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Delays and mistakes at HMRC

Journalist: Hereward Mills, FT Adviser

ended 15. June 2026

New data shows complaints to HMRC about mistakes and delays rose 66 per cent last year. 

Similarly, accountancy firm UHY Hacker Young found that taxpayers spent a collective 558 years calling HMRC. 

Advisers - are you finding it increasingly difficult to deal with HMRC, and why? 

Best, 

Hereward 

2 responses from the Newspage community

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HMRC delays are becoming a hidden tax on people’s time, energy and confidence. It is not just advisers sitting on hold getting frustrated; it is business owners unable to plan, clients waiting for clarity, and normal people being made to feel like they have done something wrong simply because the system cannot answer them quickly enough.

The problem is that HMRC is still operating like tax is just admin. It is not. Tax affects mortgages, cash flow, retirement planning, business decisions and whether people feel in control of their own money.

Most advisers accept complex cases take time. What is harder to accept is silence, inconsistency and having to chase basic answers through a system that often feels designed to wear people down.

We keep telling people to take responsibility for their finances, but the institutions around them need to meet them halfway. A modern tax system should not require 558 years of collective phone time to function.
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The reported increase in complaints is unsurprising. When a tax system becomes increasingly complex, delays and disputes become more likely, regardless of how well the administrator is run.

Years of adding new rules and exceptions without simplifying the old ones have created more opportunities for mistakes by taxpayers and HMRC alike. Every additional layer generates more disputes, more correspondence and more pressure on an already stretched system. Advisers risk spending as much time interpreting rules and resolving administrative issues than helping clients make better financial decisions.

A simpler, more stable tax code would improve compliance, reduce costs and free HMRC to focus its resources where they add the most value. Collecting the right tax from more people, more efficiently, is ultimately more effective than continually adding new rules to an already overcomplicated system.