How to Register a Company in the UK: Step-by-Step Guide
Perhaps you’re self-employed and looking to expand your business, or you have just registered a company in the UK. Or maybe you’re looking to start a new endeavour from scratch, and want to raise capital by selling shares. Whatever the reason, you’re thinking about creating an incorporated business, often called a company, including how to register company limited entities correctly.
There are several steps to go through to establish and register a new company, but first and foremost is understanding what you’re signing up for.
What are the advantages of forming a company?
A limited company is a kind of incorporated business, meaning that the business is considered a separate entity under the law. The business’ finances are separate from the owners’.
Companies have access to different tax rules and options for raising funds, but are subject to stricter regulations. This includes more accountability to people who have invested in the business, as well as to the public. It also means having to submit more reports and documents to HMRC and Companies House.
But there are many kinds of legal businesses, If you’re aiming to be the sole owner and don’t need much external funding, being a sole trader is likely more appropriate. If you have a few external investors who won’t have any control of the business, a limited partnership may be best.
Even within the limited company category, there are several distinct structures to consider. The full breakdown of the different types of limited companies available in the UK sets out how each one works and which situations each structure is best suited to.
If you are still weighing up whether a limited company is the right structure for your situation, our guide on whether you should incorporate your business covers the key considerations to help you decide before you register.
Forming a company is often the first step for individuals who want to understand how to incorporate a company in the UK and move from self-employment into a more structured legal arrangement. When you incorporate the business, it becomes a separate legal entity, which changes how profits, liabilities, and taxation are handled.
The incorporation decision also marks the point where tax efficiency becomes a structuring consideration. How you set up your company from the outset including how profits are extracted and whether subsidiary structures are used directly affects your long-term tax position. The full picture of optimising corporate structure for tax efficiency is worth reviewing before finalising your setup.
This distinction is important when comparing a limited company vs incorporated business setup, as incorporation introduces both greater protection and additional compliance responsibilities. For many business owners, this stage is where they begin to evaluate whether to business incorporate in order to scale operations more efficiently and access wider funding opportunities.
Choose a name
You must choose a name for your company, which must usually end in ‘Limited’ or ‘Ltd’. You can also use the Welsh equivalents Cyfyngedig’ and ‘Cyf’ if you registered the company in Wales.
A name is considered the ‘same as’ another if the only difference is punctuation, special characters, or words that look similar or mean the same thing. You will need to be part of the same group as or have written consent from a company to use a name considered the ‘same as’ its own.
Your company name also cannot be offensive, or use any legally protected terms like ‘Accredited’. This is an important consideration when working through the company register London process.
Appoint a director
You will need to appoint at least one director for the company. They will be legally responsible for keeping company records, filing tax returns, and paying corporation tax. Directors do not have to live in the UK but the company must have a UK registered office address.
Businesses or individuals based outside the UK that are looking to establish a presence here through a formal corporate structure should also be aware of the separate rules that apply when registering as an overseas company, which differ from standard UK incorporation procedures.
What if I don't have a physical office?
All limited companies need to have a ‘registered office address’. However, this does not mean you need to own or rent a building just for this use.
Understanding what counts as an appropriate address for a company including what HMRC and Companies House require and what restrictions apply helps avoid registration issues before they arise.
At CIGMA Accounting we offer services which allow you to use our address as your company’s registered address. We also offer services that can take you all the way through the incorporation process.
Decide on shareholders or guarantors
Most limited companies are ‘limited by shares’. This means they’re owned by shareholders, who have certain rights and ‘limited liability’ – they only stand to lose the money they have paid in for their shares.
Company profits are usually divided between shareholders according to what percentage of the shares they own, referred to as dividends.
A company limited by shares must have at least one shareholder, who can also be the director. The price of an individual share can be any amount, and usually give their holders one vote on company decisions per share. If you are still deciding which type of company formation best suits your needs, our guide on comparing company formations in the UK sets out the full range of structures and their practical differences.
Companies can also be ‘limited by guarantee’. Instead of shareholders, these companies have guarantors who have promised to pay a set amount of money if the company cannot pay its debts.
Choosing between shareholders or guarantors is a defining feature of how a company is structured once you incorporate the business. Most businesses choose a share-based model, which is common among companies that are incorporated for profit-driven growth.
This structure also defines ownership rights, voting control, and dividend distribution, making it a key consideration when deciding how to properly business incorporate. Understanding this setup is essential when evaluating what it means to operate as a UK incorporated company compared to simpler business forms.
Shareholders, Control, and Ownership in a Limited Company Structure
A person with significant control of your company (PSC) is someone who:
- Holds more than 25% of shares
- Has more than 25% of voting rights
- Can appoint or remove the majority of directors
You will need to submit a list of PSCs when you register your company with Companies House. You will need details about your PSCs such as their date of birth and home address.
Identifying People with Significant Control is a transparency requirement for all companies that are incorporated in the UK. This ensures that ownership structures remain clear and compliant with regulatory expectations.
For businesses operating across multiple entities or considering how ownership is distributed between related companies, understanding what a group company structure involves including how control is defined and what reporting obligations arise is an important early consideration.
When learning how to incorporate a company in the UK, many business owners overlook this step, but it is essential for establishing accountability within a UK incorporated company. It also helps distinguish legitimate corporate structures from informal or unincorporated businesses, where such disclosure rules do not apply.
Company agreement documents
To register your company, you will need a ‘memorandum of association’ and ‘articles of association’.
The memorandum of association is a legal statement signed by all initial shareholders or guarantors agreeing to form the company. This will be created automatically if you register online.
The articles of association are written rules about running the company agreed by the shareholders or guarantors, and directors. You can use premade standard articles or write up your own.
When you incorporate the business, you must prepare formal constitutional documents such as the memorandum and articles of association. This is a key part of company registration in London and how the structure is legally formed.
Unlike unincorporated business examples, where agreements can often be informal, a limited company vs incorporated structure requires legally binding documentation that governs decision-making, ownership, and operational rules.
The final step in learning how to incorporate a company in the UK is registering with Companies House, which officially creates your UK incorporated company. At this stage, the business becomes a separate legal entity, marking the clear transition from an unincorporated setup to a formal corporate structure. This process is central to understanding how to properly business incorporate, as it triggers both legal recognition and automatic registration for Corporation Tax, finalising the incorporation process.
Check which records you need to keep
Aside from your PSC list mentioned earlier, you must keep other records about the company and its accounting.
Among others, you will need to keep documents recording:
- The directors and shareholders
- The results of shareholder votes
- Company loans and repayment dates
- Bought and sold shares
Your accounting records will need to include the following, though this is not the full list:
- All money received and spent
- Details of assets
- Debts the company owes or is owed
You are expected to keep records for at least six years.
How to Register a Company with Companies House in the UK
To register your company, you will need to provide an office address. This address must be a physical address in the UK and be in the same country that the company is registered in.
You will also need to use this document to check what your business’ SIC code is. The ‘standard industrial classification of economic activities’ (SIC) describes the kind of business or trade your company engages in.
You can then use this service to register your company with Companies House. You will also be registered for Corporation Tax at the same time, meaning registering for Corporation Tax is completed as part of the incorporation process. For the registration, you will need personal details about shareholders or guarantors, such as their town of birth and telephone number.
Companies involved in property development with offshore elements should note that their Corporation Tax registration involves additional requirements beyond the standard process. The specific steps for registering an offshore property developer for Corporation Tax are set out separately and should be reviewed before proceeding.
If you are not yet familiar with how Corporation Tax works and what your obligations will be once registered, our guide to understanding Corporation Tax explains the key rates, thresholds, and filing requirements in detail.
Avoid Mistakes When Registering Your Company
At Cigma Accounting, we support new business owners across London through every stage of the incorporation process, ensuring Companies House registration, HMRC setup, and compliance requirements are handled correctly from the start. From Farringdon, including Blackfriars and St Paul’s, many entrepreneurs seek clarity on forming a limited company, and our company formation accountant London service provides structured, practical support to make the process smooth and fully compliant.
Registering a company correctly is essential to avoid future tax issues, filing errors, and unnecessary administrative delays that can impact early business growth. With physical offices across London, we also assist clients looking for accounting services in London, helping them build a strong financial foundation from day one while staying fully aligned with UK regulatory requirements.
Frequently Asked Questions About How to Register a Company in the UK
What does it mean to incorporate the business in the UK?
To incorporate the business means to legally register it as a separate entity with Companies House. Once incorporated, the company can trade, own assets, and pay tax in its own name, separate from its owners, providing limited liability protection.
How do you incorporate a business in the UK?
To business incorporate in the UK, you must register with Companies House, providing details such as company name, directors, shareholders, and registered address. Once approved, the business becomes a UK incorporated company with legal status.
What is a UK incorporated company?
A UK incorporated company is a legally registered business recognised by Companies House. It operates as a separate legal entity, meaning it is responsible for its own debts, taxes, and obligations, distinct from its owners or shareholders.
Are private limited companies incorporated?
Yes, private limited companies are incorporated businesses. This means they exist as separate legal entities from their owners, offering limited liability protection and requiring formal registration with Companies House before trading.
What is the difference between a limited company and an incorporated business?
A limited company is a type of incorporated business. Incorporation refers to the legal process of forming a separate entity, while “limited company” describes a specific structure that provides limited liability to its shareholders.
What companies are considered incorporated in the UK?
Companies that are incorporated in the UK include private limited companies, public limited companies, and limited liability partnerships. These entities are legally registered with Companies House and operate separately from their owners.
Start Your UK Company With the Right Tax and Compliance Structure
In 2026, correct corporate tax compliance starts at company formation. We help UK businesses with registration, ensure strong corporate tax optimisation, and set up structures that support accurate HMRC reporting, efficient tax planning, and long-term compliance success.
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