This guide is maintained as a current resource for July 2026 and covers only the laws of England and Wales. Information is for general guidance, not legal advice. Consult a qualified solicitor for advice specific to your situation.
Overview of incorporation documents required for UK company registration, including IN01 form, articles of association, memorandum, PSC information, share capital details, SIC codes, and legal requirements under the Companies Act 2006.

When forming a company in England and Wales, specific incorporation documents must be submitted to Companies House before the company can legally exist. These documents form the legal foundation of the company and establish its structure, ownership, and governing rules under the Companies Act 2006.
The incorporation process is primarily completed online using the IN01 application form, alongside supporting constitutional documents. Each document plays a defined legal role in confirming that the company has been properly formed and complies with UK company law requirements.
This article explains the core incorporation documents required for company registration, their legal purpose, and how they interact to create a valid company structure.
Legal Framework for Incorporation
Company formation in the UK is governed by the Companies Act 2006. Under this framework, a company comes into legal existence only when it is registered by the Registrar of Companies at Companies House.
To achieve registration, applicants must submit prescribed information and documents, ensuring that:
- The company has a valid legal structure
- Directors and shareholders are properly identified
- Share capital and ownership are clearly recorded
- The company agrees to comply with company law obligations
Once accepted, Companies House issues a certificate of incorporation, confirming the company's legal personality.
Main Incorporation Documents Required
1. Application for incorporation (IN01 form)
The IN01 form is the primary incorporation document. It contains all essential information about the company, including:
- Proposed company name
- Registered office address
- Directors' details
- Company secretary details (if applicable)
- Statement of capital and shareholdings
- Share classes and rights
- Persons with Significant Control (PSC) information
- SIC codes describing business activity
This document is legally binding and forms the basis of the public record.
2. Memorandum of association
The memorandum of association is a short legal statement signed by the initial shareholders (subscribers). It confirms that:
- The subscribers agree to form a company
- They agree to become members of the company
- They undertake to take at least one share each (for companies limited by shares)
Under modern UK company law, the memorandum is largely a formal document required for incorporation only. It does not govern ongoing company operations.
3. Articles of association
The articles of association are the company's internal rulebook. They govern how the company is run and regulate relationships between:
- Directors
- Shareholders
- The company itself
Articles typically cover:
- Director powers and decision-making
- Shareholder voting rights
- Dividend distribution rules
- Share transfers and restrictions
- Meetings and resolutions
- Procedures for issuing new shares
A company may adopt:
- Model articles provided by the government
- Customised articles tailored to specific business needs
The articles become legally binding once the company is incorporated.
4. Statement of capital and initial shareholdings
This document sets out the company's share structure at incorporation, including:
- Number of shares issued
- Nominal value of shares
- Share classes (e.g. ordinary, preference)
- Amount paid or unpaid on shares
- Allocation of shares to each subscriber
It forms part of the IN01 application but is treated as a key standalone legal disclosure of ownership and capital structure.
5. Statement of proposed officers
Companies must provide details of individuals who will act as:
- Directors
- Company secretary (if appointed)
This ensures that the company has legally accountable officers from the moment of incorporation.
Directors must meet statutory eligibility requirements, including:
- Being at least 16 years old
- Not being disqualified from acting as a director
6. Persons with Significant Control (PSC) statement
The PSC statement identifies individuals or entities who ultimately control the company. It must include:
- Names of PSCs
- Nature of control (e.g. shareholding or voting rights)
- Corresponding thresholds met
If no PSC exists at incorporation, the company must declare this and continue monitoring for future changes.
7. Registered office address details
A valid registered office address must be provided. This is the official address where:
- Legal documents are served
- Government correspondence is sent
- The company is recorded on the public register
The address must be located in the jurisdiction of incorporation (England and Wales, Scotland, or Northern Ireland).
8. SIC codes (business activity classification)
Companies must include at least one SIC code describing their business activity. This classification is used for:
- Public record identification
- Government statistical analysis
- Regulatory categorisation
The SIC code does not determine tax status but forms part of official company data.
Legal Effect of Incorporation Documents
Once submitted and approved:
- The company becomes a separate legal entity
- The documents form part of the permanent public record
- The company is bound by its articles of association
- Shareholders become legally recognised members
- Directors assume statutory duties under company law
The incorporation documents collectively define the company's legal identity from the moment of registration.
Common Errors in Incorporation Documentation
1. Incorrect company information
Errors in names, addresses, or officer details can delay incorporation or lead to rejection.
2. Incomplete share structure
Failure to correctly define share classes or allocation may create legal uncertainty over ownership.
3. Inaccurate PSC disclosure
Incorrect PSC reporting can lead to compliance breaches and regulatory penalties.
4. Inconsistent articles and share rights
Conflicts between the articles and statement of capital can result in internal governance disputes.
Legal Risks of Non-Compliance
Failure to provide accurate incorporation documents may result in:
- Rejection of the application
- Delayed company formation
- Criminal liability for false or misleading statements
- Future disputes over ownership or control
- Difficulties opening bank accounts or securing investment
Financial institutions and regulators rely heavily on incorporation documents during due diligence.
Importance of Incorporation Documents in Practice
These documents are not merely administrative requirements. They:
- Define ownership and governance structure
- Establish legal rights of shareholders and directors
- Provide transparency to the public and regulators
- Support commercial trust in business transactions
- Form the foundation for future investment, mergers, and disputes
Proper preparation is essential for long-term legal and commercial stability.
Common Questions from our Readers
Are incorporation documents public?
Most incorporation information, including directors and PSC details, is publicly available via Companies House.
Can incorporation documents be changed later?
Some elements, such as articles of association and officer details, can be updated after incorporation through formal filings.
Do all companies need the same documents?
Yes, although requirements may vary slightly depending on company type (e.g. limited by shares vs limited by guarantee).
Is a solicitor required to prepare incorporation documents?
No, but many companies use legal or professional services to ensure accuracy and compliance.
Key Takeaways
Incorporation documents are essential legal filings required to register a company in the UK. They include the IN01 application, memorandum of association, articles of association, statement of capital, PSC details, officer information, SIC codes, and registered office details.
Together, these documents establish the company's legal structure, ownership, and governance framework. Accuracy is critical, as these records form the permanent foundation of the company's legal identity and are relied upon by regulators, banks, and courts.