Wealth Management

Choosing the right structure for your business

Starting a small business can sometimes feel overwhelming and complicated. Although perhaps somewhat daunting, choosing the right legal structure for your business from the outset is vital. This will impact on your tax, liability, administration, and growth potential.

Below, we’ve highlighted the four most common legal structures for new businesses in the UK, along with key considerations to help you decide which is the right fit for you.

Matthew Jackson, Associate Director of Small Business at Old Mill, works on computer at desk in office space.

26th September 2025


Sole Trader

A sole trader is the simplest and most common structure for new businesses. You run the business as an individual, keeping all profits after tax but accepting all risk.

  • Register with HMRC for self-assessment as soon as you start trading.
  • No legal distinction between you and the business—personal assets are at risk if debts are incurred.
  • Pay income tax and Class 2/4 National Insurance on profits.
  • Maintain accurate financial records and submit an annual self-assessment tax return.

Partnership

A partnership involves two or more individuals (or companies) sharing management, profits and responsibilities. It offers more hands and skills but retains personal liability unless structured as an LLP. 

A written partnership agreement can help clarify both profit splits and exit arrangements. Profits are divided according to the partnership agreement. Each partner pays tax on their share and keeps records, and a nominated partner files a partnership tax return. 

  • Choose a partnership name and register with HMRC. 
  • The partnership submits self-assessment tax return to HMRC, but does not accrue a tax liability. 
  • Each partner registers with HMRC and submits their own self-assessment return. 
  • In a standard (general) partnership all partners share unlimited liability for debts. 

Limited Liability Partnership

An LLP combines partnership flexibility with limited liability protection for its members. It’s popular among professional firms but does come with additional administrative requirements compared to a traditional partnership. 

  • Must have at least two publicly stated designated members responsible for filing and compliance.
  • Members’ personal assets are protected; they’re only liable up to their capital contribution or an agreed amount.
  • Treated as a partnership for tax purposes: profits are distributed and taxed as individual income.
  • File annual accounts and an LLP return at Companies House.

Limited Company

A limited company is a separate legal entity, offering strong liability protection and potential tax efficiencies, but also more statutory administrative responsibility. It can be private (Ltd) or public (PLC).  

  • Register at Companies House with Memorandum and Articles of Association.
  • Directors and shareholders are recorded on the public register.
  • Directors are responsible for ensuring company statutory requirements are met.
  • Directors are employees of the company and can be paid a salary for their role.
  • Shareholders’ liability is limited to unpaid shares or any personal guaranteed amount.
  • Company pays Corporation Tax on profits.
  • Shareholders pay income tax on Dividends declared from post-tax profits.
  • Required to file annual accounts, Confirmation Statement and Corporation Tax return.

Other legal structures

Beyond the four main forms, the UK also offers: 

  • Community Interest Companies (CICs) for social enterprises
  • Cooperatives owned and run by members

These options cater to organisations that do not necessarily operate a trading activity for the purposes of generating a profit for their members, but operate for a wider social/community purpose. 


The right fit for your small business

When deciding which structure is best for your business, the following factors should be considered. 

  1. Tax implications and rates.
  2. Extent of personal liability you can assume.
  3. Funding requirements and ability to attract investors.
  4. Administrative burden and ongoing compliance.
  5. Long-term growth and exit strategy. 

How do I know I’ve made the right choice?


We’re here to help your small business get off to the best start possible. Of course, every business is unique dependent on what you’re doing, who you’re doing it with and what you aim to achieve.

By seeking professional legal and financial advice early, we can guide you towards the structure best aligned with your ambitions and risk tolerance – get in touch.