VAT due diligence services provide a detailed review of your VAT position before key business decisions are made. Without sufficient due diligence, businesses can remain exposed to historic errors, supply chain risks and incorrect VAT treatment that may not be immediately visible. These issues can lead to severe financial and legal consequences if identified by HMRC, including assessments, penalties and the denial of input VAT recovery.

At The VAT People, we carry out due diligence with a clear focus on risk, accuracy and commercial impact. Our team reviews transactions, VAT returns and internal processes to identify areas where liabilities may arise, including exposure linked to supplier relationships and wider supply chain activity. Where issues are found, we set out the position in practical terms, so you can understand the potential cost, the level of risk and the steps available to address it.

Our approach is grounded in technical VAT knowledge and direct experience of dealing with HMRC, allowing us to identify issues that may not be obvious from a surface-level review. This includes areas where HMRC may challenge input tax recovery, or take the view that the only reasonable explanation for a transaction is linked to non-compliance within the supply chain.

If you are entering into a transaction, reviewing your current position or looking to reduce exposure ahead of HMRC scrutiny, we can provide a clear assessment of your VAT risk.

Contact The VAT People to arrange a confidential discussion and take a closer look at your position before issues arise. Call us on 0161 477 6600 or fill out an online contact form.

When might you need VAT due diligence services?

You may need VAT due diligence services when entering into transactions or making business changes where VAT exposure is not immediately visible. In many cases, liabilities sit within historic transactions, legacy systems or incorrect treatment of supplies, only becoming apparent once a detailed review is carried out. Identifying these issues in advance allows you to assess risk, factor potential costs into negotiations and avoid unexpected assessments or penalties after completion.

Common scenarios include:

• Mergers and acquisitions: reviewing the target business’s VAT position to identify unpaid liabilities, incorrect VAT treatment or exposure to HMRC enquiries that could transfer to the buyer.
• Business restructuring: assessing VAT implications when transferring assets, changing group structures or altering supply chains, where errors can arise in areas such as TOGC treatment or partial exemption.
• Disposals and carve-outs: checking that VAT has been applied correctly on assets, property or business units being sold, and that no historic risks remain with the entity.
• International expansion: reviewing VAT registration requirements, cross-border supply rules and reporting obligations in new jurisdictions to avoid non-compliance and double taxation.
• HMRC risk management: identifying areas where previous VAT returns may be incorrect or incomplete, allowing disclosures to be made on a managed basis rather than in response to an enquiry.
• Systems and process changes: testing whether accounting systems, invoicing processes and VAT coding are operating correctly following operational or structural changes.

At The VAT People, our background is rooted in HMRC training, providing direct insight into how VAT risks are identified, reviewed and challenged. With 29 years of operating experience, the business brings long-standing expertise to VAT due diligence.

The importance of VAT due diligence for your business and interests

Where detailed VAT diligence is not carried out, VAT issues can remain hidden until identified by HMRC, at which point the financial and operational impact can be more difficult to manage.

Uncovered VAT liabilities can affect business owners in several ways, particularly as HMRC has the authority to recover underpaid VAT and apply additional charges. In some cases, HMRC may refuse your right to deduct input tax where there are concerns about the validity of transactions or the integrity of the wider supply chain. This can result in the denial of input VAT, even where goods or services have been received, if HMRC considers that the only reasonable explanation is that the transactions were connected to VAT fraud or non-compliance, including scenarios assessed under the Kittel principle.

Key areas of impact include:

• Retrospective VAT assessments: HMRC can reclaim underpaid VAT for up to four years, or up to 20 years in cases of deliberate behaviour, creating substantial unexpected liabilities.
• Interest and penalties: additional costs are applied on top of the VAT owed, increasing overall exposure and affecting cash flow.
• Denial of input VAT recovery: HMRC may refuse your right to deduct input tax where due diligence on suppliers or transactions is considered insufficient, particularly where risks exist within the supply chain or fall within the scope of the Kittel principle.
• Supply chain risk exposure: involvement, even indirectly, in a non-compliant supply chain can lead to assessments, blocked VAT recovery, and increased scrutiny from HMRC.
• Transaction disruption: during mergers, acquisitions or disposals, identified VAT risks may lead to price renegotiations, indemnities, or withdrawal from the deal.
• Funding and investment impact: lenders and investors may reassess risk where VAT issues are identified, potentially delaying or altering funding arrangements.
• Operational disruption: HMRC enquiries can require detailed reviews of records and systems, placing pressure on internal teams and increasing professional costs.
• Historic errors carrying forward: liabilities can transfer with a business, meaning buyers may inherit VAT risks linked to previous ownership or past transactions.
• Director and business accountability: HMRC holds the business responsible for VAT errors, regardless of how they arose, and expects corrective action within defined timeframes.

By identifying these issues at an early stage, VAT due diligence allows you to quantify potential exposure, address errors in a controlled manner, and factor any risks into negotiations or future planning. Taking this step before HMRC intervention or transaction completion places you in a stronger position to manage outcomes and avoid unexpected costs.

To protect your interests and gain a clear understanding of your VAT risk, speak to The VAT People about expert VAT due diligence services. Get in touch today to arrange a confidential discussion.