Understanding the Role of HMRC Informers in Reducing the UK’s Tax Gap

The term “tax gap” has been a part of fiscal discussions in the UK for nearly two decades, signifying the difference between the tax revenue HMRC anticipates and what it actually collects. Despite a reduction from 7.5% in 2005 to 4.8% in 2021/22, the gap still represents a substantial £35.8 billion.

The Role of HMRC’s ‘Connect’ System

HMRC utilises several strategies to close this gap, notably through the ‘Connect’ system, a sophisticated computerised network that analyses diverse data sources to identify potential underreporting by taxpayers.

Whistleblowers: A Double-Edged Sword

HMRC also relies on public reports. There is an anonymous form on HMRC’s website for individuals to report suspected tax fraud or evasion. In the fiscal year 2022/23, HMRC awarded over £509,000 to informants aiding in successful cases, a significant increase from previous years.

Interestingly, the motivations behind these disclosures are varied. While the financial reward, averaging £35.98 per valid claim, is a factor, many informers are motivated by personal grievances, such as disputes among ex-spouses or issues with employers. Nonetheless, the information they provide is invaluable for initiating detailed investigations.

The Value of Professional and Financial Institution Reports

Reports from banks, building societies, and other entities under the Proceeds of Crime Act 2002 and the Terrorism Act 2000 are crucial. These institutions are required to report any suspicious activities to the Financial Intelligence Unit (FIU). In 2022/23, the FIU received over 850,000 ‘suspicious activity reports’ (SARs), with the majority filed by banks.

This data is essential for HMRC’s ‘Connect’ system, which uses social network analysis to detect hidden patterns and relationships. Approximately one in four HMRC investigation cases are triggered by insights from SARs.

The Future of Digital Compliance

The regulatory landscape is tightening, especially with digital platforms like Etsy, Airbnb, and Uber now required to report users’ income to HMRC, a part of a global effort to improve tax compliance.

Conclusion: The Integral Role of Data in Tax Compliance

As tax enforcement becomes increasingly data-driven, understanding these mechanisms is crucial for compliance and business operation.

For personalised advice on navigating these changes, contact Jon Davies Accountants. Our expertise ensures your business remains compliant and successful.


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