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      Spending Review

      One of the ‘winners’ from the Spending Review on 11 June 2025 was HMRC who received additional funding focussed on two key areas: closing the tax gap and digitalisation.

      The £1.7 billion package aimed at closing the tax gap includes measures to modernise HMRC’s use of data, increase the use of digital tax services, and fund an additional 5,500 compliance staff and 2,400 debt management staff. The Government expects this to raise £7.5 billion additional tax revenue a year by 2029/30, which would indeed be a significant dent in the tax gap.

      The second area of spending is focussed on tax digitisation in the areas of customer interactions and IT and data infrastructure.

      Sharon Baynham

      Director, Tax Policy

      KPMG in the UK


      In relation to customer interactions, the Government will invest a further £500 million with the aim of making HMRC a ‘truly digital-first organisation’. The Spending Review anticipates that by 2029/30, a minimum of 90 percent of customer interactions will be digital self-serve, up from around 70 percent in 2025. The investment is to improve digital services so people can get the information they need without having to call or write to HMRC and will enable the use of artificial intelligence (AI) to help taxpayers with their enquiries and to raise productivity within HMRC. The Government will continue to ensure alternative channels, including phonelines, are still there for those who need them.

      The intention is also that HMRC will eliminate all outbound post, with limited exceptions such as letters which generate revenue for the Exchequer, reducing the number of letters HMRC send by 75 percent and saving £50 million a year by 2028/29.

      The spending review document also highlights that the Valuation Office Agency will merge into HMRC by the end of 2025/26. 

      It is interesting to note that there has been a steady increase in staff investment under this Government. At the time of the election the Government announced it would invest in 5,000 additional compliance staff and at Autumn Budget 2024 a further 1,800 debt management staff were promised. Further additions were made at the Spring Statement where the Chancellor needed to rely on further reductions in the tax gap.

      The Spending Review states that the additional funding, together with the Exchequer Secretary to the Treasury becoming Chair of HMRC’s Board, reflects a commitment to closing the tax gap and modernising HMRC. These are to be welcomed even though it has to be acknowledged that reducing the tax gap is difficult to do in practice.

      Tax Policy Making Paper

      Hot on the heels of the Spending Review, the Government issued a ‘Tax Policy Making Principles’ paper on 12 June 2025. Aimed at providing a stable tax system that supports economic growth, this document sets out the principles that will guide how the Government will design and deliver tax policy changes.

      The paper is divided into four areas:

      • Predictability and stability: The Government re-confirms that there will be only one fiscal event a year. It will also indicate a clear direction of travel for the tax system, citing the Corporate Tax Roadmap which was published at Autumn Budget 2024;
      • Consultation approach: The Government will issue technical consultations flexibly throughout the year rather than launching multiple ones on a specific day. The Government will also approach engagement with stakeholders more flexibly; and
      • Transparency: The Government will ensure that tax policy making is open and transparent. It will continue to publish tailored ‘Tax Impact and Information Notes’ when it lays tax legislation and will continue to work closely with the Office for Budget Responsibility to publish certified policy costings at the Budget. It will also explore options for providing a dedicated resource that will track policy development through the policy making cycle.

      We are still expecting the publication of the HMRC Transformation Roadmap which is expected to bring together strategic and transformation ambitions for HMRC to be a digital first organisation.

      For further information please contact:

      Our tax insights

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