over 25 years of personal tax experience, including handling aspect enquiries, full enquiries, COP8 cases and voluntary disclosures. Kent Tax Specialists represents clients across Gravesend, Dartford, Maidstone, Medway, Sevenoaks, Tonbridge and the wider Kent area. Contact us today for a confidential discussion.
Also see: HMRC Investigation Support in Gravesend | HMRC Investigation Support in Maidstone
