If you are starting a business in the UK, you will quickly encounter the name Companies House. It is the organisation responsible for registering companies, maintaining the UK company register and making important company information publicly available.

But Companies House is more than a place where you register a business name. It plays a central role in the UK's corporate system, from company incorporation and record-keeping to corporate transparency and the formal closure of companies. For founders, entrepreneurs and international business owners considering a UK company, understanding what Companies House does and what it does not do is essential.

What Is Companies House?

Companies House is the UK's official registrar of companies. It is an executive agency of the Department for Business and Trade and maintains the register of UK companies. It also maintains the Register of Overseas Entities. Its core responsibilities include:

• Incorporating companies
• Maintaining company records
• Receiving and publishing information companies are legally required to provide
• Dissolving companies
• Providing public access to company information
• Supporting greater corporate transparency
• Helping identify and disrupt economic crime

There are millions of companies on the UK register, and Companies House processes hundreds of thousands of new incorporations each year. In simple terms, Companies House is the official public record for UK companies. That distinction matters. Registering a company with Companies House creates a legal corporate entity, but it does not automatically mean the business has permission to conduct every type of activity. Depending on the business, you may still need licences, registrations, professional authorisations or tax registrations elsewhere.

What Does Companies House Actually Do?

Companies House has several important functions that affect businesses throughout their lifecycle.

1. It Incorporates Companies

The most obvious role of Companies House is company formation. When you create a UK private limited company, the incorporation process formally creates the company as a separate legal entity. For example, suppose an entrepreneur wants to establish BrightPath Consulting Ltd. During incorporation, information about the proposed company is submitted to Companies House.

If the application is accepted, the company is registered and receives a unique company number. The company then exists separately from its shareholders and directors. This separation is one of the major attractions of a limited company structure. Generally, shareholders have limited liability in relation to their shares, although limited liability does not mean directors or shareholders are protected from every possible business liability.

2. It Maintains the Company Register

Companies House does not simply register a company and forget about it. Throughout the company's life, it receives information that must be filed and maintains that information on the public register. This can include details about:

• The company name
• Registered office
• Directors
• Persons with significant control (PSCs)
• Shareholders and share capital
• SIC codes
• Annual accounts
• Certain charges and mortgages
• Other statutory filings

Much of this information can be searched online by members of the public. This is particularly important when dealing with suppliers, investors, lenders and potential customers. A prospective business partner can look up a company's basic corporate information before deciding whether to work with it.

3. It Makes Company Information Public

Transparency is one of Companies House's most important functions. The public register allows people to investigate UK companies and understand who runs and controls them. For example, someone considering a contract with a UK company might check:

• When the company was incorporated
• Who its directors are
• Who controls it
• Whether accounts have been filed
• Whether the registered office is current
• The company's filing history

Companies House states that its register is available worldwide and can be searched online. This creates an important trade-off for entrepreneurs: a UK limited company provides a formal corporate structure, but that structure comes with transparency obligations.

What Information Is Available at Companies House?

One of the biggest misconceptions among new founders is that company registration is completely private. It is not. Certain company information becomes part of the public record.

Company details

The register can show information such as the company's:

• Registered name
• Company number
• Incorporation date
• Registered office
• SIC codes
• Status
• Filing history

Directors

Companies must provide information about their directors. This is important because directors have legal responsibilities and are accountable for ensuring that information required by law is properly filed.

Persons With Significant Control

The register also includes information about people who exercise significant control over a company. A PSC may, for example, be an individual who owns or controls a significant proportion of the company's shares or voting rights. This helps make ownership structures more transparent.

Accounts and financial information

Companies also have obligations concerning annual accounts and other financial filings. The exact requirements vary according to factors such as company size and circumstances, so business owners should not assume that every company has identical filing obligations.

What Is Companies House Used For?

For entrepreneurs, Companies House serves several practical purposes.

Starting a UK company

If you want to establish a UK limited company, Companies House is central to the incorporation process. This applies to businesses ranging from:

• Consultants
• Technology startups
• E-commerce companies
• Marketing agencies
• Property businesses
• Recruitment companies
• Creative businesses
• International trading companies

The business activity does not generally change the fundamental role of Companies House, although some industries have additional regulatory requirements.

Checking another business

Companies House is also a research tool. Before entering a major commercial relationship, you can search for a company and examine its publicly available information. For example, a supplier might check whether a prospective customer actually exists, while an investor could examine a company's filing history before progressing discussions. Companies House provides a free service for searching company information and accessing company documents.

Keeping your company legally up to date

After incorporation, directors remain responsible for ensuring that the company's information stays accurate. This is where many first-time founders underestimate the role of Companies House. Company formation is not the end of the process; it is the beginning of your company's statutory reporting responsibilities.

What Does a UK Company Need to File With Companies House?

The exact requirements depend on the company's circumstances, but two important ongoing obligations are annual accounts and the confirmation statement.

Annual accounts

Most companies must prepare and file annual accounts with Companies House. These accounts provide information about the company's financial position and performance, subject to the company's applicable reporting requirements and exemptions. The filing deadline depends on the company's circumstances and accounting period. Because late filing can lead to penalties, directors should treat the accounts deadline as a serious statutory obligation rather than an administrative formality.

Confirmation statement

Every company, including dormant and non-trading companies, must file a confirmation statement at least once every year. The confirmation statement essentially confirms that Companies House's information about the company is correct. It can cover information such as:

• Directors
• Company secretary, where applicable
• PSCs
• Registered office
• Registered email address
• Statement of capital
• Share information

Companies House has also introduced identity verification requirements as part of its wider corporate transparency reforms. Directors and other relevant individuals may need to verify their identity and provide a Companies House personal code.

What Companies House Does NOT Do

Understanding the limits of Companies House is just as important as understanding its responsibilities.

Companies House is not HMRC

Companies House and HM Revenue & Customs (HMRC) are different organisations. Companies House deals primarily with company registration and statutory corporate information. HMRC deals with taxation. For example, forming a limited company does not mean that every tax obligation has automatically been dealt with. Depending on the business, you may need to deal with Corporation Tax, PAYE, VAT and other tax matters.

Companies House is not a business licensing authority

Registering a company does not automatically give you permission to operate a regulated business. A company operating in financial services, healthcare, transport, food, recruitment or another regulated sector may have additional requirements. This distinction is particularly important for international founders who may assume that a UK company registration is equivalent to a general business licence. It is not.

Companies House does not run your business

Companies House does not manage your accounts, negotiate your contracts, employ your staff or make business decisions. Those responsibilities belong to the company's directors and management. The director remains responsible for ensuring that information submitted to Companies House is accurate and that statutory obligations are met.

Why Companies House Matters to International Founders

For non-UK entrepreneurs, Companies House can be particularly valuable because a UK company creates a formal corporate presence within the UK. However, international founders should look beyond incorporation. A UK company may require consideration of:

• UK registered office arrangements
• Company administration
• Corporate banking or payment services
• Tax obligations
• Accounting
• Identity verification
• Business-specific licences
• Contracts and commercial documentation
• Data protection requirements
• Immigration considerations if the founder intends to work physically in the UK

Importantly, owning a UK company does not automatically give a foreign founder the right to live or work in the UK. This is an area where incorporation and immigration should be treated as separate issues. For global founders, platforms such as IncorpUK can be relevant when navigating UK company formation and ongoing company-management requirements, but incorporation should always be considered alongside the wider legal, tax and operational needs of the business.

How to Use Companies House to Check a Company

Before working with a UK company, you can search the Companies House register and review its public information. A sensible basic check includes:

Step 1: Confirm the company exists

Search the company name or company number.

Step 2: Check its status

Look at whether the company is active, dissolved, in liquidation or has another status.

Step 3: Review the directors

Check who is listed as responsible for managing the company.

Step 4: Check PSC information

Review available ownership and control information.

Step 5: Examine filing history

Look at accounts, confirmation statements and other filings.

Step 6: Check registered details

Confirm the registered office and other relevant information. This is not a substitute for proper due diligence, but it is a useful first step.

Companies House and Corporate Transparency

The role of Companies House is changing. The Economic Crime and Corporate Transparency Act has given Companies House stronger powers and expanded its role in improving the accuracy and reliability of company information and helping tackle economic crime.

This is significant for modern businesses. Historically, Companies House was often viewed primarily as a registration database. Increasingly, it is becoming an important part of the UK's broader corporate transparency and economic-crime prevention framework. For legitimate businesses, this means accurate records are becoming increasingly important.

For founders, the practical lesson is straightforward: treat Companies House information as a core part of your company's corporate records, not paperwork to be completed once a year and forgotten.

Common Mistakes Business Owners Make With Companies House

Several problems appear repeatedly among new company owners.

Choosing the wrong SIC code

Your SIC code describes your company's principal business activity. Choosing an inappropriate code can create confusion about what the company does.

Forgetting the confirmation statement

Even dormant companies generally have to file confirmation statements.

Allowing company information to become outdated

Changes to directors, registered office details, ownership or other information may need to be reported.

Assuming incorporation handles tax

It does not. Companies House and HMRC have different responsibilities.

Treating the registered office casually

Official company correspondence may be sent there, so businesses should have a reliable arrangement for receiving important documents.

Assuming a UK company equals a UK business licence

Some industries require additional regulatory approval.

Frequently Asked Questions About Companies House

Is Companies House a government organisation?

Yes. Companies House is an executive agency of the Department for Business and Trade and is responsible for the UK's company register.

What is the main purpose of Companies House?

Its main functions include incorporating and dissolving companies, maintaining corporate information and making required information available to the public.

Can anyone search Companies House?

Yes. The Companies House register is publicly searchable online, and company information can be accessed free of charge through its search service.

Does Companies House collect Corporation Tax?

No. Corporation Tax is administered by HMRC. Companies House and HMRC have separate responsibilities.

Do sole traders register with Companies House?

Generally, no. Sole traders are not incorporated companies and are therefore not registered with Companies House in the same way as limited companies.

Do I need to file with Companies House every year?

Companies have ongoing filing obligations. In particular, every company must file a confirmation statement at least once every year, while accounts must also be filed according to the applicable requirements.

Does registering a company mean I can operate any business in the UK?

No. Certain activities require additional licences, registrations or regulatory authorisation. Company incorporation and sector-specific permission are separate matters.

Can foreigners register a UK company?

A person does not generally need to be a UK citizen to become involved in a UK company, but incorporation requirements, identity verification, registered office requirements, banking, tax and immigration considerations should all be assessed separately.

Conclusion: Companies House Is More Than a Registration Database

Companies House sits at the heart of the UK's corporate infrastructure. It is responsible for incorporating and dissolving companies, maintaining the company register and publishing information that allows the public, investors, customers and other businesses to understand who companies are and who controls them.

For founders, the most important point is that registering a company is only the first step. Once incorporated, a business has continuing responsibilities to keep its information accurate and meet its statutory filing obligations. If you are establishing a UK company, particularly as an international entrepreneur understanding Companies House helps you avoid common mistakes and build a more credible, properly managed business from the outset.

The best approach is to treat company formation, tax, accounting, regulatory compliance and ongoing corporate administration as connected parts of running a business, rather than separate boxes to tick.