The UK’s National Audit Office has cast doubt on the government’s claim that artificial intelligence and digital transformation could save the public sector £45 billion (approximately $58 billion) annually, finding that departments have not produced consistent or detailed methodologies for how those savings would be achieved.
In a report published July 20, the NAO warned that government departments risk overstating the potential of AI-driven efficiencies without properly accounting for the workforce, skills, and ethical implications of deploying the technology at scale.
“The published efficiency plans do not provide details of how departments derived their expected workforce efficiencies,” the report states. “There is a risk that departments are not identifying and estimating workforce efficiencies consistently. There is also a more fundamental risk that departments may not be identifying the full opportunities for efficiencies from reshaping workforces in response to wide-ranging digital and AI adoption.”
The NAO’s assessment echoes earlier skepticism from Parliament’s Science, Innovation and Technology Committee, which described the £45 billion figure as “worryingly optimistic” and an example of “hype” that could impede genuine progress. The Institute for Government had also questioned the number, noting that most government spending goes to salaries or infrastructure.
The report identifies several barriers that conventional efficiency projections tend to overlook. The public sector lacks the technology and digital skills needed to realize AI savings. Workforce planning remains disconnected from digital transformation plans — Cabinet Secretary Dame Antonia Romeo acknowledged that current plans “do not sufficiently reflect how AI and technology are going to change the shape of the civil service.” And ethical concerns may restrict AI deployment in some contexts, limiting the savings that can realistically be achieved.
The NAO’s core recommendation is that civil service leaders must reflect the impact of AI and digital change in long-term workforce planning, including implications for staffing numbers, roles, skills, and the nature of work itself. Digital and AI plans should sit alongside strategic workforce plans, and departments must prepare detailed, consistent estimates of workforce efficiencies.
Without rigorous, data-driven planning, the report suggests, the promised savings remain speculative.
Sources: Auditors tell UK government to do the math before banking on £45B AI savings (The Register, July 2026)