Select committee: Public Accounts Committee
Recommendation 13
58th Report - Government services: Identifying costs
Published 12 Dec 2025
Addressed to HM Treasury
Public Accounts Committee Government services: Identifying costs and generating income All items in this report Report on parliament.uk ↗ Inquiry on parliament.uk ↗
Recommendation (the committee's words)
Legacy systems are problematic for two main reasons. Firstly, they are a significant driver of cost, comprising around one-third of government’s technology estate but representing almost half of its costs.30 This may not include the excess costs that arise from people having to work manually around cumbersome, old systems and poor-quality data from fragmented data sources.31 Secondly, legacy systems are an impediment to being able to gather better cost data as data extraction often requires manual effort as repeated point-in-time exercises.32 The Cabinet Office recognises the need for Permanent Secretaries to have a good understanding of their legacy systems. The Department for Science, Innovation and Technology (DSIT) has baselined government legacy systems and reviewed departmental bids for funding in the 2025 Spending Review to mitigate the risks such systems pose. It told us that although there has been a step- change in how senior leaders are thinking about their legacy systems, there were not as many bids for funding as expected.33
From: Public Accounts Committee, 58th Report - Government services: Identifying costs (HC 1421), 12 December 2025
Government response
The government responded to the whole report on 1 April 2026 (deadline 12 February 2026).
Summary written by Accountability Index from the government's response. It is not the government's own words.The government agrees with the Committee's recommendations on cost ownership, costing guidance, single service owners and data leadership, and disagrees with one on prioritising legacy systems for further investigation.
- On accountability for costs, the government agrees and sets a target date of July 2026: the Treasury will issue an updated Dear Accounting Officer letter setting expectations that senior leaders identify, use and improve service-level cost information.
- On the six-month request to prioritise legacy systems for investigation, the government disagrees, stating it "does not agree that this recommendation should be an immediate priority of the next 6 months" given work already in progress.
- On the baselined list of legacy systems, the government agrees and will share "the available data" with the Committee chair by March 2026, but does not intend to make the list publicly available because of cyber-attack concerns.
- On Senior Service Owners, the government agrees with a target of March 2027: it will issue a letter encouraging Permanent Secretaries to assess gaps within 6 months and appoint SSOs within 12 months, with the timescale "accelerated if possible".