Branch office vs. Branch registration in the UK

What Is a UK Branch

A UK branch, in the formal legal sense, is a registered extension of an overseas parent company. It isn’t a separate legal entity in its own right. Instead, it operates as an arm of the parent, which means the parent company remains directly liable for everything the branch does, including its debts and contracts.

Some people call this an “Overseas Company” registration, since that’s the term Companies House uses. Others simply say “branch office” because that’s the everyday phrase for any physical UK presence. Both are talking about the same underlying idea, but only one of them, branch registration, is a formal, filed legal status. We cover the full picture on our set up a UK branch (link to: https://www.paulbeare.com/set-up-a-uk-branch/) page.

Branch Office vs Branch Registration

“Branch office” is a descriptive term. It can mean a UK sales office, a small operational team, a registered branch, or even a representative office with no trading activity at all. On its own, it tells you nothing about the legal status of that presence.

“Branch registration” is specific. It refers to formally registering your overseas company at Companies House as having a UK establishment. Once registered, you’re required to file certain information publicly, including details about the parent company and, in most cases, the parent’s own annual accounts.

This distinction also matters when comparing a branch to a subsidiary. A subsidiary is a separate UK-incorporated company, with its own legal identity, its own liability, and its own filing obligations that don’t extend to the parent’s accounts. A branch carries the parent company’s name, liability, and financial disclosure into the UK. For a full comparison of the options, see our branch vs subsidiary vs representative office https://www.paulbeare.com/branch-vs-subsidiary-vs-representative-office/ guide.

Why It Matters for Overseas Companies

Getting this distinction wrong at the planning stage is one of the more common causes of delay for overseas companies expanding into the UK. If you tell your advisers you want a “branch office” without clarifying what you mean, you could end up being set up with the wrong structure for how you actually intend to trade.

The choice also affects what the UK market sees. A branch registration puts your parent company’s financial information on public record in the UK. For some businesses that’s a non-issue. For others, particularly those who prefer a lower public profile for the parent entity, a subsidiary is the better fit precisely because it keeps that separation intact.

There’s also a practical angle. A branch is generally quicker and cheaper to wind down than a subsidiary, which makes it a common choice for companies testing UK demand before committing to a fuller presence. If you’re still exploring whether to enter the UK market at all, our setting up in the UK https://www.paulbeare.com/setting-up-in-uk overview is a useful starting point.

How It Works in the UK

To register a UK branch, an overseas company applies to Companies House as an “Overseas Company” establishing a UK presence, using form OS IN01. This must be filed within one month of the UK establishment opening, along with a filing fee of £124.

Alongside the form, you’ll need a certified copy of the parent company’s constitutional documents, translated into English if the original isn’t in English, and a copy of its latest accounts if the parent is required to prepare and disclose accounts under its home country’s law. You’ll also need to appoint someone authorised to accept service of documents in the UK.

Once registered, the branch appears on the Companies House public register under the parent company’s name, with an overseas company designation rather than a standard UK company number. This is different from setting up a fully incorporated subsidiary through UK company formation  https://www.paulbeare.com/uk-company-formation/, where the new entity gets its own company number and constitution from day one.

Key Compliance Requirements

Once a branch is registered, ongoing compliance centres on keeping Companies House informed. Any change to the UK establishment, such as its address or nature of business, must be notified within 21 days, using form OS CH01. Changes at parent company level, such as a change of directors or constitution, must be notified within 21 days of when the notice could reasonably have reached the UK by post, using form OS CH02.

Accounts filing depends on whether the parent company must prepare and disclose accounts under its home country’s law. If it does, those accounts must be filed with Companies House within three months of when they’re required to be disclosed at home, using form OS AA01. If it doesn’t, the branch must still prepare and file its own accounts, on a schedule Companies House sets when the establishment is registered.

The most significant recent change is identity verification. Since November 2025, every director of an overseas company with a UK establishment must verify their identity with Companies House, regardless of nationality or residence. This is confirmed by filing form OS VS01, and the deadline is the anniversary of the date the UK establishment opened. New directors appointed after registration must verify their identity before the appointment can be registered. This applies on top of the existing disclosure duty to display the company’s name and country of incorporation at every UK business location and on correspondence.

Tax registration remains a separate matter from company registration. A UK branch may still need to register for corporation tax and, depending on its activities, VAT, even though it isn’t a distinct UK legal entity.

Common Mistakes International Businesses Make

The most frequent mistake is treating “branch office” as a decision already made, rather than a term that needs unpacking. Companies often approach a UK adviser assuming a branch registration is the only option, when a subsidiary, or even a representative office with no trading activity, might suit their plans better.

Another common issue is underestimating the compliance link back to the parent company. Because branch registration ties UK filings to the parent’s own accounts and governance, businesses sometimes find themselves needing to coordinate finance and legal teams across two jurisdictions in a way they hadn’t planned for.

Timing is a third area where businesses trip up. Missing the one-month registration window after a UK establishment opens, or missing the director identity verification deadline on the anniversary of that registration, both create avoidable friction with Companies House.

How Paul Beare Helps With This

At Paul Beare, we help overseas companies work out which structure genuinely fits their plans before any registration takes place, whether that’s a branch, a subsidiary, or a representative office. Our company formation and structures https://www.paulbeare.com/uk-company-formation/ service covers the registration itself, including preparing and filing the Companies House paperwork correctly the first time.

Because branch compliance doesn’t stop at registration, we also support clients on an ongoing basis with the ongoing filings, tax registrations, and coordination with the parent company that a UK branch requires. If your structure decision also touches on directors and governance, our board structure and directors’ resolutions https://www.paulbeare.com/board-structure-directors-resolutions/ page covers that ground too.

Getting your UK structure right from the outset saves time and avoids unnecessary compliance headaches further down the line. If you’re weighing up a branch registration against the other ways to establish a UK presence, speak to our company formation and structures  https://www.paulbeare.com/uk-company-formation/ team. Contact Paul Beare https://www.paulbeare.com/contact/ today to talk through the right structure for your business.