What is a VAT Inspection and What Does HMRC Actually Look For?

1. What is a VAT inspection?

A VAT inspection is a formal review of your business’s VAT records carried out by HM Revenue and Customs.

The purpose is simple: HMRC wants to confirm that you are charging and reclaiming the correct amount of VAT, and that your records support what you’ve declared on your VAT returns.

In most cases, HMRC will contact you in advance to arrange a convenient time. You typically receive around seven days’ notice, and HMRC will confirm what records they want to see and how long the visit is expected to take. You’re allowed to ask them to delay the visit if the timing is genuinely problematic, though this should not be used to buy time for record-keeping that should already be in place.

HMRC can also visit without prior notice. Unannounced visits tend to happen when there is a specific suspicion of fraud or deliberate non-compliance, since the element of surprise prevents records from being altered.

Most VAT inspections today are carried out remotely: HMRC will request documents digitally and conduct the review without visiting your premises.

In-person visits still happen, when the physical premises are relevant to understanding how the business operates. A factory, construction site, or retail unit often tells an inspector more than a spreadsheet can.

The difference between an inspection and a compliance check

These terms are often used interchangeably, but they describe different things.

A compliance check is the umbrella term HMRC uses for any review of your tax affairs.

A VAT inspection is one type of compliance check: it refers specifically to a review of your VAT records and returns, usually covering a defined period. Once HMRC opens an investigation, the scope can widen beyond VAT to include other taxes: Corporation Tax, Income Tax, PAYE… and the process becomes considerably more adversarial.

Looking for a tax specialist at this stage is strongly advisable.

2. What triggers a VAT inspection?

No single factor guarantees you’ll face an inspection, and HMRC does not publicly detail the exact criteria its systems use to select businesses. What is known is that most selections are risk-based, driven by HMRC’s internal data tools and a comparison of your submissions against industry benchmarks.

The triggers that commonly lead to a VAT inspection include:

• Submitting a large or unexpected VAT repayment claim:  this is by far the most common trigger, particularly if your business typically makes payments rather than receiving repayments
• Filing your first VAT return with a net repayment due
• Showing unusually large increases in VAT claims from one period to the next
• A poor compliance history: late submissions, missed payments, or previous penalties
• Operating in a sector HMRC has flagged as higher risk
• A discrepancy between your VAT returns and your annual accounts
• A tip-off from a third party regarding non-compliance

HMRC also conducts a proportion of inspections at random, as a way of testing if its risk-profiling process is working correctly. Even a well-run business with a clean record may occasionally be selected.

High-risk sectors

HMRC categorises certain industries as carrying greater inherent VAT risk.

These include:

• restaurants and hospitality,
• hair and beauty salons,
• construction,
• cash-intensive retail and
• businesses involved in exports or international supply chains.

Businesses in these sectors may face inspection more frequently than the national average.

Creative industries (like freelance designers, film production, photography, events, etc.) often have mixed VAT liability across their income streams, which can attract scrutiny. If you earn from both VATable and exempt activities, your partial exemption calculation is one of the first things an inspector will look at.

HMRC’s Connect software

HMRC uses a data-matching system called Connect, which cross-references information from VAT returns, company accounts, bank records, property data, and other tax submissions.

The system is designed to flag discrepancies that would be invisible to a manual review. If your VAT returns appear inconsistent with your bank deposits, turnover reported to Companies House, or the average returns for businesses in your sector, Connect may flag your account for review.

3. How likely is a VAT inspection?

For most small and medium-sized businesses with simple trading activity and a clean compliance history, a VAT inspection is not a frequent event. Most SMEs go five to ten years between inspections, and some never face one at all.

That said, the likelihood has been rising.

In the June 2025 Spending Review, the UK government committed £1.7 billion to HMRC over four years, funding an additional 5,500 compliance staff and 2,400 debt management staff. This is not a marginal increase – it shows a structural expansion of HMRC’s enforcement capacity. Businesses should expect compliance activity to intensify, and the probability of inspection to rise across the board.

The factors most likely to reduce your chances are:

• consistent VAT return submissions,
• clean records that reconcile with your accounts and
• trading patterns that match the expected profile for your sector.

If you submit a return that looks unusual – a sudden repayment claim, a spike in input VAT, a significant shift in turnover – it is worth contacting HMRC proactively to explain the reason.

4. What does HMRC look at during a visit?

HMRC’s examination during a VAT inspection covers both the figures in your returns and the supporting records that underpin them. The inspector will typically start with your most recent VAT return, then expand the scope depending on what they find.

The main areas HMRC examines:

• VAT return accuracy: are your output and input VAT figures correctly calculated and supported by invoices?
• Your annual accounts: do the sales figures reconcile with the totals declared on your VAT returns?
• Unusual or large transactions: any bigger purchases or sales are likely to attract individual scrutiny
• Cash accounting and retail schemes: if you use these, HMRC will check you’re applying them correctly
• Exports and international supplies: you’ll need documentary evidence that goods physically left the UK
• Partial exemption: if you make both VATable and exempt supplies, your apportionment method will be examined
• VAT on fuel and scale charges: one of the most common areas of error; if you claim VAT on car fuel, HMRC will check whether the correct scale charge has been applied
• Bad debt relief: HMRC will verify that you haven’t claimed this before the qualifying conditions are met
• Capital purchases: major asset purchases that affect VAT recovery will be reviewed in detail
• Making Tax Digital compliance: inspectors increasingly check that your digital records maintain a complete and unbroken digital link from source data to return submission

Missing invoices and incomplete records

Missing or incomplete invoices are among the most common issues HMRC finds during a VAT inspection.

Without a valid VAT invoice, you cannot reclaim the input VAT on a purchase: even if the expense is legitimate and the VAT was genuinely paid. HMRC’s position is clear: the right to reclaim input VAT is conditional on holding the correct documentation at the time the claim is made.

If you have gaps in your records, the inspector will request explanations and may disallow the relevant input VAT claims. In cases where records are systematically incomplete, HMRC may issue a best judgment assessment, estimating the VAT liability based on available information – an outcome that is almost always worse than the actual position would have been.

Maintain a complete purchase ledger, reconcile it regularly against your VAT claims, and keep all VAT invoices (including digital copie) for at least six years.

5. How long does a VAT inspection last and how far back can HMRC go?

The standard duration of an on-site VAT inspection is one to four days.

For smaller businesses with straightforward VAT affairs, it may be completed in a single day. Larger or more complex businesses, or those where HMRC has identified specific risks, can expect the process to take longer. At the end of the visit, if the inspector has unresolved queries, you’ll typically be given up to 30 days to provide additional documentation.

The overall timeline of an inspection – from initial contact to final written findings – can stretch to several months, if there are disputes over records or if HMRC’s queries require significant research on your part.

In terms of how far back HMRC can look, the standard window is four years from the current period. This means an inspection opened today can examine VAT returns going back to early 2022. If HMRC determines that errors resulted from careless rather than deliberate behaviour, this four-year limit applies.

However…

If HMRC suspects deliberate underdeclaration or fraudulent behaviour, the time window extends to 20 years. A business that can demonstrate errors were genuine and inadvertent limits HMRC’s reach considerably. A business where HMRC concludes the errors were intentional faces potential examination of two decades of records.

6. What happens if HMRC finds errors?

Not every inspection ends with a penalty.

If HMRC finds your records in good order and your returns accurate, the matter is closed. In practice, however, inspectors almost always have at least some follow-up queries, and some level of adjustment is common even in routine inspections.

When errors are identified, the outcome depends on their nature and scale:

• Minor errors: small underpayments within HMRC’s permitted correction threshold can be adjusted on your next VAT return, without a formal assessment
• Larger errors: HMRC issues a formal assessment detailing the additional VAT owed, along with interest charged from the date the VAT was originally due
• Systemic errors or suspected deliberate behaviour: HMRC escalates to a full investigation, potentially covering multiple taxes and extending the look-back period

The table below summarises how penalties are calculated based on the type of error and whether it was voluntarily disclosed.

In all cases, HMRC charges interest on underpaid VAT at the Bank of England base rate plus 4%, calculated from the date the VAT was originally due. This is separate from and in addition to any penalty charged.

Careless errors

Careless errors are mistakes HMRC considers avoidable with reasonable care but not intentional.

Penalties for careless errors range from 0% to 30% of the unpaid VAT, depending on whether you disclose the error unprompted (lower penalty) or only when HMRC raises it (higher penalty). Cooperation and transparency consistently lead to lower penalties.

Deliberate errors

Where HMRC concludes an error was made deliberately – meaning you knew the position was wrong and submitted returns anyway – penalties range from 20% to 70% of the VAT owed. The difference between whether you disclosed voluntarily or were caught by HMRC makes a huge impact within that range.

Fraudulent behaviour

If HMRC identifies deliberate concealment alongside the deliberate error, penalties can reach 100% of the unpaid VAT. At this level, the matter typically moves beyond a civil penalty process into potential criminal investigation. The 20-year look-back period also applies.

7. How to prepare for a VAT inspection

The best preparation for a VAT inspection is maintaining good records consistently, and not scrambling to organise them when HMRC makes contact. That said, there are practical steps to take once you receive notification.

Before the inspection, gather and review the following:

• All VAT invoices for purchases and sales covering the period under review
• Bank statements reconciled against your VAT returns
• Your most recent annual accounts and any management accounts for the relevant period
• Evidence of exports if applicable: shipping documents, signed delivery notes, proof of goods leaving the UK
• Any large or unusual transactions: have a clear explanation ready for each
• Your partial exemption calculation if your business makes both VATable and exempt supplies
• Evidence of scale charge payments if you claim VAT on business car fuel
• A record of any adjustments or corrections made to previous VAT returns and the reasons for them
• Confirmation that your MTD software is up to date and that your digital link is intact from source data to submitted return

If there are errors or omissions you’ve already identified, consider disclosing them proactively before the inspection begins. Voluntary disclosure consistently results in reduced penalties. Trying to explain away errors that HMRC subsequently uncovers independently puts you in a worse position, both financially and in terms of how the inspector approaches the rest of the review…

8. How to appeal an HMRC decision? When to contact an accountant?

If you disagree with HMRC’s findings, you have the right to appeal. The process runs in stages.

Your first option is to request an internal review. This must be done in writing within 30 days of HMRC’s decision. The review is carried out by a different HMRC officer who was not involved in your case. HMRC has 45 days to complete the review and notify you of the outcome.

If the review does not resolve the dispute, or if you prefer to skip directly to independent adjudication, you can appeal to the First-tier Tribunal (Tax). This is an independent body that examines the facts and the legal arguments from both sides and reaches its own conclusion. The tribunal can uphold HMRC’s decision, reduce it, or find in your favour entirely.

Alternative Dispute Resolution (ADR) is available at any stage of the process – during the inspection itself if progress has stalled, or after HMRC has issued a formal decision. An HMRC-appointed mediator works with both sides to reach a resolution. ADR does not affect your right to appeal through the tribunal route, but the 30-day time limit for requesting a formal review or appeal must still be observed.

Throughout any appeal process, professional representation makes a material difference to outcomes. HMRC operates within defined legal limits, and an experienced adviser can ensure those limits are enforced.

Engaging an accountant or VAT specialist to attend the inspection with you – or to handle communications on your behalf – is strongly advisable for businesses with complex VAT affairs or any identified exposure.

HMRC must be given information it is legally entitled to, but that does not mean you should volunteer information beyond what is required. A specialist ensures the boundaries are correctly observed.

WallsMan Creative works exclusively with freelancers, sole traders, and limited company directors in the UK’s creative industries. If you’re facing a VAT inspection – or want to make sure your VAT records are inspection-ready before HMRC makes contact – get in touch to see how we can help.