Tax gap estimated at 5.3%
The tax gap estimate – the difference between what tax is expected to be paid and actually paid – was 5.3% for the 2023 to 2024 tax year, figures published today (19 June 2025) show. While £46.8 billion was unpaid in the 2023 to 2024 tax year, HM Revenue and Customs (HMRC) collected £829.2 billion, representing 94.7% of all tax due.