HMRC Tax Investigation Accountant UK

Once HMRC opens an enquiry, the position changes. Deadlines apply. Penalties depend on how the case is handled. Early responses shape how far the enquiry goes. We review the notice, assess risk, and take control of HMRC contact from the outset.

Legend Fusions is the UK advisory brand evolved from Legend Financial & Tax Advisers, unifying tax, compliance, and advisory services under one international group.

Handling HMRC enquiries and investigations for clients across London, Bolton, Milton Keynes and the UK. 

Where We Step In

We take control once HMRC opens an enquiry or compliance check.

  • Manage full and aspect enquiries
  • Structure responses in COP8 and COP9 cases
  • Address discovery assessments
  • Prepare voluntary disclosures
  • Negotiate penalty classification

This is not general accounting. It is formal representation during an active investigation.

years experience
+
13+ years handling HMRC enquiries and investigations

Types of HMRC Investigations

HMRC opens enquiries based on risk signals, data inconsistencies, or behavioural concerns. The scope determines exposure.

  • Full enquiries covering the entire return
  • Aspect enquiries focused on specific entries
  • Compliance checks and visits
  • Code of Practice 8 (COP8) cases
  • Code of Practice 9 (COP9) fraud investigations
  • Discovery assessments reopening prior years
  • PAYE and VAT interventions

Once opened, the enquiry can widen. Early positioning matters.

What We Control During an Investigation

  • Review HMRC notices and statutory deadlines
  • Structure responses and technical position
  • Manage HMRC correspondence
  • Determine disclosure approach
  • Negotiate penalty position
  • Conclude the enquiry on agreed terms

HMRC may revisit positions during the process. We remain engaged through to closure. 

Our Investigation Process

HMRC enquiries move in stages. Early decisions affect exposure.

Review and Position

We assess the notice and confirm the initial position.

Representation

We assume representation and manage HMRC contact.

Case Management and Resolution

We address technical and behavioural issues and conclude the enquiry.

Timing influences outcome. We manage the sequence.

Trusted by our clients

Legend Fusions guided me through the MTD changes with clarity. They explained what quarterly reporting meant for my rental income and set up everything properly. I now feel confident that my records and submissions are fully compliant.

James Turner

The transition to digital reporting felt overwhelming at first. The team handled the software setup and managed each quarterly update on time. Clear advice, prompt responses, and no confusion.

Aisha Rahman

Professional, organised, and proactive. They reviewed my income thresholds early and prepared me before the MTD deadline. The process was structured and stress-free.

Daniel Hughes

Related tax services

HMRC investigations often reveal wider tax issues that need coordinated support.

Inheritance Tax Planning

Protecting estates and long-term wealth exposure

Capital Gains Tax

Advice on asset sales and reporting

Cross-Border Taxation

Support with overseas income issues

Tax for Company Directors

Integrated personal and director tax review

Personal Tax Planning

Long-term strategy to minimise liabilities

Each service can influence how your investigation is resolved and your future tax position.

Common HMRC investigation situations we handle

Compliance checks and enquiries

Serious investigation cases

Voluntary disclosures and corrections

Penalty and behaviour disputes

Areas we serve

We provide UK-wide inheritance tax planning remotely, with in-person consultations available in London.

Related HMRC investigation guides

Understanding common enquiry and compliance risks

Understanding common enquiry and compliance risks

How COP8 and COP9 investigations work

How COP8 and COP9 investigations work

First steps to protect your position

First steps to protect your position

Frequently asked questions

Why would HMRC open an investigation into me?
HMRC investigations are usually triggered by risk signals such as inconsistent returns, missing income, or data mismatches. Some checks are random, but most arise from perceived compliance risks.
An HMRC enquiry is a formal review of a tax return. It can focus on one issue or expand into a full investigation depending on findings.
A compliance check is HMRC verifying that records, returns, and payments are accurate. It may involve document requests or visits.
COP8 investigations involve complex tax avoidance or technical disputes. They are serious but not criminal cases.
COP9 is used when HMRC suspects deliberate tax fraud. It allows voluntary disclosure to avoid criminal prosecution.
A discovery assessment allows HMRC to reopen past tax years if they believe income was underreported.
Deliberate behaviour can lead to higher penalties. Specialist defence is critical to reduce financial exposure.
Reasonable care means taking proper steps to keep accurate records and file correctly. It affects penalty outcomes.
Responding without advice can escalate the situation. Early specialist representation protects your position.
Yes. Penalties can often be mitigated through negotiation, cooperation, and proper evidence.
HMRC typically asks for records, bank statements, invoices, and supporting evidence linked to the return.
Yes. HMRC has statutory time limits depending on behaviour, error type, and disclosure.

Get specialist help with your HMRC investigation

Share your situation and our investigation team will guide you immediately.