HM Revenue & Customs has come under renewed criticism for what tax experts call a “deeply unfair” imbalance between the interest it charges taxpayers and the rate it pays on refunds, raising broader concerns about the trust, transparency and efficiency of the UK tax system.
According to an analysis by the auditing, tax and consulting firm Blick Rothenberg, taxpayers who default on their payments are currently charged daily default interest of 7.75 percent. In contrast, those who owe money to HMRC will receive interest of just 2.75 per cent on the repayment, even if the delays extend over many months.
Tom Goddard, the company’s deputy chief executive, said the inequality creates a system that appears to be heavily tilted in the tax authority’s favour. He argued that while taxpayers face increasing financial penalties if delays occur, HMRC itself does not face similar consequences if repayments are slow.
The imbalance becomes even clearer when penalties are taken into account. Taxpayers who fail to pay their debts within 12 months may face additional fees of up to 15 percent of the outstanding amount, as well as further penalties for late filing of tax returns. In contrast, there is no comparable compensation mechanism if HMRC delays repayments, even if individuals or businesses suffer financial consequences as a result.
Goddard pointed to the real impact of these delays, citing cases where taxpayers have waited more than a year for refunds to be processed. In one case, a client missed out on a significant investment opportunity after funds earmarked for use were tied up in a lengthy HMRC repayment process. Despite repeated attempts to resolve the issue, the delay persisted due to internal administrative complications and a lack of clear accountability within the organization.
The broader concern is not just financial inequality but also operational friction in resolving disputes, he said. Taxpayers seeking to recover funds often face a lengthy and complex process involving multiple departments and requiring repeated follow-ups. For many, the cost of professional advice required to navigate the system can offset the financial benefit from the repayment itself.
This dynamic risks creating the impression that the system is both inefficient and controversial. While HMRC largely blames delays on administrative pressures, critics argue that the burden of these inefficiencies falls disproportionately on taxpayers, particularly at a time when many individuals and businesses are already under financial strain.
The issue also raises questions about HMRC’s wider transformation agenda. One of the stated priorities in the “Transformational Roadmap” is to improve day-to-day performance for individuals and businesses, with a transition to a more automated, digitally focused system that is expected to handle up to 90 percent of requests.
Although digitalization is expected to streamline processes and reduce the estimated annual cost of tax administration by £20 billion, there is skepticism whether it will solve underlying service challenges. Critics argue that without sufficient investment in expertise and support, automation alone may not address delays or improve outcomes for taxpayers.
Trust remains a central theme of the debate. HMRC has identified closing the UK’s £46.8bn tax gap as a key objective, but advisers point out that restoring confidence in the system is just as important. They argue that a more balanced approach to interest rates and compensation could encourage greater cooperation and compliance from taxpayers.
There is also a behavioral dimension to consider. If taxpayers perceive the system to be unfair, they may be less inclined to proactively contact HMRC or prioritize timely compliance. Conversely, a system that treats delays more equally on both sides could promote a more cooperative relationship between the tax authority and the people it serves.
For now, however, interest rate inequality remains a point of contention. As HMRC’s performance comes under increasing scrutiny, pressure is likely to increase for reforms that address both the financial imbalance and the operational challenges that underlie it.
Without such changes, critics warn, the gap between policy intentions and taxpayer experience will continue to widen, undermining trust in a system whose effective functioning relies on voluntary compliance.
