HMRC VAT Compliance Checks Are Not Audits

Let's clear that up first. HMRC does not call them audits. They call them compliance checks. The difference matters because a compliance check is usually narrower in scope. HMRC picks a specific period, a specific return, or a specific area of your VAT affairs and asks you to justify it.

A full VAT inspection is rarer. Most checks are desk-based. HMRC sends a letter, asks for certain records, and you respond. If the numbers stack up, the check closes. If they do not, HMRC issues an assessment for underpaid VAT plus interest and possibly penalties.

As ICAEW qualified accountants, we handle these checks regularly. The process is predictable once you know how HMRC operates. Here is exactly what a VAT accountant does when that letter arrives.

First Contact: What HMRC Actually Sends

The letter will arrive on headed paper from HMRC's VAT compliance team. It will quote your VAT registration number and specify the period under review. It will ask for specific records: sales invoices, purchase invoices, VAT account summaries, and possibly your bookkeeping files.

HMRC usually gives you 30 days to respond. Sometimes 14 days if they suspect a serious problem. Do not ignore the letter. Ignoring it does not make it go away. HMRC will issue a formal information notice under Schedule 36 of the Finance Act 2008, and penalties for non-compliance start at £300.

A VAT accountant will review the letter immediately. They check the scope of the request. Is HMRC asking for everything or just specific items? The response strategy depends on the answer.

What the Accountant Does in the First 48 Hours

First, they confirm receipt with HMRC. This buys time and shows cooperation. They note the HMRC officer's name and contact details. They check whether the officer is from the local compliance team or the central team in Manchester or Newcastle.

Second, they pull the relevant VAT returns and working papers. If you use accounting software like Xero, FreeAgent, or QuickBooks, the accountant exports the VAT return data and the underlying transaction reports. They check that the figures on the returns match the software output.

Third, they assess the risk. Is there a genuine error? Is it a timing difference? Or is HMRC simply checking a random sample? Most checks are random. HMRC has a target to open a certain number of checks each year. Yours might be nothing more than a statistical selection.

Gathering the Evidence

This is where the real work happens. HMRC wants to see that your VAT returns are correct. They want to trace individual transactions from your sales invoices through to the VAT return figures.

The accountant will prepare a schedule showing:

  • Total sales per your accounting records for each VAT period under review
  • Total output VAT declared
  • Total purchases per your records
  • Total input VAT claimed
  • A reconciliation between the two

If you use the Flat Rate Scheme, the accountant checks that the correct flat rate percentage was applied. If you are on the standard scheme, they check that you accounted for VAT correctly on each sale and that you only claimed input VAT on valid business purchases.

Common issues that surface here include:

  • Claiming input VAT on cars with private use
  • Missing VAT on exempt supplies like insurance or education
  • Errors on partial exemption calculations
  • Incorrect treatment of imports and exports
  • Missing VAT on director's personal purchases put through the business

Director's Personal Spending and VAT

This one catches people out regularly. If a director buys personal items using the company credit card and those items appear in the purchase ledger, the input VAT is not recoverable. HMRC will pick this up. The accountant will identify these items before HMRC does and either remove them from the claim or prepare a justification if the items have a genuine business purpose.

The same applies to entertaining. Client entertaining is generally not recoverable for VAT purposes. Staff entertaining is recoverable, but only if certain conditions are met. HMRC checks these distinctions carefully.

Responding to HMRC

Once the evidence is gathered, the accountant drafts a formal response. This is not a casual email. It is a structured letter or a submission through HMRC's online portal. It sets out the facts, provides the schedules, and addresses any specific questions HMRC raised.

The accountant will also flag any errors they found. If there is an underpayment, they will disclose it voluntarily. Voluntary disclosure reduces penalties significantly. If there is an overpayment, the accountant will claim it back.

HMRC then reviews the response. They may come back with follow-up questions. They may ask for additional invoices or explanations of specific transactions. The accountant handles each query in turn.

When HMRC Wants to Visit

Some compliance checks turn into visits. HMRC will send an officer to your premises or your accountant's office. They will want to see your accounting system, talk to whoever prepares the VAT returns, and physically inspect records.

A VAT accountant will prepare you for this visit. They will run through likely questions, ensure all records are organised, and sit in on the meeting. They will handle the technical VAT questions while you focus on the operational side of your business.

If the visit uncovers issues, the accountant negotiates the outcome. They argue for lower penalties, agree payment plans, and ensure HMRC does not apply penalties where you have a reasonable excuse.

Penalties and Interest: What the Accountant Can and Cannot Do

If HMRC finds an underpayment, they will charge interest from the date the VAT should have been paid. That is statutory. The accountant cannot negotiate interest away.

Penalties are different. HMRC applies penalties based on the behaviour that caused the error. The categories are:

  • Careless: 0% to 30% of the underpayment
  • Deliberate but not concealed: 20% to 70%
  • Deliberate and concealed: 30% to 100%

A good accountant argues for the lowest penalty percentage. They show HMRC that the error was careless, not deliberate. They demonstrate that you had reasonable systems in place. They highlight your cooperation throughout the check.

If HMRC insists on a higher penalty, the accountant can appeal. The first stage is a statutory review within HMRC. If that fails, the case goes to the First-tier Tribunal. Most cases settle before reaching the tribunal.

How Long Does a Compliance Check Take?

A straightforward desk-based check might close in 8 to 12 weeks. A complex check with a visit and multiple queries can take 6 to 12 months. The timeline depends on how quickly you respond, how complex the issues are, and how busy the HMRC officer is.

The accountant keeps the process moving. They respond within the deadlines. They chase HMRC for updates. They ensure the check does not drag on unnecessarily.

What You Should Do While the Accountant Handles the Check

Keep running your business. That is the main thing. The accountant deals with HMRC so you do not have to.

Do provide any records the accountant asks for promptly. Do not destroy or alter any records related to the period under review. That is a criminal offence under the Value Added Tax Act 1994.

Do not contact HMRC directly unless the accountant tells you to. Multiple voices confuse the process. Let one person handle the correspondence.

Preventing Future Checks

Once the check closes, the accountant will review your VAT processes. They will identify what went wrong and fix it. They might recommend switching to a different VAT scheme, improving your bookkeeping, or using software that flags errors automatically.

Most businesses that go through a compliance check come out with better systems. The process is stressful but it forces you to tighten up. That is a positive outcome in the long run.

If you want to understand how VAT works at a basic level, our VAT fundamentals guide covers the key rules for UK businesses. For a full overview of how we handle VAT and other tax matters, see our services page.

Final Word

An HMRC VAT compliance check is not the end of the world. It is a process. You gather evidence, respond to questions, and reach a conclusion. A specialist VAT accountant handles the technical work and the negotiation so you can focus on what you do best.

If HMRC has opened a check on your VAT returns, call us. We will take it from there.