---
title: "CAS Proxy Migration"
ocid: "ocds-b5fd17-282a2ad6-cc59-4b4d-b746-de4e7e4da8e9"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-b5fd17-282a2ad6-cc59-4b4d-b746-de4e7e4da8e9"
markdown_url: "https://d3tenders.com/contract/ocds-b5fd17-282a2ad6-cc59-4b4d-b746-de4e7e4da8e9.md"
json_url: "https://d3tenders.com/contract/ocds-b5fd17-282a2ad6-cc59-4b4d-b746-de4e7e4da8e9.json"
source: "Contracts Finder"
current_stage: "Award"
buyer: "H M REVENUE & CUSTOMS"
published: "2026-04-30"
---

# CAS Proxy Migration

Buyer: H M REVENUE & CUSTOMS  
Current stage: Award  
OCID: ocds-b5fd17-282a2ad6-cc59-4b4d-b746-de4e7e4da8e9

[View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-b5fd17-282a2ad6-cc59-4b4d-b746-de4e7e4da8e9)  
[Download OCDS JSON](https://d3tenders.com/contract/ocds-b5fd17-282a2ad6-cc59-4b4d-b746-de4e7e4da8e9.json)

## Summary

The procurement process for the "CAS Proxy Migration" project initiated by H M Revenue & Customs (HMRC) involves migrating legacy data infrastructure to the cloud. This process falls under the IT services industry category, specifically focusing on consulting, software development, internet, and support services. Located in the United Kingdom, HMRC utilised a selective procurement method via a call-off from the G-Cloud 14 framework agreement. Key dates include the tender period end date on 1st March 2026, and the contract period spans from 1st April 2026 to 31st March 2027. The procurement has reached the award stage, with a contract value of £3,000,000, reflecting active engagement in the process.

This tender presents significant opportunities for businesses specialising in IT services, particularly those equipped to handle complex data migration challenges. Small and medium-sized enterprises (SMEs) with expertise in cloud solutions and IT consultancy can leverage this opportunity to collaborate with a major government organisation like HMRC. The project highlights the potential for business growth through the provision of specialised services within the established framework, reflecting a conducive environment for businesses seeking expansion in the public sector domain.

## Notice

This contract is to provide specific and in depth support to HMRC enabling data migration from legacy data infrastructure to the cloud. This is a call off contract from G-Cloud 14 (RM1557.14)

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Contracts Finder |
| Latest notice | https://www.contractsfinder.service.gov.uk/Notice/ccb82b52-7f54-4526-b424-a356e303d82d |
| Notice type | Award Notice |
| Procurement type | Framework |
| Procurement category | Services |
| Procurement method | Selective |
| Procurement method details | Call-off from a framework agreement |
| Tender suitability | SME |
| Awardee scale | SME |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 30 Apr 2026 |
| Submission deadline | 1 Mar 2026 |
| Future notice date | Not specified |
| Award date | 31 Mar 2026 |
| Contract period | 31 Mar 2026 - 31 Mar 2027 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £3,000,000 |
| Lots value | Not specified |
| Awards value | £3,000,000 |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Not specified |
| Awards status | Active |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | H M REVENUE & CUSTOMS |
| Locality | LONDON |
| Post town | Southend-on-Sea |
| Postcode | SS99 1AA |
| Country | England |
| ITL 1 | TLH East (England) |
| ITL 2 | TLH3 Essex |
| ITL 3 | TLH31 Southend-on-Sea |
| Local authority | Southend-on-Sea |
| Electoral ward | Victoria |
| Westminster constituency | Southend East and Rochford |
| Delivery location | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | POSTERITY MILESTONE CONSORTIUM |

## CPV Codes

### Divisions

- 72 - IT services: consulting, software development, Internet and support

### Codes

- 72000000 - IT services: consulting, software development, Internet and support

## Release History

- 30 Apr 2026 at 15:13 - Award - Award Notice - https://www.contractsfinder.service.gov.uk/Notice/ccb82b52-7f54-4526-b424-a356e303d82d

## Documents

- https://www.contractsfinder.service.gov.uk/Notice/ccb82b52-7f54-4526-b424-a356e303d82d
  30th April 2026 - Awarded contract notice on Contracts Finder

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-b5fd17-282a2ad6-cc59-4b4d-b746-de4e7e4da8e9. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-b5fd17-282a2ad6-cc59-4b4d-b746-de4e7e4da8e9.json.