£37M SAP overhaul could extend Capgemini’s run with UK tax collector to 28 years
HM Revenue & Customs has awarded Capgemini a £37 million contract to migrate its Enterprise Tax Management Platform (ETMP) from the legacy SAP ECC 6.0 system to SAP's S/4HANA platform. The deal, running until 2032, could extend Capgemini's relationship with the UK tax authority to 28 years, dating back to when it became HMRC's lead technology supplier in 2004 under the Aspire contract. HMRC has stressed that the procurement process was fair and competitive, amid scrutiny over the firm's long-standing dominance as a supplier.
ETMP handles more than £800 billion in tax revenue and payments annually for around 40,000 users, covering returns processing, tax accounting and data management. Bidders for the new contract came from the Digital & Legacy Application Services framework, which also includes Accenture, Atos, CGI, Cognizant and IBM, with ethical walls put in place to prevent conflicts of interest. Capgemini has secured a string of related HMRC deals in recent years, including a £51 million ETMP contract in 2022, a five-year agreement worth up to £574 million in 2024, and a Contact Centre as a Service deal worth up to £600 million; separately, HMRC awarded SAP a £275 million uncompeted contract in January for S/4HANA sovereign cloud capability.
- HMRC gives Capgemini £37M deal to migrate tax system to SAP S/4HANA
- Contract could extend Capgemini's HMRC ties to 28 years, since 2004
- ETMP handles over £800bn in UK tax revenue annually for 40,000 users
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HM Revenue & Customs (HMRC) collects taxes and manages payments for the UK government. Its Enterprise Tax Management Platform is a major computer system used to process tax returns, keep accounts and manage data; it handles more than £800 billion in tax revenue and payments each year.
Capgemini became HMRC’s lead technology supplier in 2004 under a contract known as Aspire. The relationship has continued through later contracts, while other large technology firms have also been eligible to bid for HMRC work.
The platform currently runs on an older version of SAP software, and the planned move is to SAP’s newer S/4HANA system. The change matters because the platform supports tax operations used by about 40,000 people, and its reliability is important to the collection and administration of public revenue.
Both sides, in good faith
The strongest fair case each way — we don't pick a winner.
The case for
HMRC procured this contract through a fair and competitive framework incorporating multiple qualified suppliers, with safeguards against conflicts of interest. Given ETMP's critical role in managing over £800 billion in annual tax transactions for 40,000 users, selecting an experienced incumbent with proven operational knowledge reduces implementation risk and ensures continuity for mission-critical infrastructure.
The case against
This award extends Capgemini's dominance across a string of recent HMRC contracts worth £51 million, £574 million, and £600 million combined, raising legitimate questions about genuine competition and vendor lock-in. Whilst the procurement framework permits competition, Capgemini's pre-existing institutional knowledge and established relationships likely confer insurmountable advantages that undermine fair competition, and prolonged dependence on a single supplier for critical government systems limits innovation and value for taxpayers.