The system being rolled out across government to support citizen’s access to a comprehensive range of services was backed by tens of millions pounds from its home department last year

The ongoing rollout of the GOV.UK One Login system received DSIT funding of more than £80m to support programme delivery in the 2025 financial year.

Figures recently disclosed by digital government minister Ian Murray reveal that about £250m in gross spending was recorded by the Department for Science, Innovation and Technology in FY25 to support efforts focused on “Modernising and reforming the work of the government functions”.

A little over £200m of this was committed for “programme costs” – the largest chunk of which was £82.8m provided for the One Login project. The 2024/25 year was scheduled to be the final year of programme delivery – but the timeline for implementation has been pushed back to 2028.

The overall government funding during last year for the new government-wide sign-in system was recorded as £133.7m, the latest set of government major project data reveals. Overall delivery costs for the scheme are currently estimated at £342.2m.

Other programmes of work that received a chunk of DSIT’s £250m modernisation funding in FY25 include GOV.UK, which was backed £21.6m. Some £9.5m was committed to support the work of the directorate of the government chief product officer, while £15.9m was dedicated to non-specified ‘products and services’, and a further £73.7m was made available for ‘other’ programmes, including the GOV.UK Notify public sector messaging system.

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Alongside the programme funding, DSIT also spent a total of £46.4m on “gross administration costs”. The majority of this – £28.6m – enabled the “purchase of goods and services”, according to the information cited by Murray.

Another £17.7m of funding supported staff costs, while £2,000 was racked up in “other operating costs”.

The recent government-wide major project roundup said that “the decision to keep the programme on the GMPP for a further three years supports the ambition to complete onboarding of all central government services”.

“While the programme continues to meet key internal delivery targets, the schedule remains dependent on departmental onboarding timelines and the coordination of benefits realisation across government,” the document added. “The leading issue facing the programme relates to service migration, however a number of treatments and mitigations are in place to effectively counteract service onboarding slippage.”

It was recently revealed that One Login has regained its government-issued digital identity trustmark, nine months after the certification dropped.

PublicTechnology also understands that the Government Digital Service has put in place new measures intended to better track – and prevent – any potential future accreditation lapses.