If you have reached our tax investigation advice page then it probably means one of three things:

If you have not received an HMRC letter, but are concerned that you may have unpaid taxes, then please visit our page on making an HMRC voluntary disclosure


Contact will usually come from an HMRC local compliance team. The opening HMRC letter will be headed Check of Self Assessment Tax Return; alongside the relevant tax year of years. HMRC will usually write to you informing you that a check of self-assessment tax return has commenced when they feel tax is at risk. The letter will ask you to supply relevant information and/or records that HMRC consider to be reasonably required to check your position. You simply must seek specialist in tax investigation advice before complying with HMRC requests for information and documents.  You can read detailed information on supplying records during an HMRC compliance check by visiting our news blog dealing with HMRC compliance check – requests for information and documents.


You may have received notice that HMRC suspects serious fraud and that you are now the subject of an investigation under the code of practice 9 procedures. Cases conducted under this provision require very specialist tax investigation advice

For detailed tax investigation advice on the code of practice 9 and HMRC’s approach when dealing with civil investigation of fraud,  please select the relevant tax service from the list below.

If you receive notice from HMRC that a compliance intervention of any kind has commenced, you need to obtain honest, straight forward tax investigation advice quickly.


We obviously try to be as comprehensive as we can throughout all of the tax investigation advice we give on our website.

However, you simply cannot beat speaking with a sympathetic human being, who will listen and immediately understand your tax investigation concerns. A telephone consultation is free. There is no commitment or sales pressure. Take as much time as you need. Arm yourself with as much tax investigation advice as you possibly can before making a decision.

Our Tax Investigation Services

A tax investigation or compliance check conducted by Her Majesty’s Revenue and Customs & Excise (HMRC) can turn into a stressful and largely unpleasant experience if you do not obtain the correct tax investigation advice. Quite simply, specialist, proactive intervention is always required and the earlier the better. If you are seeking UK tax investigation services or need tax investigation advice, Admiral Tax is ready to help.


Tax investigation advice from Admiral Tax comes with several key benefits. Firstly your case will never to handled by anybody other than a former senior HMRC investigator. Dominic Kiernan is the owner of Admiral Tax Investigations. He has almost 30 years of experience of dealing with tax investigation services on both sides of the compliance divide. You can read more about Dominic and his career within HMRC visiting his LinkedIn profile.

Who better to represent you than an adviser who understands fully the mindset and tactical approach of HMRC.

Who better to deal with technical and demanding tax investigation services than a man who has worked at the sharp end of tax compliance for nearly 30 years

This experience brings:

  • Swift and effective settlement, resulting in lower professional fees
  • Sound knowledge of HMRC’s internal systems
  • A clear understanding of how the legislation is applied
  • How legislation can be interpreted and utilised effectively
  • An insight into the tactical approach
  • Effective communication based upon previous experience
  • Negotiation skills ensuring the best financial settlement possible.

We offer a full range of tax investigation services, including:


If you are seeking tax investigation services; then you have either received a letter from HMRC telling you that a tax investigation has begun. Remember the description within the HMRC letter will never state that you are under investigation. Compliance contact from HMRC comes in many guises.

Your letter may be headed; check of the self-assessment tax return in which case you will be seeking help with local compliance tax investigation services. It may be from an HMRC task force who have concerns that you are operating in the hidden economy. If you receive a letter from the HMRC Fraud Investigation Service; it is most likely that HMRC will be investigating you on suspicion of serious tax fraud. In those circumstances, you will need to instruct a firm who offer Code of Practice 9 tax investigation services.

Always check that your adviser has specific and sufficiently senior HMRC tax investigation experience. Many firms say that their team is made up of former HMRC investigators. You should always check their credentials when seeking tax investigation services. Ask to see CV’s. Ask to see professional profiles on LinkedIN. But most of all ask questions.Lots of questions. The wrong decision when seeking tax investigation services from a specialist can be extremely costly.

If you wish you discuss any of our range of tax investigation services then please do not hesitate to either call or email.