Enterprise Customer Relationship Management

Government Transformation and Service Delivery

Record date: 31 March 2026

Whole-life cost: £480.9m
Published schedule: 29/07/2022 – 31/05/2030
NISTA delivery confidence: Not disclosed
Senior responsible owner: Sarah McMann, Paul Williams

What the project is for

Enterprise Tax Management Platform Regeneration is a multi-year programme, established to modernise and protect the backbone of the HMRC tax accounting and payment capability. It will exploit new technology to enable better performance, improved user experience and innovation of our business processes to reduce cost and increase compliance revenue.

Departmental delivery commentary

The Programme Delivery Confidence Assessment remains Amber, with an improving trajectory and outlook as the Programme's commercial strategy implementation reaches conclusion. In December 25, the Programme awarded a contract to SAP for the provision of Enterprise Tax Management Platform (ETMP) software for the next 10-15 years and the Programme remains on track to appoint a Migration Delivery Partner in May 26. Migration enablement risk remains, centring around transforming the ETMP Application Programme Interface (API) landscape, how the applications interact with each other and reducing the size of the current platform. A Benefits Realisation plan alongside a business change strategy for the programme is maturing alongside identification of opportunities to reduce the delivery costs and will be presented in the next iteration of the Programme Business Case.

Schedule

Compared to financial year 24/25-Q4 the project's end date at 25/26 has increased to 31/05/2030 due to delivery of 12 months Hypercare which is a period of heightened support following go-live.

Cost

Compared to the 2024/25 financial year, the departmentally agreed Whole Life Costs range, approved by TAP (Treasury Approval Point) in November 2025, is £453m - £537m. The increase in costs is primarily driven by an increase in SAP contract duration (from 8-10 years) and a more mature understanding of the scope being delivered across SAP, HMRC and the future Migration Delivery Partner.

Benefits

The previous version of Programme Business Case, approved in May 2024, was based upon an 8-year contract duration, projected whole life costs of £444m. We are reporting benefits of £47m but anticipate these will increase over time to £116m. The key benefit of this Programme is protecting this vital piece of critical national infrastructure which secures over £800bn of tax per year of tax.