---
title: "XBRL Validations Module"
ocid: "ocds-h6vhtk-06e2da"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-06e2da"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-06e2da.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-06e2da.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "HM Revenue & Customs"
published: "2026-08-14"
---

# XBRL Validations Module

Buyer: HM Revenue & Customs  
Current stage: Award  
OCID: ocds-h6vhtk-06e2da

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## Summary

HM Revenue & Customs procured an XBRL validation module as an IT service for Corporation Tax computations. The service is intended to improve the quality of submitted data, support compliance risk profiling and validate newly mandated tax computation formats. The validation engine provides feedback to customers, tax agents and software providers before submissions are made. The work covers the technical capability and modifications needed to support this validation function, with delivery in the United Kingdom. The procurement is a central government requirement from HMRC, relevant to suppliers providing tax technology, XBRL software, validation engines, software development, technical consultancy or related IT support. The requirement was structured as one lot and was considered suitable for small and medium-sized enterprises.

The procurement has reached the award stage, with CoreFiling Limited selected under a direct award procedure. HMRC stated that CoreFiling was the only supplier with the proven capability and technical expertise required to make the necessary modifications. The award date was 14 August 2026. The awarded value is £705,000 excluding VAT, or £846,000 including VAT. The award period runs from 1 September 2026 to 31 December 2026. A contract signature was scheduled for 1 September 2026, and the standstill period ended on 25 August 2026. The procurement was above the relevant threshold and was evaluated through the direct-award justification based on exclusive technical capability and expertise. The award covers the single XBRL validation module lot; no separate lot awards were made.

This outcome demonstrates demand for specialist tax-compliance technology that can validate XBRL-based Corporation Tax computations before submission. A credible competitor for a future requirement from HMRC would need demonstrable expertise in XBRL validation, tax computation formats and the integration of validation tools into public-facing submission processes. It would also need to show that its software can provide clear, timely feedback to customers, agents and software providers, while improving data quality and supporting compliance risk analysis. Relevant strengths include proven software development and modification capability, technical consultancy, secure operation of services handling tax-related information, and experience delivering dependable validation or rules-engine technology for government or regulated users. The requirement was treated as suitable for an SME, indicating that specialist smaller technology firms may be able to compete where they can evidence comparable capability and delivery experience.

## Notice

XBRL validation capability used for Corporation Tax computations. The objective is to improve data quality, support compliance risk profiling, and enable validation of newly mandated tax computation formats. The validation engine provides feedback to customers, agents and software providers before submission.

### Procurement Information

HMRC identified CoreFiling as the only supplier with the proven capability and technical expertise necessary to deliver the required modifications

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/077785-2026 |
| Notice type | UK6 - Contract Award Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Direct |
| Procurement method details | Direct award |
| Tender suitability | SME |
| Awardee scale | SME |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 14 Aug 2026 |
| Submission deadline | Not specified |
| Future notice date | Not specified |
| Award date | 12 Aug 2026 |
| Contract period | 1 Sep 2026 - 31 Dec 2026 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | £705,000 |
| Contracts value | Not specified |

## Status

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

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | HM Revenue & Customs |
| Locality | LONDON |
| Postcode area | South West London |
| Postcode | SW1A 2BQ |
| Country | England |
| ITL 1 | TLI London |
| ITL 2 | TLI3 Inner London - West |
| ITL 3 | TLI35 Westminster and City of London |
| Local authority | Westminster |
| Electoral ward | St James's |
| Westminster constituency | Cities of London and Westminster |
| Delivery location | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | COREFILING LIMITED |

## CPV Codes

### Divisions

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

### Codes

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

## Release History

- 14 Aug 2026 at 15:26 - Award - UK6 - Contract Award Notice - https://www.find-tender.service.gov.uk/Notice/077785-2026
- 12 Aug 2026 at 15:16 - Award - UK5 - Transparency Notice - https://www.find-tender.service.gov.uk/Notice/076881-2026

## Documents

- https://www.find-tender.service.gov.uk/Notice/077785-2026
  14th August 2026 - Contract award notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/076881-2026
  12th August 2026 - Transparency notice on Find a Tender

## Notice URLs

- http://corefiling.com
- https://www.legislation.gov.uk/ukpga/2023/54/contents

## 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-h6vhtk-06e2da. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-06e2da.json.