Tax Investigations

Our tax investigations team can help businesses and individuals subject to an investigation by HMRC. We can also advise taxpayers on issues not known to HMRC, to make a voluntary disclosure and bring their tax affairs up-to-date.

What we do 

We can assist in the following matters:

  • HMRC enquiries
  • Code of Practice 9 investigations (the Contractual Disclosure Facility (CDF), where HMRC suspects tax fraud)
  • Code of Practice 8 investigations (avoidance)
  • Liechtenstein Disclosure Facility, and crown dependency disclosure facilities
  • Other disclosure facilities
  • Residence and domicile investigations
  • Missing Trader Intra-Community (MTIC) fraud investigations (carousel fraud)
  • Other HMRC disputes and investigations
  • Alternative Dispute Resolution
  • Criminal investigations and prosecutions

HMRC are becoming more sophisticated in the use of data to assist their risk-profiling of taxpayers. That means there is a greater chance that HMRC will identify those taxpayers who have not paid the correct amount of tax. The level of penalties for making a mistake with your tax affairs can be severe. That makes an early assessment of your position essential.

Our tax investigations specialists have experience helping a wide range of clients, across all business sectors, including:

  • Individuals (including company directors)
  • SMEs
  • Corporates
  • Offshore Trust Companies
  • Professional advisers requiring specialist advice for their clients.

Speak to a Legal Partner

Our team support you to navigate complexity, seize opportunity and move forward with legal clarity.

Fergal Dowling
Fergal Dowling
Managing Partner - Business Services Group

Contact our Specialists

Get strategic advice from a team that knows how to protect and grow your business. Please complete our enquiry form and one of our experts will contact you by the next working day.


Alternatively, you can call us now.


Our opening hours are Monday to Friday 8am to 6pm (Excluding Public Holidays).

0370 1500 100

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Making an enquiry

We have several ways you can contact us, either by completing our online contact form, by phone, or using our live chat. If you start your journey online, here are the first steps to working together.
  • contact us
    Complete our online form
    We need a few details to understand your situation and the kind of support you need.
  • Few questions
    We’ll contact you by phone
    On the call our experts will ask you a few more questions to make sure we connect you with the right legal advice from our team.
  • Appointment
    We arrange a full appointment
    Your next step is an in-depth appointment with a specialist solicitor to discuss how we could advise you.

Why choose Irwin Mitchell?

If you have a tax problem – whether HMRC know about it or not – we can help. If you are a professional adviser, we can work with you to regularise your client’s tax affairs.

Our multi-disciplinary team comprises lawyers, accountants and investigation specialists. We can provide a complete case-handling service, or provide advice on particular aspects of an investigation. We can work with your existing adviser, to achieve a satisfactory outcome to your situation. With ex-HMRC experience, we can provide a unique insight into the options available, as well as determining what action HMRC is likely to take.

Please contact us for a free and confidential initial consultation to discuss your situation.

Testimonials

"Always deliver 100% effort in responding in a timely fashion and in a very professional manner. They clearly come across as wanting to make a difference for their clients." - Legal 500, 2022.

Described as having "Excellent collaboration and co-operation between departments. A one-stop shop for all aspects of legal advice." - Legal 500, 2022.

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Recognised for excellence. Chosen for care.

  • Legal 500 Top Tier Firm UK 2026
  • Sunday Times Best Places to Work 2025
  • ePrivateClient Top Law Firms 2025
  • Chambers High Net Worth 2025