How to Open a UK Company for Accountants

Starting an accountancy practice in the UK can be a straightforward process, but setting up the company is only the beginning. Accountants operate in a profession where company law, tax, anti-money laundering requirements, professional standards and client confidentiality all intersect.

For an accountant planning to work independently, serve international clients or build a growing practice, a UK private limited company can provide a clear legal structure and a professional foundation for the business. This guide explains how to open a UK company for an accountancy business, what information you need, the compliance obligations to consider, and the issues that become important as the practice grows.

Can an Accountant Open a UK Limited Company?

Yes. An accountant can establish a UK private limited company to operate an accountancy practice. The company can provide services such as bookkeeping, accounts preparation, payroll, tax services, management accounts and business advisory work, subject to any applicable professional and regulatory requirements.

A limited company is a separate legal entity from its owners. This means the company's contracts, assets, liabilities and finances are generally distinct from those of its directors and shareholders. For a small practice, the structure can also make it easier to:

• Separate business and personal finances
• Employ staff or contractors
• Bring in additional shareholders
• Build a recognisable business brand
• Work with corporate clients
• Reinvest profits into the practice
• Develop the business for future sale or succession

However, incorporation does not automatically make an accountant authorised to provide every type of financial or professional service. The services offered should be considered separately from the process of forming the company.

Step 1: Decide Whether a Limited Company Is Right for Your Practice

Before registering a company, consider how you intend to operate. A sole trader structure may be sufficient for someone testing a small freelance bookkeeping service. A limited company can become more attractive where the founder expects recurring clients, employees, significant turnover or plans to build a larger practice.

For example, imagine an accountant named Sarah who initially provides bookkeeping to ten small businesses. She may start with a simple structure while validating demand. A few years later, Sarah has 60 clients, two employees, a payroll service and plans to acquire another small practice. At that point, having a dedicated corporate structure may make commercial and operational sense.

The decision should take account of tax, administration, professional obligations and long-term plans rather than being based solely on the perceived tax advantages of incorporation.

Step 2: Choose Your Company Name

Your company name must comply with UK company naming rules and should not be confusingly similar to an existing company. For an accountancy practice, naming deserves extra consideration because the name becomes part of the firm's professional identity. Before choosing one, check:

1. Companies House name availability
2. Relevant trademarks
3. Domain availability
4. Social media availability
5. Whether the name accurately represents the services you intend to provide

Avoid choosing a name simply because the corresponding domain is available. A professional name that remains suitable when the practice expands is usually more valuable. If you expect to offer tax advisory, bookkeeping, outsourced finance or business advisory services later, consider whether the name will still make sense beyond your initial offering.

Step 3: Choose the Directors and Shareholders

A UK private limited company normally has at least one director, and the director does not have to be a shareholder. The director is responsible for managing the company and meeting its legal obligations. Shareholders own the company's shares. A solo accountant could therefore establish a company with:

• One director
• One shareholder
• 100 ordinary shares

A two-founder practice might instead divide ownership between two shareholders. The important point is to think carefully about ownership before incorporation. Changing the share structure later is possible, but decisions about ownership, voting rights and future investment can become much more complicated once other people are involved. If there are multiple founders, consider having a shareholders' agreement covering matters such as decision-making, dividends, share transfers, founder departures and disputes.

Companies House identity verification

Identity verification is now an important part of UK company administration. Since 18 November 2025, identity verification requirements have been introduced as part of the reforms under the Economic Crime and Corporate Transparency Act. New directors must verify their identity when incorporating or being appointed, while existing directors and people with significant control (PSCs) are being brought into the system during the transition period.

This means accountants establishing a new practice should factor identity verification into their incorporation process rather than treating it as an optional administrative step.

Step 4: Choose a Registered Office Address

Every UK company needs an appropriate registered office address. This is the official address where Companies House and other authorities can send formal correspondence. The address is publicly visible, so an accountant working from home may prefer not to use their residential address if a suitable alternative is available.

A professional registered office service can provide a business address while keeping a home address separate from the public Companies House register. This is particularly relevant to accountants operating remotely or serving clients from outside the UK. It is important, however, to distinguish between a registered office and a trading address. They do not necessarily have to be the same.

Step 5: Select the Correct SIC Code

When incorporating the company, you must select one or more Standard Industrial Classification (SIC) codes describing the company's activities. For an accountancy practice, the appropriate code depends on the services actually being provided.

Possible activities may include accounting, bookkeeping, auditing, tax consultancy or other professional services. The correct choice should reflect the company's real business activities rather than simply selecting a broad code because it sounds commercially attractive.

SIC codes can be changed later if the company's activities evolve. They can also be updated through the confirmation statement process. A useful rule is simple: choose codes that accurately describe what the company actually does today.

Step 6: Incorporate the Company

Once the name, directors, shareholders, registered office and SIC information have been decided, the company can be incorporated with Companies House. The incorporation process establishes the company and creates its official Companies House record. After incorporation, the company will have its own:

• Company number
• Certificate of incorporation
• Registered office
• Directors
• Shareholders
• Persons with significant control, where applicable
• SIC codes

The company should then maintain appropriate statutory and accounting records. For international founders, the practical requirements can be more involved. A UK company can be owned or directed by people who live outside the UK, but banking, tax residence, identity verification and the nature of the business should be considered separately.

Step 7: Set Up Business Banking and Accounting Systems

Once the company exists, open a business bank account and keep company transactions separate from personal finances. This sounds obvious, but poor financial separation is one of the easiest ways for a small practice to create unnecessary accounting problems. A professional practice should ideally have a system for:

• Client invoicing
• Expense tracking
• Payroll
• Bank reconciliation
• VAT records where applicable
• Corporation Tax records
• Management reporting
• Document retention
• Client money, where relevant

If you are an accountant yourself, using your own practice as a demonstration of good financial controls can also strengthen your credibility with clients.

The Most Important Issue: Anti-Money Laundering Compliance

Opening a company does not by itself give an accountant permission to start providing regulated accountancy services without further compliance work. Accountancy service providers may be subject to the UK's Money Laundering Regulations. HMRC states that relevant services can include professional bookkeeping, accounts preparation, specific tax advice and assistance with completing tax returns. Depending on the business and professional arrangements, supervision may come from HMRC or an appropriate professional body. Relevant professional supervisory bodies include organisations such as:

• ICAEW
• ACCA
• ICAS
• AAT
• CIMA
• CIOT
• ICB
• IFA

The appropriate supervisor depends on the firm's circumstances and professional status.

What does AML compliance involve?

For an accountancy practice within scope, compliance can include:

• Customer due diligence
• Client identification and verification
• Risk assessment
• Record keeping
• Policies and procedures
• Staff training
• Suspicious activity reporting
• Ongoing monitoring

HMRC's current guidance states that accountancy service providers must meet requirements relating to customer due diligence, record keeping and suspicious activity reporting.

Importantly, AML obligations are not something to add after the practice has started taking clients. They should be built into the firm's onboarding process from the beginning. HMRC's current sector risk assessment also requires accountancy service providers to assess money laundering, terrorist financing and proliferation financing risks.

Professional Indemnity Insurance and Client Protection

Accountancy work involves professional risk. A mistake in a tax return, financial statement or advisory engagement could potentially cause a client financial loss. Professional indemnity insurance can therefore be an important part of establishing a practice.

Whether insurance is mandatory depends on the professional and regulatory circumstances of the firm, including membership or authorisation requirements. An accountant should check the requirements of their professional body and the services they intend to provide. It is also sensible to establish written engagement letters setting out:

• Services included
• Services excluded
• Fees
• Client responsibilities
• Deadlines
• Liability provisions
• Termination arrangements
• Data handling arrangements

Clear engagement terms are not just legal paperwork. They help prevent misunderstandings about what the accountant has—and has not—agreed to do.

Data Protection Matters for Accountants

Accountants routinely handle sensitive client information, including financial records, payroll information and personal data. A practice therefore needs appropriate data protection procedures and should understand its responsibilities under UK data protection law. Depending on the business model, this may involve:

• Privacy notices
• Data processing arrangements
• Secure cloud storage
• Access controls
• Backup procedures
• Password management
• Data retention policies
• Breach response procedures

An accountant working entirely online should pay particular attention to cybersecurity. A client database is valuable not only to the business but potentially to criminals.

Tax and Ongoing Company Compliance

After incorporation, the company continues to have obligations. These can include:

Corporation Tax

A UK limited company generally needs to deal with Corporation Tax on its taxable profits and meet HMRC filing and payment requirements.

Annual accounts

The company must prepare and file accounts with Companies House according to the applicable reporting requirements.

Confirmation statement

A confirmation statement must normally be filed at least once every 12 months. It confirms that Companies House information remains accurate and can also be used to update certain information, including shareholders, SIC codes and share capital.

Companies House records

Changes to directors, registered office details, people with significant control and other company information generally need to be reported when required rather than waiting for the annual confirmation statement. The deadlines matter. Companies House can impose penalties for late filings, and persistent non-compliance can ultimately put the company's status at risk.

A Practical Setup Checklist for an Accounting Practice

Before accepting your first client, make sure you have considered the following: Company structure

• Company name selected
• Director appointed
• Shareholders decided
• PSC information identified
• Registered office arranged
• SIC code selected
• Companies House incorporation completed
• Identity verification completed as required

Financial administration

• Business bank account
• Accounting software
• Invoicing process
• Expense procedures
• Tax calendar
• Record-keeping system

Professional compliance

• Appropriate AML supervision
• AML risk assessment
• Client due diligence procedures
• Engagement letters
• Professional indemnity insurance where required or appropriate
• Data protection and cybersecurity controls

Operational readiness

• Website and professional email
• Client onboarding process
• Secure document exchange
• Pricing structure
• Terms of business
• Backup and continuity procedures

For a global founder establishing a UK practice, it is particularly important to separate three questions: Can the company be incorporated? Can the founder legally provide the intended services? And where is the business actually tax resident and managed? Those questions can have different answers.

Common Mistakes Accountants Should Avoid

Choosing a company structure purely for tax reasons

Tax should be considered, but incorporation is not automatically the best answer for every accountant.

Starting client work before AML arrangements are ready

If your services fall within the relevant regulations, compliance should be operational before you begin providing those services.

Mixing personal and company money

This creates unnecessary accounting and governance problems.

Using an unsuitable home address

A registered office is public information. Consider the privacy implications before using a residential address.

Ignoring professional body requirements

Company incorporation and professional authorisation are separate matters.

Treating cybersecurity as an IT problem

For an accountant, cybersecurity is a client-trust issue. Protecting financial information should be part of the firm's operating model.

Should an Accountant Use IncorpUK to Set Up a UK Company?

For founders who are unfamiliar with UK company administration, a company formation and management platform such as IncorpUK can be useful for understanding the incorporation process and ongoing company requirements. The key point is to view company formation as one component of establishing the practice. Accountancy-specific obligations, particularly professional supervision, AML compliance, tax responsibilities and client protection need to be addressed separately.

Frequently Asked Questions

Can I open a UK company as a self-employed accountant?

Yes. An accountant can establish a UK limited company, provided the company and the individual's professional activities comply with applicable legal and regulatory requirements.

Does an accountancy company need AML supervision?

Potentially, yes. Accountancy service providers carrying out activities within the scope of the Money Laundering Regulations generally need to be supervised by HMRC or an appropriate professional body.

Can a non-UK resident open a UK accountancy company?

A non-UK resident can potentially own or direct a UK company, but incorporation is only one part of the analysis. Tax residence, banking, identity verification, professional regulation and the location from which the business is managed should also be considered.

Do I need to be a qualified accountant to form an accountancy company?

Company formation itself and the right to provide particular professional services are separate issues. Whether qualifications, authorisation or professional-body membership are required depends on the services offered and the regulatory framework applying to the practice.

What SIC code should an accountancy firm use?

The appropriate SIC code depends on the company's actual activities. Accountants should select codes that accurately reflect the services the company provides rather than choosing a code simply because it sounds broad or commercially appealing.

Does an accountant need professional indemnity insurance?

This depends on the firm's circumstances, professional membership and services. Some professional bodies and arrangements impose specific insurance requirements, while insurance may also be commercially prudent even where it is not compulsory.

Can I run an accountancy practice from home?

Yes, in many cases. However, consider planning requirements, client confidentiality, cybersecurity, insurance and whether your registered office address should be different from your home address.

What happens after I incorporate the company?

You still need to operate and maintain the company. This can include Corporation Tax compliance, annual accounts, confirmation statements, statutory records, bookkeeping and reporting changes to Companies House when required.

Conclusion

Opening a UK company for an accountancy practice involves much more than registering a name with Companies House. The incorporation itself is relatively straightforward: choose a suitable company structure, appoint directors, decide ownership, provide a registered office, select appropriate SIC codes and complete the Companies House process, including the applicable identity verification requirements.

The more important work begins afterwards. An accountancy practice needs sound AML procedures, appropriate professional supervision, strong client onboarding, secure handling of financial information, clear engagement terms and reliable tax and company administration. For a solo accountant, getting these foundations right from day one can make the business easier to manage. For a growing firm, they become the infrastructure that supports employees, larger clients, additional services and future expansion.

The strongest approach is therefore to treat company formation as the starting point, not the finish line for building a compliant, credible and commercially sustainable accountancy practice.