Receiving a letter or call from HMRC about your tax affairs can be worrying, especially if you are unsure why you have been contacted. The right HMRC Investigation Advice can help you understand the process, organise the relevant information and respond appropriately.

An HMRC investigation, often described by HMRC as a compliance check, does not automatically mean you have done anything wrong. HMRC carries out checks to confirm that taxpayers are paying the right amount of tax and receiving the correct allowances and reliefs.

The key is to remain calm, understand what HMRC is asking for and avoid making rushed assumptions.

What Is an HMRC Investigation?

An HMRC compliance check is a review of a person’s or business’s tax position. The scope can vary considerably. Some checks involve a straightforward question, while others may involve detailed examination of accounts, tax returns and financial records over several years.

HMRC may check:

• Self Assessment tax returns
• Company Tax Returns
• Accounts and tax calculations
• PAYE records
• VAT information
• Income and business expenses
• Supporting financial documents

HMRC should normally explain what it wants to check and why. If you use an authorised tax agent, HMRC may also communicate with them.

Why Might HMRC Start an Investigation?

HMRC has the right to check whether tax returns are complete and accurate. A compliance check may be prompted by information that appears inconsistent or requires further clarification.

Examples can include:

• Figures that appear incorrect
• A significant difference between turnover and tax declared
• An unusually large VAT repayment claim
• Information that does not match other records
• Claims requiring additional evidence
• Wider compliance activity

Being contacted does not automatically mean that HMRC believes you have deliberately done something wrong. In some cases, the check may simply be intended to establish the correct tax position.

HMRC Investigation Advice: Your First Steps

The way you respond at the beginning can affect how easily the matter is managed.

Read the HMRC Letter Carefully

Do not ignore correspondence. Read the letter closely and identify:

• What tax period is being reviewed
• What HMRC wants to check
• Which documents or information are requested
• The deadline for responding
• The contact details of the HMRC officer handling the case

If anything is unclear, do not guess. You can ask HMRC for clarification or obtain professional advice.

Gather Relevant Records

Collect documents that relate directly to the enquiry. Depending on the issue, these may include bank statements, invoices, receipts, payroll records, contracts and accounting records.

HMRC may request information or documents during a compliance check and can, in appropriate circumstances, use formal powers to obtain information.

Keep Copies of Everything

Maintain a clear record of:

• Letters received from HMRC
• Information submitted
• Documents provided
• Emails and written responses
• Notes from telephone conversations
• Important deadlines

Good organisation can make the investigation easier to follow, particularly if it continues for an extended period.

How Should Business Owners Handle an HMRC Investigation?

Business owners often face additional pressure because an investigation can involve accounting systems, employees, suppliers and several types of tax.

It is important not to allow the investigation to disrupt normal compliance. HMRC states that taxpayers should continue filing returns and paying taxes that are due while a compliance check is ongoing.

For more practical guidance, business owners can read How to Handle the HMRC Investigastion? Tips for Business Owners, which explains useful steps for managing the process.

A sensible approach includes:

• Reviewing the relevant tax return
• Checking supporting records
• Identifying missing documentation
• Avoiding rushed or unsupported answers
• Keeping communication factual and professional
• Meeting reasonable deadlines

If you cannot provide requested information by a deadline, contact HMRC rather than simply failing to respond.

Can an Accountant or Tax Adviser Represent You?

Yes. HMRC allows taxpayers to authorise a paid tax agent, such as an accountant or tax adviser, to deal with tax matters on their behalf.

During a compliance check, formal or temporary authorisation may be required depending on the circumstances. HMRC provides a process for authorising an agent to deal with a compliance check.

Professional representation may help with:

• Reviewing HMRC correspondence
• Understanding information requests
• Organising financial records
• Preparing written responses
• Communicating with HMRC
• Explaining technical tax matters
• Reviewing proposed tax adjustments

However, HMRC makes clear that taxpayers remain responsible for ensuring accurate information is provided. Your adviser should therefore have access to all relevant facts and records.

What Happens if You Ignore an HMRC Request?

Ignoring correspondence is rarely a sensible approach.

If HMRC formally requests information or documents and the request is not met, it may issue an information notice. Failure to comply with a valid notice can result in penalties.

That does not mean you should automatically provide information you believe is irrelevant or unreasonable. HMRC’s guidance states that you can raise concerns if you believe a request is not reasonable or relevant.

This is one situation where professional advice can be particularly valuable.

The Importance of Accurate Records

Strong record keeping is one of the best ways to prepare for tax scrutiny.

Your records should allow the figures reported to HMRC to be properly explained and supported. HMRC’s compliance guidance covers record-keeping requirements and the consequences that can arise when records are not properly retained.

Depending on your circumstances, relevant records may include:

• Sales and purchase invoices
• Receipts
• Bank statements
• Payroll records
• VAT documentation
• Contracts
• Accounting software records
• Tax calculations

Do not destroy or alter records because an investigation has started. If documents are missing, explain the position honestly and obtain advice about how to proceed.

What Happens at the End of an Investigation?

Once HMRC has reviewed the information, it may conclude that no changes are required. Alternatively, it may identify additional tax, interest or penalties.

HMRC’s process also allows taxpayers to challenge a decision where they disagree with the outcome. Its official compliance guidance explains the available stages of review and further action.

Before agreeing to a settlement or adjustment, it is important to understand what is being proposed and why.

When Should You Seek HMRC Investigation Advice?

Early advice can be useful if:

• The investigation covers several tax years
• HMRC requests extensive records
• Large amounts of tax are involved
• You disagree with HMRC’s interpretation
• Your records are incomplete
• You are unsure how to answer technical questions
• You believe penalties may be considered
• The investigation is affecting your business operations

Professional assistance can help ensure that your position is based on accurate records and a clear understanding of the issues.

Summary

HMRC Investigation Advice can help taxpayers and business owners approach a compliance check in a more organised and informed way. The most important steps are to understand HMRC’s request, keep accurate records, respond within appropriate deadlines and avoid providing unsupported information.

An HMRC compliance check does not automatically mean wrongdoing. Many investigations are about establishing the correct tax position. Where the issues are complex, early professional support can make it easier to manage communication and understand the options available.

For specialist support with tax investigations and related matters, Taxcom provides professional assistance for individuals and businesses.

Frequently Asked Questions

Does an HMRC investigation mean I have done something wrong?

No. HMRC carries out compliance checks for different reasons, including checking whether tax returns are accurate and complete. Being selected for a check does not automatically mean you have committed an offence.

Can I have an accountant deal with HMRC for me?

Yes. You can authorise a tax adviser or accountant to act on your behalf. The appropriate type of authorisation may depend on the tax matter and whether a compliance check is already underway.

How long does an HMRC investigation take?

There is no fixed timeframe. A simple check may be resolved relatively quickly, while a complex investigation involving multiple tax years or extensive records can take much longer.

Should I respond to HMRC without professional advice?

You can respond yourself, particularly where the issue is straightforward. However, professional advice may be helpful if the investigation is complex, involves significant amounts of tax or you are unsure what HMRC is requesting.