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Form

Register a UK establishment of an overseas company (OS IN01)

Use this form to register a UK establishment of an overseas company.

Updates to this page

From:
Companies House
Published:
3 May 2010
Last updated:
16 February 2026
Show all updates

  1. Updated fee to register a UK establishment of an overseas company.

  2. Fee updated.

  3. Updated in line with changes to company registers and the launch of mandatory identity verification.

  4. Fee updated.

  5. Added guidance on how to complete your OS IN01.

  6. Form updated following end of Brexit transition.

  7. Guidance added for changes from 1 January 2021.

  8. Link added to nationalities and countries list.

  9. New version uploaded

  10. First published.

Documents

How to complete your OS IN01

HTML

OS IN01 registration of an overseas company opening a UK establishment

PDF, 627 KB, 16 pages

OS IN01 continuation pages (optional)

ZIP, 366 KB

Details

Read how to complete form OS IN01 before you submit your form.

It costs £124 to register a UK establishment of an overseas company.

For more information on overseas companies, read our overseas companies guidance.

Before you register

All directors will need to verify their identity to prove who they are. You’ll need to give the Companies House personal code for each director and confirm they have verified their identity.

See Verifying your identity for Companies House.

Nationalities and countries

Use our list of nationalities and countries to complete your form. We’ll only accept entries from this standard list.

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