Subsidiary vs branch: how to choose a structure for expansion

Key takeaways

• A subsidiary and a branch put the local operation in different legal positions. In UK government guidance, a subsidiary can be a separate legal entity, while a branch is an office of the existing overseas company. That difference should shape the first discussion about who will take on local obligations.
• Start with the legal person that will sign contracts, hold assets and carry the relevant obligations. For a UK branch, the overseas company is liable for the branch’s debts and obligations; a parent generally has no legal liability for a UK subsidiary’s debts and obligations, subject to the actual arrangements and applicable law.
• Choosing not to incorporate locally does not settle registration or tax questions. Companies House and HMRC apply separate UK tests: an overseas company may need to consider establishment registration where it has a physical presence, while corporation-tax conditions have their own triggers.
• Do not assume a branch is inherently the faster or cheaper route. UK government guidance gives typical setup estimates of one month for a branch and one day for a new subsidiary, while Companies House filing fees cover different processes and channels rather than total launch cost.
• Compare the continuing workload before deciding. A UK establishment can require parent documents and accounts filings, and its closure notice ends Companies House filing for that establishment. Put those requirements alongside contracts, tax, people and the route you may need as the operation grows.

What is the difference between a subsidiary and a branch?

A subsidiary can be a separate company from its parent. A branch remains part of the overseas company. Start by identifying which legal person will hold the local obligations, then check registration and reporting against the planned activity and target-country rules.

A subsidiary is a separate company

In UK government guidance, a company can establish a subsidiary as a separate legal entity from its existing overseas company. The parent generally has no legal liability for that subsidiary’s debts and obligations. “Generally” matters: a particular guarantee, contract or local rule can change the practical exposure, so the legal structure is a starting point for reviewing the arrangements rather than a substitute for that review.

For the local team, the useful first question is simple: which legal person should take on the proposed local obligations? Write down the entity that is expected to sign the contract, then test the intended arrangement under the target country’s rules before treating the subsidiary as a complete answer.

A branch is part of the foreign parent

UK government guidance describes a branch as a UK office of the existing overseas company, not a separate legal entity. Under that guidance, the existing company is liable for the branch’s debts and obligations. The branch route therefore keeps the parent at the centre of the legal-identity question.

Branch rules vary by jurisdiction. Baker McKenzie’s practitioner analysis describes differing branch-contracting rules across jurisdictions. Check the local rule before assuming a UK branch label carries the same result elsewhere.

Labels that are easy to confuse

“UK establishment” is the Companies House term for a place of business or branch of an overseas company in the UK. It describes a register category; it does not turn the branch into a separate company.

Keep three questions apart when planning a UK entry:

• Which legal person will carry the local operation?
• Does the planned activity create a UK establishment that requires Companies House registration?
• Do the facts create UK corporation-tax duties?

Carrying on business in the UK does not automatically require overseas-company registration. Companies House says the registration test turns on a degree of UK physical presence, such as a place of business or branch where the overseas company carries on business. HMRC’s corporation-tax conditions for a nonresident company are separate, so the legal label alone cannot settle either registration or tax treatment.

Compare the structures before you register

Compare the structures against the operation you plan to run. The table shows the UK baseline; the German legal and filing checks below add a second jurisdiction, while the US example addresses branch tax reporting. Each rule stays within its own jurisdiction.

Decision area	UK branch or establishment	UK subsidiary
Legal identity	An office of the overseas company; the parent is liable for branch debts and obligations.	Can be a separate company; the parent generally has no legal liability for its debts and obligations, subject to the actual arrangements.
Registration and documents	A UK establishment with the required physical presence must register with Companies House and provide overseas-company documents.	Company incorporation creates the separate local company.
Tax	The nonresident company’s UK activities and tax conditions require their own review.	UK tax residence and the company’s profits require their own review.
Continuing filings	Most registered overseas companies send accounts to Companies House; parent-law duties affect what they file.	Assess the local company’s filings under the applicable rules.

This is a UK starting point. A guarantee, tax treaty, local permission or specific contract can change the practical answer.

Legal identity, liability and control

In UK guidance, a subsidiary can be a separate legal entity from the overseas parent. The parent generally has no legal liability for the subsidiary’s debts and obligations. A branch is different: it is an office of the existing overseas company, and that company is liable for the branch’s debts and obligations.

Use that distinction to set the decision record before you begin forms or deadlines. Identify the proposed legal person for each local obligation, then examine any guarantees, agency arrangements and target-country rules that could affect the parent’s exposure. The UK baseline does not answer those questions for a particular contract or another jurisdiction.

Germany Trade & Invest describes a German subsidiary as an independent company predominantly held by a parent. A GmbH becomes a legal entity with limited liability when entered in the commercial register. A German branch remains part of the foreign head-office company; for an autonomous branch, that company is liable for the branch’s business transactions. Check the actual branch category before applying either registration route.

Tax, finance and profit flows

Tax treatment follows facts and jurisdiction, not the label “branch” or “subsidiary” alone. HMRC says a UK tax-resident company pays corporation tax on UK and foreign profits. Its guidance also says a non-UK-resident company with a UK office or branch pays corporation tax on profits from UK activities, while a nonresident company can face corporation-tax conditions through a permanent establishment or branch or agency.

The US example makes the same separation useful. The IRS treats a foreign corporation operating through a US branch as having a US trade or business and requires the foreign corporation to report effectively connected income on Form 1120-F. Its instructions also address branch profits tax and treaty conditions. Those rules do not establish a tax winner between structures; they show why the tax analysis needs the planned activities, profit facts and relevant jurisdiction.

Setup, filings and parent disclosure

For a UK establishment, Companies House requires registration documents within one month of opening. The filing can include form OS IN01, certified constitutional documents for the overseas company and, where parent law requires them, the parent’s latest accounts.

Continuing work can matter as much as the initial filing. Most registered overseas companies must send accounts to Companies House. Where parent law requires preparation, audit and disclosure of accounts, the documents must reach Companies House within three months of the parent-law disclosure date; companies without those parent-law duties still have UK account preparation and delivery requirements.

Germany has a different filing sequence. A GmbH enters the commercial register through a German notary, and its planned activity must be notified to the competent local trade office before operations begin. An autonomous branch needs commercial-register and local trade-office registration, including proof of the foreign head office’s existence and its representatives’ authority. Germany Trade & Invest describes local trade-office registration as the formal requirement for a dependent branch.

Published UK statutory fees cover different filing channels and processes. They cannot establish which structure will cost less to launch or operate.

People, customers and local permissions

Test the structure against the practical requirements of the operation, including the people you need to place locally and the permissions your activity requires. For the UK Expansion Worker sponsor-licence route, Home Office guidance lists a registered UK branch or subsidiary reference number, or a certificate of incorporation, among the documents that can evidence a UK footprint. That is a route-specific document option, not a general answer about hiring or immigration.

Customer, supplier, licensing and local-permission requirements also need their own target-country checks. Record the actual requirement before assuming that either form will be accepted, and keep that record separate from the company-register and tax analysis.

Check legal presence and tax presence separately

A legal-entity choice leaves two other questions open: whether the activity triggers company registration and whether it creates tax duties. The UK examples below show how to screen each question. Apply the relevant authority’s rules in the target jurisdiction.

Who signs contracts and carries the obligation?

Begin with the legal person that is intended to take on the local obligation. In UK government guidance, a branch is an office of the overseas company, and that existing company is liable for the branch’s debts and obligations. A UK subsidiary can be a separate legal entity; the parent generally has no legal liability for its debts and obligations.

Put the proposed contracting person next to each planned activity before choosing the form. Then review the relevant contracts, guarantees and local rules. The UK guidance gives a useful baseline, but it does not decide whether a particular parent will be bound by a particular agreement or local claim.

When does activity require registration?

Company-registration analysis starts with the activity and physical presence, not with the assumption that every overseas sale requires an establishment. Companies House says that carrying on business in the UK does not automatically require an overseas company to register. Its test requires some degree of UK physical presence, such as a place of business or branch where the company carries on business.

Its examples also draw a useful boundary: an independent agent acting for the company and an occasional hotel used during periodic director visits are not UK establishments. Record the premises, local activity and who carries it out, then test those facts against the target-country registration rules. A limited market test and an established local operation can produce different registration answers.

When can tax duties arise without a new company?

Tax presence needs its own analysis even when the company has not formed a local subsidiary. HMRC states that a nonresident company can be chargeable to UK corporation tax where it trades through a permanent establishment or branch or agency, alongside specified UK land or property cases. The company-register question and the tax question therefore have separate conditions.

The US provides another official example. The IRS considers a foreign corporation operating through a US branch to have a US trade or business, and it requires that corporation to report effectively connected income on Form 1120-F. US branch profits tax and treaty conditions can also be relevant under the Form 1120-F instructions.

For either structure, keep the tax facts in a distinct working note: planned activities, physical presence, contracting arrangements and the jurisdiction involved. That makes it harder to mistake company incorporation, overseas-company registration and tax treatment for one decision.

Map the real setup and continuing workload

A UK establishment can require documents from the parent company at registration and accounts after opening. Build the launch plan around both deadlines. For another country, use its own filing requirements.

Required documents and launch sequence

For a UK establishment, Companies House requires registration documents within one month of opening. The application includes form OS IN01 and a certified copy of the overseas company’s constitutional documents. If the original is not in English, the guidance calls for a certified English translation.

The same filing can require the overseas company’s latest accounts when parent law requires the company to prepare and deliver accounts. Ask the parent finance and legal teams for those documents before treating a UK branch as ready to open. A missing document or translation can change the practical launch sequence even where the legal structure is already chosen.

Accounts, reporting and public disclosure

The account-filing obligation continues after registration. Companies House says most registered overseas companies must send accounts to it. When the parent’s law requires the overseas company to prepare, audit and disclose accounting documents, the company must deliver those documents within three months of the date they are due for disclosure under parent law.

The alternative is not necessarily no reporting. Companies House says overseas companies that are not required by parent law to prepare, audit and disclose accounts must still prepare, sign and deliver accounts to it. Check the parent-law reporting calendar and the UK filing calendar together, so that each team knows which documents have to be prepared and when.

If the UK establishment closes, form OS DS01 is the Companies House closure notice. Once Companies House registers it, the overseas company no longer needs to file documents for that establishment. Add that register step to the exit plan early, while keeping the broader contract, tax and worker workstreams separately recorded.

What UK filing fees do and do not show

The published Companies House fees are useful for budgeting a named filing, not for declaring one structure cheaper overall.

UK filing	Published statutory fee	What the figure covers
Online company incorporation	£100	An online incorporation filing
Paper registration of a UK establishment of an overseas company	£124	A paper overseas-establishment registration filing

The two figures use different channels and legal processes. They do not measure professional support, translations, operating requirements or total launch cost. Use them as labelled line items in the plan, then build the wider budget from the actual route and operating facts.

Test the structure against the planned activity

The contracts, people and local authority needed for the operation may change which structure fits. Record those requirements alongside the legal and tax checks, including what the operation will need after the initial launch.

Sales, licensing, premises and counterparties

List each planned local activity: who will negotiate and sign customer contracts, where they will work, whether the business will maintain premises and what permissions the activity may require. Then ask the relevant counterparties and authorities what legal form or local presence they require. Do not infer acceptance from the name “branch” or “subsidiary.”

Berlin’s government portal provides a concrete activity check: a gastronomic business serving alcohol generally needs a permit before that activity starts. A registered company provides a current trade-register extract with its application; a GmbH or AG still being formed provides its agreement or statutes. This Berlin requirement does not establish a rule for other activities or for Germany as a whole.

some clients and other partners may prefer dealing with a local entity rather than a branch of a foreign company

— Tom Alun-Jones, Partner, London

Use that preference as a question to test in your own market, rather than a general rule. Record the written requirement or response alongside the planned contract, premises and permission facts so the choice rests on the actual operating case.

Employees, immigration and contractors

Separate the people plan from the company-form label. Identify who needs to work locally, which engagement route is contemplated and what immigration or sponsorship requirement applies to that route. A structure may provide a document required by one process without resolving every employment or contractor question.

For the UK Expansion Worker sponsor-licence route, Home Office guidance lists a registered UK branch or subsidiary reference number, or a certificate of incorporation, as one way to evidence a UK footprint. The route conditions and the individual’s circumstances still need to be reviewed under the applicable rules.

Local control, investors and financing

Write down how the parent and local team expect to make decisions, approve commitments and maintain the records that matter to an investor or lender. Assign an owner for each question before the launch timetable turns it into an urgent exception.

Use a short working list:

• Who is authorised to make the local commitment?
• Which records will show that authority and the operating arrangement?
• Which structure, documents or disclosures will a prospective investor, lender or counterparty request?
• What must change if the operation grows beyond the initial plan?

The answers depend on the company’s documents, counterparties and target-country rules. Keeping them in the same decision record makes it easier to identify when the original branch or subsidiary choice needs to be revisited.

Is a local entity needed for the first market test?

A market test may begin before local incorporation, depending on the activity and target-country rules. Describe the proposed work, physical presence, contracting arrangements and tax facts before selecting a route.

What limited activity may be possible without incorporation?

The UK Companies House examples show why the facts matter. Carrying on business in the UK does not automatically require an overseas company to register. Its guidance says an independent agent conducting business for the company is not a UK establishment, and neither is an occasional hotel used during periodic director visits.

Those examples do not create a safe harbour for every market test. Companies House says overseas-company registration depends on a degree of UK physical presence, such as a place of business or branch where the company carries on business. Capture the proposed activity and local footprint before treating a test as a no-entity route, then run the separate registration and tax checks for the target country.

Where contractor operations fit

If the initial operation involves genuine independent-contractor work after the company has selected the contractor, 4dev.com’s Contractor Platform can support task, agreement and documentation administration. Its scope includes a record of tasks, statuses, agreements, closing documents and engagement history.

That operational workflow sits outside the branch-versus-subsidiary decision. It does not determine who should contract locally, whether a company must register or whether tax duties arise. Keep the contractor-work workflow in the operating plan and assess the legal-structure questions on their own facts.

When a representative office, employer of record or acquisition is relevant

Consider these routes only after you have described the activity they would need to support. Write down the people involved, local authority needed to make commitments, premises, required permissions and the intended duration of the operation. Then apply the target-country rules to that specific route.

Do not assume a general preference among a representative office, an EOR, an acquisition, a branch or a subsidiary. Do not select one by analogy from another jurisdiction or from a limited pilot. A route-specific review should follow the actual operating plan.

Plan the next stage and the exit

Set a review point for growth and an exit plan before opening. A company-register filing deals with the register; contracts, tax and people need separate closure work.

Growing or transferring the operation

Set the review point before launch. For example, review the original choice when the local operation needs a different contracting arrangement, a more established local footprint or a different governance model. Record the assets, contracts, people, filings and tax accounts that would need to be examined if the operation changes shape.

Do not assume a branch can simply become a subsidiary. The transfer of specific contracts, assets, staff and tax positions depends on the documents and target-country rules. Treat a future change as a new implementation plan, with named owners for each affected record, rather than as an automatic consequence of growth.

Closing registrations, contracts and worker obligations

For a registered UK establishment, Companies House requires form OS DS01 when the establishment closes. Once it registers that document, the overseas company no longer needs to file documents for that UK establishment. Put the notice and its timing into the closure checklist.

A UK subsidiary follows a different register process. A limited company can apply for strike-off only when it meets conditions that include not trading or selling stock in the preceding three months and having no agreements with creditors. That illustrates why a branch closure notice and company dissolution should not be treated as the same task.

Before starting either process, create a separate closure record for the specific contracts, tax filings and worker arrangements in scope. The register action is one part of the exit plan; the remaining steps depend on the actual arrangements and the target jurisdiction.

How to make the choice

Put the planned activity and unresolved local rules into one worksheet. The parent and local teams can then assign an owner to each answer before choosing a form.

A decision worksheet for the parent and local team

Decision area	Record before choosing	Why it changes the decision
Legal person	Who will sign, take on the obligation and be named in the local arrangement	In UK guidance, a branch is part of the overseas company, while a subsidiary can be separate from it.
Registration	Planned activity, premises, local presence and registration trigger	A UK overseas-company registration turns on physical presence, not simply carrying on business.
Tax	Planned activities, physical presence and relevant jurisdiction	Tax conditions can arise separately from the company-register analysis.
Filings	Parent documents, accounts calendar, filing channel and ongoing returns	A UK establishment can require parent documents and continuing accounts filings.
People and counterparties	Immigration route, customer requirements, permissions and the local authority needed	These requirements need their own route and target-country checks.
Change or exit	Review point, closure action and the records affected by a future change	A Companies House closure notice and a subsidiary strike-off are different processes.

Give each row an owner and a date for the answer. Where the answer rests on a contract, a guarantee, a tax position or a local permission, save the relevant document with the worksheet instead of relying on a conclusion from an earlier market entry.

When a branch may fit

Consider a branch first when the proposed arrangement is intended to remain part of the overseas parent and the target-country analysis supports that route. In the UK example, a branch is an office of the existing overseas company, and the existing company is liable for its debts and obligations.

That starting point does not settle registration, tax or operating workload. Test the planned local presence against the registration rules, assess tax facts separately and include the UK establishment’s parent-document and account-filing requirements where they apply. A branch should be a reasoned choice, not a shortcut assumed to be faster or cheaper.

When a subsidiary may fit

Consider a subsidiary first when the operating plan calls for a separate local legal entity and the target-country analysis supports forming one. UK government guidance recognises a subsidiary as a separate legal entity from the existing overseas company, with the parent generally having no legal liability for the subsidiary’s debts and obligations.

The word “generally” leaves work to do. Review the actual contracts, guarantees and local rules, then assess the tax, registration, people and disclosure implications on their own terms. A separate company may answer the legal-identity question without deciding every practical requirement of the expansion.

Frequently asked questions

Is a branch a separate legal entity?

In UK government guidance, no. A UK branch is an office of the existing overseas company and is not a separate legal entity. The legal treatment of a branch can vary by jurisdiction, so use the target country’s rules for a local conclusion.

Can a branch sign contracts?

That depends on the target jurisdiction and the proposed arrangement. The UK guidance establishes that the branch is part of the overseas company; it does not establish a universal rule on contracting capacity. Identify the legal person intended to be bound, then review the relevant local rules and contract terms.

Is a branch always cheaper or faster to open?

No. UK government guidance gives typical setup estimates of one month for a branch and one day for a new subsidiary, but those are setup estimates rather than operating-readiness guarantees. Published Companies House filing fees also cover different processes and channels, so they do not establish a total-cost winner.

Are branches and subsidiaries taxed differently?

They can have different tax treatment, but the answer depends on the jurisdiction and facts. In the UK, HMRC says a tax-resident company pays corporation tax on UK and foreign profits, while a non-UK-resident company with a UK office or branch pays corporation tax on profits from UK activities. A nonresident company’s corporation-tax conditions are assessed separately from the company-register question.

Can a branch become a subsidiary later?

Do not assume the change is automatic. The treatment of specific contracts, assets, staff and tax positions depends on the documents and target-country rules. Plan a later change as its own implementation project, with the relevant records and owners identified in advance.

Can an employer of record replace either structure?

An employer of record (EOR) is a separate route that needs to be assessed against the planned activity, people arrangement and target-country requirements. Do not assume it replaces a branch or subsidiary in every case. First identify the local obligations, contracting model and immigration or employment route that the operation requires.

The decision in one view

Choose the structure after you have a written description of the local operation. For a UK entry, the first distinction is clear: a branch remains part of the overseas company, while a subsidiary can be a separate legal entity. That distinction frames the legal-person and parent-exposure questions; it does not decide registration, tax, filings or operating readiness.

Use this sequence:

1. Name the legal person expected to take on each local obligation.
2. Map the proposed activity, physical presence and local contracting arrangements.
3. Test company-registration and tax conditions separately in the target jurisdiction.
4. Compare the documents, accounts, people requirements and counterparties against the route you are considering.
5. Set a review point for growth and record the closure process before the operation opens.

A branch may be the route to examine where the parent is intended to remain at the centre of the local arrangement. A subsidiary may be the route to examine where the plan calls for a separate local company. In either case, make the final choice from the specific contracts, target-country rules and operating facts rather than from an assumed rule about speed, cost or tax.

Sources

• Set up and register your business in the UK — Business.gov.uk
• Overseas companies registered in the UK — Companies House
• Choosing a branch or subsidiary for overseas expansion — Baker McKenzie / Law360
• Companies House fees — Companies House
• CTM34210: Charge to corporation tax: companies resident outside the UK — HMRC
• Corporation Tax: Overview — HMRC
• Foreign corporation Form 1120-F filing responsibilities — Internal Revenue Service
• Instructions for Form 1120-F — Internal Revenue Service
• Appendix A: supporting documents for sponsor licence applications — Home Office
• Strike off your company from the Companies Register — GOV.UK
• Company Set Up in Germany — Germany Trade & Invest
• Branch Offices — Germany Trade & Invest
• Gastronomic trade: apply for permit — State of Berlin
• Branch vs subsidiary: what are the differences? — Saffery