Bold claim: the attempt to modernise NS&I has been a full-spectrum disaster, and MPs areSoundly calling it a taxpayer risk. But here’s the full picture in plain terms.
Attempting to overhaul NS&I, the state-owned savings bank famous for its popular monthly premium-bond draw, has been described by Parliament’s spending watchdog as a complete and systemic failure. The Public Accounts Committee (PAC) says the taxpayer is exposed to unacceptable risk due to the ballooning cost of NS&I’s £3 billion modernisation programme.
NS&I, which also offers a range of savings accounts and is backed by the Treasury, launched a business transformation initiative in 2020—originally called Project Rainbow. The goal was to cut running costs and modernise operations. A key element was replacing Atos, the French firm that had run NS&I’s banking services and IT infrastructure for 27 years, with multiple smaller suppliers.
Costs have spiralled from £1.3 billion to £3 billion, yet, according to the PAC, little real transformation has materialised to date. NS&I now suggests it may need to extend its Atos contract until 2031, despite Atos itself facing financial distress in 2024.
The report highlights that replacing NS&I’s core banking engine is extremely high risk because it involves handling sensitive customer data, and the main work has not even begun. It notes that NS&I leadership understood the project would require meticulous, detailed management but did not provide a concrete plan for how that would happen.
NS&I is one of the UK’s largest savings institutions, holding more than £240 billion for about 25 million customers. Established in 1861, it uses savers’ money to fund public spending, and all deposits are 100% government-guaranteed.
The PAC findings argue that NS&I underestimated the project’s complexity and overreached with an ambitious target to complete the transformation by March 2024. There was an overreliance on consultants—about £43 million spent on external advice—and the organisation lacked an approved integrated plan and the necessary in-house skills.
Recently, the Treasury announced an additional £109 million for the programme, subject to parliamentary approval, even though NS&I cannot clearly say how much has already been spent.
Conservative MP Geoffrey Clifton-Brown, chair of the PAC, expressed concern: the project is off-track in a critical public sector organisation, and neither the committee nor the Treasury can reliably gauge costs or progress. He warned that without a realistic transformation plan, taxpayers risk throwing good money after bad.
NS&I responded by welcoming the PAC’s report and its recommendations. The bank stressed that its transformation programme remains essential to delivering cost-effective public finance and the services customers expect. NS&I said it is exploring options to improve programme delivery and will update the public in due course.
Key takeaways for beginners: modernising a large, government-backed bank is complex and expensive; governance, scoping, and expertise matter greatly; and patience plus rigorous, transparent planning are essential to avoid wasteful spending. Controversial angle to consider: should a public bank pursue such aggressive modernisation when project risk is so high and spending is opaque? What’s your take: is extensive reform worth the risk, or should NS&I focus on stabilising current operations? Share your thoughts in the comments.
