The UK is one of the most attractive markets in the world for international businesses. Stable economy, globally respected legal system, English as the operating language, and a government that is genuinely open to foreign investment.
Getting in is the part people underestimate.
Not because it is complicated. It is actually quite manageable once you understand the options. The issue is that most people start researching new company formation in the UK and immediately hit a wall of terminology. Branch registration. UK establishment. Overseas entity. Private limited company. They all mean something different and choosing the wrong route creates problems that are annoying and expensive to fix later.
This guide cuts through that. Here is exactly what a foreign company needs to know before setting up in the UK.
Two Different Routes. Pick the Right One First.
This is the decision that shapes everything else. Foreign businesses entering the UK generally have two options.
Option 1: Register a UK Establishment (Branch)
If your company already exists in another country and you want to operate in the UK as an extension of that company, you register a UK establishment with Companies House. This is essentially a branch of your existing overseas business.
What that means in practice:
- Your overseas parent company remains the legal entity
- The UK establishment is not a separate legal person
- The parent company is fully liable for everything the UK branch does
- You do not get limited liability protection at the UK level
This route suits companies testing the UK market or wanting a formal UK presence without creating a separate entity.
Option 2: Incorporate a New UK Company
If you want a clean, separate UK legal entity with its own limited liability protection, you incorporate a new private limited company through Companies House. This is a brand new UK company that happens to be owned by foreign shareholders or directors.
What that means in practice:
- Completely separate legal entity from your overseas parent
- Limited liability protection for shareholders
- Treated as a UK company under UK law regardless of where the owners live
- More credibility with UK banks, suppliers, and clients
Most international founders building something long-term in the UK go with a private limited company. It is cleaner, better protected, and better understood by everyone you will deal with commercially.
The rest of this guide covers both routes because the requirements differ significantly.
Registering a UK Establishment: The Steps
If you are going the branch route, here is how it works.
You have one month. From the date you open a UK establishment, you have one month to register with Companies House. Miss that deadline and you are technically operating illegally. The clock starts when you begin conducting business from a UK location, not when you formally decide to register.
The form is OS IN01. This is the application form for registering an overseas company’s UK establishment. It captures everything Companies House needs to know about your business and the UK presence you are setting up.
What you need to submit with OS IN01:
- Full details of the overseas company including name, country of incorporation, registered address, and legal form
- A certified copy of your company’s constitutional documents, such as articles of association or equivalent. If these are not in English, a certified translation in English must accompany them
- A copy of your latest accounts if required under your parent country’s law, again with certified English translation if needed
- Details of all directors including names, service addresses, and nationality
- Details of any persons authorised to represent the company in the UK
- The UK establishment address. Must be a physical UK address
The registration fee is £124. Paid by cheque or postal order with the paper form submission.
Director identity verification. Under the Economic Crime and Corporate Transparency Act 2023, all directors of overseas companies registering a UK establishment must verify their identity with Companies House. For overseas directors, this means submitting Form OS VS01 for each director. This must be completed by the anniversary of the date the UK establishment was opened.
Incorporating a New UK Private Limited Company: The Steps
This route is more popular with international founders and arguably more straightforward despite what it sounds like.
No residency requirement. You do not need to live in the UK, be a UK citizen, or even have a UK bank account to incorporate a UK limited company. The entire process can be completed remotely and digitally.
What you need to register:
- Proposed company name: Checked against the Companies House register. Cannot be identical or confusingly similar to an existing name. Restricted words like “bank,” “royal,” and “government” need special approval
- Registered office address in the UK: Must be a physical UK address, not a P.O. box. This is where all official government correspondence goes. Virtual office addresses that meet Companies House requirements are accepted
- Director details: Full name, date of birth, nationality, residential address (kept private), and service address (publicly visible). No UK residency required. Directors must be 16 or older
- Shareholder details: Names, addresses, share allocation, and share class for every shareholder. Foreign shareholders are fully permitted
- Articles of Association: The internal rules governing the company. Standard model articles from Companies House work for most straightforward setups
- Memorandum of Association: Automatically generated when registering online
- Standard Industrial Classification (SIC) code: Describes what your business does
Identity verification for directors. From November 2025, every director must verify their identity before or at the time of incorporation. For overseas directors, this is done through an Authorised Corporate Service Provider if the online GOV.UK route is not accessible from their country. Build time into your process for this step.
The registration fee is £50 online. Processing typically completes within 24 hours for online applications.
Tax Registration After Incorporation
Whether you go branch or new company, tax registration comes next. Do not delay this.
Corporation Tax: Register with HMRC for Corporation Tax within three months of starting to do business. This happens automatically for newly incorporated companies but requires attention for branch registrations.
VAT: Mandatory once UK taxable turnover exceeds £90,000. Can be registered voluntarily below that threshold. For overseas companies supplying digital services to UK consumers, VAT may apply from the first pound of revenue regardless of the threshold.
PAYE: Required if you are hiring UK employees. Register with HMRC before your first payroll.
The UK has over 130 active double taxation treaties. If your home country is one of them, profits are generally protected from being taxed twice. Worth confirming your specific position with a UK tax adviser before you start trading.
The Register of Overseas Entities: An Extra Step If You Own UK Property
This one surprises a lot of foreign companies. It is separate from Companies House registration and it applies specifically to overseas entities that own, buy, sell, or lease UK land or property.
Since August 2022, any overseas entity owning UK property must register on the Register of Overseas Entities and disclose beneficial owners. This applies to property acquired in England and Wales since January 1999, Scotland since December 2014, and Northern Ireland since August 2022.
If your UK operation involves owning or acquiring property, this registration is not optional. Failing to comply restricts your ability to sell, lease, or charge that property and carries serious legal penalties.
Common Things That Slow People Down
A few patterns that come up regularly for foreign companies entering the UK:
- Underestimating the director identity verification timeline: Overseas directors using an ACSP for verification need to build in extra time. It does not happen overnight
- Using an address that does not meet Companies House standards: A P.O. box or an address that is not accessible during business hours will not pass. Confirm your registered address is compliant before submitting
- Submitting constitutional documents without certified English translations: Companies House will not accept foreign language documents without an accompanying certified English translation. Get these sorted before you file
- Missing the one-month window for branch registration: The clock starts when you begin operating in the UK, not when you decide to register. Track the date carefully
- Opening a UK bank account last: UK banking for overseas companies takes longer than most people expect. Start that process as early as possible, ideally in parallel with registration rather than after it
Branch or New Company. Which Is Better?
Depends entirely on what you are building.
Go with a UK establishment if you are testing the market, want to maintain a single global entity, or do not need separate UK legal identity. Understand that your parent company carries full liability for UK operations.
Go with a new UK private limited company if you want a clean separate entity, limited liability protection at the UK level, and the credibility that comes with being a fully incorporated UK company. Most international founders building for the long term choose this route.
At Aadmi, we help overseas businesses with new company formation in the UK, whether that is registering a UK establishment or incorporating a new private limited company. We handle the registration, compliance setup, registered office services, and everything that follows so nothing gets missed.
It also helps to explore UK company registration requirements, Companies House filing obligations, overseas company registration UK, private limited company formation, and UK business compliance before you begin.
FAQs
1. Does a foreign company have to register with Companies House if it operates in the UK?
Yes, if it has a physical UK establishment where business is conducted. Simply attending meetings or using independent agents does not trigger registration. But a regular place of business does, and you have one month from opening to register.
2. Can a foreign national own and direct a UK limited company?
Yes. There is no residency or citizenship requirement. Foreign shareholders and directors are fully permitted. All directors must complete identity verification under the November 2025 rules.
3. What is the difference between a UK establishment and a new UK company?
A UK establishment is a branch of your existing overseas company. It is not a separate legal entity and the parent remains liable for everything it does. A new UK company is a separate legal entity incorporated in the UK with its own limited liability protection.
4. How long does UK company formation take for overseas founders?
Online incorporation typically completes within 24 hours once all documents are submitted. Director identity verification for overseas founders can take longer depending on the route used. Factor in extra time for this step.
5. What happens if a foreign company misses the one-month registration deadline for a UK establishment?
Operating a UK establishment without registering with Companies House is a legal offence. Every officer of the company can be held personally liable for the failure. Register as soon as you realise the deadline has been missed and seek advice on how to handle the late filing.
