GOV.UK One Login

Government Transformation and Service Delivery

Record date: 31 March 2026

Whole-life cost: £708.9m
Published schedule: 04/01/2021 – 31/03/2028
NISTA delivery confidence: AMBER
Senior responsible owner: Natalie Jones

What the project is for

GOV.UK One Login is being developed as the single sign-on and identity verification front door for accessing government services. This will replace up to 300 individual accounts, accessed via 44 different sign-in methods; and will provide a significantly improved user experience. Our aim is to make it as simple, inclusive, and secure as possible for individuals to prove their identity and access connected services, while protecting them and the government from the risks of fraud.

Departmental delivery commentary

Compared to financial year 24/25 Q4, the NISTA/SRO Delivery Confidence Assessment (DCA) rating at 25/26 Q4 remained at Amber. This is primarily due to the following factors that‚ GOV.UK One Login is continuing to scale, with over 200 services already onboarded, for example apply for a Disclosure and Barring Service (DBS) check, and sign a mortgage deed .Over time, all central government services will be accessible through GOV.UK One Login. Over 15 million people have proven who they are through One Login, and its identity verification app - which has a rating of 4.6* on Android and iOS stores respectively - has been downloaded more than 16 million times.

Schedule

Compared to financial year 24/25-Q4, the project's end-date at 25/26-Q4 remained the same which is 31st March 28 which covers the length of the approved Full Business Case which is running from 25/26 to 27/28 and has been approved by HM Treasury.

Cost

Compared to financial year 24/25-Q4, the project's departmentally agreed Whole Life Cost at 25/26-Q4 (measured in £m) increased due to a successful new Full Business Case being approved at DSIT Investment Committee and HM Treasury Approvals Panel which provided GDS with the funding to continue the programme for another 3 financial years.

Benefits

Compared to financial year 24/25-Q4, the project's departmentally agreed benefits at 25/26-Q4 (measured in £m) increased due to the continuation of One Login as a funded programme. Its projected benefits were scrutinised by HM Treasury and will far outweigh financial investment into the programme.