Select committee: Public Accounts Committee
Conclusion 5
23rd Report - The cost of the tax system
Published 30 Apr 2025
Addressed to HM Treasury
Public Accounts Committee The cost of the tax system All items in this report Report on parliament.uk ↗ Inquiry on parliament.uk ↗
Conclusion (the committee's words)
It is of the utmost importance that HMRC learns lessons from its experience of implementing Making Tax Digital (MTD) and puts customer needs at the heart of plans to improve digital services. The previous Public Accounts Committee reported in 2023 that HMRC had lost sight of the need to put taxpayers at the heart of changes to the tax system. MTD was imposed on businesses without much consultation, and without businesses knowing what the administrative costs were going to be. HMRC completed the rollout of MTD for VAT in 2022, and plans to extend it from 2026–27 to many Income Tax Self Assessment taxpayers. HMRC estimates that MTD imposed net costs on VAT traders of around £300 million over the period 2019–20 to 2023–24. In February 2024, HMRC estimated that extending MTD to Income Tax Self Assessment will impose transitional costs of over £500 million on taxpayers, and will impose ongoing costs on taxpayers which will exceed their ongoing savings by 6 around £200 million each year. There is no strong evidence to date to suggest productivity improvements or other benefits for most VAT traders following the introduction of MTD. recommendation HMRC should ensure it conducts sufficient research into customer needs and design digital programmes and systems which meet those needs. HMRC should evidence its assessment of customer needs in its business cases and in public documents, including Tax Information and Impact Notes.
From: Public Accounts Committee, 23rd Report - The cost of the tax system (HC 645), 30 April 2025
Government response
The government responded to the whole report on 18 September 2025.
Summary written by Accountability Index from the government's response. It is not the government's own words.The government states that it "agrees with the Committee's recommendation" on each of the report's recommendations, and reports that several are already implemented while others carry target dates.
- On simplification, the government will publish HMRC's Transformation Roadmap in summer 2025, which "will include the metrics HMRC will use to report progress".
- On trust, the government agrees with both recommendations and describes them as "Recommendation implemented", citing annual customer surveys, complaints data and focus groups.
- On compliance productivity, it says HMRC "will recruit an additional 5,500 compliance staff by March 2030", alongside other measures to close the tax gap.
- On legacy IT, HMRC "will write to the Committee" on its remediation plans, forecast cost and expected savings, with a target implementation date of September 2025.