Executive Summary
A UK establishment is a place of business or branch through which an overseas company operates in the United Kingdom. It allows a foreign company to conduct business in the UK without necessarily incorporating a separate UK limited company.
However, not every foreign company selling to UK customers needs to register a UK establishment. The requirement generally arises when the company establishes a physical place of business in the UK or usually carries on business from somewhere in the country.
Foreign companies must also distinguish between registering a UK establishment with Companies House and creating a taxable presence under UK tax law. These are separate considerations, and the relevant tests do not always produce the same outcome.
This guide explains when registration is required, how to register, the ongoing compliance obligations, and the circumstances in which a UK subsidiary may be more appropriate.
1. What Is a UK Establishment?
A UK establishment is a place of business or branch of a company incorporated outside the UK. It is a way for an overseas company to establish an operating presence in the UK while remaining the same legal entity as its foreign parent.
For example, an Israeli technology company might open a London office to manage UK sales, support customers and develop relationships with local businesses. If that office constitutes a UK establishment, the overseas company will generally need to register it with Companies House.
A UK establishment is not a separate legal entity. The foreign company remains responsible for the branch’s activities, contractual obligations and liabilities.
Common examples of a UK establishment
Depending on the circumstances, an establishment may include:
- A permanent UK office used to conduct the company’s business.
- A branch that manages sales, operations or other commercial activities.
- A UK location from which the foreign company regularly carries out its business.
- A physical business presence through which the overseas company operates in the UK.
The precise position depends on the company’s arrangements and activities. Having UK customers, by itself, does not automatically mean that a company has a registrable UK establishment.
Companies House provides guidance on the registration requirements for overseas companies: Register as an overseas company.
2. When Does a Foreign Company Need to Register a UK Establishment?
A foreign company generally needs to register with Companies House when it opens a place of business in the UK or usually carries on business from somewhere in the UK.
The assessment should focus on the company’s actual operating arrangements rather than simply where its customers are located.
Situations that may require registration
| Business activity | Is registration required? |
| The company opens a permanent UK office to conduct its business. | Generally, yes. |
| The company establishes a UK branch to manage its commercial activities. | Generally, yes. |
| The company sells to UK customers entirely from overseas, with no UK place of business. | Not necessarily. |
| A director occasionally works from a UK hotel during business trips. | Generally, no, on that fact alone. |
| The company uses an independent agent in the UK. | Not automatically; the specific arrangements matter. |
| The company has UK employees or contractors working remotely. | Requires an assessment of the actual circumstances; the arrangement does not automatically determine the outcome. |
Important: The absence of a Companies House registration requirement does not automatically mean that the company has no UK tax obligations. A foreign company may have tax, VAT or employment-related responsibilities even when it does not have to register a UK establishment.
What if the company has no UK office?
A foreign company may be able to serve UK customers without establishing a registrable UK place of business. For example, an overseas software company might provide services remotely from its home country.
However, the company should assess whether its UK activities create other obligations. Depending on its circumstances, it may need to consider:
- UK Corporation Tax.
- UK VAT registration and reporting.
- UK payroll and employment taxes.
- UK permanent establishment rules.
- UK property-related tax obligations.
The correct treatment depends on the nature of the business, its operating arrangements and the applicable tax rules.
3. UK Establishment vs Permanent Establishment: What Is the Difference?
One of the most important distinctions for foreign companies is the difference between a UK establishment under company law and a permanent establishment for tax purposes.
The terms sound similar, but they serve different purposes.
A UK establishment is primarily a Companies House registration concept. A permanent establishment is a tax concept used to determine whether a foreign company has a taxable business presence in the UK.
| Area | UK establishment | Permanent establishment |
| Main purpose | Company registration and disclosure. | Determining whether a foreign company has a taxable presence. |
| Relevant authority | Companies House. | HMRC and, where applicable, the relevant tax treaty. |
| Key consideration | Whether the company has a qualifying UK place of business or usually carries on business from the UK. | Whether the company meets the applicable domestic tax and treaty tests. |
| Tax consequences | Registration alone does not determine the company’s tax liability. | May bring profits attributable to the UK permanent establishment within UK Corporation Tax. |
| Can one exist without the other? | Yes, depending on the circumstances. | Yes, depending on the circumstances. |
What creates a UK permanent establishment?
Under UK domestic tax rules, a permanent establishment can arise through a fixed place of business or certain dependent-agent arrangements. Whether the conditions are met depends on the specific facts and any applicable double taxation agreement.
For example, a foreign company may have a UK office through which it conducts business. This could require Companies House registration and also create a UK permanent establishment for tax purposes.
Conversely, a company might have no registrable UK establishment but still need to consider whether its activities or representatives create a taxable presence under the relevant rules.
Foreign companies should not assume that registering a branch automatically determines their Corporation Tax obligations, or that avoiding Companies House registration removes their UK tax exposure.
HMRC’s guidance explains when a non-UK incorporated company must register for Corporation Tax: Corporation Tax for non-UK incorporated companies.
4. How to Register a UK Establishment
When registration is required, the overseas company must submit the relevant documents to Companies House.
Step 1: Confirm that registration is required
Review the company’s UK activities, physical presence, management arrangements and operating model.
Determine whether the business is opening a registrable UK establishment or whether another structure, such as a UK subsidiary, would be more appropriate.
Step 2: Complete Form OS IN01
The company generally registers its UK establishment using Form OS IN01.
The form requests information about the overseas company, its UK establishment and the individuals authorised to represent it.
The company must submit the registration documents within one month of opening the UK establishment.
Step 3: Prepare the supporting documents
The documents generally required include:
- A certified copy of the company’s constitutional documents.
- A certified English translation of documents that are not in English.
- A copy of the company’s latest accounts, where required under the applicable rules.
- Information about the overseas company and its UK establishment.
- The required identity verification details for the company’s directors.
The precise documentation requirements depend on the company’s circumstances and the accounting and disclosure requirements in its country of incorporation.
Step 4: Submit the application
Submit Form OS IN01 and the required supporting documents to Companies House.
The application should be checked carefully to ensure that the company’s details are accurate and that the required documents have been provided.
For the current process and supporting documentation, consult the official Companies House registration guidance.
Step 5: Review the company’s tax position
Companies House registration and tax registration are separate matters.
The company should assess whether it needs to register for UK Corporation Tax and whether VAT, PAYE or other obligations arise from its UK activities.
The relevant tax requirements should be established from the actual business arrangements rather than assumed from the company’s legal structure alone.
5. What Ongoing Compliance Obligations Apply?
Registering a UK establishment creates ongoing filing and disclosure responsibilities.
The foreign company should establish procedures to ensure that Companies House records remain accurate and that applicable UK tax and accounting obligations are met.
Companies House obligations
Depending on the circumstances, the company may need to:
- Notify Companies House of changes to registered company details.
- Keep information about directors and authorised representatives up to date.
- File the required accounts and other documents.
- Meet applicable identity verification and confirmation requirements.
- Comply with relevant business name and disclosure rules.
Companies House generally requires changes to specified company particulars to be reported within 14 days.
The exact filing requirements depend on the company’s circumstances, including its home-country accounting and disclosure obligations. Overseas companies should consult the official guidance for overseas companies registered in the UK.
Accounting and tax obligations
A UK establishment may also require the company to maintain appropriate accounting records for its UK operations and identify the profits attributable to its UK activities.
Depending on the facts, the company may need to consider:
- UK Corporation Tax registration and returns.
- Allocation of income and expenses between the UK operation and the overseas business.
- VAT registration, returns and invoicing requirements.
- Payroll registration and employment tax reporting.
- Transfer pricing where transactions take place between related entities.
- Record retention and supporting documentation.
The company should not assume that all the overseas parent’s profits are taxable in the UK simply because it has a UK branch. The tax treatment depends on the applicable rules, including the profits attributable to any UK permanent establishment and relevant treaty provisions.
6. UK Establishment or UK Subsidiary: Which Is Better?
Foreign companies expanding into the UK commonly consider two options: registering a branch of the overseas company or incorporating a separate UK subsidiary.
The right choice depends on the company’s commercial objectives, liability considerations, tax position and expected scale of operations.
| Consideration | UK establishment or branch | UK subsidiary |
| Legal identity | Part of the overseas company. | Separate legal entity. |
| Liability | The overseas company remains responsible for the branch’s obligations. | The subsidiary is generally responsible for its own obligations, subject to applicable law and any parent guarantees or other commitments. |
| Ownership | The overseas company operates directly in the UK. | The overseas company can own the subsidiary. |
| Reporting | Overseas company registration and applicable ongoing disclosure requirements. | UK company accounts, confirmation statement and other applicable filing requirements. |
| Tax treatment | UK tax may apply to profits attributable to a UK permanent establishment, subject to the relevant rules. | UK tax generally applies to the subsidiary’s taxable profits. |
| Commercial perception | May suit businesses extending an existing overseas operation. | May suit businesses seeking a distinct UK legal entity for customers, staff or investors. |
When a UK establishment may be suitable
A branch may be appropriate when the company wants to extend its existing business into the UK without creating a separate legal entity.
It can also suit businesses that prefer the UK operation to remain directly integrated with the overseas company.
However, the parent company must consider its direct exposure to the branch’s liabilities and the additional reporting requirements.
When a UK subsidiary may be preferable
A subsidiary may be more suitable when the company wants a distinct UK legal entity, plans to employ a local team, expects substantial UK operations or needs a structure that supports UK investment and commercial relationships.
A subsidiary also creates its own statutory accounting and filing responsibilities. It should therefore be selected based on the overall commercial and compliance position, rather than assuming it is always simpler or more tax-efficient.
7. Common Mistakes Foreign Companies Should Avoid
Foreign businesses can create unnecessary compliance risks by overlooking the distinction between their UK commercial presence and their legal and tax obligations.
Common mistakes include:
1. Assuming UK customers automatically require registration
Selling to UK customers does not, by itself, establish a requirement to register with Companies House. The company’s actual UK presence must be assessed.
2. Assuming no registration means no UK tax
A company may have UK tax obligations even if it does not have to register a UK establishment. Corporation Tax, VAT and other requirements should be considered separately.
3. Missing the registration deadline
Where registration is required, the company must generally file the relevant documents within one month of opening the establishment.
4. Overlooking ongoing filing requirements
Registration is not a one-off administrative task. The company should monitor changes to its details and ensure that applicable filing and disclosure requirements are met.
5. Failing to assess the branch’s taxable profits
The company should identify which profits are attributable to its UK activities and maintain appropriate supporting records.
6. Choosing a structure without considering liability
A branch is not legally separate from its overseas parent. Companies should assess the implications before committing to this structure.
8. Practical Checklist for Foreign Companies
Before opening or operating a UK establishment, foreign companies should work through the following checklist:
- Assess whether the planned UK activities create a registrable place of business.
- Compare a UK branch with a separate UK subsidiary.
- Confirm the registration requirements and prepare Form OS IN01 where required.
- Obtain the necessary constitutional documents and accounts.
- Arrange certified English translations where applicable.
- Complete the registration within the required deadline.
- Assess UK Corporation Tax and permanent establishment exposure.
- Review VAT and payroll obligations.
- Establish accounting records for the UK activities.
- Set up a process to monitor filing deadlines and changes to company details.
Early planning helps foreign companies avoid registration delays, missed tax obligations and unnecessary restructuring.
Frequently Asked Questions
1. Does every foreign company operating in the UK need to register a UK establishment?
No. Registration is generally required when a foreign company opens a qualifying place of business in the UK or usually carries on business from somewhere in the country. Selling to UK customers alone does not automatically trigger this requirement.
2. How long does a foreign company have to register a UK establishment?
The company must generally submit the required registration documents to Companies House within one month of opening the UK establishment.
3. Is a UK establishment the same as a UK branch?
A branch is a form of UK establishment. Both refer to an overseas company’s business presence in the UK rather than a separate UK-incorporated company.
4. Does a UK establishment automatically create a permanent establishment for tax purposes?
No. The Companies House registration test and the tax definition of a permanent establishment are different. The tax position must be assessed separately under UK domestic rules and any applicable double taxation agreement.
5. Does a UK establishment need to pay UK Corporation Tax?
A foreign company may be liable to UK Corporation Tax on profits attributable to a UK permanent establishment, subject to the applicable rules. The company’s specific tax position should be assessed based on its activities and circumstances.
6. Can a foreign company register a UK establishment without incorporating a UK subsidiary?
Yes. A foreign company can generally register a UK establishment without creating a separate UK company, provided it meets the relevant requirements. The overseas company remains legally responsible for the establishment.
7. Can a foreign company operate in the UK without a UK establishment?
Yes, in some circumstances. For example, a company may supply UK customers from overseas without maintaining a UK place of business. However, it should still assess whether its activities create UK tax, VAT or other compliance obligations.
Conclusion
A UK establishment can provide a practical route for a foreign company to expand into the UK while retaining its existing legal identity. However, the decision to register should follow a careful review of the company’s UK activities and operating arrangements.
Foreign companies should distinguish between Companies House registration and tax obligations, assess the implications of operating through a branch, and establish appropriate accounting and compliance procedures from the outset.
Choosing the right structure early can help businesses manage risk, meet their UK obligations and support sustainable growth.
To discuss your UK operations, book a meeting through our online calendar or contact us by email for a confidential consultation: David.levy@fkgb.co.uk
