Form

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

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

Documents

Details

This form should be used to register a UK establishment of an overseas company.

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

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

Nationalities and countries

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

Published 3 May 2010
Last updated 21 October 2021 + show all updates
  1. Added guidance on how to complete your OS IN01.

  2. Form updated following end of Brexit transition.

  3. Guidance added for changes from 1 January 2021.

  4. Link added to nationalities and countries list.

  5. New version uploaded

  6. First published.