HM Treasury has invested more than £63.6 million on cloud services over the past three years, with the department moving to a model of 100% reliance on cloud and zero on-premise IT infrastructure as part of a broader digital transformation push across public spending and tax policy.

The State of Digital Government Review shows that around 60% of public sector IT systems now operate in the cloud, reflecting a steady shift in how departments deliver services.

The data was retrieved under the Freedom of Information Act (FOI) and analysed by the Parliament Street Think Tank, observing departmental IT spend and infrastructure allocation between August 2022 and July 2025.