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1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minuteHM Revenue & Customs (HMRC) replaced an AWS agreement worth about £40m with a 36-month public-cloud contract reported at £94m, starting in April 2021. The change let HMRC use discounted AWS pricing under the One Government Value Arrangement (OGVA), but the figure was a contract value—not proof that £94m was ultimately spent or that HMRC realised £94m of savings. In 2026, AWS won a separate, roughly £394m-before-VAT data-centre-exit award (about £473m including VAT), making supplier concentration and switching costs a larger strategic question.
What HMRC signed in 2021
Computer Weekly reported on 8 April 2021 that HMRC cancelled and replaced an existing AWS cloud agreement. The predecessor was valued at approximately £40m. The replacement was a three-year (36-month) call-off contract beginning at the start of April 2021, with a reported value of £94m and an approximate minimum AWS spend of £29m a year.
The contract was procured through the G-Cloud 12 framework and covered AWS public-cloud services. It was not a single application purchase or a one-off migration project.
| Element | What was reported | How to read it |
|---|---|---|
| Previous AWS agreement | About £40m | Reported value of the contract HMRC replaced |
| New term | 36 months | Started in April 2021 |
| New reported value | £94m | Contract value; not evidence of actual cash expenditure |
| Minimum commitment | About £29m per year | Approximate annual floor reported at the time |
| Procurement route | G-Cloud 12 | Framework used for the call-off |
The available reporting does not establish the contract’s detailed payment schedule, termination costs, realised savings or final out-turn spend. A minimum commitment is also different from a forecast, maximum value or amount already invoiced.
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Why replace a signed agreement?
The original AWS deal predated OGVA. Introduced in November 2020, OGVA was a government-wide pricing arrangement in which AWS treated UK government and public-sector demand more like one large customer. HMRC said replacing its earlier contract would give it access to discounted AWS services that were not available under the old terms.
G-Cloud 12 and OGVA performed different jobs:
- G-Cloud 12: the procurement framework used to buy the services.
- OGVA: the pricing and value arrangement that enabled government-wide AWS discounts.
A higher headline value can therefore coexist with a lower unit price for comparable usage. The meaningful comparison would require HMRC’s expected consumption, service mix, discount rates, minimum commitments and rights to vary or terminate the call-off. Those details are not established in the 2021 report, so “cost saving” should mean access to discounted rates—not proven savings on the total bill.
What HMRC said public cloud would deliver
HMRC presented public cloud as part of its digital-transformation and cloud-first strategy. It said cloud would help the department build and run more resilient services, update systems more easily and scale capacity quickly during demand peaks. These were HMRC’s stated objectives, not independently verified performance results.
The strategy addressed pressure from a large, ageing estate and criticism that too much money was being spent maintaining legacy systems rather than modernising them. HMRC said it wanted to become one of the world’s most digitally advanced tax administrations. Computer Weekly, citing TechMarketView, reported that AWS was HMRC’s largest UK public-sector cloud supplier in 2020, with £42.7m of spend; that is an analyst-attributed figure, not an HMRC-published total in the cited coverage.
What the £94m announcement did—and did not—prove
It did establish
- HMRC had replaced a specific AWS agreement worth about £40m.
- The replacement ran for 36 months from April 2021.
- The reported contract value was £94m, with an approximate £29m annual minimum.
- OGVA pricing was the stated reason for restructuring the purchase.
It did not establish
- That HMRC spent the full £94m.
- That the department saved a quantified amount.
- Which workloads or applications were covered in detail.
- That all HMRC systems moved to AWS or that on-premise infrastructure ended.
- That the arrangement was multi-cloud or that AWS was selected as the cheapest bidder.
Cloud costs depend on compute, storage, databases, networking, support, licences, data transfer and usage patterns. A procurement review should separate the contractual ceiling or estimate, the minimum commitment, consumption forecasts and actual invoices.
What happened next: HMRC’s data-centre-exit award
The 2021 call-off was not HMRC’s last major AWS commitment. HMRC later procured a programme to exit three managed or Fujitsu-hosted data centres and move in-scope services to a hyperscaler environment. The planned scope included legacy operating systems, storage environments and virtualisation technologies.
Rank #3
Computer Weekly reported in March 2026 that AWS was the successful supplier under a 10-year award. The reported value was approximately £394m excluding VAT, or about £473m including VAT. A procurement record gives the ex-VAT figure as about £394m: Bidstats. The official award notice is Find a Tender notice 026139-2026.
| Figure | Meaning |
|---|---|
| About £394m | Reported later award value excluding VAT |
| About £473m | Approximate VAT-inclusive equivalent reported for the 10-year award |
| Up to £416.7m ex VAT / £500m inc VAT | Earlier planning estimate, not the final award value |
| 10 years | Duration associated with the data-centre-exit programme |
These amounts relate to a later, distinct data-centre-exit and hyperscaler-services procurement. They are not an update to, or evidence of spending under, the 2021 £94m call-off. Reporting said AWS was the only bidder remaining by award. HMRC’s move to public cloud also does not mean every workload has moved to AWS.
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Critics quoted by Computer Weekly questioned the “hyperscaler only” framing and the lack of competition in the later procurement. Those are criticisms, not findings that a court or regulator has ruled the procurement unlawful.
- Negotiating leverage: a sole remaining bidder gives the buyer less competitive pressure on price and terms.
- Portability: systems built around proprietary AWS services can require costly redesign to leave.
- Minimum-spend exposure: a £29m annual floor could create under-utilisation risk if demand falls.
- Long-term concentration: a decade-long arrangement may exchange data-centre dependence for hyperscaler dependence.
- Growing scope: cloud consumption, extensions and service adoption can increase value after the original award.
- Transition cost: cancelling and replacing the £40m agreement required commercial and technical transition work whose cost is not stated in the available reporting.
A public-cloud contract is not automatically a multi-cloud strategy. Buyers need explicit exit assistance, data-export rights, open interfaces, portable architectures, modular workloads and tested recovery options if they want credible switching capability.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.The UK cloud-market context in 2026
The Competition and Markets Authority’s cloud investigation identified data-egress fees, interoperability barriers and difficulty switching providers as obstacles to multi-cloud deployment. On 31 March 2026, the CMA said Amazon and Microsoft had committed to actions on egress fees and interoperability, while warning that more work was needed to help customers multi-home and switch. See the CMA announcement.
That context matters to HMRC’s economics: an OGVA discount can improve near-term unit prices while a concentrated, AWS-native estate may increase future migration and resilience costs.
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Best Value
A separate HM Treasury announcement designated AWS, Microsoft, Google Cloud and Oracle as Critical Third Parties to the UK financial sector from 13 July 2026. The designation gives financial regulators oversight of systemic services supplied to that sector; it does not directly regulate HMRC’s AWS operations and was not caused by HMRC’s contract. The scope is explained by HM Treasury.
How to assess the deal as a taxpayer or procurement professional
- Separate the numbers. Label each figure as contract value, minimum commitment, estimate, ex-VAT award or VAT-inclusive amount.
- Request actuals. Compare invoices and consumption with the £29m annual minimum and the £94m reported value.
- Test the discount. Compare OGVA rates with the predecessor contract for the same services and usage profile.
- Price exit. Model data-egress, re-engineering, skills, parallel running and transition-assistance costs.
- Check resilience. Identify workloads that can run elsewhere and test recovery without AWS-specific dependencies.
- Review competition. Record how many bids were received, why alternatives withdrew and how HMRC protected value with one bidder.
Bottom line
HMRC’s 2021 £94m AWS deal was a repricing and expansion of an existing cloud relationship, not proof of £94m in spending or realised savings. OGVA supplied the government-wide discount mechanism, while G-Cloud 12 supplied the procurement route. The later, separate AWS data-centre-exit award—about £394m excluding VAT over 10 years—makes the central issue broader than the original price: whether discounted cloud access and faster modernisation outweigh the competition, portability and long-term supplier-dependence risks of concentrating critical workloads with one hyperscaler.
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