Guidance

Technical interface specifications for Companies House software

Technical specifications for developing software to send information to Companies House digitally.

• From: Companies House
• Published: 14 September 2023
• Last updated: 6 June 2024 — See all updates

Documents

Important information for software developers - read first

HTML

Important information for software developers - read first

ODT, 12.8 KB

This file is in an OpenDocument format

Companies House technical interface specification (TIS)

ODT, 154 KB

This file is in an OpenDocument format

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Companies House technical interface specification (TIS) for accounts

ODT, 90.5 KB

This file is in an OpenDocument format

This file may not be suitable for users of assistive technology.

Request an accessible format.

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Details

These documents give detailed technical specifications for our software filing service. Software filing allows users to send information to Companies House digitally.

You’ll need expertise in extensible markup language (XML) to develop software.

If you’re developing accounts software, you’ll also need expertise in inline extensible business reporting language (iXBRL).

If you’re developing more complex accounts packages, you’ll need to understand our zip functionality and how we use this in the Companies House software filing service.

If you’re a package accounts filer or developer, you must read and understand the file structure and the validation rules.

For questions about information in the TIS, contact us by email: [email protected]

Published 14 September 2023
Last updated 6 June 2024 + show all updates

1. 6 June 2024

   TIS updated - version 5.3 published.

2. 16 April 2024

   TIS for accounts updated.

3. 28 November 2023

   Updated version of TIS for accounts.

4. 14 September 2023

   First published.